(well, I thought so...) First, I haven't run scan for perhaps 6-12 months, but for various reasons ran it again recently, and just happened to notice that quite a few of the channel tuning details have changed..! This is for the crystal palace transmitter in the UK and quite a few of the channels now have different fec values for both hp and lp params.
Now is this because a previous version of scan was not returning proper values or is this something which I should have been looking out for? The practical upshot is that after correcting these I now get instant, perfect audio-video sync on BBC ONE and BBC TWO using "mplayer dvb://" and all the other channels exhibit symptoms of just starting out of sync and gradually audio/video synchronise over a few seconds. Previously I had a lot of issues with ITV 2 and having the updated tuning params has helped enormously. However, that audio-video sync brings me to my next observed peculiarity. Basically, BBC ONE and TWO have instant and perfect audio/video sync in mplayer, but the other channels appear not to have video pts and so players like mplayer seem to gradually bring everything back into sync, presumably based on the audio timestamps. This corresponds with BBC ONE and TWO being the only two with the PCR pid being the same as the video pid, and the other channels have an independent PCR pid. The PCR pid does seem to be significant because once I add this to vdr's channels.conf file then vdr can get instant audio-video sync without the usual few seconds gradual alignment that otherwise happens. Can anyone confirm this behaviour for them? Also, are there any references as to how the PCR stream should be used in the ts2ps type process? It's not obvious where this is done in the VDR code for example... Anyway, if you are in the UK and using DVB-T then it seems worthwhile checking your channels.conf settings from time to time to make sure it up to date! Thanks all Ed W -- Info: To unsubscribe send a mail to [EMAIL PROTECTED] with "unsubscribe linux-dvb" as subject.
