[FFmpeg-trac] #3091(undetermined:new): High Bitrate I-frame CBR MPEG encoding causes error
FFmpeg
trac at avcodec.org
Wed Oct 30 05:35:47 CET 2013
#3091: High Bitrate I-frame CBR MPEG encoding causes error
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Reporter: ortoni | Owner:
Type: defect | Status: new
Priority: normal | Component:
Version: unspecified | undetermined
Keywords: | Resolution:
Blocking: | Blocked By:
Analyzed by developer: 0 | Reproduced by developer: 0
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Comment (by ortoni):
The difficulty with adding a -bt flag (10M seems to work) is that the
stream is then marked as VBR instead of CBR, and the encoded frames are no
longer the expected constant size. The actual encoded size I worked out to
be max about 100Mbit/sec. The aim is to achieve a CBR I frame encoding
similar to IMX.
I guess if the -bt default were to scale with bitrate, that would make
sense, as then the resulting bitstream would be constant frame size and
marked as CBR(?)
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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/3091#comment:4>
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