#1483: Allow a list of keyframe numbers that are valid for starting a new
segment
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Reporter: gordon | Type: enhancement
Status: new | Priority: normal
Component: avformat | Version: unspecified
Keywords: segment | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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It would be beneficial to have an option with the segmenter to white list
keyframes that can be used to start new segments. The duration of the
segment would not cause a new segment to be created until a keyframe in
the white list is reached.
This will allow videos that have a subset of common keyframes to be
segmented and maintain common starting points. Otherwise, a constant gop
is required which is not optimal.
My feature request will allow the encoder to optimize keyframe placement
for different quality levels of the encode in variant streams without
risking playback getting out of sync between the variant streams which
makes swapping between streams impossible.
Adding a command line option to input a comma separated list of frame
numbers would be an easy way to implement this. Then the list can be
checked against the current frame number when outputting packets into
segments.
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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1483>
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