[mythtv] Re:Transcoding pvr-250 files
ou401cru02 at sneakemail.com
Tue Aug 26 23:13:44 EDT 2003
On Tue, 26 Aug 2003 18:29:11 -0400, "Christopher Hash
chash-at-actgate.com |mythtv/1.0-Allow|" <0rqrhk90120t at sneakemail.com>
> When I tried using the transcoder in mythtv (hitting 'X') on a PVR-250
> recording, the transcoded result (mpeg4) finished, but playback in myth
> playing in slow motion, audio and video. What outputs can I give you to
> help? Also, what is the _correct_ procedure for restoring the .old
That doesn't sound good. Are you using the same audio sample rates in
the mpeg2 and mpeg4 streams (48kHz is normal for MPEG2 if I am not
mistaken). that is required, and I have been meaning to enforce it in
the transcoder. Please send me all the settings for your profiles.
select * from recordingprofiles;
select * from codecparams;
from within mysql may be useful.
> up version. Just renaming it seems to confuse parts of mythtv. For
> example, I tried just renaming, and rerunning, and it played it ok, but
> cutlist editor wouldn't run at all.
> Using CVS updated last night.
> Chris Hash
> ----- Original Message -----
> From: "Geoffrey Hausheer" <ou401cru02 at sneakemail.com>
> To: <mythtv-dev at mythtv.org>
> Sent: Tuesday, August 26, 2003 3:10 PM
> Subject: Re: [mythtv] Re:Transcoding pvr-250 files
> > On Tue, 26 Aug 2003 12:19:36 -0400, "Vinton Coffman
> > vintonc-at-redzone.com |mythtv/1.0-Allow|" <661whj4npx0t at sneakemail.com>
> > said:
> > > sampling rate 48000
> > > codec uncompressed for the first one and mp3 for the second one
> > >
> > > The first file went from 1.7 GB to 953 MB with uncompressed audio. The
> > > second file went from 1.7 GB to 652 MB using mp3.
> > >
> > > Both files play through with really good audio and video quality. I
> > > edited the cutlist before transcoding. There were 2 commercial breaks
> > > in each that I marked. Transcoding honored the cutlist and removed
> > > these sections just fine, however, the elapse timer for the show still
> > > indicated that the show is 30:00 in length. The one show ends with the
> > > timer displaying 20:50 which sounds reasonable with the commercials
> > > removed.
> > >
> > > Shouldn't the elapse timer reflect the real length of the show after
> > > transcoding or is it using the length from the database?
> > It sounds like the seek table isn't being stored in your new nuv files.
> > Either that, or the latest seek patches are causing issues (very
> > unlikely). When did you last update your myth CVS? This should not be
> > hard to fix, I'll take a look at it when I get a chance. I'm kind of on
> > hold submitting new patches until Isaac either applies or throws away my
> > verbose patch, since changes to the transcoder will conflict with that
> > previous patch one way or the other.
> > However, it might also be exposing a bug in the decoder, since I believe
> > it should rebuild the seek-table in the case where none is found. I hope
> > you kept your original nuvs around...it is unlikely this can be fixed
> > without re-transcoding.
> > >
> > > As I mentioned above the files play through without a hitch, however,
> > > you can't scan or skip forward or reverse. The OSD updates to indicate
> > > the first skip increment current position +/- increment but not any
> > > additional increments. The actual video update doesn't occur. The
> > > info OSD's still pop up and fade correctly but the video doesn't resume
> > > playing. You can still exit the video and it says "Saving Position"
> > > but when you select the video again it starts playing at the beginning.
> > Again this really sounds like I screwed up the writing of the seek table.
> > I think I have everything I need to debug and fix this.
> > .Geoff
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