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MediaPortal 1
Support
Watch / Listen Media
Television (MyTV frontend and TV-Server)
Speeding up channel change
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<blockquote data-quote="Owlsroost" data-source="post: 1031971" data-attributes="member: 83973"><p>No - the 'total zapping time' includes all the TV server channel change time and client/TsReader processing time -</p><p></p><p>it's measured from this point (using the last zap in your TsReader.log as an example):</p><p></p><p>[CODE]07-10-2013 12:33:04.814 [ fe40048] [2338] CTsReaderFilter::Pause() - IsTimeShifting = 1 - state = 2</p><p>07-10-2013 12:33:04.814 [ fe40048] [2338] CTsReaderFilter::Pause() - END - state = 1</p><p>07-10-2013 12:33:04.814 [ fe40048] [2338] OnZapping 80</p><p>[/CODE]</p><p>(playback filter graph transitions to 'paused' before channel change is requested at TV server)</p><p></p><p>....to....</p><p></p><p>[CODE]07-10-2013 12:33:06.094 [ fe40048] [1e1c] CTsReaderFilter::Run(4836.43) state 1 seeking 0</p><p>07-10-2013 12:33:06.094 [ fe40048] [1e1c] Run() - Elapsed time from pause to Audio/Video ( total zapping time ) : 1280 mS</p><p>07-10-2013 12:33:06.094 [ fe40048] [1e1c] CTsReaderFilter::Run(4836.43) state 2 -->done</p><p>[/CODE]</p><p>(graph transitions to 'run')</p><p></p><p>In between those points TsReader is waiting for sufficient data from the new channel to arrive so it can work out what the new video and audio formats are (you might be switching from SD MPEG2 to HD H.264, for example, which would require a partial filter graph rebuild) - this can take some time since the necessary info might only appear in the stream once per second or longer (H.264 streams are usually worse than MPEG2 for this). It then has to make sure enough data is buffered so the decoding restarts cleanly e.g. the decode filters can hang or crash if this isn't handled properly.</p></blockquote><p></p>
[QUOTE="Owlsroost, post: 1031971, member: 83973"] No - the 'total zapping time' includes all the TV server channel change time and client/TsReader processing time - it's measured from this point (using the last zap in your TsReader.log as an example): [CODE]07-10-2013 12:33:04.814 [ fe40048] [2338] CTsReaderFilter::Pause() - IsTimeShifting = 1 - state = 2 07-10-2013 12:33:04.814 [ fe40048] [2338] CTsReaderFilter::Pause() - END - state = 1 07-10-2013 12:33:04.814 [ fe40048] [2338] OnZapping 80 [/CODE] (playback filter graph transitions to 'paused' before channel change is requested at TV server) ....to.... [CODE]07-10-2013 12:33:06.094 [ fe40048] [1e1c] CTsReaderFilter::Run(4836.43) state 1 seeking 0 07-10-2013 12:33:06.094 [ fe40048] [1e1c] Run() - Elapsed time from pause to Audio/Video ( total zapping time ) : 1280 mS 07-10-2013 12:33:06.094 [ fe40048] [1e1c] CTsReaderFilter::Run(4836.43) state 2 -->done [/CODE] (graph transitions to 'run') In between those points TsReader is waiting for sufficient data from the new channel to arrive so it can work out what the new video and audio formats are (you might be switching from SD MPEG2 to HD H.264, for example, which would require a partial filter graph rebuild) - this can take some time since the necessary info might only appear in the stream once per second or longer (H.264 streams are usually worse than MPEG2 for this). It then has to make sure enough data is buffered so the decoding restarts cleanly e.g. the decode filters can hang or crash if this isn't handled properly. [/QUOTE]
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MediaPortal 1
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Television (MyTV frontend and TV-Server)
Speeding up channel change
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