Marc Aronson wrote: > Stuart, thank you for replying. I had read that page but when I set it up it > would only actively transcode ".avi" files -- it would not transcode my > ".mpg" files. As an experiment, I renamed the ".mpg" files to end with > ".avi" and it is now transcoding those files and the audio sync is fine. The > problem I am now facing is that I am seeing a bit of video "jerkiness". > About every 5-10 seconds there will be a brief pause/freeze in the video, > then it will resume playing again. This pause / freeze lasts a fraction of a > second and does not create any audio problems, but it is very noticeable. > > I've tried setting the quality levels at VCD, SVCD and DVD. VCD and DVD both > exhibit the same problem; SVCD doesn't appear to work at all. Some > additional info: > > 1. The video plays smoothly on ".mpg" files that were recorded by a > Hauppuage PVR-250. > > 2. This problem only occur with the clear-QAM recordings created from the > Comcast digital source and that are transcoded via the on-the-fly VLC > transcode interface. > > 3. The clear-QAM recordings play smoothly on the native mythtv player, so > the source is good. > > 4. The clear-QAM recording resolution is 704x480; bitrate=1.5mbps, > fps=29.97, audio codec=a52 > > 5. I've tried 2 dongle versions: Release 0.3.4 and daily build from > 12/25/08. > > Thanks in advanced for any guidance or help you can provide -- it is greatly > appreciated! > > Marc > > -----Original Message----- > From: stuart [mailto:[email protected]] > Sent: Friday, December 26, 2008 11:32 PM > To: Marc Aronson > Cc: [email protected] > Subject: Re: [Mvpmc-users] A/V sync issues on ATSC recordings > > > > Marc Aronson wrote: >> I've got my MediaMVP working against a mythtv 0.21 / Knoppmyth R5.5 >> install but I am running into the A/V sync problem that occurs with >> digital ATSC streams. If I am properly interpreting the various threads, >> it sounds like the MVP hardware doesn't have the processing power to >> deal with the audio streams that are embedded in this type of >> transmission ( >> > http://www.nabble.com/Re%3A--mvpmc---MythTV--Audio-video-sync-problem-td1506 > 9913s24861.html#a15069913 >> ). >> >> >> >> Question: Is there some way I can leverage the vlc transcoding mechanism >> to do an "on the fly" transcode of the audio track to something that the >> MVP hardware can deal with? I'm fine with accessing my myth recordings >> through the MVP file browser interface. >> >> >> >> Marc > > Have you read this page?: > http://mvpmc.wikispaces.com/vlc > ...let us know how it goes for you. >
My guess is that your server is under powered or has a bottle neck somewhere (i.e. maybe you are I/O bound, ect...). I haven't set this up as I suspect I will have similar results. That is, my MBE can not play or serve up ATSC/HDTV recordings very well despite it bing a 3GHz machine. Probably something to do w/the Celeron chip. I've improved things somewhat w/playing around w/HDD latency (i.e. how long the HDD can keep the bus after an access). But I think the real solution is to go to a dual core processor. My SBE is a dual core and can play back most anything. Ah, there's where I should actually set up my VLC server! BTW, has anyone had the experience of setting up a VLC server w/a MBE and SBE? Does the server only work for the videos on the machine it is running on? Or can VLC server up the videos from the other box as well? ...thanks ------------------------------------------------------------------------------ _______________________________________________ Mvpmc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/mvpmc-users mvpmc wiki: http://mvpmc.wikispaces.com/
