Alex Cohn <[email protected]> писал(а) в своём письме Wed, 25 Apr
2012 17:54:44 +0400:
On Wed, Apr 25, 2012 at 16:45, Григорий <[email protected]> wrote:
Andrey Utkin <[email protected]> писал(а) в своём письме
Wed,
25 Apr 2012 17:29:09 +0400:
25 апреля 2012 г. 15:52 пользователь Григорий <[email protected]>
написал:
Hi all.
I've built libffmpeg for Android and am trying to decode H.264 stream
using
it. I'm receiving that stream via RTMP connection and passing all
video
packets (excluding first byte that contains flags related to RTMP) to
the
avcodec_decode_video2 function. With H.263 it works perfectly, but
when I
try to use the same code (only with codec ID changed) for H.264, every
call
to avcodec_decode_video2 returns -1 and nothing gets decoded.
Here is the output:
Do you know libavformat can read and demux RTMP stream by itself?
Seems like problem in your demuxer, because decoding the frames it
produces fail.
Yes I know, but I need more than simply receiving and playing, this
will be
a kind of VoIP service. My demuxer seems to work fine - I am able to
successfully decode audio using Speex and video using libavcodec when
it is
encoded into H.263. Only problem is with H.264.
Packing of h264 into a stream is not trivial. You may find some
curious information at
http://livertmpjavapublisher.blogspot.com/2011/06/h264-avcvideopacket.html
Alex
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Thank you for this link. I've made it to parse the decoder configuration
record, extract SPS, PPS and some other things. I've tried to pass PPS and
SPS to avcodec_decode_video2 but it still returns -1, prints "no frame!"
and does not decode anything else. Prepending 0x00000001 before them or
making AVCDCR as described here
http://stackoverflow.com/questions/3493742/problem-to-decode-h264-video-over-rtp-with-ffmpeg-libavcodec
give the same result.
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