[FFmpeg-trac] #3651(avcodec:new): Lagarith and UT Video Codec has Bad Performance

FFmpeg trac at avcodec.org
Sun May 18 04:32:11 CEST 2014

#3651: Lagarith and UT Video Codec has Bad Performance
             Reporter:  Zerowalker   |                     Type:
               Status:  new          |  enhancement
            Component:  avcodec      |                 Priority:  normal
             Keywords:               |                  Version:
             Blocking:               |  unspecified
Analyzed by developer:  0            |               Blocked By:
                                     |  Reproduced by developer:  0
 Summary of the bug:
 Not really sure if i am supposed to write these things here, as it's not
 really a bug, but here goes.

 LAV Filter use ffmpeg for Decoding, and hence i direct this here.

 The performance in decoding Lagarith and UT Video Codec are extremely bad,
 most of the time it's over 100% slower.

 Originally i thought it was faster, either i have been mistaken or
 something has happened.

 However, worth noting, Lagarith is limited to 2 threads in it's original
 decoder, however comparing the performance make this insignificant as
 ffmpeg will use more and still not be at the same pace.

 How to reproduce:

 Pretty sure you can just use:

 ffmpeg -i "lagarith.avi" -o "Raw.avi"

 so just decode a lagarith file to raw, and you will see the performance,
 than compare it to using the original decoder.

Ticket URL: <https://trac.ffmpeg.org/ticket/3651>
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