[vlc-devel] Question regarding streaming video packetisation in VLC

Fred Matthews fredmm at hotmail.co.uk
Wed Jul 27 10:13:34 CEST 2011


I would really appreciate if someone can advise to the below query as
soon as possible.

Thank you very much!

On Tue, Jul 26, 2011 at 1:20 PM, Fred Matthews <fredmm at hotmail.co.uk> wrote:
> Hi all,
> I have a few queries regarding VLC and would be much appreciated if
> some can help out:
> I want to modify the length of the video packet VLC limits when
> streaming via UDP/RTP etc. The current length VLC seems to use is 1324
> bytes via UDP and 1336 bytes via RTP (at application layer exc. any
> headers from lower layers), discovered via packet capturing.Thus is
> there any way to change this value. How would I be able to modify the
> this packet length in this case?
> I also find that the traffic type of video streaming via VLC to be
> registered as Best effort.
> I am streaming a clip from Big Buck Bunny [1080p at 24.0, 4:2:2
> chroma, 70 Mbps CBR (with no zero stuffing) in a 73 Mbps Transport
> Stream] with no transcoding, and the link reaches stable throughput of
> 200Mbps. I have tried streaming many video formats but I still get the
> traffic type (in QoS header) to be Best Effort when it should Video.
> Also the first few seconds of the streaming trigger several "packet
> has been too late" and "TS discontinuity" (not sure what this is?)
> error messages, and the last two seconds of the video stream never
> reaches the client, but in between streaming seems fine. I would be
> very grateful if some can kindly advise.
> Many thanks

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