[Bug 764733] qtdemux: Regression in YouTube TV tests in WebKit MSE after fix for #760779

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=764733

--- Comment #9 from Xabier Rodríguez Calvar <calvaris at igalia.com> ---
(In reply to Seungha Yang from comment #6)
> Could you kindly explain more please?
> 
> What I'm understanding about this issue is as follows
> - bug #760779 caused delay in expose stream, if moov have no sample
> information.
> - MSS mode case, however, exposing stream causes no problem because upstream
> element provides caps information (as far as I understand)...
> ==> bug #760779 did not fully consider MSS case so, delay also happened for
> MSS mode.

> - Attached patch expects exposing streams with the first moov although the
> moov has no sample information.

Phil is right, your patch does not fix the issue. I uploaded a couple of logs,
the right one is run after reverting your patch and the wrong one is run before
reverting your patch.

I hope this can provide some useful information to you.

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