AC3 passthru and 16:9 support

Request new features that might make Gentoox MCE better.
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nobspangle
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AC3 passthru and 16:9 support

Post by nobspangle » Sun Aug 08, 2004 9:08 am

I'm quite pleased to see that the sound is output from the optical connector, but it is just an spdif mirror of what is coming out of the analogue connectors. Could do with adding AC3 passthru and later DTS.

16:9 support is slightly more important, for me it kind of makes this media player useless since it can't output 16:9 videos to a 16:9 TV without having squashed fat faces and black bars at the top and the bottom of the screen.
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Post by sord_fish » Sun Aug 08, 2004 12:17 pm

also if there could be an option to control the audio output to all speakers that would be a nice feature as well.

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Post by ShALLaX » Sun Aug 08, 2004 2:44 pm

The Xbox has no mixer, so i dont know if thats possible... 16:9... ill have to look in to, to be honest i didnt know if that was even possible. If you want to paste me a modeline, so much the better!
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Post by nobspangle » Sun Aug 08, 2004 10:32 pm

I'm not sure a modline will fix it, trouble is mythtv is assuming that the screen is 4:3 so if I play a 16:9 movie it presents it in a letterbox. The media player needs to know the aspect ratio of the screen. I might check with the mythtv developer to see if he has any sugestions. You can't have a catch all situation, every film is different. DVD's are anamorphic so they need to be treated differently. What media player is mythtv using? There maybe something that can be tweaked there.

Has anybody tried the media centre on a 720p HDTV? What kind of results do you get there when playing back 1.85:1 DVDs and 16:9 DivX/XviD (640x352 etc)
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Post by ShALLaX » Sun Aug 08, 2004 11:31 pm

Thinking about it.. the issue could be the kernel driver itself... since its only programmed to do specific resolutions. Currently, mce is using mplayer.. but im planning on switching to Xine for dvd playback.
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Post by nobspangle » Mon Aug 09, 2004 7:23 am

there is an option for mplayer

Code: Select all

-monitoraspect 16:9

I'll check it out when I get back from work, there is also one to pass ac3 to your spdif output

Code: Select all

-ac -hwac3
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Post by ShALLaX » Mon Aug 09, 2004 4:08 pm

Youll need to edit /media/.mythtv/mplayerlaunch to add those...
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Post by nobspangle » Sat Aug 14, 2004 8:54 am

OK finally got round to testing this. The 16:9 setting is great (most of the time) the ac3 setting doesn't work, it just breaks the sound output.

The reason why I say most of the time for the 16:9 setting is that it's fine if you are watching a widescreen movie, but if you want to watch something that has a 4:3 aspect you get black bars down the sides of the screen, which (whilst being geometrically correct) isn't really what you want. I don't really know how you get round this, 4:3 video should fill the screen, anything 16:9 or wider should play at the correct aspect ratio.
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Post by lotw » Sat Aug 14, 2004 5:52 pm

nobspangle wrote:OK finally got round to testing this. The 16:9 setting is great (most of the time) the ac3 setting doesn't work, it just breaks the sound output.

The reason why I say most of the time for the 16:9 setting is that it's fine if you are watching a widescreen movie, but if you want to watch something that has a 4:3 aspect you get black bars down the sides of the screen, which (whilst being geometrically correct) isn't really what you want. I don't really know how you get round this, 4:3 video should fill the screen, anything 16:9 or wider should play at the correct aspect ratio.


Actually I would rather have the black bars on the side for 4:3 then stretching. Correct aspect ratio is more important.

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Post by ShALLaX » Sat Aug 14, 2004 6:32 pm

Next version will use Xine.. so maybe that will be different.
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Post by nobspangle » Sun Aug 15, 2004 11:21 am

lotw wrote:Actually I would rather have the black bars on the side for 4:3 then stretching. Correct aspect ratio is more important.

My TV does a sort of zoom and stretch mode with a 4:3 image so the distortion is hardly noticeable, you loose a bit of picture top and bottom, but I would rather that than waste screen real estate.
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Post by ShALLaX » Sun Aug 15, 2004 6:01 pm

The moral to this story is, always buy the cheapest 14" TV you can find ;)
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