Speeding Up channel zapping (1 Viewer)

m0t0k0

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November 25, 2010
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There have been many threads about this subject but none of them seem to touch on this post I found on the XBMC forum
http://forum.xbmc.org/showthread.php?tid=141039&pid=1278121#pid1278121

I was asking if I could change codecs to aid in lowering zapping time in XBMC the responce was no but they can work on the codec (FFmpeg) to allow faster switching.

Now MediaPortal has support for LAV which is based on FFmpeg so can we maybe use these changes to benefit the MediaPortal community?

Quote:
I'm still trying to find a way to speed-up the channel switches, but this probably requires patching ffmpeg.

We have been working on this: https://github.com/FFmpeg/FFmpeg/commit/...73f7b49702

Now we can detect pmt changes on the fly and can skip analyzing the stream for ts. You need to send pat/pmt changes in the stream.
 

tourettes

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    From XBMC forum:

    Now we can detect pmt changes on the fly and can skip analyzing the stream for ts. You need to send pat/pmt changes in the stream.

    MediaPortal (TsReader.ax in more detail) has done such from the day one - it works in such way with all the video decoders.
     

    m0t0k0

    Portal Pro
    November 25, 2010
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    Bicester
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    United Kingdom United Kingdom
    O good to know. I still find that codecs have a huge impact on switching times

    I found in MePo that zapping speed seems to be most affected by codec
    (1.3.0.Beta on server and client)

    LAV = 8 sec (SD to HD or HD to SD)
    Microsoft = 8 sec (SD to HD and visa versa) but (SD to SD or HD to HD) = 3 sec

    If you would like me provide logs then I can do this tonight.
     

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