On 4/3/2018 8:55 PM, Adam Nielsen wrote:
I've had a look through the manpage but I can't find any options that
can do this. The -r and -vsync options seem to only drop frames to
match a constant framerate (rather than trying to minimise latency) and
-frame_drop_threshold looks to be similar, keeping up with timestamps
rather than affecting latency.
Do you -need- full-rate motion?
It sounds like you need to drop frames to match a constant FR that you then
transcode. You might be able to use the framestep filter to discard every
other frame, transcode, then use -r to set the desired output rate which
will dup frames to fill the time. (I have not tried this myself.)
There's a some vaguely apropos answer regarding framestep at
https://video.stackexchange.com/questions/16552/4x-resample-videoframes-using-ffmpeg.
Later,
z!
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