[FFmpeg-devel] RTP mark bit not passed to parse_packet

Ronald S. Bultje rsbultje
Thu Jan 15 14:16:44 CET 2009


On Thu, Jan 15, 2009 at 4:13 AM, Alexandre FERRIEUX -
FT/RD/SIRP/ASF/SOFTL <alexandre.ferrieux at orange-ftgroup.com> wrote:
> In the process of writing an RTP depayloader for H263 (RFC2429, simple
> follow-on packet mode), I see that the current API doesn't pass the RTP
> Mark bit (buf[1]&0x80) to the payload handler callback.

I have a local patch that saves the M-bit as 0x100 in the flags field
(flags |= (buf[1] & 80) << 1) in the flags field, which is passed on
to the parse_packet() functions. See my recent X-QT patch, which
includes it (IIRC). We could consider making >=0x100 (e.g. 0xFF00) an
official "format-specific" flag mask (in avformat.h), and then using
0x100 as RTP_FLAG_M_BIT (in rtp_internal.h).


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