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  • h264 extracting frames works only on certain operating system / ffmpeg version

    15 juin 2018, par J. S.

    I have received parsed h264 data from my phone, and I am trying to extract frames from the data.

    I used the following ffmpeg command lines :

    ffmpeg -i temp.h264 -ss 5 -pix_fmt yuv420p -vframes 1 foo.yuv
    

    
ffmpeg -s 1280:720 -pix_fmt yuv420p -i foo.yuv output.jpg

    This results in the right output image on Ubuntu (KDE neon User Edition 5.12) with ffmpeg version 2.8.14.

    However, it does not work on macOS High Sierra (10.13.4) with ffmpeg version 4.0 and instead shows an output message :

    Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)

    I am not sure whether this is a mere ffmpeg version-related issue or not because as an experiment, when I converted the h264 data into mp4 format and played it on macOS High Sierra, the video sometimes shows a sequence of black distorted image (screenshot), and other times, a normal video.

    If I play that same video on Ubuntu (KDE neon User Edition 5.12), the video plays perfectly.

    I don’t understand why this problem would occur, and whether this has to do with OS or ffmpeg library version.
    What would be some good ways to approach this problem ? Thanks.

    EDIT :

    Full log of first ffmpeg command line (ubuntu) :

    ffmpeg version 2.8.14-0ubuntu0.16.04.1 Copyright (c) 2000-2018 the FFmpeg developers
    
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.9) 20160609
    
  configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv
    
  libavutil      54. 31.100 / 54. 31.100
    
  libavcodec     56. 60.100 / 56. 60.100
    
  libavformat    56. 40.101 / 56. 40.101
    
  libavdevice    56.  4.100 / 56.  4.100
    
  libavfilter     5. 40.101 /  5. 40.101
    
  libavresample   2.  1.  0 /  2.  1.  0
    
  libswscale      3.  1.101 /  3.  1.101
    
  libswresample   1.  2.101 /  1.  2.101
    
  libpostproc    53.  3.100 / 53.  3.100
    
[h264 @ 0x11ae2a0] error while decoding MB 54 2, bytestream -16
    
[h264 @ 0x11ae2a0] top block unavailable for requested intra4x4 mode -1 at 2 9                                                                             
    
[h264 @ 0x11ae2a0] error while decoding MB 2 9, bytestream 6908                                                                                            
    
[h264 @ 0x11ae2a0] concealing 1275 DC, 1275 AC, 1275 MV errors in P frame
    
[h264 @ 0x11ae2a0] top block unavailable for requested intra4x4 mode -1 at 27 0
    
[h264 @ 0x11ae2a0] error while decoding MB 27 0, bytestream 5564                                                                                           
    
[h264 @ 0x11ae2a0] deblocking filter parameters 7 13 out of range                                                                                          
    
[h264 @ 0x11ae2a0] decode_slice_header error                                                                                                               
    
[h264 @ 0x11ae2a0] concealing 1440 DC, 1440 AC, 1440 MV errors in P frame
    
[h264 @ 0x11ae2a0] deblocking filter parameters 7 -14 out of range
    
[h264 @ 0x11ae2a0] decode_slice_header error                                                                                                               
    
[h264 @ 0x11ae2a0] concealing 1387 DC, 1387 AC, 1387 MV errors in P frame
    
[h264 @ 0x11ae2a0] deblocking filter parameters -7 0 out of range
    
[h264 @ 0x11ae2a0] decode_slice_header error                                                                                                               
    
[h264 @ 0x11ae2a0] concealing 1413 DC, 1413 AC, 1413 MV errors in P frame
    
[h264 @ 0x11ae2a0] top block unavailable for requested intra4x4 mode -1 at 9 0
    
[h264 @ 0x11ae2a0] error while decoding MB 9 0, bytestream 6647                                                                                            
    
[h264 @ 0x11ae2a0] concealing 1186 DC, 1186 AC, 1186 MV errors in P frame
    
[h264 @ 0x11ae2a0] top block unavailable for requested intra mode at 16 9
    
[h264 @ 0x11ae2a0] error while decoding MB 16 9, bytestream 6182                                                                                           
    
[h264 @ 0x11ae2a0] top block unavailable for requested intra4x4 mode -1 at 6 18                                                                            
    
[h264 @ 0x11ae2a0] error while decoding MB 6 18, bytestream 7042                                                                                           
    
[h264 @ 0x11ae2a0] concealing 1440 DC, 1440 AC, 1440 MV errors in P frame
    
[h264 @ 0x11ad340] Stream #0: not enough frames to estimate rate; consider increasing probesize
    
