Timestamp problem...

[Edward Hervey]

On Mon, 2013-11-25 at 17:16 +0100, Eric Trousset wrote:
> Hi,
> 
>  
> 
> In my effort to write a src element, and to mix the outgoing buffers
> with a video stream(at the moment, I just have 1 stream, I’ll had the
> media later on), I need to timestamp those buffers.
> 
>  
> 
> So I tried two things:
> 
> -          First I tried calling gst_base_src_do_timestamp, but it
> seems to have no effect. My outgoing buffers are still not
> timestamped. I tried to give a clock to the source element using the
> gst_system_clock_obtain, or getting one from the pipeline with no
> chance…

  I think you also need to specify you work in time
(gst_base_src_set_format iirc)

    Edward

> 
> -          Secondly I tried timestamping the outgoing buffer myself.
> Wath I did is in the start, call set_clock with the system clock, and
> call set_base_time with time from the same clock. The in the create
> function I set PTSand DTS to current_time – base_time. This is not far
> from work, but still it seem the video sink drops a lot of frame and
> the display is not updated very often.
> 
>  
> 
> Any advice on how to properly set my time stamps (videomixer seems to
> need those).
> 
> Also, when I query the position to my pipeline, it changes only when
> the video sink drop frames and display a new buffer.
> 
>  
> 
> Regards,
> 
> Eric T.
> 
> 
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-- 
Edward Hervey
bilboed at bilboed.com