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• Encoding for HTTP Live Streaming with Xuggle

  26 mai 2012, par Luuk D. Jansen

  I have created a server system based on Xuggle to encode an incoming file to H264 and segment it. However, when playing the video back in Quicktime it almost works (with a small hiccup in the audio sometimes) but when changing fro one quality stream to another the image gets lost.

  So I ran the 'mediastreamvalidator'and got the following error :

  ERROR : (-1) Unknown video codec : 1836069494 (program 0, track 0)
  ERROR : (-1) failed to parse segment as either an MPEG-2 TS or an ES

  So I used FFMPEG to get some info on the codex :
  The result of my Xuggler encoding :

  Input #0, mpegts, from 'segment_0.ts':
  
    Duration: 00:00:09.40, start: 0.000000, bitrate: 3618 kb/s
  
    Program 1 
  
      Metadata:
  
        service_name    : Service01
  
        service_provider: FFmpeg
  
      Stream #0.0[0x100]: Video: mpeg2video (Main), yuv420p, 960x540 [PAR 1:1 DAR 16:9], 104857 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc
  
      Stream #0.1[0x101]: Audio: mp2, 48000 Hz, stereo, s16, 128 kb/s

  The result of a file created by Compressor :

  Seems stream 0 codec frame rate differs from container frame rate: 180000.00 (180000/1) -> 25.00 (25/1)
  
  Input #0, mpegts, from 'fileSequence1.ts':
  
    Duration: 00:00:09.97, start: 19.984578, bitrate: 5308 kb/s
  
    Program 1 
  
      Stream #0.0[0x101]: Video: h264 (Main), yuv420p, 960x540, 25 tbr, 90k tbn, 180k tbc
  
      Stream #0.1[0x102]: Audio: aac, 22050 Hz, stereo, s16, 32 kb/s

  The main difference seems to me that for the Xuggler encoded file it says Video : mpeg2video instead of h264. However, while encoding I did specifically set the Coder to ICodec.ID.CODEC_ID_H264.

  How can I force it to use h264. The same with audio. I specified AAC and get MP2.

  I subsequent used FFMPEG directly and that results in :

  Input #0, mpegts, from 'encoded.ts':
  
    Duration: 00:00:24.16, start: 1.400000, bitrate: 360 kb/s
  
    Program 1 
  
      Metadata:
  
        service_name    : Service01
  
        service_provider: FFmpeg
  
      Stream #0.0[0x100]: Video: h264 (Main), yuv420p, 1920x1080 [PAR 1:1 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc
  
      Stream #0.1[0x101](eng): Audio: aac, 48000 Hz, stereo, s16, 57 kb/s

  That looks better. I could use FFMPEG directly, but by using Xuggler I can segment the file while easier keep track of progress of the process.

• Anomalie #2531 : Error 500

  12 juin 2012, par jluc -

  C’est signalé de nouveau sur le descriptif d’un article cette fois http://core.spip.org/issues/2750

• Got error (input/output error) during tcp opening, FFMPEG

  1er juin 2012, par manutd

  I got error during tcp opening.
  Exactly to say, avformat_open_input always return -5 (input/output error).
  I looked into the source of the error code using gdb and found that getaddrinfo(in libavformat/tcp.c) function didn't work well as expected and returned the error value EIO.
  ffmpeg source have ff_getaddrinfo(in libavformat/os_support.c) function that is linked to getaddrinfo but when I run the program and my program encountered getaddrinfo, my program called other function in libc.so, dynamic library. I couldn't find which function is called.
  I gave the valid url to ffmpeg. The valid url is "http://stream.radiojavan.com/radiojavan".

  I compiled ffmpeg source for Android-use and used ffmpeg version 0.8.1
  This is my configuration.

  ./configure --target-os=linux \
  
      --prefix=$PREFIX \
  
      --enable-cross-compile \
  
      --extra-libs="-lgcc" \
  
      --arch=arm \
  
      --cc=$PREBUILT/bin/arm-linux-androideabi-gcc \
  
      --cross-prefix=$PREBUILT/bin/arm-linux-androideabi- \
  
      --nm=$PREBUILT/bin/arm-linux-androideabi-nm \
  
      --sysroot=$PLATFORM \
  
      --extra-cflags=" -O3 -fpic -DANDROID -DHAVE_SYS_UIO_H=1 -Dipv6mr_interface=ipv6mr_ifindex -fasm -Wno-psabi -fno-short-enums  -fno-strict-aliasing -finline-limit=300 $OPTIMIZE_CFLAGS " \
  
      --disable-shared \
  
      --enable-static \
  
      --extra-ldflags="-Wl,-rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -nostdlib -lc -lm -ldl -llog" \
  
      --disable-ffplay \
  
      --enable-zlib \

  Any advise would be appreciated.