diff --git a/src/zutil/net/http/servlet/HttpServletRequestImpl.java b/src/zutil/net/http/servlet/HttpServletRequestImpl.java
new file mode 100644
index 0000000..aab5b3c
--- /dev/null
+++ b/src/zutil/net/http/servlet/HttpServletRequestImpl.java
@@ -0,0 +1,386 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Ziver Koc
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+package zutil.net.http.servlet;
+
+import javax.servlet.*;
+import javax.servlet.http.*;
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.UnsupportedEncodingException;
+import java.security.Principal;
+import java.util.Collection;
+import java.util.Enumeration;
+import java.util.Locale;
+import java.util.Map;
+
+
+public class HttpServletRequestImpl implements HttpServletRequest {
+
+
+    @Override
+    public String getAuthType() {
+        return null;
+    }
+
+    @Override
+    public Cookie[] getCookies() {
+        return new Cookie[0];
+    }
+
+    @Override
+    public long getDateHeader(String s) {
+        return 0;
+    }
+
+    @Override
+    public String getHeader(String s) {
+        return null;
+    }
+
+    @Override
+    public Enumeration<String> getHeaders(String s) {
+        return null;
+    }
+
+    @Override
+    public Enumeration<String> getHeaderNames() {
+        return null;
+    }
+
+    @Override
+    public int getIntHeader(String s) {
+        return 0;
+    }
+
+    @Override
+    public String getMethod() {
+        return null;
+    }
+
+    @Override
+    public String getPathInfo() {
+        return null;
+    }
+
+    @Override
+    public String getPathTranslated() {
+        return null;
+    }
+
+    @Override
+    public String getContextPath() {
+        return null;
+    }
+
+    @Override
+    public String getQueryString() {
+        return null;
+    }
+
+    @Override
+    public String getRemoteUser() {
+        return null;
+    }
+
+    @Override
+    public boolean isUserInRole(String s) {
+        return false;
+    }
+
+    @Override
+    public Principal getUserPrincipal() {
+        return null;
+    }
+
+    @Override
+    public String getRequestedSessionId() {
+        return null;
+    }
+
+    @Override
+    public String getRequestURI() {
+        return null;
+    }
+
+    @Override
+    public StringBuffer getRequestURL() {
+        return null;
+    }
+
+    @Override
+    public String getServletPath() {
+        return null;
+    }
+
+    @Override
+    public HttpSession getSession(boolean b) {
+        return null;
+    }
+
+    @Override
+    public HttpSession getSession() {
+        return null;
+    }
+
+    @Override
+    public String changeSessionId() {
+        return null;
+    }
+
+    @Override
+    public boolean isRequestedSessionIdValid() {
+        return false;
+    }
+
+    @Override
+    public boolean isRequestedSessionIdFromCookie() {
+        return false;
+    }
+
+    @Override
+    public boolean isRequestedSessionIdFromURL() {
+        return false;
+    }
+
+    @Override
+    public boolean isRequestedSessionIdFromUrl() {
+        return false;
+    }
+
+    @Override
+    public boolean authenticate(HttpServletResponse httpServletResponse) throws IOException, ServletException {
+        return false;
+    }
+
+    @Override
+    public void login(String s, String s1) throws ServletException {
+
+    }
+
+    @Override
+    public void logout() throws ServletException {
+
+    }
+
+    @Override
+    public Collection<Part> getParts() throws IOException, ServletException {
+        return null;
+    }
+
+    @Override
+    public Part getPart(String s) throws IOException, ServletException {
+        return null;
+    }
+
+    @Override
+    public <T extends HttpUpgradeHandler> T upgrade(Class<T> aClass) throws IOException, ServletException {
+        return null;
+    }
+
+    @Override
+    public Object getAttribute(String s) {
+        return null;
+    }
+
+    @Override
+    public Enumeration<String> getAttributeNames() {
+        return null;
+    }
+
+    @Override
+    public String getCharacterEncoding() {
+        return null;
+    }
+
+    @Override
+    public void setCharacterEncoding(String s) throws UnsupportedEncodingException {
+
+    }
+
+    @Override
+    public int getContentLength() {
+        return 0;
+    }
+
+    @Override
+    public long getContentLengthLong() {
+        return 0;
+    }
+
+    @Override
+    public String getContentType() {
+        return null;
+    }
+
+    @Override
+    public ServletInputStream getInputStream() throws IOException {
+        return null;
+    }
+
+    @Override
+    public String getParameter(String s) {
+        return null;
+    }
+
+    @Override
+    public Enumeration<String> getParameterNames() {
+        return null;
+    }
+
+    @Override
+    public String[] getParameterValues(String s) {
+        return new String[0];
+    }
+
+    @Override
+    public Map<String, String[]> getParameterMap() {
+        return null;
+    }
+
+    @Override
+    public String getProtocol() {
+        return null;
+    }
+
+    @Override
+    public String getScheme() {
+        return null;
+    }
+
+    @Override
+    public String getServerName() {
+        return null;
+    }
+
+    @Override
+    public int getServerPort() {
+        return 0;
+    }
+
+    @Override
+    public BufferedReader getReader() throws IOException {
+        return null;
+    }
+
+    @Override
+    public String getRemoteAddr() {
+        return null;
+    }
+
+    @Override
+    public String getRemoteHost() {
+        return null;
+    }
+
+    @Override
+    public void setAttribute(String s, Object o) {
+
+    }
+
+    @Override
+    public void removeAttribute(String s) {
+
+    }
+
+    @Override
+    public Locale getLocale() {
+        return null;
+    }
+
+    @Override
+    public Enumeration<Locale> getLocales() {
+        return null;
+    }
+
+    @Override
+    public boolean isSecure() {
+        return false;
+    }
+
+    @Override
+    public RequestDispatcher getRequestDispatcher(String s) {
+        return null;
+    }
+
+    @Override
+    public String getRealPath(String s) {
+        return null;
+    }
+
+    @Override
+    public int getRemotePort() {
+        return 0;
+    }
+
+    @Override
+    public String getLocalName() {
+        return null;
+    }
+
+    @Override
+    public String getLocalAddr() {
+        return null;
+    }
+
+    @Override
+    public int getLocalPort() {
+        return 0;
+    }
+
+    @Override
+    public ServletContext getServletContext() {
+        return null;
+    }
+
+    @Override
+    public AsyncContext startAsync() throws IllegalStateException {
+        return null;
+    }
+
+    @Override
+    public AsyncContext startAsync(ServletRequest servletRequest, ServletResponse servletResponse) throws IllegalStateException {
+        return null;
+    }
+
+    @Override
+    public boolean isAsyncStarted() {
+        return false;
+    }
+
+    @Override
+    public boolean isAsyncSupported() {
