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• FFmpeg from Python has Corrupted Output

  14 juillet 2019, par Mazyod

  In a python script, I have :

  os.system(ff_cmd)
  
  # also tried Popen(ff_cmd, shell=True).wait()

  Then, I ran that same ff_cmd from terminal directly. Here are the results :

  # ff_cmd
  
  ffmpeg -i "114006.mp3" -acodec pcm_s16le -ar 16000 -ac 1 "114-006-a4dec52a.wav"
  
  
  
  # after running from python
  
  % file 114-006-a4dec52a.wav
  
  114-006-a4dec52a.wav: Audio file with ID3 version 2.4.0, contains:MPEG ADTS, layer III, v2,  40 kbps, 16 kHz, Monaural
  
  
  
  # after running from terminal
  
  % file 114-006-a4dec52a.wav
  
  114-006-a4dec52a.wav: RIFF (little-endian) data, WAVE audio, Microsoft PCM, 16 bit, mono 16000 Hz

  Can anyone please explain why in the world would they result in different outputs ?

  ---

  Output from Python :

  ffmpeg version 4.1.4 Copyright (c) 2000-2019 the FFmpeg developers
  
    built with Apple LLVM version 10.0.1 (clang-1001.0.46.4)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/4.1.4 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags='-I/Library/Java/JavaVirtualMachines/adoptopenjdk-12.0.1.jdk/Contents/Home/include -I/Library/Java/JavaVirtualMachines/adoptopenjdk-12.0.1.jdk/Contents/Home/include/darwin' --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libmp3lame --enable-libopus --enable-librubberband --enable-libsnappy --enable-libtesseract --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-videotoolbox --disable-libjack --disable-indev=jack --enable-libaom --enable-libsoxr
  
    libavutil      56. 22.100 / 56. 22.100
  
    libavcodec     58. 35.100 / 58. 35.100
  
    libavformat    58. 20.100 / 58. 20.100
  
    libavdevice    58.  5.100 / 58.  5.100
  
    libavfilter     7. 40.101 /  7. 40.101
  
    libavresample   4.  0.  0 /  4.  0.  0
  
    libswscale      5.  3.100 /  5.  3.100
  
    libswresample   3.  3.100 /  3.  3.100
  
    libpostproc    55.  3.100 / 55.  3.100
  
  [mp3 @ 0x7ffa34001800] Estimating duration from bitrate, this may be inaccurate
  
  Input #0, mp3, from '/.../114006.mp3':
  
    Duration: 00:00:09.53, start: 0.000000, bitrate: 64 kb/s
  
      Stream #0:0: Audio: mp3, 22050 Hz, stereo, fltp, 64 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mp3 (mp3float) -> pcm_s16le (native))
  
  Press [q] to stop, [?] for help
  
  Output #0, wav, to '/.../114-006-a4dec52a.wav':
  
    Metadata:
  
      ISFT            : Lavf58.20.100
  
      Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 16000 Hz, mono, s16, 256 kb/s
  
      Metadata:
  
        encoder         : Lavc58.35.100 pcm_s16le
  
  size=     298kB time=00:00:09.53 bitrate= 256.1kbits/s speed= 166x    
  
  video:0kB audio:298kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.025564%

  Output from terminal :

  ffmpeg version 4.1.4 Copyright (c) 2000-2019 the FFmpeg developers
  
    built with Apple LLVM version 10.0.1 (clang-1001.0.46.4)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/4.1.4 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags='-I/Library/Java/JavaVirtualMachines/adoptopenjdk-12.0.1.jdk/Contents/Home/include -I/Library/Java/JavaVirtualMachines/adoptopenjdk-12.0.1.jdk/Contents/Home/include/darwin' --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libmp3lame --enable-libopus --enable-librubberband --enable-libsnappy --enable-libtesseract --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-videotoolbox --disable-libjack --disable-indev=jack --enable-libaom --enable-libsoxr
  
