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  • ffmpeg avcodec_decode_video2 function error codes

    7 mai 2018, par gaby

    i use at the function avcodec_decode_video2 at the flowing way:

    if (packet.isEOF()) {
    AVPacket eofpkt;
    av_init_packet(&eofpkt);
    eofpkt.data = NULL;
    eofpkt.size = 0;
    ret = avcodec_decode_video2(d.codec_ctx, d.frame, &got_frame_ptr, &eofpkt);
} else {
    ret = avcodec_decode_video2(d.codec_ctx, d.frame, &got_frame_ptr, (AVPacket*)packet.asAVPacket());
}
//qDebug("pic_type=%c", av_get_picture_type_char(d.frame->pict_type));
d.undecoded_size = qMin(packet.data.size() - ret, packet.data.size());
if (ret < 0) {
    //qWarning("[VideoDecoderFFmpegBase] %s", av_err2str(ret));
    return false;
}
if (!got_frame_ptr) {
    qWarning("no frame could be decompressed: %s %d/%d", av_err2str(ret), d.undecoded_size, packet.data.size());
    return !packet.isEOF();
}

    When i run it I get an error (I go inside if(!got_frame_ptr) ) and in the printing i get that ret value's is: 203,3053,5120 (or more accurate tis is my printings:

    Warning: "no frame could be decompressed: Error number 203 occurred 0/203" Warning: "no frame could be decompressed: Error number 3053 occurred 0/3053" Warning: "no frame could be decompressed: Error number 5120 occurred 0/5120"

    (av_err2str(ret) just print decorated ret, nothing more))

    the avcodec_decode_video2 docomentatin said: On error a negative value is returned, otherwise the number of bytes used or zero if no frame could be decompressed.

    i'm not in situation that avcodec_decode_video2 return me negative value, but i do get zero at got_frame_ptr , instead of got_frame_ptr will be the same value as ret like doc. said i get this odd value (203,3053,5120).

    my questions is:

    1. what this error code means? (i search at ffmpeg doc. and i didn't found a good record on what every numeric value should represent)

    2. why i get this values from this function? is it ffmpeg bug? or did i didn't understand ffmpeg currectly?

    thank you g.

  • Can't create thumbnail with ffmpeg

    7 mai 2018, par Kirk Stepler

    I can not create a preview for a video with 4k resolution. Setting: docker image ubuntu 16.04

    ffmpeg -i file.MOV -ss 00:00:00 -vframes 1 thumbnail.png

    Stream mapping:
  Stream #0:0 -> #0:0 (hevc (native) -> png (native))
Press [q] to stop, [?] for help
Killed

  • Building and packaging a portable ffmpeg Linux program ('GLIBC_2.27' not found) [duplicate]

    7 mai 2018, par Blue4Whale

    This question already has an answer here:

    I am trying to build a portable version of ffmpeg to run on major Linux distributions, with the final user only having to extract the distributed targz package to the appropriate directory.

    My previous builds on Ubuntu 16.04 worked fine. I upgraded to Ubuntu 18.04 and new builds, when run on Fedora 27 with LD_LIBRARY_PATH=. ./ffmpeg, show errors:

    ./ffmpeg: /lib64/libm.so.6: version `GLIBC_2.27' not found (required by ./libavfilter.so.7)
./ffmpeg: /lib64/libc.so.6: version `GLIBC_2.27' not found (required by ./libavformat.so.58)

    Which i interpret as the libavxxx libraries want to dynamically link against system libraries libc and libm that would have been compiled with GLIBC_2.27, but those libs have been compiled with an older GLIBC version.

    Note that the fact the errors show from libavxxx.so is not the point, as if i compile ffmpeg as a fat binary (libavxxx linked statically), i get the same error from ffmpeg.

    The only workaround i have found so far is to copy the build system libc.so.6 and libm.so.6 libraries to the directory containing the binaries and make them part of the ffmpeg package.

    Is there a better way to handle this issue ?

  • FFmpeg videos not working on QuickPlayer (and therefore on OpenCV)

    7 mai 2018, par Gabrielle

    I know that there are several posts about FFMpeg not working on QuickPlayer (and OpenCV) and other players supporting only YUV planar color space, but NONE of the solutions I've found worked for me.

    I need it to run on OpenCV, but as far as I found, it will never run on OpenCV if it is not running on QuickPlayer, so, I think I might start fixing the QuickPlayer issue. The generated video is a screen record, and it works perfectly on VLC.

    Configurations used:

    MacOs High Sierra
ffmpeg version 4.0 (installed with: --with-opus --with-libvpx )
opencv version 3.4.1_4
Homebrew 1.6.2 (used to install ffmpeg and opencv)

    Command used to record the video:

    ffmpeg -f avfoundation -video_size 1980x1140 -framerate 30 -i '1' 
-vcodec libx264 -preset ultrafast -an -qp 0 -pix_fmt yuv444p video.mkv -y

    Note1: I already tried to change -pix_fmt to yuv420p

    Note2: I already tried to add -vf scale=640:-2,format=yuv420p

    Note3: I already tried to re-install OpenCV --with-ffmpeg

    Note4: I tried mkv, mp4, avi. I really don't care about the extension, I just need it to work.

    Note5: I need it to be a cross-plataform solution, as far as I read ffmpeg should work in all OS, but first I am trying to fix on mac and then I will check others...

