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• Generating 64kbps audio-only mpegts for HTTP Live segmenter to meept 64kbps audio only requirement

  23 avril 2012, par Pobre

  I am trying to convert our mp4 files into mpeg-ts and segment it into .ts files for my iphone app to play. I am using Carson McDonalds's HTTP-Live-Video-Stream-Segmenter-and-Distributor to do that.

  I got his stuff complied and working correctly. I am currently trying to meet Apple's requirement where I need to provide a baseline 64 kbps audio only stream to my m3u8 playlist.
  Carson doesn't seem to have a profile for that.

  I need to be able to generate 64kbps audio-only stream from mp4, and turn that into mpeg-ts for the segmenter into ts. I am trying to find the right ffmpeg command that will validate without problem using Apple's mediastreamvalidator.

  So far I modified an existing encoding profile to try to achieve 64kbps total :

  ffmpeg -er 4 -i %s -f mpegts -acodec libmp3lame -ar 22050 -ab 32k -s 240x180 -vcodec libx264 -b 16k -flags +loop+mv4 -cmp 256 -partitions +parti4x4+partp8x8+partb8x8 -subq 7 -trellis 1 -refs 5 -coder 0 -me_range 16 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -bt 64k -maxrate 16k -bufsize 16k -rc_eq 'blurCplx^(1-qComp)' -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4 -level 30 -aspect 4:3 -r 10 -g 30 -async 2 - | %s %s %s %s %s

  but then when I try to validate it using mediastreamvalidator, it gives error after few ts :

  Playlist Validation : OK

  Segments :

  sample_cell_4x3_64k-00001.ts :

  WARNING : Media segment exceeds target duration of 10.00 seconds by 1.30 seconds (segment duration is 11.30 seconds)

  sample_cell_4x3_64k-00002.ts :

  WARNING : Media segment exceeds target duration of 10.00 seconds by 1.40 seconds (segment duration is 11.40 seconds)

  ....
  ....

  sample_cell_4x3_64k-00006.ts :

  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

  sample_cell_4x3_64k-00007.ts :

  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

  ....
  ....
  Average segment duration : 10.26 seconds
  Average segment bitrate : 376797.92 bps
  Average segment structural overhead : 349242.17 bps (92.69 %)

  Is there someway I can generate this correctly with just audio which totals 64kbps and turn it into mpeg-ts ready to be segmented and validated correctly ?

  Am I approaching the problem right ?

• error : ‘CODEC_TYPE_AUDIO’ undeclared when make m3u8-segmenter

  28 février 2012, par why

  I want to make m3u8-segmenter for Http Live Stream : https://github.com/johnf/m3u8-segmenter

  There are errors when I make, the errors are :

  gcc -g -O -Wall -Wstrict-prototypes -Wmissing-prototypes -Waggregate-return -Wcast-align -Wcast-qual -Wnested-externs -Wshadow -Wbad-function-cast -Wwrite-strings -Werror m3u8-segmenter.c -o m3u8-segmenter -lavformat -lavcodec -lavutil
  
  m3u8-segmenter.c: In function ‘add_output_stream’:
  
  m3u8-segmenter.c:82:14: error: ‘CODEC_TYPE_AUDIO’ undeclared (first use in this function)
  
  m3u8-segmenter.c:82:14: note: each undeclared identifier is reported only once for each function it appears in
  
  m3u8-segmenter.c:94:14: error: ‘CODEC_TYPE_VIDEO’ undeclared (first use in this function)
  
  m3u8-segmenter.c: In function ‘main’:
  
  m3u8-segmenter.c:338:5: error: ‘av_open_input_file’ is deprecated (declared at /usr/local/include/libavformat/avformat.h:1090) [-Werror=deprecated-declarations]
  
  m3u8-segmenter.c:352:5: error: implicit declaration of function ‘guess_format’ [-Werror=implicit-function-declaration]
  
  m3u8-segmenter.c:352:5: error: nested extern declaration of ‘guess_format’ [-Werror=nested-externs]
  
  m3u8-segmenter.c:352:10: error: assignment makes pointer from integer without a cast [-Werror]
  
  m3u8-segmenter.c:371:18: error: ‘CODEC_TYPE_VIDEO’ undeclared (first use in this function)
  
  m3u8-segmenter.c:376:18: error: ‘CODEC_TYPE_AUDIO’ undeclared (first use in this function)
  
  m3u8-segmenter.c:387:5: error: ‘av_set_parameters’ is deprecated (declared at /usr/local/include/libavformat/avformat.h:1434) [-Werror=deprecated-declarations]
  
