overlay audio channels

[Kosta Vlotis-2]

i have a question i know is a bit strange.

i was wondering if it's possible to overlay 2 audio channels in the
same video with ffmpeg.

Example: videoX has left audio channel: X and right audio channel: Y

i would like to make it so that it looks like: left audio channel=xy
and right audio channel=xy

i know that setting "-ac 1" pretty much accomplishes this BUT the
metadata obviously shows mono. i'd like to accomplish the same but
with stereo instead of mono.

any ideas?
_______________________________________________
ffmpeg-user mailing list
[hidden email]
http://ffmpeg.org/mailman/listinfo/ffmpeg-user

[Nicolas George-2]

Le septidi 17 thermidor, an CCXX, Kosta Vlotis a écrit :
> i have a question i know is a bit strange.
>
> i was wondering if it's possible to overlay 2 audio channels in the
> same video with ffmpeg.
>
> Example: videoX has left audio channel: X and right audio channel: Y
>
> i would like to make it so that it looks like: left audio channel=xy
> and right audio channel=xy

You can do exactly that with the pan audio filter. There are examples in the
doc.

Regards,

--
  Nicolas George

_______________________________________________
ffmpeg-user mailing list
[hidden email]
http://ffmpeg.org/mailman/listinfo/ffmpeg-user

[Kosta Vlotis-2]

On Fri, Aug 3, 2012 at 12:53 PM, Nicolas George
<[hidden email]> wrote:

> Le septidi 17 thermidor, an CCXX, Kosta Vlotis a écrit :
>> i have a question i know is a bit strange.
>>
>> i was wondering if it's possible to overlay 2 audio channels in the
>> same video with ffmpeg.
>>
>> Example: videoX has left audio channel: X and right audio channel: Y
>>
>> i would like to make it so that it looks like: left audio channel=xy
>> and right audio channel=xy
>
> You can do exactly that with the pan audio filter. There are examples in the
> doc.
>
> Regards,
>
> --
>   Nicolas George
>
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.4.12 (GNU/Linux)
>
> iEYEARECAAYFAlAcAewACgkQsGPZlzblTJMizQCfcQ/w/ebjI6lZBmNCFwQlGiZT
> ihIAn3ivxf5nQ4y9GUBCBCRsC865eyLE
> =Fj+Z
> -----END PGP SIGNATURE-----
>
> _______________________________________________
> ffmpeg-user mailing list
> [hidden email]
> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>

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

this isnt working
_______________________________________________
ffmpeg-user mailing list
[hidden email]
http://ffmpeg.org/mailman/listinfo/ffmpeg-user

[Nicolas George-2]

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

_______________________________________________
ffmpeg-user mailing list
[hidden email]
http://ffmpeg.org/mailman/listinfo/ffmpeg-user

[Kosta Vlotis-2]

On Fri, Aug 3, 2012 at 3:29 PM, Nicolas George
<[hidden email]> 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
>
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.4.12 (GNU/Linux)
>
> iEYEARECAAYFAlAcJo4ACgkQsGPZlzblTJPJpACZAZZpYtK+vP/Tu+tSXrbEJFAB
> 7GIAn0cyhc2DO1jpUCNe8kma20H9mkSn
> =gMSg
> -----END PGP SIGNATURE-----
>
> _______________________________________________
> ffmpeg-user mailing list
> [hidden email]
> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>

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!
_______________________________________________
ffmpeg-user mailing list
[hidden email]
http://ffmpeg.org/mailman/listinfo/ffmpeg-user

[Clément Bœsch]

On Fri, Aug 03, 2012 at 03:37:37PM -0400, Kosta Vlotis wrote:

> On Fri, Aug 3, 2012 at 3:29 PM, Nicolas George
> <[hidden email]> 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
> >
> > -----BEGIN PGP SIGNATURE-----
> > Version: GnuPG v1.4.12 (GNU/Linux)
> >
> > iEYEARECAAYFAlAcJo4ACgkQsGPZlzblTJPJpACZAZZpYtK+vP/Tu+tSXrbEJFAB
> > 7GIAn0cyhc2DO1jpUCNe8kma20H9mkSn
> > =gMSg
> > -----END PGP SIGNATURE-----
> >
> > _______________________________________________
> > ffmpeg-user mailing list
> > [hidden email]
> > http://ffmpeg.org/mailman/listinfo/ffmpeg-user
> >
>
> 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!

"Media type mismatch". -vf stands for video filter as Nicolas said. You
should try to guess the equivalent for audio filter.

Also, please consider pasting the full FFmpeg output if that still doesn't
work.

--
Clément B.

