[Libav-user] formats that support variable frame rate

[YIRAN LI]

2017-01-30 9:51 GMT+11:00 YIRAN LI <mrfun.china at gmail.com>:

>
>
> 2017-01-24 15:54 GMT+11:00 YIRAN LI <mrfun.china at gmail.com>:
>
>>
>>
>> 2017-01-24 10:57 GMT+11:00 Carl Eugen Hoyos <ceffmpeg at gmail.com>:
>>
>>> 2017-01-23 18:31 GMT+01:00 John Stebbins <stebbins at jetheaddev.com>:
>>> > What I know about muxers is:
>>> >
>>> > MP4,MOV - yes
>>>
>>> Just to make sure:
>>> libavformat does not support vfr in mov (but avi works fine)
>>>
>>> ​Hi Carl,
>>
>> This is the mov file I generated with ffmpeg-2.2.1 which is a quite old
>> version. https://dl.dropboxusercontent.com/u/89678527/30.mov
>>
>> The frames I send to av_write_frame is in total 1 min long. 30 fps in
>> first 1/3 min, 30*3/4 fps in 2nd 1/3 min, 30 * 1/2 fps in 3rd 1/3 min.
>>
>> While you say libavformat doesn't support vfr in mov, that file plays
>> quite well. Could you have a look at the file to see if there's any problem?
>>
>> Thanks
>>
>
> Hi Carl,
>
> Could you elaborate how/why ffmpeg's implementation of mov is unable to
> produce valid vfr videos because we do need to support vfr output via
> ffmpeg.
>
> Thanks
>

​Hi Carl,

I found this in the mail list. Is this still the reason for possible
problem in MP4 vfr. Does it mean as long as I guarantee frame time stamps
starts from 0 and are monotonic increasing then
the generated mov/mp4 will be good for all players and editors?

Thanks​


​

>      ​
>
>>
>> Please remember to not top-post here, it is considered rude.
>>>
>>> Carl Eugen
>>> _______________________________________________
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>>> Libav-user at ffmpeg.org
>>> http://ffmpeg.org/mailman/listinfo/libav-user
>>>
>>
>>
>
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