+        return false;
+    }
+
+    @Override
+    public AsyncContext getAsyncContext() {
+        return null;
+    }
+
+    @Override
+    public DispatcherType getDispatcherType() {
+        return null;
+    }
+}
diff --git a/src/zutil/net/http/servlet/HttpServletResponseImpl.java b/src/zutil/net/http/servlet/HttpServletResponseImpl.java
new file mode 100644
index 0000000..f8077cc
--- /dev/null
+++ b/src/zutil/net/http/servlet/HttpServletResponseImpl.java
@@ -0,0 +1,222 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Ziver Koc
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+package zutil.net.http.servlet;
+
+import javax.servlet.ServletOutputStream;
+import javax.servlet.http.Cookie;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.util.Collection;
+import java.util.Locale;
+
+public class HttpServletResponseImpl implements HttpServletResponse {
+
+
+    @Override
+    public void addCookie(Cookie cookie) {
+
+    }
+
+    @Override
+    public boolean containsHeader(String s) {
+        return false;
+    }
+
+    @Override
+    public String encodeURL(String s) {
+        return null;
+    }
+
+    @Override
+    public String encodeRedirectURL(String s) {
+        return null;
+    }
+
+    @Override
+    public String encodeUrl(String s) {
+        return null;
+    }
+
+    @Override
+    public String encodeRedirectUrl(String s) {
+        return null;
+    }
+
+    @Override
+    public void sendError(int i, String s) throws IOException {
+
+    }
+
+    @Override
+    public void sendError(int i) throws IOException {
+
+    }
+
+    @Override
+    public void sendRedirect(String s) throws IOException {
+
+    }
+
+    @Override
+    public void setDateHeader(String s, long l) {
+
+    }
+
+    @Override
+    public void addDateHeader(String s, long l) {
+
+    }
+
+    @Override
+    public void setHeader(String s, String s1) {
+
+    }
+
+    @Override
+    public void addHeader(String s, String s1) {
+
+    }
+
+    @Override
+    public void setIntHeader(String s, int i) {
+
+    }
+
+    @Override
+    public void addIntHeader(String s, int i) {
+
+    }
+
+    @Override
+    public void setStatus(int i) {
+
+    }
+
+    @Override
+    public void setStatus(int i, String s) {
+
+    }
+
+    @Override
+    public int getStatus() {
+        return 0;
+    }
+
+    @Override
+    public String getHeader(String s) {
+        return null;
+    }
+
+    @Override
+    public Collection<String> getHeaders(String s) {
+        return null;
+    }
+
+    @Override
+    public Collection<String> getHeaderNames() {
+        return null;
+    }
+
+    @Override
+    public String getCharacterEncoding() {
+        return null;
+    }
+
+    @Override
+    public String getContentType() {
+        return null;
+    }
+
+    @Override
+    public ServletOutputStream getOutputStream() throws IOException {
+        return null;
+    }
+
+    @Override
+    public PrintWriter getWriter() throws IOException {
+        return null;
+    }
+
+    @Override
+    public void setCharacterEncoding(String s) {
+
+    }
+
+    @Override
+    public void setContentLength(int i) {
+
+    }
+
+    @Override
+    public void setContentLengthLong(long l) {
+
+    }
+
+    @Override
+    public void setContentType(String s) {
+
+    }
+
+    @Override
+    public void setBufferSize(int i) {
+
+    }
+
+    @Override
+    public int getBufferSize() {
+        return 0;
+    }
+
+    @Override
+    public void flushBuffer() throws IOException {
+
+    }
+
+    @Override
+    public void resetBuffer() {
+
+    }
+
+    @Override
+    public boolean isCommitted() {
+        return false;
+    }
+
+    @Override
+    public void reset() {
+
+    }
+
+    @Override
+    public void setLocale(Locale locale) {
+
+    }
+
+    @Override
+    public Locale getLocale() {
+        return null;
+    }
+}
diff --git a/src/zutil/net/http/servlet/HttpSessionImpl.java b/src/zutil/net/http/servlet/HttpSessionImpl.java
new file mode 100644
index 0000000..5223eeb
--- /dev/null
+++ b/src/zutil/net/http/servlet/HttpSessionImpl.java
@@ -0,0 +1,119 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Ziver Koc
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+package zutil.net.http.servlet;
+
+import javax.servlet.ServletContext;
+import javax.servlet.http.HttpSession;
+import javax.servlet.http.HttpSessionContext;
+import java.util.Enumeration;
+
+
+public class HttpSessionImpl implements HttpSession {
+
+    @Override
+    public long getCreationTime() {
+        return 0;
+    }
+
+    @Override
+    public String getId() {
+        return null;
+    }
+
+    @Override
+    public long getLastAccessedTime() {
+        return 0;
+    }
+
+    @Override
+    public ServletContext getServletContext() {
+        return null;
+    }
+
+    @Override
+    public void setMaxInactiveInterval(int interval) {
+
+    }
+
+    @Override
+    public int getMaxInactiveInterval() {
+        return 0;
+    }
+
+    @Override
+    public HttpSessionContext getSessionContext() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public Object getAttribute(String name) {
+        return null;
+    }
+
+    @Override
+    public Object getValue(String name) {
+        return null;
+    }
+
+    @Override
+    public Enumeration<String> getAttributeNames() {
+        return null;
+    }
+
+    @Override
+    public String[] getValueNames() {
+        return new String[0];
+    }
+
+    @Override
+    public void setAttribute(String name, Object value) {
+
+    }
+
+    @Override
+    public void putValue(String name, Object value) {
+
+    }
+
+    @Override
+    public void removeAttribute(String name) {
+
+    }
+
+    @Override
+    public void removeValue(String name) {
+
+    }
+
+    @Override
+    public void invalidate() {
+
+    }
+
+    @Override
+    public boolean isNew() {
+        return false;
+    }
+}
diff --git a/src/zutil/osal/app/ffmpeg/FFmpeg.java b/src/zutil/osal/app/ffmpeg/FFmpeg.java
new file mode 100644
index 0000000..0b01603
--- /dev/null
+++ b/src/zutil/osal/app/ffmpeg/FFmpeg.java
@@ -0,0 +1,99 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Ziver Koc
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+package zutil.osal.app.ffmpeg;
+
+import zutil.osal.app.ffmpeg.FFmpegConstants.*;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Class for building a ffmpeg commandline for execution
+ *
+ * @see <a href="https://ffmpeg.org/ffmpeg.html">FFmpeg Commandline Documentation</a>
+ */
+public class FFmpeg {
+
+    private FFmpegLogLevel logLevel;
+    private boolean overwriteOutput = false;
+    private List<FFmpegInput> inputs = new ArrayList<>();
+    private List<FFmpegOutput> outputs = new ArrayList<>();
+
+
+    public FFmpeg() {}
+
+
+    public void setLogLevel(FFmpegLogLevel level) {
+        this.logLevel = level;
+    }
+
+    /**
+     * @param overwrite Set to true if all outputs should be overwritten if they exist, false if FFmpeg should exit with error.
