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  • Cutting movie with ffmpeg result in audio/video desync

    15 mai 2020, par T4ng10r

    I've concate long ago set of movies taken during some lecture. Now I want to cut them for each question/answer.

    



    I do it like this.

    



    


    ffmpeg -ss 00:00:34.7 -t 00:10:44.6 -y -i input_movie.mp4 -vcodec copy -acodec copy output_1.mp4

    
 


    ffmpeg -ss 00:11:22.2 -y -i input_movie.mp4 -vcodec copy -acodec copy output_2.mp4

    


    



    Yet, for the second part I can't set proper starting point so audio and video would be in sync.
    
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  • ffmpeg converting JPG slideshow to MKV

    17 décembre 2018, par phol

    I am trying to convert a set of jpg files to a slideshow with varying durations using ffconcat

    output.txt contents :

    ffconcat version 1.0
    
file slide_0001.jpg
    
duration 0.163
    
file slide_0002.jpg
    
duration 0.533
    
file slide_0003.jpg
    
duration 1.067
    
file slide_0004.jpg
    
duration 0.533
    
file slide_0005.jpg
    
etc.

    FFmpeg command :

    ffmpeg -i output.txt output.mkv

    I also tried :

    ffmpeg -i output.txt -c:v copy output.mkv

    However, when converting, the colours of the images become skewed.
    White becomes pink / purple and dark green becomes light green.
    The same happens when choosing different codecs and containers.
    Is there a way to solve this ?

    EDIT :
    I performed the same conversion again. I attached the log output as requested.
    However, in the meantime I have figured out that converting without ffconcat duration and then altering timecodes with mp4fpsmod is more efficient in terms of storage (3 vs 40 MB) and gives less issues in different players. The result is nonetheless the same : colours are still wrong, both on my workstation (Ubuntu 18.04) and laptop (macOS Mojave).

    I tried to alter things with pix_fmt and -vf format as can be seen in the second log output. This did not solve the problem.

    Background info :
    The input jpg files are from a lecture recording made with MediaSite, which has both a video stream for the room as well as this slideshow stream for the slides.

    Example of input :
    Input image
    Example of output :
    Screenshot of output
    log output MKV conversion :

        $ ffmpeg -i outputnew.txt output12345.mkv
    
ffmpeg version 4.1 Copyright (c) 2000-2018 the FFmpeg developers
    
built with Apple LLVM version 10.0.0 (clang-1000.11.45.5)
    
configuration: --prefix=/usr/local/Cellar/ffmpeg/4.1 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gpl --enable-libmp3lame --enable-libopus --enable-libsnappy --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-opencl --enable-videotoolbox
    
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 'outputnew.txt':
    
Duration: N/A, start: 0.000000, bitrate: N/A
    
    Stream #0:0: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 1280x720, 25 tbr, 25 tbn, 25 tbc
    
Stream mapping:
    
Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
    
Press [q] to stop, [?] for help
    
[libx264 @ 0x7fb284802800] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
    
[libx264 @ 0x7fb284802800] profile High 4:4:4 Predictive, level 3.1, 4:4:4 8-bit
    
[libx264 @ 0x7fb284802800] 264 - core 152 r2854 e9a5903 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=4 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    
Output #0, matroska, to 'output12345.mkv':
    
Metadata:
    
    encoder         : Lavf58.20.100
    
    Stream #0:0: Video: h264 (libx264) (H264 / 0x34363248), yuvj444p(pc), 1280x720, q=-1--1, 25 fps, 1k tbn, 25 tbc
    
    Metadata:
    
    encoder         : Lavc58.35.100 libx264
    
    Side data:
    
    cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    
[mjpeg @ 0x7fb284061200] EOI missing, emulating=00:02:12.96 bitrate= 491.3kbits/s speed=14.3x        
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte= 487.2kbits/s speed=14.3x    
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte= 333.0kbits/s speed=22.3x    
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte= 338.8kbits/s speed=22.7x    
    
    Last message repeated 2 times
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte= 164.7kbits/s speed=41.6x    
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte= 122.7kbits/s speed=55.7x    
    
    Last message repeated 1 times
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte= 111.2kbits/s speed=60.5x    
    
    Last message repeated 1 times
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte= 105.3kbits/s speed=64.4x    
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  82.2kbits/s speed=82.7x    
    
    Last message repeated 1 times
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  79.7kbits/s speed=85.8x    
    
    Last message repeated 2 times
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  59.7kbits/s speed= 114x    
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  53.8kbits/s speed= 127x    
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  54.7kbits/s speed= 124x    
    
