[FFmpeg-user] QuickTime Movie Header Atom Poster Time

[Gyan Doshi]

On 2021-04-20 21:52, Bryce Newman wrote:
> Hi,
>
> Using the latest ffprobe version 4.4 I am trying to print the poster time from the mvhd. Here is the data structure https://developer.apple.com/library/archive/documentation/QuickTime/QTFF/QTFFChap2/qtff2.html#//apple_ref/doc/uid/TP40000939-CH204-32947.
>
> As I see from the code in https://github.com/FFmpeg/FFmpeg/blob/f40e9b13554d88cbdd6cd2b4a3da2cbea9590f5d/libavformat/mov.c#L1524 poster time is there, but I am not sure of the ffprobe args that will log poster time, current time etc to stdout.
>
> I should note that exiftool does log to stdout the poster time.
> i.e.
>
> exiftool POSTERFRAME_YES_995968260_h1.mov | grep Poster
> Poster Time                     : 7.32 s
>
> How can I have ffprobe also print out the poster time or all the values in the mvhd?

Nothing is done with that data - it's not exported.

I'll send a patch to write many of those fields out as metadata, but I 
expect that to take some time as many regression unit tests will have to 
be changed.

Regards,
Gyan