What's the correct way to play sources from different offsets/times?

[Olivier Crête]

Hi,

To add a time difference, you just need to set the "offset" property on
the first pad where there is a timestamp, so after the demuxer. You
don't even need to have a timer, the sink will wait until the right
time is reached.

Olivier

On Tue, 2021-02-02 at 13:20 -0600, Trey Hutcheson wrote:
> I have two video files that were created by a single pipeline; they
> were started approximately 5 seconds apart. Each video has a time
> overlay.
> 
> I would like to play these two videos back in the same pipeline (for
> now, each to a different video sink/window), but respect their
> different start times.
> 
> I've built a pipeline that watches the clock, and when the clock
> advances past a certain threshold (roughly 5 seconds), it wires in
> the second video and starts playing it from a filesrc. However, when
> the second video starts, the video itself starts 5 seconds *into* the
> video, if that makes sense. The time overlay displayed in the video
> is roughly 5 seconds later than if I play the file in an independent
> viewer.
> 
> So what's the proper way to control the relative position of this
> second video stream? Seek on the filesrc? Seek on the demuxer. Set a
> negative start time or offset on an element somewhere?
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-- 
Olivier Crête
olivier.crete at collabora.com

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