    libavutil      56. 22.100 / 56. 22.100
  
    libavcodec     58. 35.100 / 58. 35.100
  
    libavformat    58. 20.100 / 58. 20.100
  
    libavdevice    58.  5.100 / 58.  5.100
  
    libavfilter     7. 40.101 /  7. 40.101
  
    libavresample   4.  0.  0 /  4.  0.  0
  
    libswscale      5.  3.100 /  5.  3.100
  
    libswresample   3.  3.100 /  3.  3.100
  
    libpostproc    55.  3.100 / 55.  3.100
  
  [mp3 @ 0x7f98ed005800] Estimating duration from bitrate, this may be inaccurate
  
  Input #0, mp3, from '/.../114006.mp3':
  
    Duration: 00:00:09.53, start: 0.000000, bitrate: 64 kb/s
  
      Stream #0:0: Audio: mp3, 22050 Hz, stereo, fltp, 64 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mp3 (mp3float) -> pcm_s16le (native))
  
  Press [q] to stop, [?] for help
  
  Output #0, wav, to '/.../114-006-a4dec52a.wav':
  
    Metadata:
  
      ISFT            : Lavf58.20.100
  
      Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 16000 Hz, mono, s16, 256 kb/s
  
      Metadata:
  
        encoder         : Lavc58.35.100 pcm_s16le
  
  size=     298kB time=00:00:09.53 bitrate= 256.1kbits/s speed= 469x    
  
  video:0kB audio:298kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.025564%

• MPD doesnt load ffmpeg as decoder

  10 août 2022, par dmSherazi

  I am using openwrt 21.2.3 and mpd on it. I have compile mpd full and libffmpeg full as well as ffmpeg-full packages.
But my mpd wont load ffmpeg as decoder. Also tried to force it by adding decoder { plugin “ffmpeg” enabled “no” }” line to /etc/mpd.conf

  


  below is my mpd.conf

  


  log_file "syslog"

bind_to_address "127.0.0.1"
bind_to_address "192.168.1.16"

input {
    plugin          "curl"
}

audio_output {
    type            "alsa"
    name            "sun4icodec"
    device          "plug:dmix"
    mixer_control   "Power Amplifier"
}

decoder {
     plugin  "ffmpeg"
     enabled  "yes"
}


  


  the mpd —version output is as follows

  


  Music Player Daemon 0.21.26 (v21.02.3)
Copyright 2003-2007 Warren Dukes <warren.dukes@gmail.com>
Copyright 2008-2018 Max Kellermann <max.kellermann@gmail.com>
This is free software; see the source for copying conditions.  There is NO
warranty; not even MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Database plugins:
 simple proxy upnp

Storage plugins:
 local curl


Decoders plugins:
 [mad] mp3 mp2
 [vorbis] ogg oga
 [oggflac] ogg oga
 [flac] flac
 [opus] opus ogg oga
 [faad] aac
 [pcm]

Filters:


Tag plugins:
 id3tag

Output plugins:
 shout null fifo pipe alsa pulse httpd recorder

Encoder plugins:
 null opus wave flac

Input plugins:
 file alsa curl mms

Playlist plugins:
 extm3u m3u pls xspf asx rss soundcloud flac cue embcue

Protocols:
 file:// alsa:// http:// https:// mms:// mmsh:// mmst:// mmsu://

Other features:
 epoll iconv inotify ipv6 tcp un


  


  ideally it should have something like this

  


