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Hi Ross,<br>
<br>
I just wanted to keep you in touch about my issue, and I'm glad to say
it's now solved.<br>
In fact, ffmpeg libraries already contain some useful parsers, and I
especially use the 'av_parser_parse' method, which simply reads an
input buffer and rebuilds a proper output frame.<br>
Once a frame is complete, you just have to decode it using traditional
methods, and everything rolls on.<br>
<br>
Don't know if you're interested in those news though, but it might be
useful if some liveMedia users want to do the same as me :)<br>
<br>
Best regards,<br>
Guillaume.<br>
<br>
Le 07/09/2010 08:47, Ross Finlayson a écrit :
<blockquote cite="mid:f06240812c8ab8e7d73ff@%5B66.80.62.44%5D"
type="cite">
<blockquote type="cite">This video has (on purpose) no audio track,
so I can focus on video stream only.
<br>
Payload of value 32 is an MPEG1 or MPEG2 video
<br>
</blockquote>
<br>
That's correct.
<br>
<br>
An important thing to note about the RTP payload format for MPEG-1 or
MPEG-2 video (defined in RFC 2250) is that the data units delivered by
RTP are not (necessarily) complete video frames (even though our code
refers to them as 'frames' - which is admittedly a bit confusing). For
MPEG-1 or 2 video, the data units delivered by RTP - i.e., delivered
one-at-a-time by a "MPEG1or2VideoRTPSource" object - can be MPEG
headers, or one or more video 'slices', but need not be a complete
video frame. (See RFC 2250 section 3.1 and Appendix 1.) This allows a
decoder to handle data loss without necessarily discarding an entire
video frame, but also means that it has to be a little smarter about
properly detecting when it has received enough data to make up an
entire frame.
<br>
</blockquote>
<br>
<br>
<div class="moz-signature">-- <br>
Guillaume FERRY<br>
Bertin Technologies<br>
Département Bertin Conseil<br>
Activité Traitement de l'Information et du Contenu<br>
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