    Any ideas? Maybe a missing flag? A missing library?

    @Gyan suggested me to change the qp flag to a number higher than 0, I did it

    ffmpeg -f avfoundation -video_size 1980x1140 -framerate 30 -i '1' -vcodec libx264 -preset ultrafast -an -qp 2 -pix_fmt yuv444p video_test.mp4 -y

    This is my output:

    ffmpeg version 4.0 Copyright (c) 2000-2018 the FFmpeg developers
  built with Apple LLVM version 9.0.0 (clang-900.0.39.2)
  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-ffplay --enable-frei0r --enable-libass --enable-libfdk-aac --enable-libfontconfig --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopus --enable-librtmp --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma --enable-libopenjpeg --disable-decoder=jpeg2000 --extra-cflags=-I/usr/local/Cellar/openjpeg/2.3.0/include/openjpeg-2.3 --enable-nonfree
  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
[avfoundation @ 0x7fbb8f80ee00] Selected pixel format (yuv420p) is not supported by the input device.
[avfoundation @ 0x7fbb8f80ee00] Supported pixel formats:
[avfoundation @ 0x7fbb8f80ee00]   uyvy422
[avfoundation @ 0x7fbb8f80ee00]   yuyv422
[avfoundation @ 0x7fbb8f80ee00]   nv12
[avfoundation @ 0x7fbb8f80ee00]   0rgb
[avfoundation @ 0x7fbb8f80ee00]   bgr0
[avfoundation @ 0x7fbb8f80ee00] Overriding selected pixel format to use uyvy422 instead.
[avfoundation @ 0x7fbb8f80ee00] Stream #0: not enough frames to estimate rate; consider increasing probesize
Input #0, avfoundation, from '1':
  Duration: N/A, start: 118955.291667, bitrate: N/A
    Stream #0:0: Video: rawvideo (UYVY / 0x59565955), uyvy422, 1440x900, 1000k tbr, 1000k tbn, 1000k tbc
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[mp4 @ 0x7fbb8f87d200] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
[libx264 @ 0x7fbb8f87f600] MB rate (5130000000) > level limit (16711680)
[libx264 @ 0x7fbb8f87f600] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
[libx264 @ 0x7fbb8f87f600] profile High 4:4:4 Predictive, level 6.2, 4:4:4 8-bit
[libx264 @ 0x7fbb8f87f600] 264 - core 152 r2854 e9a5903 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=6 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=cqp mbtree=0 qp=2 ip_ratio=1.40 aq=0
Output #0, mp4, to 'video_test.mp4':
  Metadata:
    encoder         : Lavf58.12.100
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv444p, 1440x900, q=-1--1, 1000k fps, 1000k tbn, 1000k tbc
    Metadata:
      encoder         : Lavc58.18.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1

  • Concatenating two videos with different width and height

    7 mai 2018, par Tahtakafa

    If i try to concatenate two videos it throws an error due to different screen sizes of the videos. I have put a setdat=16/9 parameter like described here for each two video. Then i got the error below. How can i concatenate two videos with different screen sizes?

    code:

    ffmpeg -i /var/www/html/GetVideo/reklam/muzikli1.mp4 -i /var/www/html/GetVideo/tempvideo/sample.mp4 -filter_complex \ "[0]setdar=16/9[a];[1]setdar=16/9[b]; \ [a][b]concat=n=2:v=1:a=1" /var/www/html/GetVideo/reklam/out.mp4

    error:

    pi@raspberrypi:/var/www/html/GetVideo $ ffmpeg -i /var/www/html/GetVideo/reklam/muzikli1.mp4 -i /var/www/html/GetVideo/tempvideo/sample.mp4 -filter_complex \ "[0]setdar=16/9[a];[1]setdar=16/9[b]; \ [a][b]concat=n=2:v=1:a=1" /var/www/html/GetVideo/reklam/out.mp4
ffmpeg version git-2018-05-06-652b857 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 6.3.0 (Raspbian 6.3.0-18+rpi1+deb9u1) 20170516
  configuration: --arch=armel --target-os=linux --enable-gpl --enable-libx264 --enable-nonfree
  libavutil      56. 18.100 / 56. 18.100
  libavcodec     58. 19.101 / 58. 19.101
  libavformat    58. 13.101 / 58. 13.101
  libavdevice    58.  4.100 / 58.  4.100
  libavfilter     7. 21.100 /  7. 21.100
  libswscale      5.  2.100 /  5.  2.100
  libswresample   3.  2.100 /  3.  2.100
  libpostproc    55.  2.100 / 55.  2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/var/www/html/GetVideo/reklam/muzikli1.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: mp41isom
  Duration: 00:00:13.35, start: 0.000000, bitrate: 244 kb/s
    Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 918x512 [SAR 1:1 DAR 459:256], 110 kb/s, 5 fps, 5 tbr, 5k tbn, 10k tbc (default)
    Metadata:
      handler_name    : VideoHandler
      encoder         : AVC Coding
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 129 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '/var/www/html/GetVideo/tempvideo/sample.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf57.65.100
  Duration: 00:00:25.57, start: 0.000000, bitrate: 1015 kb/s
    Stream #1:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720, 896 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #1:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 113 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
[AVFilterGraph @ 0x2fa9a20] No such filter: ' '
Error initializing complex filters.
Invalid argument

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