[FFmpeg-trac] #6217(ffmpeg:new): Ffmpeg ignores bitrate parameter when encoding with libxvid at 2nd pass
FFmpeg
trac at avcodec.org
Sat Mar 25 17:05:13 EET 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):
And it gets worse without -g 250 (using default gop size and bitrate
1500k, results in 2617k! with a maxium Peak of 19524k!!):
libxvid 1500k 2 Pass -g 250 -> Bitrate 1917k! and Peak 18793k!
libxvid 1500k 2 Pass (-g 12)-> Bitrate 2617k!! and Peak 19524k!
But, only with 1 pass and a normal gop of 250, it doesn't reach desired
bitrate at all:
libxvid 2000k 1 Pass -g 250 -> Bitrate 1572k!
libxvid 2000k 1 Pass (-g 12) -> Bitrate 1969k
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Ticket URL: <https://trac.ffmpeg.org/ticket/6217#comment:2>
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