[FFmpeg-user] Quicktime Files create with -vtag aivx

[Rens Dijkshoorn]

> Rens Dijkshoorn <rens <at> onlinemedia.nl> writes: 
> 
> > If you change vtag to use -vtag ai12. Then the file will 
> > playback in Quicktime Player 7 but not in Quicktime Player 
> > X. Then if you search the resulting movie file for the 
> > vtag and hexedit to 'ai12 to aivx' the file will play in 
> > both version of Quicktime Player. 
> 
> Could you test the following inlined patch? 
> 
> diff --git a/libavformat/movenc.c b/libavformat/movenc.c 
> index 6e51424..842b4bf 100644 
> --- a/libavformat/movenc.c 
> +++ b/libavformat/movenc.c 
> @@ -1278,6 +1278,8 @@ 
> else if (rate == 50) tag = MKTAG('a','i','1','5'); 
> else if (rate == 60) tag = MKTAG('a','i','1','6'); 
> } 
> + } else if (track->enc->width == 4096 && track->enc->height == 2160) { 
> + tag = MKTAG('a','i','v','x'); 
> } 
> } 
> 

With this patch no matter what you use as -vtag ai12 or no vtag option.
The vtag is always set to aivx (checked with Dumpster). But the resulting
file won't play in any Quicktime Player or FCPX