[FFmpeg-trac] #1601(avcodec:open): msmpeg4 reencode MB as intra or picture with higher quantizer if syntax limits are hit (was: msmpeg4v2 enc: blinking square at the bottom-right corner of the video)
FFmpeg
trac at avcodec.org
Wed Aug 15 21:38:32 CEST 2012
#1601: msmpeg4 reencode MB as intra or picture with higher quantizer if syntax
limits are hit
-------------------------------------+-------------------------------------
Reporter: ami_stuff | Owner:
Type: enhancement | Status: open
Priority: normal | Component: avcodec
Version: git-master | Resolution:
Keywords: msmpeg4 | Blocked By:
qscale | Reproduced by developer: 1
Blocking: |
Analyzed by developer: 1 |
-------------------------------------+-------------------------------------
Changes (by michael):
* status: new => open
* reproduced: 0 => 1
* component: undetermined => avcodec
* keywords: => msmpeg4 qscale
* version: unspecified => git-master
* analyzed: 0 => 1
* type: defect => enhancement
Comment:
This is a sideeffect of the motion estimation, bitrate and limitations of
msmpeg4.
You can workaround the issue by using -mbd 2.
Its a bit borderline but i think this is a feature request not so much a
bug. The bug is in the way msmpeg4v2 was designed. MS made a mistake there
in the range that is needed to store coefficients.
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1601#comment:1>
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