[FFmpeg-devel] [PATCH]Force the DAR for AVCI50 to 16:9

Carl Eugen Hoyos cehoyos at ag.or.at
Fri Jan 4 16:47:14 CET 2013

Kieran Kunhya <kierank <at> ob-encoder.com> writes:

> > What would be the correct fix?
> Reporting a bug to the creator of such files.

FFmpeg "created" the file by inserting a SPS 
that specifies a SAR of 3:4 instead of 4:3.

> You can't fix an issue like this because 
> you'll break SAR for valid files.

How would changing the SAR that is specified by 
extradata inside FFmpeg break valid files?

> I must admit I don't understand why mediainfo 
> reports a (correct) DAR of 16:9, I don't see any 
> information in the stream to suggest that.
> In reality what I'd do is I'd special case it 
> in my application, which I suspect is what ffmbc 
> does or will have to do if these files are prevalent.

Users have reported several times that ffmbc does 
not support the files either (as FFmpeg until 

Carl Eugen

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