[FFmpeg-user] adjust DAR while using -c:v copy

[Dave Rice]

On Dec 17, 2012, at 6:46 PM, Carl Eugen Hoyos wrote:
> Dave Rice <dave <at> dericed.com> writes:
> 
>> I'd have a QuickTime file that is 720x480 with a 3/2 DAR 
>> and 1/1 SAR. I would like to convert this to a 4/3 DAR
>> QuickTime without transcoding. I've tried using -aspect 
>> 4/3 before and after the input and also tried using 
>> -vf setdar options but all of these seem to be ignored 
>> when I am using the -c:v copy command.
> 
> To the best of my knowledge, this is intended behaviour, 
> video filters do not work with -vcodec copy.
> 
> (I am not claiming what you ask for could not be useful, 
> I am just trying to confirm the situation.)

I added an enhancement request: https://ffmpeg.org/trac/ffmpeg/ticket/2046
It looks like similar support was added to allow the fps to be adjusted without transcoding, see: http://comments.gmane.org/gmane.comp.video.ffmpeg.user/38838.

Dave Rice