[gst-devel] Help setting frame rate with videorate

[Noe Nieto]

Hi All

I am experiencing the same problem in a similar situation. On this case the
MJPEG source is at 25 fps. Here is the example:

gnomevfssrc location=$CAMERA ! typefind ! multipartdemux ! image/jpeg,
framerate=25/1 ! jpegdec ! ffmpegcolorspace ! theoraenc ! oggmux ! filesink
= location=test0.ogg

The first problem here is that past the jpegdec element, the framerate is
ignored and falls back to 0/1.
The second problem is that If I try to force the framerate, say, right
before ffmpegcolorspace, then the pipeline will not construct.
The third problem occurs if I use the videorate element. The video
accumulates frames, but totem only displays a still picture instead of a
video.

Can anyone advice?

Regards.

Noe Nieto.


2007/12/19 Aaron Lindsey <aaron at 8bh.com>

> With the help from Edward and quite a bit of searching on my own I was
> able to solve my problem.  The frame rates seemed to be ignored and 1/1
> was always assumed until I used the multipartdemux element.  Here is the
> pipeline that finally worked:
>
>  gnomevfssrc location=http://url?resolution=320x240\&fps=2<http://url?resolution=320x240%5C&fps=2>!
> multipartdemux ! image/jpeg,framerate=2/1 ! jpegdec ! theoraenc ! oggmux
> ! filesink location=test.ogg
>
> After looking at the docs for multipartdemux, I'm not sure why I got any
> video at all before.  I guess jpegdec was figuring out some way to parse
> the multipart stream into jpegs with the side effect that the frame rate
> from the caps filter was ignored....or something.  Haven't dug deep enough
> into gstreamer to really know.  Can anyone shed some light?
>
> Aaron
>
> > Hi,
> >
> >   Add a capsfilter informing the content is jpeg data at Xfps.
> >
> >   Ex : gnomevfssrc ! image/jpeg,framerate=2/1 ! jpegdec ....
> >
> >     Edward
> >
>
>
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