Hi Roger... Roger Heflin wrote: > stuart wrote: >> Hi Jan... >> >> Jan Vilhuber wrote: >>> On Apr 25, 2007, at 11:58 AM, stuart wrote: >>> >>>> Hi Jan >>>> >>>> Jan Vilhuber wrote: >>>>> Hi there! >>>>> I'm trying to play some HD content recorded with mythtv, and it's >>>>> mpeg-ts, if I see things correctly. Based on a packet trace, I >>>>> can see mvpmc reading the file from the myth server (lots of >>>>> traffic), but the screen remains blank (green, perhaps). >>>> Same here. It probably doesn't work as the band width is too much >>>> for the MediaMVP box. For example, I can play back 480 line >>>> resolution (old shows) recorded by my MythTV box using an ATSC >>>> tuner. But I can not play back 720 or 1080 line resolution >>>> programming. Note, we have always had problems w/synchronizing >>>> digital audio in mvpmc - so, even though I can play back the 480 >>>> line programming, we still haven't figured out the audio >>>> synchronization problem. >>>> >>>>> I understand that this MAY indicate that mvpmc does not >>>>> understand the format (is mpeg-ts i.e. HD mpeg2?). I have VLC set >>>>> up as a server, and if I try to play an avi file from nfs, it >>>>> goes to VLC and has it transcode it successfully (very cool >>>>> feature, that!!). >>>> This is a pain when using MythTV (or actually anything) - but >>>> people have had success renaming their mpge's to .avi files. Then, >>>> mvpmc will think is can not decode the programming and will ask to >>>> have it transcoded. >>>> >>> Can't mvpmc detect the type of data it is receiving from the stream >>> itself? I thought mpeg files carry such identifiers (or avi for that >>> matter). If so, then mvpmc could stop reading the stream, and switch >>> to the vlc mechanism. >>> >>> jan >> I am not the expert here for this type of thing - but I think most if >> not all ATSC is mpeg2 (some satellite feeds are more compressed). So, I >> don't think it's the format, I think it's the amount of data that the >> MediaMVP box can not handle. If true, and if the MythTV back end would >> screen for the bit rates of different files, then, maybe, MythTV could >> transcode to a lower bit rate or there may be a creative way to tell the >> client to pull the file using VLC - which could do the transcoding. >> Just thinking out loud... anyone know different? >> > > According to the datasheet the MediaMVP cannot handle more than > 12Mbits so even if it could handle the 720p or 1080i resolution (which > I also think there is probably a limit there too) the bit rate > would be too high. > > You could detect the audio being not decodeable, and go to VLC, or > one could detect wrong resolutions and go to VLC. But someone would > need to code these features in. > > Right now I deal with by having an automatic process that makes symbolc > links to all of the files in the highdef directory with .avi on it, and > then view via the file viewer with vlc.
Ha! the audio not decodeable! That's an idea. Although, if it is easy, you are still faced with setting up all those locally mirrored files. Or would you be? Hummm... VLC only works on mvpmc while in the file browser. If you are in the mythtv application of mvpmc and you started receiving a file w/o normal audio you couldn't tell mythtv to use VLC. I think what this detection buys you is that you may be able to NFS export your mythtv files and mvpmc might then detect which do not have ordinary audio and ask VLC to transcode. So, it would save you from having to make the soft links w/the different avi file name endings. I am assuming that mvpmc will be able to at least tell that there is no regular audio. Right now I am not sure if it gets that far. But you would not get all the great native mythtv support like file show names and the like. You would be left with long files names that look like dates and times. I still think the best would still be if mythtv back end would handle client limitations. ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Mvpmc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/mvpmc-users mvpmc wiki: http://mvpmc.wikispaces.com/
