[gst-devel] timestamp buffers in queues

[Edward Hervey]

Hi,

  Timestamps are a property of buffers, which are not related to the
current time.
  'queue' does not modify that property, it just provides a way to
asynchronously queue buffers from one thread to another.
  If your queue is empty, and the downstream thread is waiting for data,
the transfer will be extremely fast (just a matter of signalling a
conditional as soon as that buffer is in the queue so the other thread
can take it to process it downstream).

  Maybe if you give a higher-level explanation of your problem we might
be able to inform you better.

    Edward

On Tue, 2007-11-13 at 17:22 +0100, Florent Ranchin wrote:
> Hi,
>  
> I would like to know how gstreamer queues keep buffer timestamps. Is
> it correct to shift the timestamp of
> Nbuffer/fps (Nbuffer is the size of the queue and fps the sampling
> rate) to have the true timestamp? one told me the timestamps are
> decorrelated of the entry time in the queue...
>  
> I am asking this for synchronisation purposes.
>  
> Thanks for any help,
> Florent Ranchin
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