[FFmpeg-trac] #7202(undetermined:new): mjpeg compression creates laggy video

[FFmpeg]

#7202: mjpeg compression creates laggy video
-------------------------------------+-------------------------------------
             Reporter:  jsteinkamp   |                     Type:  defect
               Status:  new          |                 Priority:  important
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:  mjpeg        |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 When I create mjpeg mov files with ffmpeg the mov file skips frames
 to keep up with the framerate, it does not seem to be decoding correctly.
 I included the same file created with Adobe After Effects for comparison.
 I have been able to reproduce this multiple times on various players.
 Quicktime 7 shows the problem the most. Larger pixel resolution files are
 worse.
 I would love to be able to use ffmpeg because it is much faster to work
 with.
 download 172MB example files from: http://jsteinkamp.com/mjp_test.zip
 How to reproduce:
 {{{
 ffmpeg -i input -vcodec mjpeg -q:v 8 -f mov output.mov
 ffmpeg version N-91024-g293a6e8332
   built with gcc 7.3.0 (GCC)
   configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-
 bzlib --e
 nable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-
 libblur
 ay --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb
 --enable-
 libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine
 --enab
 le-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame
 --enable-li
 bvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-
 libx265 --en
 able-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp
 --enable-
 libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa
 --enabl
 e-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf
 --enabl
 e-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec
 --enab
 le-dxva2 --enable-avisynth
   libavutil      56. 18.100 / 56. 18.100
   libavcodec     58. 19.101 / 58. 19.101
   libavformat    58. 13.102 / 58. 13.102
   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, image2, from 'tiffs\hibiscus1.%04d.tif':
   Duration: 00:00:06.67, start: 0.000000, bitrate: N/A
     Stream #0:0: Video: tiff, rgba, 1024x768 [SAR 1:1 DAR 4:3], 30 fps, 30
 tbr,
 30 tbn, 30 tbc
 Stream mapping:
   Stream #0:0 -> #0:0 (tiff (native) -> mjpeg (native))
 Press [q] to stop, [?] for help
 Incompatible pixel format 'rgba' for codec 'mjpeg', auto-selecting format
 'yuvj4
 44p'
 [swscaler @ 000000000281a800] deprecated pixel format used, make sure you
 did se
 t range correctly
 Output #0, mov, to 'hibiscus1_ffmpeg_mjpeg.mov':
   Metadata:
     encoder         : Lavf58.13.102
     Stream #0:0: Video: mjpeg (jpeg / 0x6765706A), yuvj444p(pc), 1024x768
 [SAR 1
 :1 DAR 4:3], q=2-31, 200 kb/s, 30 fps, 15360 tbn, 30 tbc
     Metadata:
       encoder         : Lavc58.19.101 mjpeg
     Side data:
       cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
 frame=   76 fps=0.0 q=8.0 size=    4096kB time=00:00:02.43
 bitrate=13789.2kbits/
 frame=  157 fps=156 q=8.0 size=    8704kB time=00:00:05.13
 bitrate=13890.1kbits/
 frame=  200 fps=157 q=8.0 Lsize=   11530kB time=00:00:06.63
 bitrate=14238.8kbits
 /s speed= 5.2x
 video:11528kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing
  overhead: 0.014147%
 }}}
 Patches should be submitted to the ffmpeg-devel mailing list and not this
 bug tracker.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/7202>
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