+     */
+    public void enableOutputOverwrite(boolean overwrite) {
+        this.overwriteOutput = overwrite;
+    }
+
+    public void addInput(FFmpegInput input) {
+        inputs.add(input);
+    }
+
+    public void addOutput(FFmpegOutput output) {
+        outputs.add(output);
+    }
+
+
+    public String buildCommand() {
+        StringBuilder command = new StringBuilder();
+        command.append("ffmpeg");
+
+        // General inputs
+
+        if (logLevel != null) {
+            command.append(" -loglevel ").append(logLevel.toString().toLowerCase());
+        }
+
+        if (overwriteOutput) {
+            command.append(" -y");
+        }
+
+        // TODO: -progress url (global) for progress status
+        // TODO: -stdin Enable interaction on standard input
+
+        // Inputs
+
+        for (FFmpegInput input : inputs) {
+            command.append(" ").append(input.buildCommand());
+        }
+
+        // Outputs
+
+        for (FFmpegOutput output : outputs) {
+            command.append(" ").append(output.buildCommand());
+        }
+
+        return command.toString();
+    }
+}
diff --git a/src/zutil/osal/app/ffmpeg/FFmpegConstants.java b/src/zutil/osal/app/ffmpeg/FFmpegConstants.java
new file mode 100644
index 0000000..76b5d86
--- /dev/null
+++ b/src/zutil/osal/app/ffmpeg/FFmpegConstants.java
@@ -0,0 +1,418 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Ziver Koc
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+package zutil.osal.app.ffmpeg;
+
+public final class FFmpegConstants {
+
+    public enum FFmpegLogLevel {
+        /** Show nothing at all; be silent. **/
+        QUIET,
+        /** Only show fatal errors which could lead the process to crash, such as an assertion failure. This is not currently used for anything. **/
+        PANIC,
+        /** Only show fatal errors. These are errors after which the process absolutely cannot continue.**/
+        FATAL,
+        /** Show all errors, including ones which can be recovered from. **/
+        ERROR,
+        /** Show all warnings and errors. Any message related to possibly incorrect or unexpected events will be shown. **/
+        WARNING,
+        /** Show informative messages during processing. This is in addition to warnings and errors. This is the default value. **/
+        INFO,
+        /** Same as info, except more verbose. **/
+        VERBOSE,
+        /** Show everything, including debugging information. **/
+        DEBUG,
+        TRACE
+    }
+
+    public enum FFmpegHwDevice {
+        cuda,
+        dxva2,
+        vaapi,
+        vdpau,
+        qsv,
+        opencl,
+        vulkan
+    }
+
+    public enum FFmpegVideoCodec {
+        /** Multicolor charset for Commodore 64 (encoders: a64multi ) **/
+        a64multi,
+        /** Multicolor charset for Commodore 64, extended with 5th color (colram) (encoders: a64multi5 )**/
+        a64multi5,
+        /** Alias/Wavefront PIX image **/
+        alias_pix,
+        /** AMV Video **/
+        amv,
+        /** APNG (Animated Portable Network Graphics) image **/
+        apng,
+        /** ASUS V1 **/
+        asv1,
+        /** ASUS V2 **/
+        asv2,
+        /** Alliance for Open Media AV1 (decoders: libdav1d libaom-av1 ) (encoders: libaom-av1 librav1e ) **/
+        libaom_av1,
+        librav1e,
+        /** Avid 1:1 10-bit RGB Packer **/
+        avrp,
+        /** AVS2-P2/IEEE1857.4 (decoders: libdavs2 ) (encoders: libxavs2 ) **/
+        libxavs2,
+        /** Avid Meridien Uncompressed **/
+        avui,
+        /** Uncompressed packed MS 4:4:4:4 **/
+        ayuv,
+        /** BMP (Windows and OS/2 bitmap) **/
+        bmp,
+        /** Cinepak **/
+        cinepak,
+        /** Cirrus Logic AccuPak **/
+        cljr,
+        /** Copy input to output without modification **/
+        copy,
+        /** Dirac (encoders: vc2 ) **/
+        vc2,
+        /** VC3/DNxHD **/
+        dnxhd,
+        /** DPX (Digital Picture Exchange) image **/
+        dpx,
+        /** DV (Digital Video) **/
+        dvvideo,
+        /** FFmpeg video codec #1 **/
+        ffv1,
+        /** Huffyuv FFmpeg variant **/
+        ffvhuff,
+        /** FITS (Flexible Image Transport System) **/
+        fits,
+        /** Flash Screen Video v1 **/
+        flashsv,
+        /** Flash Screen Video v2 **/
+        flashsv2,
+        /** FLV / Sorenson Spark / Sorenson H.263 (Flash Video) (decoders: flv ) (encoders: flv ) **/
+        flv,
+        /** CompuServe GIF (Graphics Interchange Format) **/
+        gif,
+        /** H.261 **/
+        h261,
+        /** H.263 / H.263-1996, H.263+ / H.263-1998 / H.263 version 2 **/
+        h263,
+        /** H.263+ / H.263-1998 / H.263 version 2 **/
+        h263p,
+        /** H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (decoders: h264 h264_qsv h264_cuvid ) (encoders: libx264 libx264rgb h264_amf h264_mf h264_nvenc h264_qsv nvenc nvenc_h264 ) **/
+        libx264,
+        libx264rgb,
+        h264_amf,
+        h264_mf,
+        h264_nvenc,
+        h264_qsv,
+        nvenc,
+        nvenc_h264,
+        /** H.265 / HEVC (High Efficiency Video Coding) (decoders: hevc hevc_qsv hevc_cuvid ) (encoders: libx265 nvenc_hevc hevc_amf hevc_mf hevc_nvenc hevc_qsv ) **/
