[vlc-devel] rtp sequence numbers

Rémi Denis-Courmont remi at remlab.net
Mon Jan 11 17:05:34 CET 2010


Le lundi 11 janvier 2010 17:09:42 Jure Pečar, vous avez écrit :
> We're using a streaming server that vlc feeds via rtp/sdp. This server
>  often complains at the beginning of a session that vlc is sending it
>  invalid rtp packets. Cause of complaint is the base sequence number,
>  reported by vlc in RTP-Info response to PLAY command and sequence number
>  of the rtp packets that follow. Often base seq is higher than seq of
>  packets, therefore server discards them.

Before 1.1.0, the RTP Info carries the sequence number of the next to-be-
packetized RTP payload. Depending on the duration of the output queue compared 
to the packetization time, it is likely to be slightly ahead of the next to-
be-sent packet sequence number.

From 1.1.0, VLC specifies the sequence number of the next to-be-sent packet 

Rémi Denis-Courmont

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