  m3u8-segmenter.c:392:5: error: ‘dump_format’ is deprecated (declared at /usr/local/include/libavformat/avformat.h:1559) [-Werror=deprecated-declarations]
  
  m3u8-segmenter.c:406:5: error: ‘url_fopen’ is deprecated (declared at /usr/local/include/libavformat/avio.h:279) [-Werror=deprecated-declarations]
  
  m3u8-segmenter.c:411:5: error: ‘av_write_header’ is deprecated (declared at /usr/local/include/libavformat/avformat.h:1492) [-Werror=deprecated-declarations]
  
  m3u8-segmenter.c:444:67: error: ‘PKT_FLAG_KEY’ undeclared (first use in this function)
  
  m3u8-segmenter.c:455:13: error: ‘put_flush_packet’ is deprecated (declared at /usr/local/include/libavformat/avio.h:293) [-Werror=deprecated-declarations]
  
  m3u8-segmenter.c:456:13: error: ‘url_fclose’ is deprecated (declared at /usr/local/include/libavformat/avio.h:280) [-Werror=deprecated-declarations]
  
  m3u8-segmenter.c:476:13: error: ‘url_fopen’ is deprecated (declared at /usr/local/include/libavformat/avio.h:279) [-Werror=deprecated-declarations]
  
  m3u8-segmenter.c:482:13: error: ‘av_write_header’ is deprecated (declared at /usr/local/include/libavformat/avformat.h:1492) [-Werror=deprecated-declarations]
  
  m3u8-segmenter.c:514:5: error: ‘url_fclose’ is deprecated (declared at /usr/local/include/libavformat/avio.h:280) [-Werror=deprecated-declarations]
  
  cc1: all warnings being treated as errors
  
  
  
  make: *** [all] Error 1

• FFMpeg Android Stagefright SIGSEGV error (h264 decode)

  19 avril 2013, par Sergey Ochkur

  I need to decode h264 file to YUV on Android 2.3+. As I understand I need to communicate with Stagefright, as it`s the only way now, after closing access with OpenMAX IL implementations. I have used FFmpeg 0.10 (and tried 0.9/0.9.1..) for this issue, compiled it with NDK7 (and also tried NDK6b with the same result) :

    ffmpeg version 0.10 Copyright (c) 2000-2012 the FFmpeg developers
  
    built on Jan 28 2012 14:42:37 with gcc 4.4.3
  
    configuration: --target-os=linux --cross-prefix=arm-linux-androideabi- --arch=arm --cpu=armv7-a --sysroot=/home/grid/Android/Android_NDK/platforms/android-9/arch-arm --disable-avdevice --disable-decoder=h264 --disable-decoder=h264_vdpau --enable-libstagefright-h264 --prefix=build/stagefright/armeabi-v7a --extra-cflags='-Iandroid-source/frameworks/base/include -Iandroid-source/system/core/include -Iandroid-source/frameworks/base/media/libstagefright -Iandroid-source/frameworks/base/include/media/stagefright/openmax -I/home/grid/Android/Android_NDK/sources/cxx-stl/system/include -march=armv7-a -mfloat-abi=softfp -mfpu=neon' --extra-ldflags='-Wl,--fix-cortex-a8 -Landroid-libs -Wl,-rpath-link,android-libs' --extra-cxxflags='-Wno-multichar -fno-exceptions -fno-rtti'
  
    libavutil      51. 34.101 / 51. 34.101
  
    libavcodec     53. 60.100 / 53. 60.100
  
    libavformat    53. 31.100 / 53. 31.100
  
    libavfilter     2. 60.100 /  2. 60.100
  
    libswscale      2.  1.100 /  2.  1.100
  
    libswresample   0.  6.100 /  0.  6.100
  
  Hyper fast Audio and Video encoder
  
  usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...

  Hardware : Beagleboard-Xm + TI Android 2.3 (official)

  So, entering next command give me error with 480p :
  ffmpeg -i /sdcard/Video/480p.mp4

  Stopped (signal) ffmpeg -i /sdcard/Video/480p.mp4

  Full Android "answer" from ADB Logcat :
  http://pastebin.com/76JLgtXX

  Android-developers, does anybody know what this error means and how to deal with it ?
  I tried to make DSP window bigger, but with no luck.
  Commands like "stagefright /sdcard/Video/480p.mp4" works fine.

  P.S. Additionally I found that on some bigger files (720p) Android answers next :

  [libstagefright_h264 @ 0xd479b0] Decode failed : 80000000