[FFmpeg-user] Zoompan filter, frame counts seem to start from 2 and 1, not 0 -- expected behaviour?

[Gyan Doshi]

On 02-06-2018 01:33 PM, Jim DeLaHunt wrote:

> 1234001.000000
>      Last message repeated 1 times
> 2718003.000000
> 3142002.000000
> 1234002.000000
>      Last message repeated 1 times

This isn't related to the zoompan filter. If you ask ffmpeg to not 
compress the log messages by setting the repeat flag `-v +repeat`, 
you'll see that the crop filter processes the first frame twice.

I suspect that this is related to the commit,

ffmpeg: init filtergraphs only after we have a frame on each input

viewed at 
http://git.videolan.org/?p=ffmpeg.git;a=commit;h=af1761f7b5b1b72197dc40934953b775c2d951cc

I'll try to bisect later and test. Feel free to raise a ticket.

Regards,
Gyan