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• aac encoding with ffmpeg result in super short file

  5 janvier 2017, par Mockarutan

  So I’m having problem with AAC encoding. I’m trying to encode some synthetic sound waves, but it does not work as expected. The file I get gives just a super short sound when played in VLC. When I play is in ffplay is plays like I expect, but it says "duration : 00:00:00.05" which I suppose says 5 ms. But I encode a lot more than that, and it played more. So VLC plays a super short sound, ffplay plays a longer file (the expected length), but displays it with super short duration, what’s going on ?

  Source : http://pastebin.com/M5MKkEL3

  One of the things that looks wrong to me is this :
  If you look for the variable "audio_time", if you breakpoint it and read it every encode frame, you will get this :

  ..
  Encode frame 8 : 0.00010416666666666666
  Encode frame 9 : 0.00012500000000000000
  (and so on)

  The diff is : 0.00002085, which is a 1/1000 of a the diff I expected from 47 samples frames per second, which is what the encoder wants with 48k sample rate (48k / 1024 = 47).

  So why do I get a thousand of the expected data encoded ?

  Feel free to point anything suspicious out !

  Thanks in advance !

• Video moves sideways when captured raw from camera and piped into ffplay

  21 septembre 2018, par peetonn

  I’m trying to capture video from the camera using ffmpeg (macOS 10.12) and pipe it for preview into ffplay using rawvideo and -v copy options :

  ffmpeg -f avfoundation -pixel_format 0rgb -framerate 25 -video_size 1280x720 -i "0" -map 0:v -c copy -f rawvideo - | ffplay -f rawvideo -video_size 1280x720 -pixel_format 0rgb -i -

  Video captures just fine, however, it constantly moves sideways (see screenshot attached). What might the issue here ?

  

  UPDATE Full ffmpeg log output :

  $ ffmpeg -f avfoundation -pixel_format 0rgb -framerate 25 -video_size 1280x720 -i "0" -map 0:v -c copy -f rawvideo - | ffplay -f rawvideo -video_size 1280x720 -pixel_format 0rgb -i -
  
  ffmpeg version 4.0.2ffplay version 4.0.2 Copyright © 2003-2018 the FFmpeg developers Copyright © 2000-2018 the FFmpeg developers
  
  
  
    built with Apple LLVM version 9.0.0 (clang-900.0.39.2)
  
    built with Apple LLVM version 9.0.0 (clang-900.0.39.2)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/4.0.2 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-gpl --enable-ffplay --enable-libfontconfig --enable-libfreetype --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/4.0.2 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-gpl --enable-ffplay --enable-libfontconfig --enable-libfreetype --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma
  
    libavutil      56. 14.100 / 56. 14.100
  
    libavutil      56. 14.100 / 56. 14.100
  
    libavcodec     58. 18.100 / 58. 18.100
  
    libavformat    58. 12.100 / 58. 12.100
  
    libavcodec     58. 18.100 / 58. 18.100
  
    libavdevice    58.  3.100 / 58.  3.100
  
    libavformat    58. 12.100 / 58. 12.100
  
    libavfilter     7. 16.100 /  7. 16.100
  
    libavdevice    58.  3.100 / 58.  3.100
  
    libavresample   4.  0.  0 /  4.  0.  0
  
    libavfilter     7. 16.100 /  7. 16.100
  
    libswscale      5.  1.100 /  5.  1.100
  
    libswresample   3.  1.100 /  3.  1.100
  
    libavresample   4.  0.  0 /  4.  0.  0
  
    libpostproc    55.  1.100 / 55.  1.100
  
    libswscale      5.  1.100 /  5.  1.100
  
    libswresample   3.  1.100 /  3.  1.100
  
    libpostproc    55.  1.100 / 55.  1.100
  
  2018-09-20 09:33:28.013 ffmpeg[45781:16452887] Error loading /Library/Audio/Plug-Ins/HAL/SeratoVirtualAudioPlugIn.plugin/Contents/MacOS/SeratoVirtualAudioPlugIn:  dlopen(/Library/Audio/Plug-Ins/HAL/SeratoVirtualAudioPlugIn.plugin/Contents/MacOS/SeratoVirtualAudioPlugIn, 262): no suitable image found.  Did find:
  
      /Library/Audio/Plug-Ins/HAL/SeratoVirtualAudioPlugIn.plugin/Contents/MacOS/SeratoVirtualAudioPlugIn: mach-o, but wrong architecture
  