_______________________________________________
ffmpeg-user mailing list
[hidden email]
http://ffmpeg.org/mailman/listinfo/ffmpeg-user

[Kosta Vlotis-2]

On Fri, Aug 3, 2012 at 3:40 PM, Clément Bœsch <[hidden email]> wrote:

> On Fri, Aug 03, 2012 at 03:37:37PM -0400, Kosta Vlotis wrote:
>> On Fri, Aug 3, 2012 at 3:29 PM, Nicolas George
>> <[hidden email]> 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
>> >
>> > -----BEGIN PGP SIGNATURE-----
>> > Version: GnuPG v1.4.12 (GNU/Linux)
>> >
>> > iEYEARECAAYFAlAcJo4ACgkQsGPZlzblTJPJpACZAZZpYtK+vP/Tu+tSXrbEJFAB
>> > 7GIAn0cyhc2DO1jpUCNe8kma20H9mkSn
>> > =gMSg
>> > -----END PGP SIGNATURE-----
>> >
>> > _______________________________________________
>> > ffmpeg-user mailing list
>> > [hidden email]
>> > http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>> >
>>
>> 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!
>
> "Media type mismatch". -vf stands for video filter as Nicolas said. You
> should try to guess the equivalent for audio filter.
>
> Also, please consider pasting the full FFmpeg output if that still doesn't
> work.
>
> --
> Clément B.
>
> _______________________________________________
> ffmpeg-user mailing list
> [hidden email]
> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>

any idea what the equicalent for audio is? i tried -af and i get this:
Unrecognized option 'af'
Failed to set value 'pan=stereo: c0<c1+c0 : c1<c0+c1' for option 'af'
_______________________________________________
ffmpeg-user mailing list
[hidden email]
http://ffmpeg.org/mailman/listinfo/ffmpeg-user

[Clément Bœsch]

On Fri, Aug 03, 2012 at 03:44:23PM -0400, Kosta Vlotis wrote:

> On Fri, Aug 3, 2012 at 3:40 PM, Clément Bœsch <[hidden email]> wrote:
> > On Fri, Aug 03, 2012 at 03:37:37PM -0400, Kosta Vlotis wrote:
> >> On Fri, Aug 3, 2012 at 3:29 PM, Nicolas George
> >> <[hidden email]> 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
> >> >
> >> > -----BEGIN PGP SIGNATURE-----
> >> > Version: GnuPG v1.4.12 (GNU/Linux)
> >> >
> >> > iEYEARECAAYFAlAcJo4ACgkQsGPZlzblTJPJpACZAZZpYtK+vP/Tu+tSXrbEJFAB
> >> > 7GIAn0cyhc2DO1jpUCNe8kma20H9mkSn
> >> > =gMSg
> >> > -----END PGP SIGNATURE-----
> >> >
> >> > _______________________________________________
> >> > ffmpeg-user mailing list
> >> > [hidden email]
> >> > http://ffmpeg.org/mailman/listinfo/ffmpeg-user
> >> >
> >>
> >> 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!
> >
> > "Media type mismatch". -vf stands for video filter as Nicolas said. You
> > should try to guess the equivalent for audio filter.
> >
> > Also, please consider pasting the full FFmpeg output if that still doesn't
> > work.
> >
> > --
> > Clément B.
> >
> > _______________________________________________
> > ffmpeg-user mailing list
> > [hidden email]
> > http://ffmpeg.org/mailman/listinfo/ffmpeg-user
> >
>
> any idea what the equicalent for audio is? i tried -af and i get this:
> Unrecognized option 'af'
> Failed to set value 'pan=stereo: c0<c1+c0 : c1<c0+c1' for option 'af'

You guessed well the option name. But it looks like you don't have a
FFmpeg recent enough. Unfortunately without the full output no one can
tell.

--
Clément B.

_______________________________________________
ffmpeg-user mailing list
[hidden email]
http://ffmpeg.org/mailman/listinfo/ffmpeg-user

[Kosta Vlotis-2]

On Fri, Aug 3, 2012 at 3:47 PM, Clément Bœsch <[hidden email]> wrote:

> On Fri, Aug 03, 2012 at 03:44:23PM -0400, Kosta Vlotis wrote:
>> On Fri, Aug 3, 2012 at 3:40 PM, Clément Bœsch <[hidden email]> wrote:
>> > On Fri, Aug 03, 2012 at 03:37:37PM -0400, Kosta Vlotis wrote:
>> >> On Fri, Aug 3, 2012 at 3:29 PM, Nicolas George
>> >> <[hidden email]> 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
>> >> >
>> >> > -----BEGIN PGP SIGNATURE-----
>> >> > Version: GnuPG v1.4.12 (GNU/Linux)
>> >> >
>> >> > iEYEARECAAYFAlAcJo4ACgkQsGPZlzblTJPJpACZAZZpYtK+vP/Tu+tSXrbEJFAB
>> >> > 7GIAn0cyhc2DO1jpUCNe8kma20H9mkSn
>> >> > =gMSg
>> >> > -----END PGP SIGNATURE-----
>> >> >
>> >> > _______________________________________________
>> >> > ffmpeg-user mailing list
>> >> > [hidden email]
>> >> > http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>> >> >
>> >>
>> >> 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!
>> >
>> > "Media type mismatch". -vf stands for video filter as Nicolas said. You
>> > should try to guess the equivalent for audio filter.
>> >
>> > Also, please consider pasting the full FFmpeg output if that still doesn't
>> > work.
>> >
>> > --
>> > Clément B.
>> >
>> > _______________________________________________
>> > ffmpeg-user mailing list
>> > [hidden email]
>> > http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>> >
>>
>> any idea what the equicalent for audio is? i tried -af and i get this:
>> Unrecognized option 'af'
>> Failed to set value 'pan=stereo: c0<c1+c0 : c1<c0+c1' for option 'af'
>
> You guessed well the option name. But it looks like you don't have a
> FFmpeg recent enough. Unfortunately without the full output no one can
> tell.
>
> --
> Clément B.
>
> _______________________________________________
> ffmpeg-user mailing list
> [hidden email]
> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>

