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• ffmpeg - how can i create a bash loop to convert mkv files to mp4

  7 septembre 2017, par Brandon Emmanuel Niebla Sandov

  Hello i designed a command that allow me to convert mkv files with multi audio track and subtitles to mp4 files conserving all video tracks and subtitles

  now i want to make a bash loop to convert a whole directory but the bash i made didnt work

  #!/bin/bash
  
  for t in *.mkv  
  
  do
  
  name=$(basename -s .mkv "$t")
  
  ffmpeg –I "$t" -map 0 -c:a aac -strict -2 -c:s mov_text "$name.mp4"
  
  done

  the terminal its throwing me this results

      ffmpeg version N-75193-gf855353-Xtream-Codes Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)
  
    configuration: --prefix=/root/FFmpeg/target --extra-cflags='-I/root/FFmpeg/target/include -static' --extra-ldflags='-L/root/FFmpeg/target/lib -lm -static' --extra-version=Xtream-Codes --disable-debug --disable-shared --enable-libx265 --enable-static --extra-cflags=--static --disable-ffplay --disable-ffserver --disable-doc --enable-librtmp --enable-gpl --enable-pthreads --enable-postproc --enable-libass --enable-gray --enable-runtime-cpudetect --enable-gnutls --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --enable-bzlib --enable-zlib --enable-version3 --enable-libvpx --enable-libxavs --disable-devices --extra-libs='-lrtmp -lnettle -lhogweed -lgmp -lssl -lcrypto -lz -lc -ldl'
  
    libavutil      55.  2.100 / 55.  2.100
  
    libavcodec     57.  1.100 / 57.  1.100
  
    libavformat    57.  0.100 / 57.  0.100
  
    libavdevice    57.  0.100 / 57.  0.100
  
    libavfilter     6.  1.100 /  6.  1.100
  
    libswscale      4.  0.100 /  4.  0.100
  
    libswresample   2.  0.100 /  2.  0.100
  
    libpostproc    54.  0.100 / 54.  0.100
  
  [NULL @ 0x2f89a20] Unable to find a suitable output format for '–I'
  
  –I: Invalid argument
  
  ffmpeg version N-75193-gf855353-Xtream-Codes Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)
  
    configuration: --prefix=/root/FFmpeg/target --extra-cflags='-I/root/FFmpeg/target/include -static' --extra-ldflags='-L/root/FFmpeg/target/lib -lm -static' --extra-version=Xtream-Codes --disable-debug --disable-shared --enable-libx265 --enable-static --extra-cflags=--static --disable-ffplay --disable-ffserver --disable-doc --enable-librtmp --enable-gpl --enable-pthreads --enable-postproc --enable-libass --enable-gray --enable-runtime-cpudetect --enable-gnutls --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --enable-bzlib --enable-zlib --enable-version3 --enable-libvpx --enable-libxavs --disable-devices --extra-libs='-lrtmp -lnettle -lhogweed -lgmp -lssl -lcrypto -lz -lc -ldl'
  
    libavutil      55.  2.100 / 55.  2.100
  
    libavcodec     57.  1.100 / 57.  1.100
  
    libavformat    57.  0.100 / 57.  0.100
  
    libavdevice    57.  0.100 / 57.  0.100
  
    libavfilter     6.  1.100 /  6.  1.100
  
    libswscale      4.  0.100 /  4.  0.100
  
    libswresample   2.  0.100 /  2.  0.100
  
    libpostproc    54.  0.100 / 54.  0.100
  
  [NULL @ 0x5e25fe0] Unable to find a suitable output format for '–I'
  
  –I: Invalid argument

  what do you suggest me to change to my command
  this is the original command

  ffmpeg -i INPUT.mkv -map 0 -c:a aac -strict -2 -c:s mov_text OUTPUT.mp4

• trouble compiling ffmpeg library and converter class

  24 février 2013, par user2104126

  I am using this project as a reference : The code is avaiable at http://roman10.net/src/affmpeg.zip.

  I am trying to compile this project with ffmpeg with different configuration than the project suggests.
  I've compiled a new libffmpeg.so and added it to the project.
  However, now i'm getting an "UnsatisfiedLinkError"

  02-24 11:05:45.644: D/dalvikvm(11363): Trying to load lib /data/data/roman10.media.ffmpeg/lib/libffmpeg.so 0x47b0ec70
  
  02-24 11:05:45.680: D/dalvikvm(11363): Added shared lib /data/data/roman10.media.ffmpeg/lib/libffmpeg.so 0x47b0ec70
  
  02-24 11:05:45.680: D/dalvikvm(11363): No JNI_OnLoad found in /data/data/roman10.media.ffmpeg/lib/libffmpeg.so 0x47b0ec70, skipping init
  
  02-24 11:05:45.684: D/dalvikvm(11363): Trying to load lib /data/data/roman10.media.ffmpeg/lib/libconverter.so 0x47b0ec70
  
