[Live-devel] Server 'trick play' support for MPEG Transport Stream files

[DNA STUDIOS s.r.l.]

from command line the seeking (trick play) in vlc media player work fine,
the problem is in the gui...

> Our RTSP server implementation (and therefore the "LIVE555 Media
> Server", and the "testOnDemandRTSPServer" demo application) now
> supports 'trick mode' operations (seeking, fast forward, reverse
> play) when streaming MPEG Transport Stream files.
>
> For this to work, each Transport Stream file must have (in the same
> directory) a corresponding index file' (with name suffix ".tsx).  You
> create these index files using the "MPEG2TransportStreamIndexer"
> application, whose code is distributed in the "testProgs" directory.
>
> NOTE: Before you run this application, please upgrade to the latest
> version (2007.01.11) of the "LIVE555 Streaming Media" code, and
> rebuild it.  (Earlier versions of the code had a bug that prevented
> the application from working properly on some Transport Stream files.)
>
> To generate each index file, run
> 	MPEG2TransportStreamIndexer <transport-stream-file-name>
> Be warned that this program is currently rather slow, so I suggest
> running it on the fastest computer that you have.
>
> Once you've generated an index file for each Transport Stream file
> that you wish to stream, our RTSP server implementation will now
> handle 'trick mode' operations on the file.
>
> Unfortunately, VLC's GUI currently doesn't handle the trick mode
> operations properly.  (The "LIVE555 Streaming Media" code - which
> implement's the RTSP client protocol in VLC - has all the hooks for
> doing these trick mode operations; however, the VLC code above this
> does not yet use this properly.)  I'll be working with the VLC
> developers to try to get this resolved ASAP, so we can have versions
> of VLC that perform trick play on Transport Streams properly.
>
> Unfortunately the only other client that I know of right now that
> supports 'trick play' operations on MPEG Transport Streams is the
> Amino set-top box (hardware).  (This is what I have been using for
> testing, pending a resolution of the problems with VLC.)
>
> (If anyone knows of any other clients that work, please let us know.
> The 'trick mode' operations are all a standard part of the RTSP
> protocol, so there are likely to be other clients out there that
> support it.)
>
>
> In the meantime, once you have generated your index files, you can
> try running a demo application called
> "testMPEG2TransportStreamTrickPlay" (also in the "testProgs"
> directory) to simulate the effect of 'trick play' operations on
> Transport Stream files.  To run it:
> 	testMPEG2TransportStreamTrickPlay
> <input-transport-stream-file-name> <start-time> <scale>
> <output-transport-stream-file-name>
> where
> 	<input-transport-stream-file-name> is the original Transport
> Stream file name (which must end with ".ts").  There must also be a
> corresponding index file for this file.
> 	<start-time> is the starting play time in seconds (use 0 to
> play from the start)
> 	<scale> is a non-zero integer, representing the playing speed
> (use a negative number for reverse play)
>
> Examples (assume that your original Transport Stream file is named
> "foo.ts", and that you have already generated an index file, named
> "too.tsx"):
>
> testMPEG2TransportStreamTrickPlay foo.ts 0 8 foo8.ts
> 	The output file "foo8.ts" is the original stream, sped up 8x
>
> testMPEG2TransportStreamTrickPlay foo.ts 30 -1 foo-1.ts
> 	The output file "foo-1.ts" is the original stream, played
> backwards (at 1x speed), starting from the 30 second point.
>
> testMPEG2TransportStreamTrickPlay foo.ts 30 -5 foo-5.ts
> 	The output file "foo-5.ts" is the original stream, played
> backwards (at 5x speed), starting from the 30 second point.
> --
>
> Ross Finlayson
> Live Networks, Inc.
> http://www.live555.com/
> _______________________________________________
> live-devel mailing list
> live-devel at lists.live555.com
> http://lists.live555.com/mailman/listinfo/live-devel
>


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