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• ffmpeg configure always returns "not found" when using sysroot and cross-prefix options - how to use them correctly ?

  5 août 2014, par user2212461

  I try to build ffmpeg with a cross-compiler. When setting the configure flags I am getting the following errors :

  WARNING: Compiler does not indicate floating-point ABI, guessing soft.
  
  build_it.sh: 29: build_it.sh: --sysroot=/home/android/android-ndk-r9/platforms/
  
      android-9/arch-arm/: not found
  
  build_it.sh: 32: build_it.sh.sh: --cross-prefix=/home/android/android-ndk-r9/
  
      toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86/bin/arm-linux-and
  
      roideabi-: not found

  The error message "not found" sounds like the paths dont exist but they are all correct and existing. How can I resolve this error ?

  build_it.sh :

  NDK=/home/android/android-ndk-r9
  
  SYSROOT=$NDK/platforms/android-9/arch-arm/
  
  TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86
  
  CPU=arm
  
  PREFIX=test
  
  ADDI_CFLAGS="-marm"
  
  platform="android-9"
  
  
  
  ./configure \
  
      --disable-asm \
  
      --enable-shared \
  
      --target-os=linux \
  
      --arch=arm \
  
      --enable-cross-compile \
  
      --disable-static \
  
      --sysroot=$SYSROOT \
  
      --extra-cflags="-Os -fpic $ADDI_CFLAGS" \
  
      --extra-ldflags="$ADDI_LDFLAGS"
  
      --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
  
      --prefix=$PREFIX \
  
  
  
  ##configure fails here
  
  ...

• Burn subtitles in a stop motion video, with hardware acceleration

  9 février 2020, par Belinde

  I’m trying to make a year long stop motion video with the images taken from a webcam. I’ve created a input.txt file with this format inside :

  ffconcat version 1.0
  
  
  
  file 'amianthe201909031230.jpg'
  
  duration 0.093034825870647
  
  
  
  file 'amianthe201909031330.jpg'
  
  duration 0.093034825870647

  The command I’ve crafted (mostly taken from the example in the official ffmpeg documentation) is :

  ffmpeg \
  
      -y \
  
      -hwaccel vaapi \
  
      -hwaccel_device /dev/dri/renderD128 \
  
      -hwaccel_output_format vaapi \
  
      -f concat \
  
      -i input.txt \
  
      -vf 'hwmap=mode=read+write+direct,format=nv12,ass=subtitles.ass,hwmap' \
  
      -c:v h264_vaapi \
  
      ~/amianthe.mp4

  But it badly fails with this output :

  ffmpeg version 4.1.4-1build2 Copyright (c) 2000-2019 the FFmpeg developers
  
    built with gcc 9 (Ubuntu 9.2.1-4ubuntu1)
  
    configuration: --prefix=/usr --extra-version=1build2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  
    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
  
  Input #0, concat, from 'input.txt':
  
    Duration: 00:00:18.70, start: 0.000000, bitrate: 5 kb/s
  
      Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 1920x1080 [SAR 1:1 DAR 16:9], 25 tbr, 25 tbn, 25 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (h264_vaapi))
  
  Press [q] to stop, [?] for help
  
  [Parsed_ass_2 @ 0x5557f4ec4ac0] Shaper: FriBidi 0.19.7 (SIMPLE) HarfBuzz-ng 2.6.1 (COMPLEX)
  
  [Parsed_ass_2 @ 0x5557f4ec4ac0] Using font provider fontconfig
  
  [Parsed_ass_2 @ 0x5557f4ec4ac0] Added subtitle file: 'subtitles.ass' (4 styles, 2 events)
  
  [Parsed_hwmap_3 @ 0x5557f5381ec0] Unsupported formats for hwmap: from nv12 (vaapi_vld) to vaapi_vld.
  
  [Parsed_hwmap_3 @ 0x5557f5381ec0] Failed to configure output pad on Parsed_hwmap_3
  
  Error reinitializing filters!
  
  Failed to inject frame into filter network: Invalid argument
  
  Error while processing the decoded data for stream #0:0
  
  Conversion failed!

  I’m honestly lost : from my understanding, all the elaboration should be done directly in the video card memory, so I don’t understand why it’s converting the surface format. Is there some other parameter I must put in format ? What am I missing ?

• vp56data : Move all shared enum/struct declarations to common header

  14 août 2013, par Diego Biurrun

  vp56data : Move all shared enum/struct declarations to common header
  

  • [DH] libavcodec/vp56.h
  • [DH] libavcodec/vp56data.h
  • [DH] libavcodec/vp6data.h
  • [DH] libavcodec/vp8.h