[FFmpeg-user] side by side videos

[Lorenzo Perone]

>
> Lorenzo Perone [2013-03-25 17:30:59 +0100] wrote:
>
> > Hi Teemu,
> > I've tried your suggestion and I've used this string:
> >
> > ffmpeg.exe -i realtime_test1.mp4 -filter_complex "[in] scale=642:1050,
> >> pad=1284:1050 [left]; movie=realtime_test2.mp4, scale=642:1050;
> >> [left][right] overlay=642:0 [out]" Output.mp4
>
>
> >> [mov,mp4,m4a,3gp,3g2,mj2 @ 00000000023cd5c0] Invalid stream specifier:
> in.
> >>     Last message repeated 1 times
> >> Stream specifier 'in' in filtergraph description [in] scale=642:1050,
> >> pad=1284:1
> >> 050 [left]; movie=realtime_test2.mp4, scale=642:1050; [left][right]
> >> overlay=642:
> >> 0 [out] matches no streams.
>
> Please read the error messages yourself and try to understand them.

Hi Teemu,
I've tried but I've not found any specific documentation about this syntax,
may you suggest me one?


> The
> input specifier "[in]" is invalid. FFmpeg does not know it. Use input
> specifier like "[0:v:0]" to refer to the first video stream of the first
> input file.
>
I'm sorry but I've not understood exactly how to decode it, may you write
me an example a little more verbose :)


>
> When the filter graph outputs the stream named "[out]" you can later
> refer to that with "-map [out]".

so I can write at the first only the [in] part, OK


>
> (Note that I have not dug any deeper into your task of having side by
> side videos. I'm just helping about this specific error.)
>
OK, I'm trying to be a little more skilled about ffmpeg, I'm not searching
an "out of the box" solution.
Thanks.
l.

>
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