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• ffmpeg trouble with NetMaui and Android [closed]

  15 juin 2024, par Billy Vanegas

  I find myself in a following predicament. While I work with Visual Studio 2022, ffmpeg performs flawlessly on Windows platform. However, I'm encountering difficulties when attempting to replicate this functionality on Android. Despite exploring NuGet packages like FFMpegCore, which seem to be ffmpeg wrappers but lack ffmpeg itself, I'm still struggling to find a clear path forward. I've even tried integrating ffmpeg-kit for Android as per the instructions, only to face repeated failures and a sense of confusion. I must admit my puzzlement : why isn't there a straightforward method to seamlessly add ffmpeg to a .NET MAUI project that functions consistently across both iOS and Android platforms ?

  


  I want to convert MP3 files to WAV format using FFmpeg on the Android platform within a .NET MAUI project.

  


  I am using the FFmpegCore library and have downloaded the FFmpeg binaries from the official FFmpeg website. However, I encountered issues when attempting to pass the binary folder on the emulator, when I try to pass it, I get permission denied in working folder :
/data/user/0/com.companyname.projectname/files/ffmpeg on this part of code :

  


           await FFMpegArguments
               .FromFileInput(mp3Path)
               .OutputToFile(wavPath, true, options => options
                   .WithAudioCodec("pcm_s16le")
                   .WithAudioSamplingRate(44100)
                   .WithAudioBitrate(320000)
                   )
               .ProcessAsynchronously();


  


  This is the AndroidManifest.xml

  


  &lt;?xml version="1.0" encoding="utf-8"?>&#xA;<manifest>&#xA;    <application></application>&#xA;    &#xA;    &#xA;    &#xA;    &#xA;</manifest>&#xA;

  


   private async Task ConvertMp3ToWav(string mp3Path, string wavPath)
 {
     try
     {
         var directory = Path.GetDirectoryName(wavPath);
         if (!Directory.Exists(directory))
             Directory.CreateDirectory(directory!);
         if (!File.Exists(wavPath))
             Console.WriteLine($"File not found {wavPath}, creating empty file.");
             using var fs = new FileStream(wavPath, FileMode.CreateNew);
         if (!File.Exists(mp3Path))
             Console.WriteLine($"File not found {mp3Path}");

         string? ffmpegBinaryPath = await ExtractFFmpegBinaries(Platform.AppContext);
         FFMpegCore.GlobalFFOptions.Configure(new FFOptions { BinaryFolder = Path.GetDirectoryName(ffmpegBinaryPath!)! });

         await FFMpegArguments
               .FromFileInput(mp3Path)
               .OutputToFile(wavPath, true, options => options
                   .WithAudioCodec("pcm_s16le")
                   .WithAudioSamplingRate(44100)
                   .WithAudioBitrate(320000)
                   )
               .ProcessAsynchronously();
     }
     catch (Exception ex)
     {
         Console.WriteLine($"An error occurred during the conversion process: {ex.Message}");
         throw;
     }
 }


  


      private async Task<string> ExtractFFmpegBinaries(Context context)&#xA;    {&#xA;        var architectureFolder = "x86"; // "armeabi-v7a";&#xA;        var ffmpegBinaryName = "ffmpeg"; &#xA;        var ffmpegBinaryPath = Path.Combine(context.FilesDir!.AbsolutePath, ffmpegBinaryName);&#xA;        var tempFFMpegFileName = Path.Combine(FileSystem.AppDataDirectory, ffmpegBinaryName);&#xA;&#xA;        if (!File.Exists(ffmpegBinaryPath))&#xA;        {&#xA;            try&#xA;            {&#xA;                var assetPath = $"Libs/{architectureFolder}/{ffmpegBinaryName}";&#xA;                using var assetStream = context.Assets!.Open(assetPath);&#xA;               &#xA;                await using var tempFFMpegFile = File.OpenWrite(tempFFMpegFileName);&#xA;                await assetStream.CopyToAsync(tempFFMpegFile);&#xA;&#xA;                //new MainActivity().RequestStoragePermission();&#xA;                Java.Lang.Runtime.GetRuntime()!.Exec($"chmod 755 {tempFFMpegFileName}");&#xA;            }&#xA;            catch (Exception ex)&#xA;            {&#xA;                Console.WriteLine($"An error occurred while extracting FFmpeg binaries: {ex.Message}");&#xA;                throw;&#xA;            }&#xA;        }&#xA;        else&#xA;        {&#xA;            Console.WriteLine($"FFmpeg binaries already extracted to: {ffmpegBinaryPath}");&#xA;        }&#xA;&#xA;        return tempFFMpegFileName!;&#xA;    }&#xA;</string>