  02-24 11:05:45.687: I/dalvikvm(11363): Unable to dlopen(/data/data/roman10.media.ffmpeg/lib/libconverter.so): Cannot load library: link_image[1995]: failed to link libconverter.so
  
  02-24 11:05:45.687: W/dalvikvm(11363): Exception Ljava/lang/UnsatisfiedLinkError; thrown during Lroman10/media/ffmpeg/ffmpegService;.<clinit>
  
  02-24 11:05:45.687: W/dalvikvm(11363): Class init failed in newInstance call (Lroman10/media/ffmpeg/ffmpegService;)
  
  02-24 11:05:45.687: D/AndroidRuntime(11363): Shutting down VM
  
  02-24 11:05:45.687: W/dalvikvm(11363): threadid=1: thread exiting with uncaught exception (group=0x4001d7d0)
  
  02-24 11:05:45.695: E/AndroidRuntime(11363): FATAL EXCEPTION: main
  
  02-24 11:05:45.695: E/AndroidRuntime(11363): java.lang.ExceptionInInitializerError
  
  02-24 11:05:45.695: E/AndroidRuntime(11363):    at java.lang.Class.newInstanceImpl(Native Method)
  
  02-24 11:05:45.695: E/AndroidRuntime(11363):    at java.lang.Class.newInstance(Class.java:1429)
  
  02-24 11:05:45.695: E/AndroidRuntime(11363):    at android.app.ActivityThread.handleCreateService(ActivityThread.java:2940)
  
  02-24 11:05:45.695: E/AndroidRuntime(11363):    at android.app.ActivityThread.access$3300(ActivityThread.java:125)
  
  02-24 11:05:45.695: E/AndroidRuntime(11363):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2087)
  
  02-24 11:05:45.695: E/AndroidRuntime(11363):    at android.os.Handler.dispatchMessage(Handler.java:99)
  
  02-24 11:05:45.695: E/AndroidRuntime(11363):    at android.os.Looper.loop(Looper.java:123)
  
  02-24 11:05:45.695: E/AndroidRuntime(11363):    at android.app.ActivityThread.main(ActivityThread.java:4627)
  
  02-24 11:05:45.695: E/AndroidRuntime(11363):    at java.lang.reflect.Method.invokeNative(Native Method)
  
  02-24 11:05:45.695: E/AndroidRuntime(11363):    at java.lang.reflect.Method.invoke(Method.java:521)
  
  02-24 11:05:45.695: E/AndroidRuntime(11363):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:871)
  
  02-24 11:05:45.695: E/AndroidRuntime(11363):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:629)
  
  02-24 11:05:45.695: E/AndroidRuntime(11363):    at dalvik.system.NativeStart.main(Native Method)
  
  02-24 11:05:45.695: E/AndroidRuntime(11363): Caused by: java.lang.UnsatisfiedLinkError: Library converter not found
  
  02-24 11:05:45.695: E/AndroidRuntime(11363):    at java.lang.Runtime.loadLibrary(Runtime.java:461)
  
  02-24 11:05:45.695: E/AndroidRuntime(11363):    at java.lang.System.loadLibrary(System.java:557)
  
  02-24 11:05:45.695: E/AndroidRuntime(11363):    at roman10.media.ffmpeg.ffmpegService.<clinit>(ffmpegService.java:123)
  
  </clinit></clinit>

  I decided to recompile the converter.so file
  however, when running the ndk-build command on it, i receive these messages :

  c:\Users\user\workspace\Main\jni>c:\work\android-ndk-r8d\ndk-build
  
  c:/android-ndk-r8d/build/core/build-binary.mk:266: warning: overriding comm
  
  ands for target `c:/Users/user/workspace/Main//obj/local/armeabi/objs/converter'
  
  
  
  c:/android-ndk-r8d/build/core/build-binary.mk:266: warning: ignoring old co
  
  mmands for target `c:/Users/user/workspace/Main//obj/local/armeabi/objs/converte
  
  r'
  
  c:/android-ndk-r8d/build/core/build-binary.mk:266: warning: overriding comm
  
  ands for target `c:/Users/user/workspace/Main//obj/local/armeabi/objs/converter'
  
  
  
  c:/android-ndk-r8d/build/core/build-binary.mk:266: warning: ignoring old co
  
  mmands for target `c:/Users/user/workspace/Main//obj/local/armeabi/objs/converte
  
  r'
  
  c:/android-ndk-r8d/build/core/build-binary.mk:357: warning: overriding comm
  
  ands for target `c:/Users/user/workspace/Main//obj/local/armeabi'
  
  c:/android-ndk-r8d/build/core/build-binary.mk:357: warning: ignoring old co
  
  mmands for target `c:/Users/user/workspace/Main//obj/local/armeabi'
  
  c:/android-ndk-r8d/build/core/build-binary.mk:439: warning: overriding comm
  
  ands for target `c:/Users/user/workspace/Main//libs/armeabi'
  
  c:/android-ndk-r8d/build/core/build-binary.mk:439: warning: ignoring old co
  
  mmands for target `c:/Users/user/workspace/Main//libs/armeabi'
  
  c:/android-ndk-r8d/build/core/build-binary.mk:357: warning: overriding comm
  
  ands for target `c:/Users/user/workspace/Main//obj/local/armeabi'
  
  c:/android-ndk-r8d/build/core/build-binary.mk:357: warning: ignoring old co
  
  mmands for target `c:/Users/user/workspace/Main//obj/local/armeabi'
  