Input #0, h264, from 'temp.h264':
    
  Duration: N/A, bitrate: N/A
    
    Stream #0:0: Video: h264 (High), yuvj420p(pc), 1280x720, 29.97 fps, 29.97 tbr, 1200k tbn, 59.94 tbc
    
[swscaler @ 0x1207dc0] deprecated pixel format used, make sure you did set range correctly
    
Output #0, rawvideo, to 'foo.yuv':
    
  Metadata:
    
    encoder         : Lavf56.40.101
    
    Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 1280x720, q=2-31, 200 kb/s, 29.97 fps, 29.97 tbn, 29.97 tbc
    
    Metadata:
    
      encoder         : Lavc56.60.100 rawvideo
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (h264 (native) -> rawvideo (native))
    
Press [q] to stop, [?] for help
    
[h264 @ 0x11f98a0] error while decoding MB 54 2, bytestream -16
    
[h264 @ 0x11f98a0] top block unavailable for requested intra4x4 mode -1 at 2 9                                                                             
    
[h264 @ 0x11f98a0] error while decoding MB 2 9, bytestream 6908                                                                                            
    
[h264 @ 0x11f98a0] concealing 1275 DC, 1275 AC, 1275 MV errors in P frame
    
[h264 @ 0x12758e0] top block unavailable for requested intra4x4 mode -1 at 27 0
    
[h264 @ 0x12758e0] error while decoding MB 27 0, bytestream 5564                                                                                           
    
[h264 @ 0x12758e0] deblocking filter parameters 7 13 out of range                                                                                          
    
[h264 @ 0x12758e0] decode_slice_header error                                                                                                               
    
[h264 @ 0x12758e0] concealing 1440 DC, 1440 AC, 1440 MV errors in P frame
    
[h264 @ 0x11ffcc0] deblocking filter parameters 7 -14 out of range
    
[h264 @ 0x11ffcc0] decode_slice_header error                                                                                                               
    
[h264 @ 0x11ffcc0] concealing 1387 DC, 1387 AC, 1387 MV errors in P frame
    
[h264 @ 0x11f98a0] deblocking filter parameters -7 0 out of range
    
[h264 @ 0x11f98a0] decode_slice_header error                                                                                                               
    
[h264 @ 0x11f98a0] concealing 1413 DC, 1413 AC, 1413 MV errors in P frame
    
[h264 @ 0x12758e0] top block unavailable for requested intra4x4 mode -1 at 9 0
    
[h264 @ 0x12758e0] error while decoding MB 9 0, bytestream 6647                                                                                            
    
[h264 @ 0x12758e0] concealing 1186 DC, 1186 AC, 1186 MV errors in P frame
    
[h264 @ 0x11ffcc0] top block unavailable for requested intra mode at 16 9
    
[h264 @ 0x11ffcc0] error while decoding MB 16 9, bytestream 6182                                                                                           
    
[h264 @ 0x11ffcc0] top block unavailable for requested intra4x4 mode -1 at 6 18                                                                            
    
[h264 @ 0x11ffcc0] error while decoding MB 6 18, bytestream 7042                                                                                           
    
[h264 @ 0x11ffcc0] concealing 1440 DC, 1440 AC, 1440 MV errors in P frame
    
[h264 @ 0x11f98a0] top block unavailable for requested intra4x4 mode -1 at 12 9
    
[h264 @ 0x11f98a0] error while decoding MB 12 9, bytestream 6863                                                                                           
    
[h264 @ 0x11f98a0] concealing 1342 DC, 1342 AC, 1342 MV errors in P frame
    
[h264 @ 0x12758e0] top block unavailable for requested intra mode at 29 18
    
