[FFmpeg-trac] #6217(ffmpeg:new): Ffmpeg ignores bitrate parameter when encoding with libxvid at 2nd pass
FFmpeg
trac at avcodec.org
Tue Mar 28 03:24:14 EEST 2017
#6217: Ffmpeg ignores bitrate parameter when encoding with libxvid at 2nd pass
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Reporter: danieldc | Owner:
Type: defect | Status: new
Priority: normal | Component: ffmpeg
Version: unspecified | Resolution:
Keywords: ffmpeg | Blocked By:
libxvid dual pass | Reproduced by developer: 0
Blocking: |
Analyzed by developer: 0 |
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Comment (by edumj):
Well, 2014 versions also lacks bitrate enforcement with 2 pass, but there
was no such great difference between desired bitrate and the resulting
one:
libxvid (2017) 1.111k 2 pass (-g 12) -> Bitrate 2.875k!! and Peak
23.133k!!!!
libxvid (2014) 1.111k 2 pass (-g 12) -> Bitrate 1.466k! and Peak 9.671k
And, with a gop of 250:
libxvid (2017) 1.111k 2 pass -g 250 -> Bitrate 2.201k!! and Peak
22.937k!!!!
libxvid (2014) 1.111k 2 pass -g 250 -> Bitrate 1.283k! and Peak 11.854k!
Also, any ideas how to control maximum bitrate peaks?
Thanks.
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Ticket URL: <https://trac.ffmpeg.org/ticket/6217#comment:3>
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