[FFmpeg-user] overlay audio channels

[Kosta Vlotis]

On Fri, Aug 3, 2012 at 3:29 PM, Nicolas George
<nicolas.george at normalesup.org> wrote:
> Le septidi 17 thermidor, an CCXX, Kosta Vlotis a écrit :
>> i'm not sure i understand the docs.. this is what i have so far:
>>
>> ffmpeg -async 1 -i b.mpeg -f mp4 -c:v libx264 -preset slow -g 60 -b:v
>> 1000k -s 854x480 -aspect 16:9 -vf "pan=stereo: c0=c0+c1 : c1=c0+c1"
>> -c:a libvo_aacenc -b:a 128k -ar 48000 -ac 1 -threads 0 -y
>> audiotes1_pan.mp4
>
> pan is not a *v*ideo *f*ilter.
>
> And you should be dividing by 2 to avoid overflows: c0=0.5*c0+0.5*c1 or
> c0<c0+c1.
>
>> this isnt working
>
> Define this.
>
> Regards,
>
> --
>   Nicolas George
>
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this command:
W:\Brazstore-1\KOSTA NEW W\SOURCE\ENCODING TESTS>ffmpeg -async 1 -i
video.mpeg -f mp4 -c:v libx264 -preset slow -g 60 -b:v 1000k -s
854x480 -aspect 16:9 -vf pan="stereo: c0<c1+c0 : c1<c0+c1" -c:a
libvo_aacenc -b:a 128k -ar 48000 -threads 0 -y audiotes1_pan.mp4

returns this error:
[scale @ 040c0e80] Media type mismatch between the '(null)' filter output pad 0
and the 'Parsed_pan_0' filter input pad 0
Cannot create the link scale:0 -> pan:0
Error opening filters!