+        libx265,
+        nvenc_hevc,
+        hevc_amf,
+        hevc_mf,
+        hevc_nvenc,
+        hevc_qsv,
+        /** HuffYUV **/
+        huffyuv,
+        /** JPEG 2000 (decoders: jpeg2000 libopenjpeg ) (encoders: jpeg2000 libopenjpeg ) **/
+        jpeg2000,
+        libopenjpeg,
+        /** JPEG-LS **/
+        jpegls,
+        /** Lossless JPEG **/
+        ljpeg,
+        /** MagicYUV video **/
+        magicyuv,
+        /** Motion JPEG (decoders: mjpeg mjpeg_cuvid mjpeg_qsv ) (encoders: mjpeg mjpeg_qsv ) **/
+        mjpeg,
+        mjpeg_qsv,
+        /** MPEG-1 video (decoders: mpeg1video mpeg1_cuvid ) **/
+        mpeg1video,
+        /** MPEG-2 video (decoders: mpeg2video mpegvideo mpeg2_qsv mpeg2_cuvid ) (encoders: mpeg2video mpeg2_qsv ) **/
+        mpeg2video,
+        mpeg2_qsv,
+        /** MPEG-4 part 2 (decoders: mpeg4 mpeg4_cuvid ) (encoders: mpeg4 libxvid ) **/
+        mpeg4,
+        libxvid,
+        /** MPEG-4 part 2 Microsoft variant version 2 **/
+        msmpeg4v2,
+        /** MPEG-4 part 2 Microsoft variant version 3 (decoders: msmpeg4 ) (encoders: msmpeg4 ) **/
+        msmpeg4,
+        /** Microsoft Video 1 **/
+        msvideo1,
+        /** PAM (Portable AnyMap) image **/
+        pam,
+        /** PBM (Portable BitMap) image **/
+        pbm,
+        /** PC Paintbrush PCX image **/
+        pcx,
+        /** PGM (Portable GrayMap) image **/
+        pgm,
+        /** PGMYUV (Portable GrayMap YUV) image **/
+        pgmyuv,
+        /** PNG (Portable Network Graphics) image **/
+        png,
+        /** PPM (Portable PixelMap) image **/
+        ppm,
+        /** Apple ProRes (iCodec Pro) (encoders: prores prores_aw prores_ks ) **/
+        prores,
+        prores_aw,
+        prores_ks,
+        /** QuickTime Animation (RLE) video **/
+        qtrle,
+        /** AJA Kona 10-bit RGB Codec **/
+        r10k,
+        /** Uncompressed RGB 10-bit **/
+        r210,
+        /** raw video **/
+        rawvideo,
+        /** id RoQ video (decoders: roqvideo ) (encoders: roqvideo ) **/
+        roqvideo,
+        /** RealVideo 1.0 **/
+        rv10,
+        /** RealVideo 2.0 **/
+        rv20,
+        /** SGI image **/
+        sgi,
+        /** Snow **/
+        snow,
+        /** Sun Rasterfile image **/
+        sunrast,
+        /** Sorenson Vector Quantizer 1 / Sorenson Video 1 / SVQ1 **/
+        svq1,
+        /** Truevision Targa image **/
+        targa,
+        /** Theora (encoders: libtheora ) **/
+        libtheora,
+        /** TIFF image **/
+        tiff,
+        /** Ut Video **/
+        utvideo,
+        /** Uncompressed 4:2:2 10-bit **/
+        v210,
+        /** Uncompressed packed 4:4:4 **/
+        v308,
+        /** Uncompressed packed QT 4:4:4:4 **/
+        v408,
+        /** Uncompressed 4:4:4 10-bit **/
+        v410,
+        /** On2 VP8 (decoders: vp8 libvpx vp8_cuvid vp8_qsv ) (encoders: libvpx ) **/
+        libvpx,
+        /** Google VP9 (decoders: vp9 libvpx-vp9 vp9_cuvid vp9_qsv ) (encoders: libvpx-vp9 vp9_qsv ) **/
+        libvpx_vp9,
+        vp9_qsv,
+        /** WebP (encoders: libwebp_anim libwebp ) **/
+        libwebp_anim,
+        libwebp,
+        /** Windows Media Video 7 **/
+        wmv1,
+        /** Windows Media Video 8 **/
+        wmv2,
+        /** AVFrame to AVPacket passthrough **/
+        wrapped_avframe,
+        /** XBM (X BitMap) image **/
+        xbm,
+        /** X-face image **/
+        xface,
+        /** XWD (X Window Dump) image **/
+        xwd,
+        /** Uncompressed YUV 4:1:1 12-bit **/
+        y41p,
+        /** Uncompressed packed 4:2:0 **/
+        yuv4,
+        /** LCL (LossLess Codec Library) ZLIB **/
+        zlib,
+        /** Zip Motion Blocks Video **/
+        zmbv
+    }
+
+    public enum FFmpegAudioCodec {
+        /** AAC (Advanced Audio Coding) (decoders: aac aac_fixed ) (encoders: aac aac_mf ) **/
+        aac,
+        aac_mf,
+        /** ATSC A/52A (AC-3) (decoders: ac3 ac3_fixed ) (encoders: ac3 ac3_fixed ac3_mf ) **/
+        ac3,
+        ac3_fixed,
+        ac3_mf,
+        /** SEGA CRI ADX ADPCM **/
+        adpcm_adx,
+        /** G.722 ADPCM (decoders: g722 ) (encoders: g722 ) **/
+        g722,
+        /** G.726 ADPCM (decoders: g726 ) (encoders: g726 ) **/
+        g726,
+        /** G.726 ADPCM little-endian (decoders: g726le ) (encoders: g726le ) **/
+        g726le,
+        /** ADPCM IMA QuickTime **/
+        adpcm_ima_qt,
+        /** ADPCM IMA Simon & Schuster Interactive **/
+        adpcm_ima_ssi,
+        /** ADPCM IMA WAV **/
+        adpcm_ima_wav,
+        /** ADPCM Microsoft **/
+        adpcm_ms,
+        /** ADPCM Shockwave Flash **/
+        adpcm_swf,
+        /** ADPCM Yamaha **/
+        adpcm_yamaha,
+        /** ALAC (Apple Lossless Audio Codec) **/
+        alac,
+        /** AMR-NB (Adaptive Multi-Rate NarrowBand) (decoders: amrnb libopencore_amrnb ) (encoders: libopencore_amrnb ) **/
+        libopencore_amrnb,
+        /** aptX (Audio Processing Technology for Bluetooth) **/
+        aptx,
+        /** aptX HD (Audio Processing Technology for Bluetooth) **/
+        aptx_hd,
