[Live-devel] Discontinuous rtp stream using testOnDemandRtspServer with h264 mkv input files

[Ross Finlayson]

> You can download a sample .mkv file on https://dl.dropboxusercontent.com/u/35983566/test.mkv <https://dl.dropboxusercontent.com/u/35983566/test.mkv> (is it ok to use links on this mailing list?

Yes, of course - in fact, it’s far better to include a link to a large file than to try to include it in the email message.  (On the other hand, it’s unprofessional email addresses - like “@yahoo.<anything>” - that are discouraged on this mailing list :-)


> Please let me know if there is any incompatibility between the live555 server and the way the file is encoded/muxed

The problem with this file is that although frames appear in the file 40ms apart (i.e., indicating a frame rate of 25 frames-per-second), the SPS NAL unit (which appears in the file’s header) uses a time_scale of 300, which indicates 150 frames-per-second.

(From what I can tell, our server is actually streaming the file properly - at 25 frames-per-second; however, it’s VLC that’s getting confused by the inconsistent time-scale that’s in the SPS NAL unit, so it thinks that the frame rate should be 150 frames-per-second.)

So, there is a problem (inconsistency) in the way in which you encoded and/or recorded the frame rate, which you need to fix.

Ross Finlayson
Live Networks, Inc.
http://www.live555.com/

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