      /Library/Audio/Plug-Ins/HAL/SeratoVirtualAudioPlugIn.plugin/Contents/MacOS/SeratoVirtualAudioPlugIn: mach-o, but wrong architecture
  
  2018-09-20 09:33:28.013 ffmpeg[45781:16452887] Cannot find function pointer New_SHP_PlugIn for factory 834FC054-C1CC-11D6-BD01-00039315CD46 in CFBundle/CFPlugIn 0x7fe63b506d00 Audio/Plug-Ins/HAL/SeratoVirtualAudioPlugIn.plugin> (bundle, not loaded)
  
  2018-09-20 09:33:28.069 ffplay[45782:16452888] Error loading /Library/Audio/Plug-Ins/HAL/SeratoVirtualAudioPlugIn.plugin/Contents/MacOS/SeratoVirtualAudioPlugIn:  dlopen(/Library/Audio/Plug-Ins/HAL/SeratoVirtualAudioPlugIn.plugin/Contents/MacOS/SeratoVirtualAudioPlugIn, 262): no suitable image found.  Did find:
  
      /Library/Audio/Plug-Ins/HAL/SeratoVirtualAudioPlugIn.plugin/Contents/MacOS/SeratoVirtualAudioPlugIn: mach-o, but wrong architecture
  
      /Library/Audio/Plug-Ins/HAL/SeratoVirtualAudioPlugIn.plugin/Contents/MacOS/SeratoVirtualAudioPlugIn: mach-o, but wrong architecture
  
  2018-09-20 09:33:28.069 ffplay[45782:16452888] Cannot find function pointer New_SHP_PlugIn for factory 834FC054-C1CC-11D6-BD01-00039315CD46 in CFBundle/CFPlugIn 0x7f93f3c13020 Audio/Plug-Ins/HAL/SeratoVirtualAudioPlugIn.plugin> (bundle, not loaded)
  
  [avfoundation @ 0x7fe63c000000] Stream #0: not enough frames to estimate rate; consider increasing probesize
  
  Input #0, avfoundation, from '0':
  
    Duration: N/A, start: 1054.178167, bitrate: N/A
  
      Stream #0:0: Video: rawvideo ([0]RGB / 0x42475200), 0rgb, 1280x720, 1000k tbr, 1000k tbn, 1000k tbc
  
  Output #0, rawvideo, to 'pipe:':   0KB vq=    0KB sq=    0B f=0/0   
  
    Metadata:
  
      encoder         : Lavf58.12.100
  
      Stream #0:0: Video: rawvideo ([0]RGB / 0x42475200), 0rgb, 1280x720, q=2-31, 1000k tbr, 1000k tbn, 1000k tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 ©
  
  Press [q] to stop, [?] for help
  
  Input #0, rawvideo, from 'pipe:':
  
    Duration: N/A, start: 0.000000, bitrate: 737280 kb/s
  
      Stream #0:0: Video: rawvideo ([0]RGB / 0x42475200), 0rgb, 1280x720, 737280 kb/s, 25 tbr, 25 tbn, 25 tbc
  
  frame=   16 fps=0.0 q=-1.0 size=   57600kB time=00:00:00.60 bitrate=786437.5kbits/s speed=1.frame=   29 fps= 28 q=-1.0 size=  104401kB time=00:00:01.12 bitrate=763617.4kbits/s speed=1.frame=   42 fps= 27 q=-1.0 size=  151201kB time=00:00:01.64 bitrate=755268.5kbits/s speed=1.frame=   55 fps= 26 q=-1.0 size=  198002kB time=00:00:02.16 bitrate=750939.5kbits/s speed=1.frame=   68 fps= 26 q=-1.0 size=  244802kB time=00:00:02.68 bitrate=748290.4kbits/s speed=1.av_interleaved_write_frame(): Broken pipe=    0KB sq=    0B f=0/0   
  
  Error writing trailer of pipe:: Broken pipe
  
  frame=   69 fps= 26 q=-1.0 Lsize=  247650kB time=00:00:02.72 bitrate=745863.6kbits/s speed=1.01x    
  
  video:248402kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
  
  Exiting normally, received signal 2.

• File input of avformat_open_input in ffmpeg

  28 février 2016, par Justin Chang

  I’m trying to use function avformat_open_input in FFmpeg to open the file which contains Chinese word.

  For example :

  char* file="C:/測試/baby.mp4";
  
  
  
  avformat_open_input(&pFormatCtx, file, NULL, NULL);

  But, it seems to be failed.

  My question is how do I pass the file path which contains Chinese (or other languages except for English) ?