  


• Mix additional audio file with video(+audio) in ffmpeg

  21 mai 2019, par Serg

  I’m trying to mix additional audio file with video which has also audio within. But the problem is that I already have complex ffmpeg command and don’t know how to combine them together.

  This is my existing ffmpeg command which uses some offsets and replaces additional audio file with embedded one (audio inside video) and also overlays few gauges and watermark to the video.

  ffmpeg -y 
  
  -ss 00:00:01:213 -i videoFile.mp4 
  
  -ss 00:00:03:435 -i audioFile.wav 
  
  -i watermark.png 
  
  -framerate 6 -i gauge1_path/img-%04d.png 
  
  -framerate 1 -i gauge2_path/img-%04d.png 
  
  -framerate 2 -i gauge3_path/img-%04d.png 
  
  -framerate 2 -i gauge4_path/img-%04d.png 
  
  -framerate 2 -i gauge5_path/img-%04d.png 
  
  -framerate 2 -i gauge6_path/img-%04d.png 
  
  -filter_complex [0][2]overlay=(21):(H-h-21)[ovr0];
  
  [ovr0][3]overlay=(W-w-21):(H-h-21)[ovr1];
  
  [ovr1][4]overlay=(W-w-21):(H-h-333)[ovr2];
  
  [ovr2][5]overlay=(W-w-21):(H-h-418)[ovr3];
  
  [ovr3][6]overlay=(W-w-21):(H-h-503)[ovr4];
  
  [ovr4][7]overlay=(W-w-21):(H-h-588)[ovr5];
  
  [ovr5][8]overlay=(W-w-21):(H-h-673)
  
  -map 0:v -map 1:a -c:v libx264 -preset ultrafast -crf 23 -t 00:5:10:000 output.mp4

  Now I would like to use ffmpeg's amix in order to mix both audios instead of replacing them, if possible with ability to set volumes. But official documentation amix says nothing about volume.

  Separately both seems to work ok.

  ffmpeg -y -i video.mp4 -i audio.mp3 -filter_complex [0][1]amix=inputs=2[a] -map 0:v -map [a] -c:v copy output.mp4

  and

  ffmpeg -y -i video.mp4 -i audio.mp3 -i watermark.png -filter_complex [0][2]overlay=(21):(H-h-21)[ovr0] -map [ovr0]:v -map 1:a -c:v libx264 -preset ultrafast -crf 23 output.mp4

  but together

  ffmpeg -y -i video.mp4 -i audio.mp3 -i watermark.png -filter_complex [0][1]amix=inputs=2[a];[a][2]overlay=(21):(H-h-21)[ovr0] -map [ovr0]:v -map [a] -c:v libx264 -preset ultrafast -crf 23 output.mp4

  I’m getting an error :

  ffmpeg version N-93886-gfbdb3aa179 Copyright (c) 2000-2019 the FFmpeg developers
  
    built with gcc 8.3.1 (GCC) 20190414
  
    configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt
  
    libavutil      56. 28.100 / 56. 28.100
  
    libavcodec     58. 52.101 / 58. 52.101
  
    libavformat    58. 27.103 / 58. 27.103
  
    libavdevice    58.  7.100 / 58.  7.100
  
    libavfilter     7. 53.101 /  7. 53.101
  
    libswscale      5.  4.101 /  5.  4.101
  
    libswresample   3.  4.100 /  3.  4.100
  
    libpostproc    55.  4.100 / 55.  4.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      creation_time   : 1970-01-01T00:00:00.000000Z
  
      encoder         : Lavf53.24.2
  
    Duration: 00:00:29.57, start: 0.000000, bitrate: 1421 kb/s
  
      Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 1032 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
      Metadata:
  
        creation_time   : 1970-01-01T00:00:00.000000Z
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 383 kb/s (default)
  
