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• FFmpeg 'Unable to parse option value "(null)" as sample format'

  1er août 2016, par Akshat

  Im trying to process a file and run the following command

  ffmpeg -i input.webm output.webm

  I’m doing it with the ffmpeg library from videoconverter.js. I’m trying to understand what is wrong or how I can fix it.

  I end up getting this :

  Worker has received command
  
  Received command: -i input.webm output.webm.  Processing with 268435456 bits.
  
  ffmpeg version 2.2.1 Copyright (c) 2000-2014 the FFmpeg developers
  
    built on Jun  9 2014 20:24:32 with emcc (Emscripten GCC-like replacement) 1.12.0 (commit 6960d2296299e96d43e694806f5d35799ef8d39c)
  
    configuration: --cc=emcc --prefix=/Users/bgrinstead/Sites/videoconverter.js/build/ffmpeg/../dist --extra-cflags='-I/Users/bgrinstead/Sites/videoconverter.js/build/ffmpeg/../dist/include -v' --enable-cross-compile --target-os=none --arch=x86_32 --cpu=generic --disable-ffplay --disable-ffprobe --disable-ffserver --disable-asm --disable-doc --disable-devices --disable-pthreads --disable-w32threads --disable-network --disable-hwaccels --disable-parsers --disable-bsfs --disable-debug --disable-protocols --disable-indevs --disable-outdevs --enable-protocol=file --enable-libvpx --enable-gpl --extra-libs='/Users/bgrinstead/Sites/videoconverter.js/build/ffmpeg/../dist/lib/libx264.a /Users/bgrinstead/Sites/videoconverter.js/build/ffmpeg/../dist/lib/libvpx.a'
  
    libavutil      52. 66.100 / 52. 66.100
  
    libavcodec     55. 52.102 / 55. 52.102
  
    libavformat    55. 33.100 / 55. 33.100
  
    libavdevice    55. 10.100 / 55. 10.100
  
    libavfilter     4.  2.100 /  4.  2.100
  
    libswscale      2.  5.102 /  2.  5.102
  
    libswresample   0. 18.100 /  0. 18.100
  
    libpostproc    52.  3.100 / 52.  3.100
  
  [vp8 @ 0xed8c00] Warning: not compiled with thread support, using thread emulation
  
  Guessed Channel Layout for  Input Stream #0.0 : mono
  
  Input #0, matroska,webm, from 'input.webm':
  
    Metadata:
  
      encoder         : Chrome
  
    Duration: N/A, start: 0.000000, bitrate: N/A
  
      Stream #0:0(eng): Audio: opus, 48000 Hz, mono (default)
  
      Stream #0:1(eng): Video: vp8, yuv420p, 640x480, SAR 1:1 DAR 4:3, 30 fps, 30 tbr, 1k tbn, 1k tbc (default)
  
  [abuffer @ 0xedd670] Unable to parse option value "(null)" as sample format
  
      Last message repeated 1 times
  
      Last message repeated 1 times
  
  [abuffer @ 0xedd670] Error setting option sample_fmt to value (null).
  
  [graph 1 input from stream 0:0 @ 0xedd600] Error applying options to the filter.
  
  Error opening filters!
  
  Finished processing (took 673ms)

  The end result is stopped due to ’Unable to parse option value "(null)" as sample format’. How would I solve this ?

• Remove the legacy X11 screen grabber

  27 juillet 2016, par Diego Biurrun

  Remove the legacy X11 screen grabber
  The XCB screen grabber is a drop-in replacement and not under GPL.
  

  • [DBH] Changelog
  • [DBH] LICENSE
  • [DBH] configure
  • [DBH] libavdevice/Makefile
  • [DBH] libavdevice/alldevices.c
  • [DBH] libavdevice/avdevice.h
  • [DBH] libavdevice/x11grab.c

• libavutil : Always use some GCC style attributes on clang

  18 juillet 2016, par Martin Storsjö

  libavutil : Always use some GCC style attributes on clang
  Clang normally disguises as GCC (defining __GNUC__), and thus get
  
  all the normal GCC specific attributes.
  Clang can also work as a drop-in replacement for MSVC, and in these
  
  cases, it doesn’t define __GNUC__, but defines _MSC_VER instead.
  Even in these setups, it still supports the GCC style attributes,
  
  thus use them, especially where there isn’t any MSVC specific
  
  version, or where the MSVC specific version doesn’t work on clang
  
  (for DECLARE_ASM_CONST).
  Signed-off-by : Martin Storsjö <martin@martin.st>
  

  • [DBH] libavutil/attributes.h
  • [DBH] libavutil/mem.h