[FFmpeg-devel] [PATCH] provide an input parameter to specify 3d stereo format for mkv/webm 3d videos

[Kirill Gavrilov]

Hi,

I prepare new patch based on Alok. It read and write stereo mode flag using
metadata tags.
Also it reads combined planes virtual streams and mark them like:
stereo_mode -> left_3
stereo_mode -> right_3

2011/4/26 Reimar Döffinger <Reimar.Doeffinger at gmx.de>

> I think it would be more user-friendly to allow an actual string instead
> of just numbers, also specifying a value that is not supported should at
> least print a warning or even fail.
>
In patch integers were replaced with strings. But the problem is
that names for stereoscopic formats are not standardized
and this is unclear how user should select them (but sure - magic integers
not better)...

if ((tag = av_metadata_get(st->metadata, "stereo_mode", NULL, 0)) ||
>    (tag = av_metadata_get( s->metadata, "stereo_mode", NULL, 0)))
> ...
> Will prefer stream metadata but can also use global metadata.
> Of course the proper solution is to implement a way to specify
> per-stream metadata on the command-line.
>
This is ugly but while no way to setup metadata per stream from console -
may be useful.
I'll try to implement per stream metadata setup for ffmpeg but its options
logic is much complicated
and I fear to write something stupid...
-----------------------------------------------
Kirill Gavrilov,
Software designer.
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