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

FFmpeg trac at avcodec.org
Mon May 28 23:28:16 EEST 2018


#7202: mjpeg compression creates laggy video
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             Reporter:  jsteinkamp   |                    Owner:
                 Type:  defect       |                   Status:  closed
             Priority:  normal       |                Component:
              Version:  unspecified  |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |  needs_more_info
Analyzed by developer:  0            |               Blocked By:
                                     |  Reproduced by developer:  0
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Comment (by jsteinkamp):

 HI I have figured out the issue: ffmpeg compresses Photo JPEG with
 yuvj444p 24 bit by default. This compression does not play well on any
 computers since it uses software to decode. yuvj420p plays much better
 since it is 16 bit. Older Adobe After Effects compresses yuvj420p when you
 select medium compression, of course they do not explain any of this. I
 realize Photo JPEG is an older file format, but i really need it because
 the blacks are blacker and it searches well for realtime looping. I still
 believe there is a bit of a lag, when I sync 3 projections using photoJPG
 files, the files created in After Effects run better than files made in
 ffmpeg. The main draw back for using After Effects is it takes much longer
 to make the movie and they stopped supporting this format.

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Ticket URL: <https://trac.ffmpeg.org/ticket/7202#comment:12>
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