[Libav-user] reading video with multiple video streams

[Svetlana Olonetsky]

Sorry, I do not understand.

How can I see that

Stream #0:0: Video: mjpeg, yuvj420p, 640x480, 90k tbr, 90k tbn, 90k tbc is
BAD

and

Stream #0:2(eng): Video: wmv3 (Main) (WMV3 / 0x33564D57), yuv420p, 640x480,
5500 kb/s, 29.97 tbr, 1k tbn, 1k tbc is GOOD ?

Thank you,
Svetlana

On Sun, Oct 21, 2012 at 4:03 PM, Andrey Utkin <
andrey.krieger.utkin at gmail.com> wrote:

> 2012/10/21 Svetlana Olonetsky <svetlana.olonetsky at gmail.com>:
> > Hi,
> >
> > I am reading video files using ffmpeg in C++.
> > I have some videos from users with multiple video streams.
> >
> > For example, running ffmpeg directly gives stream info:
> > Stream #0:0: Video: mjpeg, yuvj420p, 640x480, 90k tbr, 90k tbn, 90k tbc
> >     Metadata:
> >       comment         : Movie/video screen capture
> >     Stream #0:1(eng): Audio: wmav2 (a[1][0][0] / 0x0161), 48000 Hz,
> stereo,
> > s16, 192 kb/s
> >     Stream #0:2(eng): Video: wmv3 (Main) (WMV3 / 0x33564D57), yuv420p,
> > 640x480, 5500 kb/s, 29.97 tbr, 1k tbn, 1k tbc
> >
> > How can I figure out which video stream is Main ?
>
> You are contradicting yourself. You show example with one audio and
> one video stream.
> For analyzing elementary streams, look at AVFormatContext.streams
> array of AVStream structs; AVStream also has entry 'codec' of
> AVCodecContext type, where you can find all properties of certain
> elementary stream.
>
> --
> Andrey Utkin
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> Libav-user at ffmpeg.org
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>
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