[FFmpeg-user] [EXTERNAL] Re: QuickTime Movie Header Atom Poster Time
Bryce Newman
bryce.newman at gettyimages.com
Tue Apr 20 20:09:07 EEST 2021
Hi Gyan,
Thank you!
Can this patch be included in future stable versions of ffprobe?
On 4/20/21, 10:57 AM, "ffmpeg-user on behalf of Gyan Doshi" <ffmpeg-user-bounces at ffmpeg.org on behalf of ffmpeg at gyani.pro> wrote:
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
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