      Metadata:
  
        creation_time   : 1970-01-01T00:00:00.000000Z
  
        handler_name    : SoundHandler
  
  [mp3 @ 0000015e2f934ec0] Estimating duration from bitrate, this may be inaccurate
  
  Input #1, mp3, from 'audio.mp3':
  
    Duration: 00:00:45.33, start: 0.000000, bitrate: 128 kb/s
  
      Stream #1:0: Audio: mp3, 44100 Hz, stereo, fltp, 128 kb/s
  
  Input #2, png_pipe, from 'watermark.png':
  
    Duration: N/A, bitrate: N/A
  
      Stream #2:0: Video: png, rgb24(pc), 100x56 [SAR 3779:3779 DAR 25:14], 25 tbr, 25 tbn, 25 tbc
  
  [Parsed_amix_0 @ 0000015e2ff2e940] Media type mismatch between the 'Parsed_amix_0' filter output pad 0 (audio) and the 'Parsed_overlay_1' filter input pad 0 (video)
  
  [AVFilterGraph @ 0000015e2f91c600] Cannot create the link amix:0 -> overlay:0
  
  Error initializing complex filters.
  
  Invalid argument

  So my question : whether it’s possible to combine amix and overlay together and how and in which order they should be used ? Or should I look something different because amix unable to set volume levels ?

  Thanks in advance !

• How to compile a static FFmpeg binary on OS X

  29 juillet 2014, par Chitanda_Eru

  I want to compile a static ffmpeg binary by myself. I follow this guide, and then built one successfully.

  ./configure --extra-version=Chitanda_Eru --prefix=/Volumes/Chitanda_Eru/ --enable-gpl --enable-version3 --enable-nonfree --disable-shared --enable-static --enable-ffplay --disable-ffserver --enable-pthreads --enable-avisynth --enable-libvo-aacenc --enable-libfaac --enable-libfdk-aac --enable-libmp3lame --enable-libvorbis --enable-libx264 --enable-libx265 --enable-libxvid --enable-libbluray --enable-libtheora --enable-libcelt --enable-openssl --enable-libspeex --enable-postproc --enable-libvpx --enable-libgsm --enable-libopenjpeg --enable-libopus --enable-fontconfig --enable-libfreetype --enable-libass --enable-filters --disable-indev=qtkit --enable-runtime-cpudetect --enable-bzlib --enable-zlib --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvo-amrwbenc --enable-libtwolame --enable-openal --enable-libsoxr --enable-libwavpack --enable-libvidstab --enable-libilbc --enable-libschroedinger --enable-libcaca --enable-opengl --enable-frei0r --enable-libquvi

  But I come across a problem, the FFmpeg binary is only 15.5MB which is much smaller than the official builds, what’s more, it can’t work on my second Mac and with errors below.

  Library not loaded: /usr/local/lib/libx264.142.dylib
  
    Referenced from: /Applications/CLI/ffmpeg
  
    Reason: image not found
  
  Trace/BPT trap: 5

  And then I use otool command to see what the dynamic libraries ffmpeg rely on.

  otool -L /Applications/CLI/ffmpeg | grep local
  
  
  
      /usr/local/lib/libSDL-1.2.0.dylib (compatibility version 12.0.0, current version 12.4.0)
  
      /usr/local/lib/libx265.25.dylib (compatibility version 25.0.0, current version 1.2.0)
  
      /usr/local/lib/libx264.142.dylib (compatibility version 0.0.0, current version 0.0.0)
  
