[mythtv-users] XvMC and MythDVD Internal Player (0.20)
list-mythtv at bluecamel.eml.cc
Thu Sep 21 00:49:35 UTC 2006
On Sep 20, 2006, at 2:13 PM, Michael T. Dean wrote:
> Yeah. 0.20 made the Internal player the default for DVD's so we could
> get more testing and feedback.
Not yet fully baked but smelling pretty nice :)
Obviously this is my opinion, so let me give some detail. I'm open to
helping out improving the Internal player any way I can. I'm
comparing the Internal play to mplayer output. For video sources I'm
using some different possible sources:
1) mpeg clips captured from OTA ATSC using a Fusion HDTV5 Gold RT.
Clips are 1080i with either DD 2.0 or DD 5.1 sound
2) Standard region 1 DVDs with either DD 5.1 or DTS 5.1 sound tracks
3)a 1080p DD 5.1 clip that was mastered from a demo disc
3b) 1080p DTS 5.1 clip. (Same as above, different sound track)
Note: Currently I'm having SOUND issues with any of these sources.
Internal player _always_ sends a PCM 48khz (2 channel?) signal out my
SPDIF to my A/V receiver. I'm still troubleshooting this issue. Using
mplayer and -vfm hwac3, the correct soundtrack is always passed out
I test this by using mythtv to capture a HDTV show from one of our
local stations. After the capture is done I play it back through
MythTV (while nothing else is recording) and I compare it to playback
through mplayer outside of mythfrontend. With MythTV playback I seem
to have to do more "work" to get the same quality as mplayer. The
first issue is that Internal doesn't handle the interlaced content as
well as mplayer does. (I'm using linerblend in MythTV and -vf pp=lb
in mplayer) While the source material is challenging to work with
(just look at the mplayer or mythfrontend -v playback logs) it seems
like mplayer does a better job both deinterlacing and keeping the
playback smooth. I never see tearing due to vsync issues or judder
with mplayer. I see these at times with MythTV.
I would guess that OTA HDTV signals are the most challanging to work
with. is there a place where MythTV users can upload short (very
short) clips that present problems so the developers can do testing?
Generally these look equally good in either mplayer or mythtv.
Mplayer currently does a better job with subtitles and cc data than
Internal player does however. I have one DVD that plays okay but the
DVD menu transitions are played back at what seems like 2x speed. For
example, from the DVD menu I would choose "Features" and the little
video transition to the features menu is played back faster than it
should be. I haven't done extensive DVD menu testing however but over
all I'm very pleased to see the Internal player have an option for
Is there any chance that an option could be added so that the movie
is played directly without showing the DVD menu? What about a "play
list" type feature where a short "welcome to the movies" like clip
could be played before playing the main DVD title next?
1080p DTS and DD clips
These just look great in both mplayer and MythTV Internal. Nice work
there :) No dropped frames and nice smooth pans.
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