oh sorry about that. here is the full output: thanks for the help!

fmpeg -async 1 -i video.mpeg -f mp4 -c:v libx264 -preset slow -g 60
-b:v 1000k -s 854x480 -asp
ect 16:9 -af pan="stereo: c0<c1+c0 : c1<c0+c1" -c:a libvo_aacenc -b:a 128k -ar 4
8000 -threads 0 -y audiotes1_pan.mp4
ffmpeg version N-40126-ga4b58fd Copyright (c) 2000-2012 the FFmpeg developers
  built on Apr 26 2012 03:29:50 with gcc 4.6.3
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-ru
ntime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libass
 --enable-libcelt --enable-libopencore-amrnb --enable-libopencore-amrwb --enable
-libfreetype --enable-libgsm --enable-libmp3lame --enable-libnut --enable-libope
njpeg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libth
eora --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-
libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --e
nable-zlib
  libavutil      51. 47.100 / 51. 47.100
  libavcodec     54. 15.100 / 54. 15.100
  libavformat    54.  3.100 / 54.  3.100
  libavdevice    53.  4.100 / 53.  4.100
  libavfilter     2. 72.100 /  2. 72.100
  libswscale      2.  1.100 /  2.  1.100
  libswresample   0. 11.100 /  0. 11.100
  libpostproc    52.  0.100 / 52.  0.100
Input #0, mpeg, video.mpeg':
  Duration: 00:00:55.22, start: 0.426711, bitrate: 31716 kb/s
    Stream #0:0[0x1e0]: Video: mpeg2video (High), yuv420p, 1920x1080 [SAR 1:1 DA
R 16:9], 31073 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
    Stream #0:1[0x1c0]: Audio: mp2, 48000 Hz, stereo, s16, 384 kb/s
Unrecognized option 'af'
Failed to set value 'pan=stereo: c0<c1+c0 : c1<c0+c1' for option 'af'
_______________________________________________
ffmpeg-user mailing list
[hidden email]
http://ffmpeg.org/mailman/listinfo/ffmpeg-user

[Carl Eugen Hoyos]

Kosta Vlotis <kosta.brazzers <at> gmail.com> writes:

> ffmpeg version N-40126-ga4b58fd

This is over three months (and several thousand revisions) old,
please update to current git head.

Carl Eugen

_______________________________________________
ffmpeg-user mailing list
[hidden email]
http://ffmpeg.org/mailman/listinfo/ffmpeg-user

[Kosta Vlotis-2]

On Fri, Aug 3, 2012 at 4:05 PM, Carl Eugen Hoyos <[hidden email]> wrote:

> Kosta Vlotis <kosta.brazzers <at> gmail.com> writes:
>
>> ffmpeg version N-40126-ga4b58fd
>
> This is over three months (and several thousand revisions) old,
> please update to current git head.
>
> Carl Eugen
>
> _______________________________________________
> ffmpeg-user mailing list
> [hidden email]
> http://ffmpeg.org/mailman/listinfo/ffmpeg-user

thanks, ill get a later version and report back.
_______________________________________________
ffmpeg-user mailing list
[hidden email]
http://ffmpeg.org/mailman/listinfo/ffmpeg-user

[Kosta Vlotis-2]

On Fri, Aug 3, 2012 at 4:13 PM, Kosta Vlotis <[hidden email]> wrote:

> On Fri, Aug 3, 2012 at 4:05 PM, Carl Eugen Hoyos <[hidden email]> wrote:
>> Kosta Vlotis <kosta.brazzers <at> gmail.com> writes:
>>
>>> ffmpeg version N-40126-ga4b58fd
>>
>> This is over three months (and several thousand revisions) old,
>> please update to current git head.
>>
>> Carl Eugen
>>
>> _______________________________________________
>> ffmpeg-user mailing list
>> [hidden email]
>> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>
> thanks, ill get a later version and report back.

Just tried it. it worked great! thanks for all the help!
_______________________________________________
ffmpeg-user mailing list
[hidden email]
http://ffmpeg.org/mailman/listinfo/ffmpeg-user