[h264 @ 0x12758e0] error while decoding MB 29 18, bytestream 6612                                                                                          
    
[h264 @ 0x12758e0] concealing 1405 DC, 1405 AC, 1405 MV errors in P frame
    
[h264 @ 0x11ffcc0] top block unavailable for requested intra mode at 25 9
    
[h264 @ 0x11ffcc0] error while decoding MB 25 9, bytestream 6051                                                                                           
    
[h264 @ 0x11ffcc0] top block unavailable for requested intra4x4 mode -1 at 70 18                                                                           
    
[h264 @ 0x11ffcc0] error while decoding MB 70 18, bytestream 5089                                                                                          
    
[h264 @ 0x11ffcc0] concealing 1419 DC, 1419 AC, 1419 MV errors in P frame
    
[h264 @ 0x11f98a0] top block unavailable for requested intra mode at 14 9
    
[h264 @ 0x11f98a0] error while decoding MB 14 9, bytestream 6071
    
[h264 @ 0x11f98a0] deblocking filter parameters -9 0 out of range
    
[h264 @ 0x11f98a0] decode_slice_header error
    
[h264 @ 0x11f98a0] concealing 1440 DC, 1440 AC, 1440 MV errors in P frame
    
[h264 @ 0x12758e0] top block unavailable for requested intra4x4 mode -1 at 54 9
    
[h264 @ 0x12758e0] error while decoding MB 54 9, bytestream 4423
    
[h264 @ 0x12758e0] concealing 1256 DC, 1256 AC, 1256 MV errors in P frame
    
[h264 @ 0x11ffcc0] top block unavailable for requested intra4x4 mode -1 at 22 9
    
[h264 @ 0x11ffcc0] error while decoding MB 22 9, bytestream 5861
    
[h264 @ 0x11ffcc0] concealing 1335 DC, 1335 AC, 1335 MV errors in P frame
    
[h264 @ 0x11f98a0] deblocking filter parameters 7 -4 out of range
    
[h264 @ 0x11f98a0] decode_slice_header error
    
[h264 @ 0x11f98a0] concealing 1430 DC, 1430 AC, 1430 MV errors in P frame
    
[h264 @ 0x12758e0] concealing 1319 DC, 1319 AC, 1319 MV errors in P frame
    
[h264 @ 0x11ffcc0] top block unavailable for requested intra4x4 mode -1 at 16 9
    
[h264 @ 0x11ffcc0] error while decoding MB 16 9, bytestream 6217
    
[h264 @ 0x11ffcc0] concealing 1416 DC, 1416 AC, 1416 MV errors in P frame
    
[h264 @ 0x11f98a0] top block unavailable for requested intra4x4 mode -1 at 12 0
    
[h264 @ 0x11f98a0] error while decoding MB 12 0, bytestream 6854
    
[h264 @ 0x11f98a0] top block unavailable for requested intra4x4 mode -1 at 2 9
    
[h264 @ 0x11f98a0] error while decoding MB 2 9, bytestream 7093
    
[h264 @ 0x11f98a0] concealing 1440 DC, 1440 AC, 1440 MV errors in P frame
    
[h264 @ 0x12758e0] top block unavailable for requested intra4x4 mode -1 at 59 0
    
[h264 @ 0x12758e0] error while decoding MB 59 0, bytestream 4955
    
[h264 @ 0x12758e0] deblocking filter parameters 7 15 out of range
    
[h264 @ 0x12758e0] decode_slice_header error
    
[h264 @ 0x12758e0] concealing 1430 DC, 1430 AC, 1430 MV errors in P frame
    
[h264 @ 0x11ffcc0] top block unavailable for requested intra4x4 mode -1 at 34 0
    
[h264 @ 0x11ffcc0] error while decoding MB 34 0, bytestream 5338
    
[h264 @ 0x11ffcc0] deblocking filter parameters 7 13 out of range
    
[h264 @ 0x11ffcc0] decode_slice_header error
    
[h264 @ 0x11ffcc0] concealing 1440 DC, 1440 AC, 1440 MV errors in P frame
    
[h264 @ 0x11ffcc0] Reinit context to 1280x720, pix_fmt: yuv420p
    
[h264 @ 0x11f98a0] concealing 1344 DC, 1344 AC, 1344 MV errors in P frame
    
[h264 @ 0x12758e0] top block unavailable for requested intra4x4 mode -1 at 49 9
    
[h264 @ 0x12758e0] error while decoding MB 49 9, bytestream 4993
    
[h264 @ 0x12758e0] concealing 1228 DC, 1228 AC, 1228 MV errors in P frame
    
Input stream #0:0 frame changed from size:1280x720 fmt:yuvj420p to size:1280x720 fmt:yuv420p
    
