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[Didier Barvaux <question254639@xxxxxxxxxxxxxxxxxxxxx>]

Question #254639 on rohc changed:
https://answers.launchpad.net/rohc/+question/254639

    Status: Open => Answered

Didier Barvaux proposed the following answer:
Hello,

The RTP detection from the sniffer is targeted at VoIP traffic, that's
why it decides that packets that are greater than 200 bytes are not RTP.
That's an implementation choice. The video1 test file contains a video
stream. It is much larger than VoIP and won't be detected as RTP by the
sniffer tool.

The RTP standard (RFC 3550, §11) says that RTP  should use even
destination ports. The video1 test file contains a RTP video stream with
destination port 1234 as expected. However, the RTP detection from the
sniffer is not correct, it shall not check the source port to be an even
number. I fixed that.

Regards,
Didier

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