  "Compile thumb : converter <= cmdutils.c
  
  c:/Users/user/workspace/Main//jni/cmdutils.c:32:34: fatal error: libavformat/avf
  
  ormat.h: No such file or directory
  
  compilation terminated.
  
  make: *** [c:/Users/user/workspace/Main//obj/local/armeabi/objs/converter/cmduti
  
  ls.o] Error 1

  What can I do to fix this, and make it work ?

• Files such as libavcodec.so of the Unreal ffmpeg library cannot be packaged into the APK

  26 décembre 2023, par user1875144

  I currently use Unreal 4.23.1 to develop Android system programs. I currently use the ffmpeg library to dynamically convert the sampling rate of sound. I add the relevant SO libraries to my Build.cs code. I use UE to package the Android APK program.
There is no problem with packaging, but the SO file cannot be packaged into the APK file, which causes the Android system to crash as soon as I run it. Has anyone encountered such a problem ? The programming language I use is C++
Below is the code in my build.cs file

  


  using UnrealBuildTool;
using System.IO;
using System;

public class MIC : ModuleRules
{
    public MIC(ReadOnlyTargetRules Target) : base(Target)
    {
        PCHUsage = PCHUsageMode.UseExplicitOrSharedPCHs;

        PublicDependencyModuleNames.AddRange(new string[] { "Core", "CoreUObject", "Engine", "InputCore", "HeadMountedDisplay", "AudioCapture", "AudioMixer", "WebSockets", "Json", "JsonUtilities", "MediaAssets", "Voice","OnlineSubsystem"});
        
        string ThirdPartyPath = Path.Combine(ModuleDirectory, "../../ThirdParty/ffmpeg");
        string LibrariesPath = Path.Combine(ThirdPartyPath, "lib");
        string BinariesPath = Path.Combine(ModuleDirectory, "../../Binaries/Win64");

        PublicIncludePaths.Add(Path.Combine(ThirdPartyPath, "include"));

        // 根据目标平台加载相应的库文件
        if (Target.Platform == UnrealTargetPlatform.Win64)
        {
            // Windows 使用的库和 DLL 文件
            PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "avcodec.lib"));
            PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "avformat.lib"));
            PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "avutil.lib"));
            PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "swresample.lib"));
            PublicAdditionalLibraries.Add(Path.Combine(LibrariesPath, "swscale.lib"));

            PublicDelayLoadDLLs.Add("avcodec-58.dll");
            PublicDelayLoadDLLs.Add("avformat-58.dll");
            PublicDelayLoadDLLs.Add("avutil-56.dll");
            PublicDelayLoadDLLs.Add("swresample-3.dll");
            PublicDelayLoadDLLs.Add("swscale-5.dll");

            if (!Directory.Exists(BinariesPath))
            {
                Directory.CreateDirectory(BinariesPath);
            }

            string[] DllNames = { "avcodec-58.dll", "avformat-58.dll", "avutil-56.dll", "swresample-3.dll", "swscale-5.dll" };
            foreach (string DllName in DllNames)
            {
                string SourcePath = Path.Combine(LibrariesPath, DllName);
                string DestinationPath = Path.Combine(BinariesPath, DllName);

                if (File.Exists(SourcePath))
                {
                    File.Copy(SourcePath, DestinationPath, true);
                }
            }

            foreach (string DllName in DllNames)
            {
                RuntimeDependencies.Add(Path.Combine(BinariesPath, DllName));
            }
        }
        else if (Target.Platform == UnrealTargetPlatform.Android)
        {
            // Android 使用的 SO 文件
            string AndroidLibrariesPath = Path.Combine(LibrariesPath, "android", "armeabi-v7a");
            PublicAdditionalLibraries.Add(Path.Combine(AndroidLibrariesPath, "libavcodec.so"));
            PublicAdditionalLibraries.Add(Path.Combine(AndroidLibrariesPath, "libavformat.so"));
            PublicAdditionalLibraries.Add(Path.Combine(AndroidLibrariesPath, "libavutil.so"));
            PublicAdditionalLibraries.Add(Path.Combine(AndroidLibrariesPath, "libswresample.so"));
            PublicAdditionalLibraries.Add(Path.Combine(AndroidLibrariesPath, "libswscale.so"));

            // 这里修改为动态加载 OnlineSubsystemGooglePlay
            DynamicallyLoadedModuleNames.Add("OnlineSubsystemGooglePlay");
            // 可能还需要保留对其他模块的私有依赖
            PrivateDependencyModuleNames.Add("OnlineSubsystem");
            //PrivateDependencyModuleNames.Add("AndroidAdvertising");
        }

        // 其他配置保持不变
    }
}