frame=    1 fps=0.6 q=-0.0 Lsize=    1350kB time=00:00:04.93 bitrate=2239.5kbits/s    
    
video:1350kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000000%

    Full log of first ffmpeg command line (macOS) :

    ffmpeg version 4.0 Copyright (c) 2000-2018 the FFmpeg developers
    
  built with Apple LLVM version 9.1.0 (clang-902.0.39.1)
    
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.0 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-gpl --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma
    
  libavutil      56. 14.100 / 56. 14.100
    
  libavcodec     58. 18.100 / 58. 18.100
    
  libavformat    58. 12.100 / 58. 12.100
    
  libavdevice    58.  3.100 / 58.  3.100
    
  libavfilter     7. 16.100 /  7. 16.100
    
  libavresample   4.  0.  0 /  4.  0.  0
    
  libswscale      5.  1.100 /  5.  1.100
    
  libswresample   3.  1.100 /  3.  1.100
    
  libpostproc    55.  1.100 / 55.  1.100
    
[h264 @ 0x7fcb3880b600] error while decoding MB 54 2, bytestream -14
    
[h264 @ 0x7fcb3880b600] top block unavailable for requested intra mode -1
    
[h264 @ 0x7fcb3880b600] error while decoding MB 2 9, bytestream 6908
    
[h264 @ 0x7fcb3880b600] concealing 1275 DC, 1275 AC, 1275 MV errors in P frame
    
[h264 @ 0x7fcb3880b600] top block unavailable for requested intra mode -1
    
[h264 @ 0x7fcb3880b600] error while decoding MB 27 0, bytestream 5564
    
[h264 @ 0x7fcb3880b600] deblocking filter parameters 7 13 out of range
    
[h264 @ 0x7fcb3880b600] decode_slice_header error
    
[h264 @ 0x7fcb3880b600] concealing 1440 DC, 1440 AC, 1440 MV errors in P frame
    
[h264 @ 0x7fcb3880b600] deblocking filter parameters 7 -14 out of range
    
[h264 @ 0x7fcb3880b600] decode_slice_header error
    
[h264 @ 0x7fcb3880b600] concealing 1387 DC, 1387 AC, 1387 MV errors in P frame
    
[h264 @ 0x7fcb3880b600] deblocking filter parameters -7 0 out of range
    
[h264 @ 0x7fcb3880b600] decode_slice_header error
    
[h264 @ 0x7fcb3880b600] concealing 1413 DC, 1413 AC, 1413 MV errors in P frame
    
[h264 @ 0x7fcb3880b600] top block unavailable for requested intra mode -1
    
[h264 @ 0x7fcb3880b600] error while decoding MB 9 0, bytestream 6647
    
[h264 @ 0x7fcb3880b600] concealing 1186 DC, 1186 AC, 1186 MV errors in P frame
    
[h264 @ 0x7fcb3880b600] top block unavailable for requested intra mode
    
[h264 @ 0x7fcb3880b600] error while decoding MB 16 9, bytestream 6183
    
[h264 @ 0x7fcb3880b600] top block unavailable for requested intra mode -1
    
[h264 @ 0x7fcb3880b600] error while decoding MB 6 18, bytestream 7043
    
[h264 @ 0x7fcb3880b600] concealing 1440 DC, 1440 AC, 1440 MV errors in P frame
    
[h264 @ 0x7fcb39000400] Stream #0: not enough frames to estimate rate; consider increasing probesize
    
Input #0, h264, from 'temp.h264':
    
  Duration: N/A, bitrate: N/A
    
    Stream #0:0: Video: h264 (High), yuvj420p(pc, progressive), 1280x720, 29.97 fps, 29.97 tbr, 1200k tbn, 59.94 tbc
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (h264 (native) -> rawvideo (native))
    
