Re: [PATCH 0/1] MR4943: mfreadwrite: Replace presentation clock with clock state sink for writer.

[Ziqing Hui (＠zhui)]

On Wed Jan 31 02:23:16 2024 +0000, Ziqing Hui wrote:
> I created a writer from mp4 media sink. Before calling BeginWriting() on
> writer, GetPresentationClock() on that sink returned MF_E_NO_CLOCK.
> After BeginWriting(), it returns a valid clock.
> The test code is attacted: [clock_test.c](/uploads/27be06ce75c1c05e51fe04a6bde08b13/clock_test.c).

Oh, I got a question not relating to this MR:  Where did the sink class factory guids in mfinternal.idl come from? Did we generate it by ourself?