    Last message repeated 1 times
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  47.1kbits/s speed= 143x    
    
    Last message repeated 1 times
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  47.0kbits/s speed= 144x    
    
    Last message repeated 1 times
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  44.6kbits/s speed= 151x    
    
    Last message repeated 1 times
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  34.4kbits/s speed= 194x    
    
    Last message repeated 2 times
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  32.9kbits/s speed= 204x    
    
    Last message repeated 2 times
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  32.8kbits/s speed= 203x    
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  32.6kbits/s speed= 202x    
    
    Last message repeated 1 times
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  28.8kbits/s speed= 229x    
    
    Last message repeated 2 times
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  27.9kbits/s speed= 236x    
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  27.9kbits/s speed= 233x    
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  23.9kbits/s speed= 274x    
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  24.2kbits/s speed= 273x    
    
    Last message repeated 2 times
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  24.2kbits/s speed= 274x    
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  24.0kbits/s speed= 276x    
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  24.2kbits/s speed= 273x    
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  23.6kbits/s speed= 278x    
    
    Last message repeated 1 times
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  23.7kbits/s speed= 279x    
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  23.6kbits/s speed= 279x    
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  24.0kbits/s speed= 276x    
    
    Last message repeated 1 times
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  23.5kbits/s speed= 281x    
    
    Last message repeated 1 times
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  20.4kbits/s speed= 325x    
    
[mjpeg @ 0x7fb28502a000] EOI missing, emulating
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  20.1kbits/s speed= 329x    
    
    Last message repeated 1 times
    
[matroska @ 0x7fb284812e00] Starting new cluster due to timestampte=  20.1kbits/s speed= 330x    
    
frame=  635 fps= 14 q=-1.0 Lsize=   37389kB time=04:22:06.76 bitrate=  19.5kbits/s speed= 343x    
    
video:37378kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.029620%
    
[libx264 @ 0x7fb284802800] frame I:16    Avg QP:11.98  size:154224
    
[libx264 @ 0x7fb284802800] frame P:184   Avg QP:13.30  size: 79029
    
[libx264 @ 0x7fb284802800] frame B:435   Avg QP:13.19  size: 48887
    
[libx264 @ 0x7fb284802800] consecutive B-frames:  6.0%  4.4% 10.9% 78.7%
    
[libx264 @ 0x7fb284802800] mb I  I16..4: 55.7%  0.0% 44.3%
    
[libx264 @ 0x7fb284802800] mb P  I16..4: 32.4%  0.0% 21.5%  P16..4: 13.3% 15.1% 11.3%  0.0%  0.0%    skip: 6.4%
    
[libx264 @ 0x7fb284802800] mb B  I16..4: 17.8%  0.0%  7.2%  B16..8: 19.1% 19.4%  6.5%  direct:14.6%  skip:15.3%  L0:47.0% L1:38.9% BI:14.1%
    
[libx264 @ 0x7fb284802800] coded y,u,v intra: 63.7% 26.1% 56.3% inter: 46.5% 24.6% 43.5%
    
[libx264 @ 0x7fb284802800] i16 v,h,dc,p: 19% 18% 58%  4%
    
[libx264 @ 0x7fb284802800] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 35% 20% 25%  4%  4%  3%  3%  3%  3%
    
[libx264 @ 0x7fb284802800] Weighted P-Frames: Y:5.4% UV:5.4%
    
[libx264 @ 0x7fb284802800] ref P L0: 43.2%  4.4% 30.8% 21.4%  0.2%
    
[libx264 @ 0x7fb284802800] ref B L0: 64.1% 27.3%  8.6%
    
[libx264 @ 0x7fb284802800] ref B L1: 85.3% 14.7%
    
[libx264 @ 0x7fb284802800] kb/s:19.25

    Log output mp4 conversion :

    $ ffmpeg -i slide_%04d.jpg -vf format=rgba -pix_fmt yuv420p -vcodec libx264 -movflags +faststart -preset veryslow output12345.mp4
    
ffmpeg version 4.1 Copyright (c) 2000-2018 the FFmpeg developers
    
built with Apple LLVM version 10.0.0 (clang-1000.11.45.5)
    
configuration: --prefix=/usr/local/Cellar/ffmpeg/4.1 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gpl --enable-libmp3lame --enable-libopus --enable-libsnappy --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-opencl --enable-videotoolbox
    
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, image2, from 'slide_%04d.jpg':
    
Duration: 00:00:25.36, start: 0.000000, bitrate: N/A
    
    Stream #0:0: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 1280x720, 25 fps, 25 tbr, 25 tbn, 25 tbc
    
