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<blockquote data-quote="henning" data-source="post: 499535" data-attributes="member: 78357">They can be changed, but they must't. Especially for the Astra satellite system, it is very unlikey that PCR and Video PID are changed (an exception is here the linkage stuff of Premiere/Sky VOD; but this is - signalling wise - a completely different story). Maybe an audio PID is added or deleted. But anyhow, there is no harm in starting the decoder with an invalid PID, isn't it? In worst case the decoder will report a buffer underrun. The PID parsing can anyhow be done in the background and the (most likely audio-) decoder can be restarted if necessary. I still think that channel change will be quicker in this way for most cases (and even more important: it would very likely give me and the others here in the thread a tv picture again).In a 2nd step it might be an idea to parse beside the EPG data in the background also the PMT data to keep the PMT database as actual as possible. But this shouldn't be the term of discussion here.RegsHenning</blockquote>

[QUOTE="henning, post: 499535, member: 78357"] They can be changed, but they must't. Especially for the Astra satellite system, it is very unlikey that PCR and Video PID are changed (an exception is here the linkage stuff of Premiere/Sky VOD; but this is - signalling wise - a completely different story). Maybe an audio PID is added or deleted. But anyhow, there is no harm in starting the decoder with an invalid PID, isn't it? In worst case the decoder will report a buffer underrun. The PID parsing can anyhow be done in the background and the (most likely audio-) decoder can be restarted if necessary. I still think that channel change will be quicker in this way for most cases (and even more important: it would very likely give me and the others here in the thread a tv picture again). In a 2nd step it might be an idea to parse beside the EPG data in the background also the PMT data to keep the PMT database as actual as possible. But this shouldn't be the term of discussion here. Regs Henning [/QUOTE]

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