How to change framerate in REALTIME when video is PLAYING?
andreynech at googlemail.com
Sun Jul 10 02:21:54 PDT 2011
> Could you please give me another example about adjusting the caps filter?
Last couple of months I was working on the project rather active and
re-organize the source tree quite a bit.
Please try the following link:
> Thank you very much!
> On Thu, Mar 10, 2011 at 2:58 AM, Andrey Nechypurenko
> <andreynech at googlemail.com> wrote:
>> Hi Tom,
>> > I use
>> > gst-launch filesrc "location=video/1.MPG" ! decodebin ! videorate !
>> > video/x-raw-yuv, width=640,height=480,framerate=25/1 ! ffmpegcolorspace
>> > !
>> > jpegenc ! multipartmux ! tcpserversink host=192.168.2.1 port=$portNumber
>> > to stream a video and can change the video frame rate in this way.
>> > But in this way the frame rate is fixed (i.e., framerate=25/1 here).
>> > I want to change the framerate in REALTIME when video is PLAYING ---
>> > during the streaming of this video, I can change the framerate anytime I
>> > want.
>> Then you need to modify the pipeline from your application. In
>> particular, you need to adjust the caps filter. Here you can find an
>> example how to do it:
>> It changes width and height property of the named (qos-caps) caps
>> filter by pausing the videoscale element in front of it, updating
>> width and height properties and then un-pausing the videoscale. So in
>> your case you can update the framerate property. However, as Kapil
>> pointed out to work properly, the downstream elements should be able
>> to re-negotiate the new format.
>> gstreamer-devel mailing list
>> gstreamer-devel at lists.freedesktop.org
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> gstreamer-devel at lists.freedesktop.org
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