+        /** Copy input to output without modification **/
+        copy,
+        /** RFC 3389 Comfort Noise **/
+        comfortnoise,
+        /** DCA (DTS Coherent Acoustics) (decoders: dca ) (encoders: dca ) **/
+        dca,
+        /** ATSC A/52B (AC-3, E-AC-3) **/
+        eac3,
+        /** FLAC (Free Lossless Audio Codec) **/
+        flac,
+        /** G.723.1 **/
+        g723_1,
+        /** MLP (Meridian Lossless Packing) **/
+        mlp,
+        /** MP2 (MPEG audio layer 2) (decoders: mp2 mp2float ) (encoders: mp2 mp2fixed libtwolame ) **/
+        mp2,
+        /** MP3 (MPEG audio layer 3) (decoders: mp3float mp3 ) (encoders: libmp3lame mp3_mf ) **/
+        libmp3lame,
+        mp3_mf,
+        /** Nellymoser Asao **/
+        nellymoser,
+        /** Opus (Opus Interactive Audio Codec) (decoders: opus libopus ) (encoders: opus libopus ) **/
+        opus,
+        libopus,
+        /** PCM A-law / G.711 A-law **/
+        pcm_alaw,
+        /** PCM signed 20|24-bit big-endian **/
+        pcm_dvd,
+        /** PCM 32-bit floating point big-endian **/
+        pcm_f32be,
+        /** PCM 32-bit floating point little-endian **/
+        pcm_f32le,
+        /** PCM 64-bit floating point big-endian **/
+        pcm_f64be,
+        /** PCM 64-bit floating point little-endian **/
+        pcm_f64le,
+        /** PCM mu-law / G.711 mu-law **/
+        pcm_mulaw,
+        /** PCM signed 16-bit big-endian **/
+        pcm_s16be,
+        /** PCM signed 16-bit big-endian planar **/
+        pcm_s16be_planar,
+        /** PCM signed 16-bit little-endian **/
+        pcm_s16le,
+        /** PCM signed 16-bit little-endian planar **/
+        pcm_s16le_planar,
+        /** PCM signed 24-bit big-endian **/
+        pcm_s24be,
+        /** PCM D-Cinema audio signed 24-bit **/
+        pcm_s24daud,
+        /** PCM signed 24-bit little-endian **/
+        pcm_s24le,
+        /** PCM signed 24-bit little-endian planar **/
+        pcm_s24le_planar,
+        /** PCM signed 32-bit big-endian **/
+        pcm_s32be,
+        /** PCM signed 32-bit little-endian **/
+        pcm_s32le,
+        /** PCM signed 32-bit little-endian planar **/
+        pcm_s32le_planar,
+        /** PCM signed 64-bit big-endian **/
+        pcm_s64be,
+        /** PCM signed 64-bit little-endian **/
+        pcm_s64le,
+        /** PCM signed 8-bit **/
+        pcm_s8,
+        /** PCM signed 8-bit planar **/
+        pcm_s8_planar,
+        /** PCM unsigned 16-bit big-endian **/
+        pcm_u16be,
+        /** PCM unsigned 16-bit little-endian **/
+        pcm_u16le,
+        /** PCM unsigned 24-bit big-endian **/
+        pcm_u24be,
+        /** PCM unsigned 24-bit little-endian **/
+        pcm_u24le,
+        /** PCM unsigned 32-bit big-endian **/
+        pcm_u32be,
+        /** PCM unsigned 32-bit little-endian **/
+        pcm_u32le,
+        /** PCM unsigned 8-bit **/
+        pcm_u8,
+        /** PCM Archimedes VIDC **/
+        pcm_vidc,
+        /** RealAudio 1.0 (14.4K) (decoders: real_144 ) (encoders: real_144 ) **/
+        real_144,
+        /** DPCM id RoQ **/
+        roq_dpcm,
+        /** SMPTE 302M **/
+        s302m,
+        /** SBC (low-complexity subband codec) **/
+        sbc,
+        /** Sonic **/
+        sonic,
+        /** Sonic lossless **/
+        sonicls,
+        /** TrueHD **/
+        truehd,
+        /** TTA (True Audio) **/
+        tta,
+        /** Vorbis (decoders: vorbis libvorbis ) (encoders: vorbis libvorbis ) **/
+        vorbis,
+        libvorbis,
+        /** WavPack **/
+        wavpack,
+        /** Windows Media Audio 1 **/
+        wmav1,
+        /** Windows Media Audio 2 **/
+        wmav2
+    }
+
+    public enum FFmpegSubtitleCodec {
+        /** ASS (Advanced SSA) subtitle (decoders: ssa ass ) (encoders: ssa ass) **/
+        ass,
+        ssa,
+        /** DVB subtitles (decoders: dvbsub ) (encoders: dvbsub ) **/
+        dvbsub,
+        /** DVD subtitles (decoders: dvdsub ) (encoders: dvdsub ) **/
+        dvdsub,
+        /** MOV text **/
+        mov_text,
+        /** SubRip subtitle (decoders: srt subrip ) (encoders: srt subrip ) **/
+        srt,
+        subrip,
+        /** raw UTF-8 text **/
+        text,
+        /** WebVTT subtitle **/
+        webvtt,
+        /** XSUB **/
+        xsub
+    }
+}
diff --git a/src/zutil/osal/app/ffmpeg/FFmpegInput.java b/src/zutil/osal/app/ffmpeg/FFmpegInput.java
new file mode 100644
index 0000000..873851c
--- /dev/null
+++ b/src/zutil/osal/app/ffmpeg/FFmpegInput.java
@@ -0,0 +1,141 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Ziver Koc
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+package zutil.osal.app.ffmpeg;
+
+/**
+ * Class includes data related to a single input into FFmpeg
+ */
+public class FFmpegInput {
+    // General Options
+
+    private String input;
+    private Float duration;
+    private Float positionStart;
+    private Float positionEnd;
+
+    // Audio Options
+
+    private boolean audioEnabled = true;
+
+    // Subtitle Options
+
+    private boolean subtitleEnabled = true;
+
+
+
+    public FFmpegInput(String input) {
+        this.input = input;
+    }
+
+
+    /**
+     * Limit the duration of data read from the input file.