  
Decoders plugins:
 [dsdiff] dff
 [dsf] dsf
 [ffmpeg] 16sv 3g2 3gp 4xm 8svx aa3 aac ac3 adx afc aif aifc aiff al alaw amr anim apc ape asf atrac au aud avi avm2 avs bap bfi c93 cak cin cmv cpk daud dct divx dts dv dvd dxa eac3 film flac flc fli fll flx flv g726 gsm gxf iss m1v m2v m2t m2ts m4a m4b m4v mad mj2 mjpeg mjpg mka mkv mlp mm mmf mov mp+ mp1 mp2 mp3 mp4 mpc mpeg mpg mpga mpp mpu mve mvi mxf nc nsv nut nuv oga ogm ogv ogx oma ogg omg opus psp pva qcp qt r3d ra ram rl2 rm rmvb roq rpl rvc shn smk snd sol son spx str swf tak tgi tgq tgv thp ts tsp tta xa xvid uv uv2 vb vid vob voc vp6 vmd wav webm wma wmv wsaud wsvga wv wve
 [pcm]

Filters:




  


  here are logs from mpd deamon

  


  Output of ffmpeg command

  


  
Mon Jul 25 09:40:30 2022 daemon.err mpd[1969]: exception: Error in /etc/mpd.conf line 17; Unknown tokens after '{'
Mon Jul 25 09:44:23 2022 daemon.debug mpd: vorbis: Xiph.Org libVorbis 1.3.7
Mon Jul 25 09:44:23 2022 daemon.debug mpd: opus: libopus 1.3.1-fixed
Mon Jul 25 09:44:23 2022 daemon.debug mpd: curl: version 7.82.0
Mon Jul 25 09:44:23 2022 daemon.debug mpd: curl: with mbedTLS/2.16.12


  


  ffmpeg version 4.3.3 Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 8.4.0 (OpenWrt GCC 8.4.0 r16554-1d4dea6d4f)
  configuration: --enable-cross-compile --cross-prefix=arm-openwrt-linux-muslgnueabi- --arch=arm --cpu=cortex-a7 --target-os=linux --prefix=/usr --pkg-config=pkg-config --enable-shared --enable-static --enable-pthreads --enable-zlib --disable-doc --disable-debug --disable-lzma --disable-vaapi --disable-vdpau --disable-outdevs --disable-runtime-cpudetect --enable-lto --enable-vfp --enable-neon --enable-vfp --disable-x86asm --enable-hardcoded-tables --enable-gpl --enable-version3 --enable-nonfree --disable-swscale --disable-everything --enable-encoder=ac3 --enable-encoder=jpegls --enable-encoder=mpeg1video --enable-encoder=mpeg2video --enable-encoder=pcm_s16be --enable-encoder=pcm_s16le --enable-encoder=png --enable-encoder=vorbis --enable-encoder=zlib --enable-decoder=aac --enable-decoder=ac3 --enable-decoder=alac --enable-decoder=amrnb --enable-decoder=amrwb --enable-decoder=ape --enable-decoder=flac --enable-decoder=jpegls --enable-decoder=mp2 --enable-decoder=mp3 --enable-decoder=mpeg1video --enable-decoder=mpeg2video --enable-decoder=mpeg4 --enable-decoder=mpegvideo --enable-decoder=mpc7 --enable-decoder=mpc8 --enable-decoder=pcm_s16be --enable-decoder=pcm_s16le --enable-decoder=png --enable-decoder=vorbis --enable-decoder=wavpack --enable-decoder=wmav1 --enable-decoder=wmav2 --enable-decoder=zlib --enable-muxer=ac3 --enable-muxer=mp3 --enable-muxer=mp4 --enable-muxer=mpeg1video --enable-muxer=mpeg2video --enable-muxer=mpegts --enable-muxer=ogg --enable-muxer=rtp --enable-demuxer=aac --enable-demuxer=ac3 --enable-demuxer=amr --enable-demuxer=ape --enable-demuxer=avi --enable-demuxer=flac --enable-demuxer=matroska --enable-demuxer=mov --enable-demuxer=mp3 --enable-demuxer=mpegps --enable-demuxer=mpegts --enable-demuxer=mpegvideo --enable-demuxer=mpc --enable-demuxer=mpc8 --enable-demuxer=ogg --enable-demuxer=rm --enable-demuxer=rtsp --enable-demuxer=rtp --enable-demuxer=sdp --enable-demuxer=wav --enable-demuxer=wv --enable-parser=aac --enable-parser=flac --enable-parser=ac3 --enable-parser=mpegaudio --enable-parser=mpeg4video --enable-parser=mpegvideo --enable-protocol=file --enable-protocol=http --enable-protocol=icecast --enable-protocol=pipe --enable-protocol=rtp --enable-protocol=tcp --enable-protocol=udp --enable-decoder=adpcm_ima_wav --enable-decoder=adpcm_ima_qt --enable-decoder=adpcm_ms --enable-libfdk-aac --enable-encoder=libfdk_aac --enable-libmp3lame --enable-encoder=libmp3lame --enable-libopus --enable-decoder=libopus --enable-encoder=libopus --enable-libshine --enable-encoder=libshine --disable-postproc
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libswresample   3.  7.100 /  3.  7.100
Hyper fast Audio and Video encoder
usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...