File 'output12345.mp4' already exists. Overwrite ? [y/N] y
    
Stream mapping:
    
Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
    
Press [q] to stop, [?] for help
    
[swscaler @ 0x7fb7e280b000] deprecated pixel format used, make sure you did set range correctly
    
[libx264 @ 0x7fb7e1803c00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
    
[libx264 @ 0x7fb7e1803c00] profile High, level 5.0
    
[libx264 @ 0x7fb7e1803c00] 264 - core 152 r2854 e9a5903 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=1 ref=16 deblock=1:0:0 analyse=0x3:0x133 me=umh subme=10 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=24 chroma_me=1 trellis=2 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=8 b_pyramid=2 b_adapt=2 b_bias=0 direct=3 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=60 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    
Output #0, mp4, to 'output12345.mp4':
    
Metadata:
    
    encoder         : Lavf58.20.100
    
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1280x720, q=-1--1, 25 fps, 12800 tbn, 25 tbc
    
    Metadata:
    
    encoder         : Lavc58.35.100 libx264
    
    Side data:
    
    cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    
[mp4 @ 0x7fb7e1801800] Starting second pass: moving the moov atom to the beginning of the file     
    
frame=  634 fps=8.5 q=-1.0 Lsize=    2252kB time=00:00:25.24 bitrate= 731.0kbits/s speed=0.337x    
    
video:2245kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.307448%
    
[libx264 @ 0x7fb7e1803c00] frame I:5     Avg QP:19.12  size: 49393
    
[libx264 @ 0x7fb7e1803c00] frame P:131   Avg QP:22.18  size:  9379
    
[libx264 @ 0x7fb7e1803c00] frame B:498   Avg QP:23.78  size:  1652
    
[libx264 @ 0x7fb7e1803c00] consecutive B-frames:  3.2%  1.6%  3.3% 29.7%  7.9% 16.1%  7.7% 16.4% 14.2%
    
[libx264 @ 0x7fb7e1803c00] mb I  I16..4: 45.7% 37.9% 16.4%
    
[libx264 @ 0x7fb7e1803c00] mb P  I16..4:  6.0%  5.3%  1.3%  P16..4: 19.9%  1.9%  3.7%  0.3%  0.1%    skip:61.5%
    
[libx264 @ 0x7fb7e1803c00] mb B  I16..4:  0.3%  0.4%  0.1%  B16..8: 17.5%  1.0%  0.2%  direct: 0.3%  skip:80.2%  L0:52.3% L1:46.9% BI: 0.8%
    
[libx264 @ 0x7fb7e1803c00] 8x8 transform intra:43.0% inter:48.9%
    
[libx264 @ 0x7fb7e1803c00] direct mvs  spatial:99.2% temporal:0.8%
    
[libx264 @ 0x7fb7e1803c00] coded y,uvDC,uvAC intra: 16.9% 25.8% 16.6% inter: 1.1% 1.9% 1.2%
    
[libx264 @ 0x7fb7e1803c00] i16 v,h,dc,p: 61% 28%  6%  6%
    
[libx264 @ 0x7fb7e1803c00] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 20%  9% 50%  3%  4%  3%  3%  3%  5%
    
[libx264 @ 0x7fb7e1803c00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 18% 23% 19%  5%  7%  6%  6%  5% 10%
    
[libx264 @ 0x7fb7e1803c00] i8c dc,h,v,p: 46% 40% 13%  1%
    
[libx264 @ 0x7fb7e1803c00] Weighted P-Frames: Y:5.3% UV:5.3%
    
[libx264 @ 0x7fb7e1803c00] ref P L0: 33.2%  3.1% 11.6%  7.3%  8.8%  6.4%  6.5%  3.1%  3.2%  2.6%  2.4%  2.5%  2.8%  2.8%  2.3%  1.4%
    
[libx264 @ 0x7fb7e1803c00] ref B L0: 42.0% 15.1% 12.0%  5.4%  4.9%  4.3%  4.0%  1.9%  2.0%  1.8%  1.7%  1.8%  1.7%  1.1%  0.5%
    
[libx264 @ 0x7fb7e1803c00] ref B L1: 83.5% 16.5%
    
[libx264 @ 0x7fb7e1803c00] kb/s:725.10

    Player :
    QuickTime, VLC and Kodi on both Linux and Mac.

    EDIT 2 :
    Input files : https://drive.google.com/open?id=1kbBkSDSwe6ywgQ8lkjqkh-MKCzGA4bj8

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