Am 29.05.2012 14:00, schrieb Christian Brümmer:
Am 28.05.2012 19:21, schrieb Christian Brümmer:
Hi,
i encode video frames using a default codec configuration via
avcodec_get_context_defaults3(). That video frames are further used
for rtsp streaming based on live555. For compatibility i need the SPS
and PPS-informations for the rtsp server but i didnt know them (cause
default configurations i cant access).
How can i get that infos out of a AVCodecContext after setting to
default values (c-code)?
Best regards and thanks for reading,
Christian
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I figured out that those informations typically found in
SDP-descriptions. So i tried av_sdp_create which works so far but it
has no sprop-parameter-sets :/.
Cant be that hard - or?
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"Cant be that hard - or? "
Okay now im pretty sure it is:
I read AVCodecContex.extradata contains the informations i need. For
decoding i used that code ->
http://cgit.lscube.org/cgit.cgi/feng/tree/src/media/parser/h264.c#n218 -
in a slightly modified way (replaced glib functions with e.g. libavs
base64.h). Finally the decoding stuff is running - BUT...
my AVCodecContext.extradata_size == 0 <- what the heck?!? So no data for
decoding and really no idea left how to get those informations.... WHAA!
I make desperate efforts but i cant get into that...
At least i need another hint. Im not asking for complete solution - its
enough to know roughly the right way!
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