  


• FFMpeg process created from Java on CentOS doesn't exit

  21 juin 2017, par Donz

  I need to convert a lot of wave files simultaneously. About 300 files in parallel. And new files come constantly. I use ffmpeg process call from my Java 1.8 app, which is running on CentOS. I know that I have to read error and input streams for making created process from Java possible to exit.

  My code after several expirements :

      private void ffmpegconverter(String fileIn, String fileOut){
  
      String[] comand = new String[]{"ffmpeg", "-v", "-8", "-i", fileIn, "-acodec", "pcm_s16le", fileOut};
  
  
  
      Process process = null;
  
      BufferedReader reader = null;
  
      try {
  
          ProcessBuilder pb = new ProcessBuilder(comand);
  
          pb.redirectErrorStream(true);
  
          process = pb.start();
  
  
  
          //Reading from error and standard output console buffer of process. Or it could halts because of nobody
  
          //reads its buffer
  
          reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
  
          String s;
  
          //noinspection StatementWithEmptyBody
  
          while ((s = reader.readLine()) != null) {
  
              log.info(Thread.currentThread().getName() + " with fileIn " + fileIn + " and fileOut " + fileOut + " writes " + s);
  
              //Ignored as we just need to empty the output buffer from process
  
          }
  
          log.info(Thread.currentThread().getName() + " ffmpeg process will be waited for");
  
          if (process.waitFor( 10, TimeUnit.SECONDS )) {
  
              log.info(Thread.currentThread().getName() + " ffmpeg process exited normally");
  
          } else {
  
              log.info(Thread.currentThread().getName() + " ffmpeg process timed out and will be killed");
  
          }
  
  
  
      } catch (IOException | InterruptedException e) {
  
          log.error(Thread.currentThread().getName() + "Error during ffmpeg process executing", e);
  
      } finally {
  
          if (process != null) {
  
              if (reader != null) {
  
                  try {
  
                      reader.close();
  
                  } catch (IOException e) {
  
                      log.error("Error during closing the process streams reader", e);
  
                  }
  
              }
  
              try {
  
                  process.getOutputStream().close();
  
              } catch (IOException e) {
  
                  log.error("Error during closing the process output stream", e);
  
              }
  
              process.destroyForcibly();
  
              log.info(Thread.currentThread().getName() + " ffmpeg process " + process + " must be dead now");
  
          }
  
      }
  
  }

  If I run separate test with this code it goes normally. But in my app I have hundreds of RUNNING deamon threads "process reaper" which are waiting for ffmpeg process finish. In my real app ffpmeg is started from timer thread. Also I have another activity in separate threads, but I don’t think that this is the problem. Max CPU consume is about 10%.

