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• Using ffmpeg to convert sound files for use in an android app

  10 janvier 2012, par stefs

  short : i'm trying to simply play a sound file converted with ffmpeg in my android app, but happen to have problems getting it to work.

  long : we have an iphone app and an android app doing the same thing, and i have to port the feature playing a sound on an user interaction. i have the source file in the aiff format, and tried to convert it to mp3 for android. but the app keeps crashing when it tries to load the file

  AssetFileDescriptor fileDescriptor = context.getResources().openRawResourceFd(resid);
  
  final MediaPlayer mp = new MediaPlayer();
  
  mp.setDataSource(fileDescriptor.getFileDescriptor(), fileDescriptor.getStartOffset(), fileDescriptor.getLength());
  
  fileDescriptor.close();
  
  mp.prepare();

  more specifically, mp.setDataSource crashes. some digging around led me to believe that something's wrong with the encoding. the sound file itself resides in res/raw.

  11-29 17:11:48.012: ERROR/SoundManager(15580): java.io.IOException: setDataSourceFD failed.: status=0x80000000
  
  11-29 17:11:48.012: ERROR/SoundManager(15580):     at android.media.MediaPlayer.setDataSource(Native Method)
  
  ...

  what i tried :

  • using a different mp3 that's already used with the same code in a different place. this works.
  • converted it to wav file. this didn't cause the app to crash, but it neither played a sound. that might be a different problem.
  • converted it to ogg ; crashed

  so, the the ffmpeg conversion parameters are as follows :

  $ ffmpeg -i click_24db.aif -f mp3 ~/foobar/wheel_click.mp3
  
  ffmpeg version 0.7.8, Copyright (c) 2000-2011 the FFmpeg developers
  
    built on Nov 24 2011 14:31:00 with gcc 4.2.1 (Apple Inc. build 5666) (dot 3)
  
    configuration: --prefix=/opt/local --enable-gpl --enable-postproc --enable-swscale --enable-avfilter --enable-libmp3lame --enable-libvorbis --enable-libtheora --enable-libdirac --enable-libschroedinger --enable-libopenjpeg --enable-libxvid --enable-libx264 --enable-libvpx --enable-libspeex --mandir=/opt/local/share/man --enable-shared --enable-pthreads --cc=/usr/bin/gcc-4.2 --arch=x86_64 --enable-yasm
  
    libavutil    50. 43. 0 / 50. 43. 0
  
    libavcodec   52.123. 0 / 52.123. 0
  
    libavformat  52.111. 0 / 52.111. 0
  
    libavdevice  52.  5. 0 / 52.  5. 0
  
    libavfilter   1. 80. 0 /  1. 80. 0
  
    libswscale    0. 14. 1 /  0. 14. 1
  
    libpostproc  51.  2. 0 / 51.  2. 0
  
  Input #0, aiff, from 'click_24db.aif':
  
    Duration: 00:00:00.01, start: 0.000000, bitrate: 1570 kb/s
  
      Stream #0.0: Audio: pcm_s16be, 44100 Hz, 2 channels, s16, 1411 kb/s
  
  Output #0, mp3, to '/Users/xyz/foobar/wheel_click.mp3':
  
    Metadata:
  
      TSSE            : Lavf52.111.0
  
      Stream #0.0: Audio: libmp3lame, 44100 Hz, 2 channels, s16, 64 kb/s
  
  Stream mapping:
  
    Stream #0.0 -> #0.0
  
  Press [q] to stop, [?] for help
  
  size=       1kB time=00:00:00.05 bitrate=  92.9kbits/s    
  
  video:0kB audio:0kB global headers:0kB muxing overhead 45.563549%

  the resulting file plays nice in itunes, does not play in vlc and crashes when loaded with the android.media.MediaPlayer (note : i first tried it with the SoundPool lib, with both mp3 and ogg, but that didn't work either).

  i also tried the following paramters, which didn't work :

  ffmpeg -i inputfile.aif -f mp3 -acodec libmp3lame -ab 192000 -ar 44100 outputfile.mp3

  i'm working on osx, built ffmpeg with macports today, android api level is 7 (google api, 2.1-update1). looking at the "supported formats" table on dev.android didn't indicate my file to be out of the spec, but i may be mistaken in that.

  i don't have the slightest clue regarding bitrates and so on, so could anybody please point me to the right combination of ffmpeg parameters to get a working mp3 for android ? i don't care if the resulting file would be mp3, ogg or 3gp or whatever.

• avcodec : add external enc libvvenc for H266/VVC

  5 juin 2024, par Thomas Siedel

  avcodec : add external enc libvvenc for H266/VVC
  Add external encoder VVenC for H266/VVC encoding.
  
  Register new encoder libvvenc.
  
  Add libvvenc to wrap the vvenc interface.
  
  libvvenc implements encoder option : preset,qp,qpa,period,
  
  passlogfile,stats,vvenc-params,level,tier.
  
  Enable encoder by adding —enable-libvvenc in configure step.
  Co-authored-by : Christian Bartnik chris10317h5@gmail.com
  
  Signed-off-by : Thomas Siedel <thomas.ff@spin-digital.com>
  

  • [DH] Changelog
  • [DH] configure
  • [DH] doc/encoders.texi
  • [DH] fftools/ffmpeg_mux_init.c
  • [DH] libavcodec/Makefile
  • [DH] libavcodec/allcodecs.c
  • [DH] libavcodec/libvvenc.c
  • [DH] libavcodec/version.h

• avformat/mpegts : add ts stream types for H266/VVC

  30 janvier 2024, par Thomas Siedel

  avformat/mpegts : add ts stream types for H266/VVC
  Add transport stream stream type 0x33 for vvc.
  
  Add STREAM_TYPE_VIDEO_VVC to MPEG-1/2 and MPEG-2 transport stream.
  
  Add basic transport stream support for TS mux/demux.
  Tested with :
  
  ffmpeg -i NovosobornayaSquare_1920x1080.mp4 -c:v libvvenc test.ts && ffmpeg -i test.ts -f null -
  
  ffmpeg -i NovosobornayaSquare_1920x1080.mp4 -c:v copy test.ts     && ffmpeg -i test.ts -f md5 -
  Signed-off-by : Marton Balint <cus@passwd.hu>
  
  Signed-off-by : Thomas Siedel <thomas.ff@spin-digital.com>
  
  Co-Authored-By : Nuo Mi <nuomi2021@gmail.com>
  

  • [DH] configure
  • [DH] libavformat/mpeg.c
  • [DH] libavformat/mpeg.h
  • [DH] libavformat/mpegts.c
  • [DH] libavformat/mpegts.h
  • [DH] libavformat/mpegtsenc.c