+     * {@link #setDuration(float)} and {@link #setEndPosition(float)} are mutually exclusive and {@link #setDuration(float)} has priority.
+     *
+     * @param duration duration in seconds
+     */
+    public void setDuration(float duration) {
+        this.duration = duration;
+    }
+    /**
+     * Seeks in this input file to position.
+     *
+     * @param position Position in seconds
+     */
+    public void setStartPosition(float position) {
+        this.positionStart = position;
+    }
+    /**
+     * Stop reading the input file at position.
+     * {@link #setDuration(float)} and {@link #setEndPosition(float)} are mutually exclusive and {@link #setDuration(float)} has priority.
+     *
+     * @param position Position in seconds
+     */
+    public void setEndPosition(float position) {
+        this.positionEnd = position;
+    }
+
+    // ----------------------------------------------------
+    // Audio Options
+    // ----------------------------------------------------
+
+    /**
+     * Enable or Blocks audio from input file. (enabled by default)
+     *
+     * @param enabled Set to false to disable audio
+     */
+    public void setAudioEnabled(boolean enabled) {
+        this.audioEnabled = enabled;
+    }
+
+    // ----------------------------------------------------
+    // Subtitle Options
+    // ----------------------------------------------------
+
+    /**
+     * Enable or Blocks subtitles from input file. (enabled by default)
+     *
+     * @param enabled Set to false to disable subtitles
+     */
+    public void setSubtitleEnabled(boolean enabled) {
+        this.subtitleEnabled = enabled;
+    }
+
+    // ----------------------------------------------------
+    // Command Generation
+    // ----------------------------------------------------
+
+    protected String buildCommand() {
+        StringBuilder command = new StringBuilder();
+
+        // ----------------------------------------------------
+        // General Options
+        // ----------------------------------------------------
+
+        if (positionStart != null)
+            command.append(" -ss ").append(positionStart);
+        if (positionEnd != null)
+            command.append(" -to ").append(positionEnd);
+        if (duration != null)
+            command.append(" -t ").append(duration);
+
+        // ----------------------------------------------------
+        // Audio Options
+        // ----------------------------------------------------
+
+        if (!audioEnabled)
+            command.append(" -an");
+
+        // ----------------------------------------------------
+        // Subtitle Options
+        // ----------------------------------------------------
+
+        if (!subtitleEnabled)
+            command.append(" -sn");
+
+        command.append(" -i ").append(input);
+        return command.toString().trim();
+    }
+}
\ No newline at end of file
diff --git a/src/zutil/osal/app/ffmpeg/FFmpegOutput.java b/src/zutil/osal/app/ffmpeg/FFmpegOutput.java
new file mode 100644
index 0000000..c985a2d
--- /dev/null
+++ b/src/zutil/osal/app/ffmpeg/FFmpegOutput.java
@@ -0,0 +1,342 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Ziver Koc
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+package zutil.osal.app.ffmpeg;
+
+import zutil.osal.app.ffmpeg.FFmpegConstants.FFmpegAudioCodec;
+import zutil.osal.app.ffmpeg.FFmpegConstants.FFmpegSubtitleCodec;
+import zutil.osal.app.ffmpeg.FFmpegConstants.FFmpegVideoCodec;
+
+/**
+ * Class includes data related to a single output from FFmpeg
+ */
+public class FFmpegOutput {
+    // General Options
+
+    private String output;
+    private Float duration;
+    private Float positionStart;
+    private Float positionEnd;
+    private Long fileSize;
+    private Integer encodingPass;
+
+    // Video Options
+
+    private String videoCodec;
+    private Float videoFrameRate;
+    private Integer videoWidth;
+    private Integer videoHeight;
+    private Integer videoBitRate;
+    private Integer videoQuality;
+
+    // Audio Options
+
+    private String audioCodec;
+    private Integer audioSampleRate;
+    private Integer audioChannels;
+    private Integer audioBitRate;
+    private Integer audioQuality;
+    private boolean audioEnabled = true;
+
+    // Subtitle Options
+
+    private String subtitleCodec;
+    private boolean subtitleEnabled = true;
+
+
+    public FFmpegOutput(String output) {
+        this.output = output;
+    }
+
+
+    /**
+     * Stop writing the output after its duration reaches duration.
+     * {@link #setDuration(float)} and {@link #setEndPosition(float)} are mutually exclusive and {@link #setDuration(float)} has priority.
+     *
+     * @param duration duration in seconds
+     */
+    public void setDuration(float duration) {
+        this.duration = duration;
+    }
+    /**
+     * Decodes but discards input until the timestamps reach position.
+     *
+     * @param position Position in seconds
+     */
+    public void setStartPosition(float position) {
+        this.positionStart = position;
+    }
+    /**
+     * Stop writing the output at position.
+     * {@link #setDuration(float)} and {@link #setEndPosition(float)} are mutually exclusive and {@link #setDuration(float)} has priority.
+     *
+     * @param position Position in seconds
+     */
+    public void setEndPosition(float position) {
+        this.positionEnd = position;
+    }
+
+    /**
+     * Set the file size limit.
+     *
+     * @param size Size of the file in bytes
+     */
+    public void setTargetFileSize(long size) {
+        this.fileSize = size;
+    }
+
+    /**
+     * Select the pass number (1 or 2). It is used to do two-pass video encoding.