Press [q] to stop, [?] for help
    
[h264 @ 0x7fcb38003800] error while decoding MB 54 2, bytestream -14
    
[h264 @ 0x7fcb38003800] top block unavailable for requested intra mode -1
    
[h264 @ 0x7fcb38003800] error while decoding MB 2 9, bytestream 6908
    
[h264 @ 0x7fcb38003800] concealing 1275 DC, 1275 AC, 1275 MV errors in P frame
    
[h264 @ 0x7fcb38003e00] top block unavailable for requested intra mode -1
    
[h264 @ 0x7fcb38003e00] error while decoding MB 27 0, bytestream 5564
    
[h264 @ 0x7fcb38003e00] deblocking filter parameters 7 13 out of range
    
[h264 @ 0x7fcb38003e00] decode_slice_header error
    
[h264 @ 0x7fcb38003e00] concealing 1440 DC, 1440 AC, 1440 MV errors in P frame
    
[swscaler @ 0x7fcb3817aa00] deprecated pixel format used, make sure you did set range correctly
    
[h264 @ 0x7fcb3809c000] deblocking filter parameters 7 -14 out of range
    
[h264 @ 0x7fcb3809c000] decode_slice_header error
    
[h264 @ 0x7fcb3809c000] concealing 1387 DC, 1387 AC, 1387 MV errors in P frame
    
Output #0, rawvideo, to 'foo.yuv':
    
  Metadata:
    
    encoder         : Lavf58.12.100
    
    Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 1280x720, q=2-31, 331444 kb/s, 29.97 fps, 29.97 tbn, 29.97 tbc
    
    Metadata:
    
