Eric Sharkey wrote: > Just to clarify: They're planning to eliminate clear QAM for "Expanded > Basic". The lowest tier channels, such as ABC/NBC/FOX/PBS, will > remain in the clear, so if you watch any of those channels there will > still be utility in the HDHR.
Correct. I didn't mean to be misleading. Just that Comcast is continuing to provide "Basic" channels via analog, making the HDHR redundant when it comes to those channels. Of course the HDHR provides digital quality, which is an improvement over the analog signal, even if less convenient with an MVP. > Tom Metro wrote: >> Now I'm seeing for the first time what its like to playback an HDHR >> sourced video with mvpmc, and its far worse than merely out of sync >> audio. The audio stutters, and the video freezes. mvpmc effectively >> locks up and requires a soft reset. > > That's consistent with my experience. I stopped using my MVP some > while back in part because of this. > >> The obvious first thing to try will be transcoding the audio. I'll >> process one video manually and see how it goes. Transcoding the audio did indeed fix the problem. Earlier reports on this list of the AC3 audio being out of sync gives the impression the video is still playable, which it isn't. I did a manual transcode using Avixmux. Using an MPEG-PS container, I copied the video stream and converted the audio to MP2, 48KHz. (I believe the MVP would have happily have taken MP3 audio, but Avidmux has a hard coded restriction. When you select an MPEG container, it assumes you want DVD compatibility, and forces you to use MP2 @ 48KHz.) >> If that fixes it, I'll revisit Roger's transcoding wrapper script. > > I could never get Roger's script to work correctly. After transcoding > to mp3 the audio was always out of sync. It wasn't an mvpmc issue, as > the transcoded file would play with the audio out of sync wherever it > was played from. Odd. My transcoded file was off slightly - 5 or 10 ms - but easily corrected with a few taps of the record button. Did you experiment with the time shift option on mencoder? Avidmux has similar options, but I haven't tried them out. I'm not sure which transcoder I'll end up using. I tend to see better quality from mencoder, but it runs into problems more often than ffmpeg. Given that this is audio-only transcode, ffmepg will probably do the job adequately. >> Is it possible to configure MythTV to transcode all videos from a >> particular source? I do see in the recording profiles, which are specific to each tuner, an "Enable auto-transcode after recording" checkbox. The help text says, "Automatically transcode when a recording is made using this profile and the recording's schedule is configured to allow transcoding." I'll have to do some more digging, as that's still vague. What kind of transcoding does it apply? Other observations: There are apparently no options to set resolution and bitrate settings for HDHR recording profiles. I gather that's probably because the HDHR doesn't have an API to specify resolution/bitrate, seeing as it is passing through the bitstream, rather than encoding an analog signal, like the PVR cards do. So I guess transcoding the video is the only option, if you want to shrink storage requirements for recordings where you don't need full quality. Being able to assign a specific transcode config to each recording profile would be necessary to pull that off. Commercial skip doesn't seem to work. Not unexpected, given the earlier conversations on this list with Michael Drons. It seems a tweak to the SQL should resolve this, but I'll track down that detail later. -Tom ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Mvpmc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/mvpmc-users mvpmc wiki: http://mvpmc.wikispaces.com/
