[FFmpeg-user] aspect ratio is changed with codec copy and sameq

[Carl Eugen Hoyos]

Rodney Baker <rodney.baker <at> iinet.net.au> writes:

> >one weird thing is when i see details in another video tool, it shows me
> >sar=4:3
> >dar=4:3
> >of original video
> 
> >but when i use command ffpeg -i sourcefile, it shows me
> >sar=300:400
> >dar=1:1
> 
> In other words, ffmpeg appears to be detecting the SAR and DAR 
> differently to "another video tool"

My answer was:
"If the input file is decoded incorrectly, please provide a sample."
I assumed the original report was about FFmpeg destroying some 
information when remuxing the stream. That some information is 
possibly read incorrectly sounds different to me.

Thank you for your help, Carl Eugen