      encoder         : Lavc58.18.100 rawvideo
    
[h264 @ 0x7fcb3809c600] deblocking filter parameters -7 0 out of range
    
[h264 @ 0x7fcb3809c600] decode_slice_header error
    
[h264 @ 0x7fcb3809c600] concealing 1413 DC, 1413 AC, 1413 MV errors in P frame
    
[h264 @ 0x7fcb38003200] top block unavailable for requested intra mode -1
    
[h264 @ 0x7fcb38003200] error while decoding MB 9 0, bytestream 6647
    
[h264 @ 0x7fcb38003200] concealing 1186 DC, 1186 AC, 1186 MV errors in P frame
    
[h264 @ 0x7fcb38003800] top block unavailable for requested intra mode
    
[h264 @ 0x7fcb38003800] error while decoding MB 16 9, bytestream 6183
    
[h264 @ 0x7fcb38003800] top block unavailable for requested intra mode -1
    
[h264 @ 0x7fcb38003800] error while decoding MB 6 18, bytestream 7043
    
[h264 @ 0x7fcb38003800] concealing 1440 DC, 1440 AC, 1440 MV errors in P frame
    
[h264 @ 0x7fcb38003e00] top block unavailable for requested intra mode -1
    
[h264 @ 0x7fcb38003e00] error while decoding MB 12 9, bytestream 6862
    
[h264 @ 0x7fcb38003e00] concealing 1342 DC, 1342 AC, 1342 MV errors in P frame
    
[h264 @ 0x7fcb3809c000] top block unavailable for requested intra mode
    
[h264 @ 0x7fcb3809c000] error while decoding MB 29 18, bytestream 6612
    
[h264 @ 0x7fcb3809c000] concealing 1405 DC, 1405 AC, 1405 MV errors in P frame
    
[h264 @ 0x7fcb3809c600] top block unavailable for requested intra mode
    
[h264 @ 0x7fcb3809c600] error while decoding MB 25 9, bytestream 6050
    
[h264 @ 0x7fcb3809c600] top block unavailable for requested intra mode -1
    
[h264 @ 0x7fcb3809c600] error while decoding MB 70 18, bytestream 5089
    
[h264 @ 0x7fcb3809c600] concealing 1419 DC, 1419 AC, 1419 MV errors in P frame
    
[h264 @ 0x7fcb38003200] top block unavailable for requested intra mode
    
[h264 @ 0x7fcb38003200] error while decoding MB 14 9, bytestream 6071
    
[h264 @ 0x7fcb38003200] deblocking filter parameters -9 0 out of range
    
[h264 @ 0x7fcb38003200] decode_slice_header error
    
[h264 @ 0x7fcb38003200] concealing 1440 DC, 1440 AC, 1440 MV errors in P frame
    
[h264 @ 0x7fcb38003800] top block unavailable for requested intra mode -1
    
[h264 @ 0x7fcb38003800] error while decoding MB 54 9, bytestream 4423
    
[h264 @ 0x7fcb38003800] concealing 1256 DC, 1256 AC, 1256 MV errors in P frame
    
[h264 @ 0x7fcb38003e00] top block unavailable for requested intra mode -1
    
[h264 @ 0x7fcb38003e00] error while decoding MB 22 9, bytestream 5862
    
[h264 @ 0x7fcb38003e00] concealing 1335 DC, 1335 AC, 1335 MV errors in P frame
    
[h264 @ 0x7fcb3809c000] deblocking filter parameters 7 -4 out of range
    
[h264 @ 0x7fcb3809c000] decode_slice_header error
    
[h264 @ 0x7fcb3809c000] concealing 1430 DC, 1430 AC, 1430 MV errors in P frame
    
[h264 @ 0x7fcb3809c600] concealing 1319 DC, 1319 AC, 1319 MV errors in P frame
    
[h264 @ 0x7fcb38003200] top block unavailable for requested intra mode -1
    
[h264 @ 0x7fcb38003200] error while decoding MB 16 9, bytestream 6217
    
[h264 @ 0x7fcb38003200] concealing 1416 DC, 1416 AC, 1416 MV errors in P frame
    
[h264 @ 0x7fcb38003800] top block unavailable for requested intra mode -1
    
[h264 @ 0x7fcb38003800] error while decoding MB 12 0, bytestream 6854
    
[h264 @ 0x7fcb38003800] top block unavailable for requested intra mode -1
    
[h264 @ 0x7fcb38003800] error while decoding MB 2 9, bytestream 7093
    
[h264 @ 0x7fcb38003800] concealing 1440 DC, 1440 AC, 1440 MV errors in P frame
    
[h264 @ 0x7fcb38003e00] top block unavailable for requested intra mode -1
    
[h264 @ 0x7fcb38003e00] error while decoding MB 59 0, bytestream 4955
    
[h264 @ 0x7fcb38003e00] deblocking filter parameters 7 15 out of range
    
[h264 @ 0x7fcb38003e00] decode_slice_header error
    
[h264 @ 0x7fcb38003e00] concealing 1430 DC, 1430 AC, 1430 MV errors in P frame
    
[h264 @ 0x7fcb3809c000] top block unavailable for requested intra mode -1
    
[h264 @ 0x7fcb3809c000] error while decoding MB 34 0, bytestream 5338
    
[h264 @ 0x7fcb3809c000] deblocking filter parameters 7 13 out of range
    
[h264 @ 0x7fcb3809c000] decode_slice_header error
    
[h264 @ 0x7fcb3809c000] concealing 1440 DC, 1440 AC, 1440 MV errors in P frame
    
[h264 @ 0x7fcb3809c600] concealing 1344 DC, 1344 AC, 1344 MV errors in P frame
    
[h264 @ 0x7fcb38003200] top block unavailable for requested intra mode -1
    
[h264 @ 0x7fcb38003200] error while decoding MB 49 9, bytestream 4992
    
[h264 @ 0x7fcb38003200] concealing 1228 DC, 1228 AC, 1228 MV errors in P frame
    
frame=    0 fps=0.0 q=0.0 Lsize=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
    
video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
    
Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)

  • Extract first non black keyframe with FFMPEG

    4 septembre 2013, par Simone Margaritelli

    I'm trying to extract a thumbnail image from a video keyframes using ffmpeg, my command line is :

    ffmpeg -i video.mp4 -vframes 1 -s 200x200 -vf select="eq(pict_type\,PICT_TYPE_I)" -vsync 0 -f image2 video.jpg

    But the keyframe it extracts is totally black (the video starts with a black frame i guess) ... is there a way to automatically extract the first non black keyframe from a video, without seeking to a specific time (i have to manage multiple videos of many durations) ?

    Thanks

  • vsrc_mandelbrot : support coloring the outside white

    27 mars 2013, par Michael Niedermayer

    vsrc_mandelbrot : support coloring the outside white

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