+     *
+     * @param pass THe pass number
+     */
+    public void setEncodingPass(int pass) {
+        this.encodingPass = pass;
+    }
+
+    // ----------------------------------------------------
+    // Video Options
+    // ----------------------------------------------------
+
+    /**
+     * Select an encoder.
+     *
+     * @param codec Codec name supported by FFmpeg
+     */
+    public void setVideoCodec(FFmpegVideoCodec codec) {
+        this.videoCodec = codec.toString();
+    }
+    /**
+     * Select an encoder.
+     *
+     * @param codec Codec name supported by FFmpeg
+     */
+    public void setVideoCodec(String codec) {
+        this.videoCodec = codec;
+    }
+
+    /**
+     * Duplicate or drop input frames to achieve provided constant output frame rate (fps).
+     *
+     * @param frameRate Frame rate in Hz
+     */
+    public void setVideoFrameRate(float frameRate) {
+        this.videoFrameRate = frameRate;
+    }
+
+    /**
+     * Set the target resolution of the output file.
+     *
+     * @param width The width in pixels
+     * @param height The height in pixels
+     */
+    public void setVideoResolution(int width, int height) {
+        this.videoWidth = width;
+        this.videoHeight = height;
+    }
+
+    /**
+     * Set constant video bitrate.
+     *
+     * @param bitrate Rate in number of bits
+     */
+    public void setVideoBitRate(int bitrate) {
+        this.videoBitRate = bitrate;
+    }
+
+    /**
+     * Use fixed quality scale (VBR).
+     *
+     * @param vbr The meaning of q/qscale is codec-dependent.
+     */
+    public void setVideoQuality(int vbr) {
+        this.videoQuality = vbr;
+    }
+
+    // ----------------------------------------------------
+    // Audio Options
+    // ----------------------------------------------------
+
+    /**
+     * Select an encoder.
+     *
+     * @param codec Codec name supported by FFmpeg
+     */
+    public void setAudioCodec(FFmpegAudioCodec codec) {
+        this.audioCodec = codec.toString();
+    }
+    /**
+     * Select an encoder.
+     *
+     * @param codec Codec name supported by FFmpeg
+     */
+    public void setAudioCodec(String codec) {
+        this.audioCodec = codec;
+    }
+
+    /**
+     * Set the audio sampling frequency. For output streams it is set by default to the frequency of the corresponding input stream.
+     *
+     * @param sampleRate Audio sampling frequency
+     */
+    public void setAudioSampleRate(int sampleRate) {
+        this.audioSampleRate = sampleRate;
+    }
+
+    /**
+     * Set the number of audio channels. For output streams it is set by default to the number of input audio channels.
+     *
+     * @param channels Number of audio channels in output file
+     */
+    public void setAudioChannels(int channels) {
+        this.audioChannels = channels;
+    }
+
+    /**
+     * Set constant audio bitrate
+     *
+     * @param bitrate Rate in number of bits
+     */
+    public void setAudioBitRate(int bitrate) {
+        this.audioBitRate = bitrate;
+    }
+
+    /**
+     * Use fixed quality scale (VBR).
+     *
+     * @param vbr The meaning of q/qscale is codec-dependent.
+     */
+    public void setAudioQuality(int vbr) {
+        this.audioQuality = vbr;
+    }
+
+    /**
+     * Enable or Disables audio recording in output file. (enabled by default)
+     *
+     * @param enabled Set to false to disable audio
+     */
+    public void setAudioEnabled(boolean enabled) {
+        this.audioEnabled = enabled;
+    }
+
+    // ----------------------------------------------------
+    // Subtitle Options
+    // ----------------------------------------------------
+
+    /**
+     * Select an encoder.
+     *
+     * @param codec Codec name supported by FFmpeg
+     */
+    public void setSubtitleCodec(FFmpegSubtitleCodec codec) {
+        this.subtitleCodec = codec.toString();
+    }
+    /**
+     * Select an encoder.
+     *
+     * @param codec Codec name supported by FFmpeg
+     */
+    public void setSubtitleCodec(String codec) {
+        this.subtitleCodec = codec;
+    }
+
+    /**
+     * Enable or Disables subtitles in output file. (enabled by default)
+     *
+     * @param enabled Set to false to disable subtitles
+     */
+    public void setSubtitleEnabled(boolean enabled) {
+        this.subtitleEnabled = enabled;
+    }
+
+    // ----------------------------------------------------
+    // Command Generation
+    // ----------------------------------------------------
+
+    protected String buildCommand() {
+        StringBuilder command = new StringBuilder();
+
+        // ----------------------------------------------------
+        // General Options
+        // ----------------------------------------------------
+
+        if (positionStart != null)
+            command.append(" -ss ").append(positionStart);
+        if (positionEnd != null)
+            command.append(" -to ").append(positionEnd);
+        if (duration != null)
+            command.append(" -t ").append(duration);
+        if (fileSize != null)
+            command.append(" -fs ").append(fileSize);
+
+        if (encodingPass != null)
+            command.append(" -pass ").append(encodingPass);
+
+        // ----------------------------------------------------
+        // Video Options
+        // ----------------------------------------------------
+
+        if (videoCodec != null)
+            command.append(" -codec:v ").append(videoCodec);
+        if (videoFrameRate != null)
+            command.append(" -frames ").append(videoFrameRate);
+        if (videoWidth != null && videoHeight != null)
+            command.append(" -filter:v scale=").append(videoWidth).append(':').append(videoHeight);
+        if (videoBitRate != null)
+            command.append(" -b:v ").append(videoBitRate);
+        if (videoQuality != null)
+            command.append(" -qscale:v ").append(videoQuality);
+
+        // ----------------------------------------------------