  Here is that I usual see in thread dump :

  "process reaper" #454 daemon prio=10 os_prio=0 tid=0x00007f641c007000 nid=0x5247 runnable [0x00007f63ec063000]
  
     java.lang.Thread.State: RUNNABLE
  
      at java.lang.UNIXProcess.waitForProcessExit(Native Method)
  
      at java.lang.UNIXProcess.lambda$initStreams$3(UNIXProcess.java:289)
  
      at java.lang.UNIXProcess$$Lambda$32/2113551491.run(Unknown Source)
  
      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
  
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
  
      at java.lang.Thread.run(Thread.java:745)

  What am I doing wrong ?

  UPD :
  My app accepts a lot of connects with voice traffic. So I have about 300-500 another "good" threads in every moment. Could it be the reason ? Deamon threads have low priority. But I don’t beleive that they really can’t do their jobs in one hour. Ususally it takes some tens of millis.

  UPD2 :
  My synthetic test that runs fine. I tried with new threads option and without it just with straigt calling of run method.

  import java.io.BufferedReader;
  
  import java.io.File;
  
  import java.io.IOException;
  
  import java.io.InputStreamReader;
  
  
  
  public class FFmpegConvert {
  
  
  
      public static void main(String[] args) throws Exception {
  
  
  
          FFmpegConvert f = new FFmpegConvert();
  
          f.processDir(args[0], args[1], args.length > 2);
  
      }
  
  
  
      private void processDir(String dirPath, String dirOutPath, boolean isNewThread) {
  
          File dir = new File(dirPath);
  
          File dirOut = new File(dirOutPath);
  
          if(!dirOut.exists()){
  
              dirOut.mkdir();
  
          }
  
          for (int i = 0; i < 1000; i++) {
  
              for (File f : dir.listFiles()) {
  
                  try {
  
                      System.out.println(f.getName());
  
                      FFmpegRunner fFmpegRunner = new FFmpegRunner(f.getAbsolutePath(), dirOut.getAbsolutePath() + "/" + System.currentTimeMillis() + f.getName());
  
                      if (isNewThread) {
  
                          new Thread(fFmpegRunner).start();
  
                      } else {
  
                          fFmpegRunner.run();
  
                      }
  
                  } catch (Exception e) {
  
                      e.printStackTrace();
  
                  }
  
              }
  
          }
  
      }
  
  
  
      class FFmpegRunner implements Runnable {
  
          private String fileIn;
  
          private String fileOut;
  
  
  
          FFmpegRunner(String fileIn, String fileOut) {
  
              this.fileIn = fileIn;
  
              this.fileOut = fileOut;
  
          }
  
  
  
          @Override
  
          public void run() {
  
              try {
  
                  ffmpegconverter(fileIn, fileOut);
  
              } catch (Exception e) {
  
                  e.printStackTrace();
  
              }
  
          }
  
  
  
          private void ffmpegconverter(String fileIn, String fileOut) throws Exception{
  
              String[] comand = new String[]{"ffmpeg", "-i", fileIn, "-acodec", "pcm_s16le", fileOut};
  
  
  
              Process process = null;
  
              try {
  
                  ProcessBuilder pb = new ProcessBuilder(comand);
  
                  pb.redirectErrorStream(true);
  
                  process = pb.start();
  
  
  
                  //Reading from error and standard output console buffer of process. Or it could halts because of nobody
  
                  //reads its buffer
  
                  BufferedReader reader =
  
                          new BufferedReader(new InputStreamReader(process.getInputStream()));
  
                  String line;
  
                  //noinspection StatementWithEmptyBody
  
                  while ((line = reader.readLine()) != null) {
  
                      System.out.println(line);
  
                      //Ignored as we just need to empty the output buffer from process
  
                  }
  
  
  
                  process.waitFor();
  
              } catch (IOException | InterruptedException e) {
  
                  throw e;
  
              } finally {
  
                  if (process != null)
  
                      process.destroy();
  
              }
  
          }
  
  
  
      }
  
  
  
  }

  UPD3 :
  Sorry, I forgot to notice that I see the work of all these process - they created new converted files but anyway don’t exit.