[Live-devel] openRTSP producing bad video files
finlayson at live555.com
Fri Sep 5 12:47:30 PDT 2008
>On Tue, Sep 02, 2008 at 01:43:54PM -0700, Ross Finlayson wrote:
>> We don't make available old versions of the code, and offer absolutely no
>> support for old versions. Everyone should work with the newest version
>> of the code.
>Ok Ross, one more question... Can openRTSP cope with a variable
>framerate stream? If, for example, my encoding hardware can't keep up
>and is sending out a stream that changes framerates, is it possible that
>openRTSP would produce a file that plays at the wrong speed?
The problem is not openRTSP, or RTP/RTSP in general. The problem is
the ".mp4"/".mov" file format. This file format is badly designed
for what openRTSP is trying to do: record - into the file - incoming
RTP streams. The code - for recording into ".mp4"/".mov" files -
assumes that the frame rate is fixed (and specified in advance with
the "-f" flag to openRTSP). If the frame rate is actually variable,
then I'm not sure the resulting file will play properly.
If, however, your stream really does have a fixed frame rate, but
packets just happen to be sent at non-fixed intervals, then that
should be OK.
Live Networks, Inc.
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