+        // Audio Options
+        // ----------------------------------------------------
+
+        if (audioCodec != null)
+            command.append(" -codec:a ").append(audioCodec);
+        if (audioSampleRate != null)
+            command.append(" -ar ").append(audioSampleRate);
+        if (audioChannels != null)
+            command.append(" -ac ").append(audioChannels);
+        if (audioBitRate != null)
+            command.append(" -b:a ").append(audioBitRate);
+        if (audioQuality != null)
+            command.append(" -qscale:a ").append(audioQuality);
+
+        if (!audioEnabled)
+            command.append(" -an");
+
+        // ----------------------------------------------------
+        // Subtitle Options
+        // ----------------------------------------------------
+
+        if (subtitleCodec != null)
+            command.append(" -codec:s ").append(subtitleCodec);
+
+        if (!subtitleEnabled)
+            command.append(" -sn");
+
+        command.append(' ').append(output);
+        return command.toString().trim();
+    }
+}
\ No newline at end of file
diff --git a/test/zutil/osal/app/ffmpeg/FFmpegInputTest.java b/test/zutil/osal/app/ffmpeg/FFmpegInputTest.java
new file mode 100644
index 0000000..acc3a78
--- /dev/null
+++ b/test/zutil/osal/app/ffmpeg/FFmpegInputTest.java
@@ -0,0 +1,56 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Ziver Koc
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+package zutil.osal.app.ffmpeg;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+public class FFmpegInputTest {
+
+    @Test
+    public void onlyInput() {
+        FFmpegInput ffmpegInput = new FFmpegInput("iTest.mp4");
+
+        assertEquals("-i iTest.mp4", ffmpegInput.buildCommand());
+    }
+
+    @Test
+    public void options() {
+        FFmpegInput ffmpegInput = new FFmpegInput("iTest.mp4");
+        ffmpegInput.setDuration(10.1f);
+        ffmpegInput.setStartPosition(9.1f);
+        ffmpegInput.setEndPosition(20.1f);
+
+        ffmpegInput.setAudioEnabled(false);
+
+        ffmpegInput.setSubtitleEnabled(false);
+
+        assertEquals("-ss 9.1 -to 20.1 -t 10.1" +
+                " -an" +
+                " -sn" +
+                " -i iTest.mp4", ffmpegInput.buildCommand());
+    }
+}
\ No newline at end of file
diff --git a/test/zutil/osal/app/ffmpeg/FFmpegOutputTest.java b/test/zutil/osal/app/ffmpeg/FFmpegOutputTest.java
new file mode 100644
index 0000000..d065b18
--- /dev/null
+++ b/test/zutil/osal/app/ffmpeg/FFmpegOutputTest.java
@@ -0,0 +1,74 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Ziver Koc
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+package zutil.osal.app.ffmpeg;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+public class FFmpegOutputTest {
+
+    @Test
+    public void onlyOutput() {
+        FFmpegOutput ffmpegOutput = new FFmpegOutput("oTest.mp4");
+
+        assertEquals("oTest.mp4", ffmpegOutput.buildCommand());
+    }
+
+
+    @Test
+    public void options() {
+        FFmpegOutput ffmpegOutput = new FFmpegOutput("oTest.mp4");
+        ffmpegOutput.setDuration(10.1f);
+        ffmpegOutput.setStartPosition(9.1f);
+        ffmpegOutput.setEndPosition(20.1f);
+        ffmpegOutput.setTargetFileSize(1000);
+        ffmpegOutput.setEncodingPass(2);
+
+        ffmpegOutput.setVideoCodec(FFmpegConstants.FFmpegVideoCodec.libx264);
+        ffmpegOutput.setVideoFrameRate(29.8f);
+        ffmpegOutput.setVideoResolution(320, 240);
+        ffmpegOutput.setVideoBitRate(300_000);
+        ffmpegOutput.setVideoQuality(22);
+
+        ffmpegOutput.setAudioCodec(FFmpegConstants.FFmpegAudioCodec.libmp3lame);
+        ffmpegOutput.setAudioSampleRate(48_000);
+        ffmpegOutput.setAudioChannels(6);
+        ffmpegOutput.setAudioBitRate(360_000);
+        ffmpegOutput.setAudioQuality(23);
+        ffmpegOutput.setAudioEnabled(false);
+
+        ffmpegOutput.setSubtitleCodec(FFmpegConstants.FFmpegSubtitleCodec.subrip);
+        ffmpegOutput.setSubtitleEnabled(false);
+
+        assertEquals("-ss 9.1 -to 20.1 -t 10.1 -fs 1000 -pass 2" +
+                    " -codec:v libx264 -frames 29.8 -filter:v scale=320:240 -b:v 300000 -qscale:v 22" +
+                    " -codec:a libmp3lame -ar 48000 -ac 6 -b:a 360000 -qscale:a 23 -an" +
+                    " -codec:s subrip -sn" +
+                    " oTest.mp4",
+                ffmpegOutput.buildCommand());
+    }
+
+}
\ No newline at end of file
diff --git a/test/zutil/osal/app/ffmpeg/FFmpegTest.java b/test/zutil/osal/app/ffmpeg/FFmpegTest.java
new file mode 100644
index 0000000..fccf1ce
--- /dev/null
+++ b/test/zutil/osal/app/ffmpeg/FFmpegTest.java
@@ -0,0 +1,63 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Ziver Koc
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+package zutil.osal.app.ffmpeg;
+
+import org.junit.Test;
+import zutil.osal.app.ffmpeg.FFmpegConstants.*;
+
+import static org.junit.Assert.*;
+
+
+public class FFmpegTest {
+
+    @Test
+    public void noArgs() {
+        FFmpeg ffmpeg = new FFmpeg();
+        ffmpeg.addInput(new FFmpegInput("iTest.mp4"));
+        ffmpeg.addOutput(new FFmpegOutput("oTest.mp4"));
+
+        assertEquals("ffmpeg -i iTest.mp4 oTest.mp4", ffmpeg.buildCommand());
+    }
+
+    @Test
+    public void setLogLevel() {
+        FFmpeg ffmpeg = new FFmpeg();
+        ffmpeg.setLogLevel(FFmpegLogLevel.ERROR);
+        ffmpeg.addInput(new FFmpegInput("iTest.mp4"));
+        ffmpeg.addOutput(new FFmpegOutput("oTest.mp4"));
+
+        assertEquals("ffmpeg -loglevel error -i iTest.mp4 oTest.mp4", ffmpeg.buildCommand());
+    }
+
+    @Test
+    public void enableOutputOverwrite() {
+        FFmpeg ffmpeg = new FFmpeg();
+        ffmpeg.enableOutputOverwrite(true);
+        ffmpeg.addInput(new FFmpegInput("iTest.mp4"));
+        ffmpeg.addOutput(new FFmpegOutput("oTest.mp4"));
+
+        assertEquals("ffmpeg -y -i iTest.mp4 oTest.mp4", ffmpeg.buildCommand());
+    }
+}
\ No newline at end of file