Andy Furniss wrote:
Doesn't affect ffmpeg -ss but interactive seeking on very large aac
(adts) files is way out with current ffplay, mpv and mplayer.
Pressing "up" to skip forward a minute ends up at 1:37:xx on one
sample.
Making the samples smaller reduces the effect so it wouldn't be seen
on a "normal" length sample. The samples I am testing are half gig
3-4 hour radio recordings.
More playing - it's not just aac. I tried with some generated files and
it's reproduceable with those if long enough.
Noticed some wierds with aac encoder on the way.
ffm -f lavfi -i "sine=frequency=800:duration=7200" -c:a aac -b:a 320k
test.aac
works and produces seek issue but is very slow - speed = 4x and not 320k.
Omitting the -b:a 320k speed is 24x, still slowish.
Try above with both aac replaced by ac3 speed= 456x bitrate is 320k but
no seek issue.
Repeat ac3 with duration=14400 and the seek issue is there.
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