Hi Jeremy:
Thanks for your advice. When i set correct SPS/PPS,then i can streaming
H264 file now.
Thanks
Best Regards
--- 09/9/11 (五)，Jeremy Noring <kid...@gmail.com> 寫道：
寄件者: Jeremy Noring <kid...@gmail.com>
主旨: Re: [Live-devel] H264 multicast streaming question
收件者: "LIVE555 Streaming Media - development & use" <live-de...@ns.live555.com>
日期: 2009年9月11日,五,上午7:14
2009/9/10 <spopo...@yahoo.com.tw>
But when I streamed the H.264 file by unicsat method successfully , the
sprop-parameter-sets has been set “h264”. Therefore i think the
sprop-parameter-sets=h264 does't influence the stream when using multicast
method. Is it right?
No, that's not right. For the decoder to understand your H.264 stream, it is
crucial that the SPS/PPS info is communicated over a reliable protocol. If you
are not sending in in the sprop-parameter-sets argument, how are you conveying
it? Note that sending it in the actual stream is not recommended (see section
8.4 of RFC3984). Some people mistakenly think their Live555/H264
implementation "works," but really they're just conveying SPS/PPS info through
the lossy RTP channel, which is strongly discouraged by the RFC:
The picture and sequence parameter set NALUs SHOULD NOT be
transmitted in the RTP payload unless reliable transport is provided
for RTP, as a loss of a parameter set of either type will likely
prevent decoding of a considerable portion of the corresponding RTP
stream. Thus, the transmission of parameter sets using a reliable
session control protocol (i.e., usage of principle A or B above) is
RECOMMENDED.
Botton line: correctly populate sprop-parameter-sets; you are wasting your time
by not doing this.
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