      /usr/local/lib/libvorbisenc.2.dylib (compatibility version 3.0.0, current version 3.10.0)
  
      /usr/local/lib/libvorbis.0.dylib (compatibility version 5.0.0, current version 5.7.0)
  
      /usr/local/lib/libogg.0.dylib (compatibility version 9.0.0, current version 9.2.0)
  
      /usr/local/lib/libvo-aacenc.0.dylib (compatibility version 1.0.0, current version 1.3.0)
  
      /usr/local/lib/libvidstab.0.9.dylib (compatibility version 0.9.0, current version 0.0.0)
  
      /usr/local/lib/libtheoraenc.1.dylib (compatibility version 3.0.0, current version 3.2.0)
  
      /usr/local/lib/libtheoradec.1.dylib (compatibility version 3.0.0, current version 3.4.0)
  
      /usr/local/lib/libspeex.1.dylib (compatibility version 7.0.0, current version 7.0.0)
  
      /usr/local/lib/libquvi.7.dylib (compatibility version 8.0.0, current version 8.1.0)
  
      /usr/local/lib/libopus.0.dylib (compatibility version 6.0.0, current version 6.0.0)
  
      /usr/local/lib/libopenjpeg.1.dylib (compatibility version 7.0.0, current version 7.0.0)
  
      /usr/local/lib/libopencore-amrwb.0.dylib (compatibility version 1.0.0, current version 1.3.0)
  
      /usr/local/lib/libopencore-amrnb.0.dylib (compatibility version 1.0.0, current version 1.3.0)
  
      /usr/local/lib/libmp3lame.0.dylib (compatibility version 1.0.0, current version 1.0.0)
  
      /usr/local/lib/libgsm.1.0.13.dylib (compatibility version 1.0.0, current version 1.0.13)
  
      /usr/local/lib/libfreetype.6.dylib (compatibility version 18.0.0, current version 18.2.0)
  
      /usr/local/lib/libfontconfig.1.dylib (compatibility version 10.0.0, current version 10.0.0)
  
      /usr/local/lib/libfdk-aac.0.dylib (compatibility version 1.0.0, current version 1.4.0)
  
      /usr/local/lib/libfaac.0.0.0.dylib (compatibility version 1.0.0, current version 1.0.0)
  
      /usr/local/lib/libcaca.0.dylib (compatibility version 100.0.0, current version 100.19.0)
  
      /usr/local/lib/libcelt0.2.dylib (compatibility version 3.0.0, current version 3.0.0)
  
      /usr/local/lib/libbluray.1.dylib (compatibility version 8.0.0, current version 8.0.0)
  
      /usr/local/lib/libass.5.dylib (compatibility version 6.0.0, current version 6.0.0)

  Most of my packages are installed by Homebrew, and Homebrew will install them with "—enable-static —enable-shared". And my guess is : when I compile ffmpeg, ffmpeg rather use the dynamic libraries than the static libraries, so the binary won’t work on other Macs.How can I build a static binary of ffmpeg ? Thanks.

  update : I successfully build static ffmpeg after moving all the dylibs which have static libraries as well to other dictionary and disable all the libraries that ./configure can’t find.

  ./configure --extra-version=Chitanda_Eru --prefix=/Volumes/Chitanda_Eru/ --enable-gpl --enable-version3 --enable-nonfree --disable-shared --enable-static --enable-ffplay --disable-ffserver --enable-pthreads --enable-avisynth --enable-libvo-aacenc --enable-libfaac --enable-libfdk-aac --enable-libmp3lame --enable-libvorbis --enable-libx264 --enable-libxvid --enable-libtheora --enable-libcelt --enable-openssl --enable-libspeex --enable-postproc --enable-libvpx --enable-libgsm --enable-libopenjpeg --enable-filters --disable-indev=qtkit --enable-runtime-cpudetect --enable-bzlib --enable-zlib --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvo-amrwbenc --enable-libtwolame --enable-libsoxr --enable-libwavpack --enable-libilbc --enable-opengl --enable-frei0r