[Libav-user] Is ffmpeg possibe to decode H.263 Mode B?

[김희숙]

Thank you for your reply.

It's very helpful to me.

 

Regards,

HSK

-----Original Message-----
From: "Arash Cordi"<arash.cordi at gmail.com> 
To: "This list is about using libavcodec, libavformat, libavutil, libavdevice and libavfilter."<libav-user at ffmpeg.org>; 
Cc: 
Sent: 2012-09-07 (금) 16:06:33
Subject: Re: [Libav-user] Is ffmpeg possibe to decode H.263 Mode B?

normally h263 fragments are as follow:

start of frame --> [Mode A][Mode B] .... [Mode B] <---- end of frame

you only need the first byte of h263 payload header which is the same for all Mode A,B,C;


+-+-+-+-+-+-+-+-+
|F|P|SBIT |EBIT |
+-+-+-+-+-+-+-+-+
you need timestamp and marker bit (to identify start and end of frame) from rtp payload.

you also need to align fragments according to SBIT, EBIT in h263 payload header

-- 
ArasH
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