Hi,
Stas Oskin wrote:
[...]
> I managed to bring it as close to normal playback as possible, but there are
> 2 severe problems left:
> 1) Very blocky visual quality, while same source, when recorded in constant
> frame rate, produces a smooth, almost block-free visual quality.
I do not know about this problem... The problem in this video looks like the
bitrate is too low. Maybe when you encode at constant frame rate you use a
higher bitrate? Or maybe a lower frame rate?
> 2) The video begins playing back normally, but towards the middle begins to
> stumble significantly. You can see and compare two motions in same file -
> the one at beginning is very smooth, while the middle one is quite jumpy.
This is simply due to the fact that you start with very frequent frames
(the first frames are at about 25fps) and then you gradually increase the
distance between frames (the frame rate keeps decreasing, and at the end of
the video it is about 10.5fps - and video at 10fps is jumpy).
This really does not look like a variable frame rate video...
Looks like there is some kind of clock skew between source and transcoder,
and you are trying to compensate for it by decreasing the frame rate over
time... But this cannot work (will give very bad video).
Luca
_______________________________________________
libav-user mailing list
[email protected]
https://lists.mplayerhq.hu/mailman/listinfo/libav-user
