Ross Finlayson ha scritto:
I have a program that I use to stream PAL video encoded with H.264.
Everything works fine, but if I try to halve the framerate the player
VLC crashes, while mplayer works (but I think it does some form of
concealment).
I can't help you with VLC; this is not a VLC mailing list.
well, I used VLC because it makes use of live555.
However, you should - as always - make sure that each of your H.264 NAL
units (coming from your "H264VideoStreamFramer" subclass)
1/ Have an accurate "fPresentationTime" (which is aligned with the 'wall
clock' time that you'd get by calling "gettimeofday()", and
2/ Have accurate "fDurationInMicroseconds" values
Since the only thing you've changed is the frame rate, perhaps one or
both of these things didn't get changed correctly?
is it normal that fDurationInMicroseconds is set to 0 each time
deliverFrame is called?
You shouldn't have to know or care about RTP timestamps; these will get
set automatically by the code, provided that the "fPresentationTime"s
are correct. (H.264-over-RTP always uses a 90000 Hz RTP timestamp
frequency.) (Therefore any future questions about RTP timestamps will
be ignored.)
ok, I'll dig into fPresentationTime.
I'm sorry to bother you, but I have a quick question, I'd like you just
to tell me yes or no: when the framerate changes, am I correct to expect
that the delta in terms of timestamps between rtp packets varies?
Because if this is true, it means that I'm making a mistake somewhere
else, right?
Thanks for your help,
Ottavio
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