[FFmpeg-user] h264_vaapi missing frames

Carl Eugen Hoyos ceffmpeg at gmail.com
Fri Mar 23 17:10:48 EET 2018

2018-03-23 14:31 GMT+01:00, Gyan Doshi <gyandoshi at gmail.com>:
> On 3/23/2018 6:45 PM, Carl Eugen Hoyos wrote:
>> 2018-03-23 14:12 GMT+01:00, Mark Thompson <sw at jkqxz.net>:
>>> This is still duplicating a very large number of frames for video sync.
>>> As suggested previously, please try with video sync disabled
>>> ("-vsync 0") or without audio.
>> To the best of my knowledge, this would produce an invalid output file:
>> The input is not cfr, FFmpeg's mov output does not support vfr.
> How are you assessing validity

The author of the mov muxer has repeatedly confirmed this,
there is a old commit that clarifies it.

> or what would be needed to make the output valid?
> Is there a particular conformance tool or some part of the
> QT or MPEG-4 specs that you have in mind?

I don't know, sorry.

Carl Eugen

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