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video aspect ratio including OSD
Published by: cfz 2010-03-18
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  • When I record TV shows, the recording mostly starts with some commercials. The aspect ratio when the recording starts could thereby be other then the ratio of the program I intend to record. My recorder creates a video container header based on the beginning of the recording. My TV automatically switches between 4:3 and 16:9 but here's the problem.

    If the recorded mpeg file has aspect 4:3 but the movie has 16:9 and I change the aspect in XBMC, the OSD is written outside the 16:9 frame and my TV doesn't detect a 16:9 movie. Is there a way to change this in XBMC menus or does this need a change in XBMC code?

    When i watch these movies on my PC I use "mplayer -aspect 16:9 test.mpg" and that works just fine


  • When I record TV shows, the recording mostly starts with some commercials. The aspect ratio when the recording starts could thereby be other then the ratio of the program I intend to record. My recorder creates a video container header based on the beginning of the recording. My TV automatically switches between 4:3 and 16:9 but here's the problem.

    If the recorded mpeg file has aspect 4:3 but the movie has 16:9 and I change the aspect in XBMC, the OSD is written outside the 16:9 frame and my TV doesn't detect a 16:9 movie. Is there a way to change this in XBMC menus or does this need a change in XBMC code?

    When i watch these movies on my PC I use "mplayer -aspect 16:9 test.mpg" and that works just fine

    Ok, I did get this to work. I changed the "video" - "player" - "Resolution" setting from "Auto switching between 16:9 and 4:3" to "PAL 16:9". Then it works like a charm...
    Thanks for the best mediaplayer ever.
    P.S. They say that the XBOX also could play games! If so, wouldn't that be a great feature

    Hrm, I do not get this. I have exactly the same issue, but setting my Xbox to force 16:9 PAL does still display stretched 4:3 AVI:s, without black bars when the resolution changes halfway through an AVI? And I do not see what "Auto switching between 16:9 and 4:3" actually does.....

    Am I missing something obvious here?


  • Ok, I did get this to work. I changed the "video" - "player" - "Resolution" setting from "Auto switching between 16:9 and 4:3" to "PAL 16:9". Then it works like a charm...
    Thanks for the best mediaplayer ever.
    P.S. They say that the XBOX also could play games! If so, wouldn't that be a great feature


  • Sorry for *BUMP*ing this one, but are there any ideas?

    What is actually the purpose of the "autoswitch" feature?


  • to make xbmc output 16:9 or 4:3 depending on video source... This assumes that your tv sences this and corrects for it.. if you have a WS tv you normally just want it to be in 16:9 mode all the time and let xbmc handle all the scaling.

    Yes. But if XBMC is to handle the scaling I guess it is to be set to "autoswitch". Though it does only seem to be working if the WS tag of the AVI exists only in the beginning of the AVI and not halfway through it.

    If I understand this correctly.


  • Because you haven't set any other options in the MS Dash.

    Latest SVN versions of XBMC allow you to set the video settings directly from XBMC.


  • Ok, I did get this to work. I changed the "video" - "player" - "Resolution" setting from "Auto switching between 16:9 and 4:3" to "PAL 16:9". Then it works like a charm...
    [/I]

    How come my XBMC doesn't allow me to change this "Resolution".

    It stays at "NTSC 4:3" and doesn't change at all.

    (my XBMC is 2.0.1-FINAL-FAT-T3CH)


  • Your TV only switches if we actually output the 16x9 flag (ie switch to 16x9). If most of your content is 16x9, then just force the player to output in pal16x9 should do the trick shouldn't it? 4x3 content wouldn't be displayed as 4x3 in that context, but IMO that is the lesser evil of the two.

    The alternative is adding some code to switch resolutions when stretch16x9 is invoked and auto-switch is enabled, but a 4x3 viewmode is currently in use (and switch back to 4x3 when stretch 4x3 is selected) but that could be potentially troublesome.

    Cheers,
    Jonathan


  • to make xbmc output 16:9 or 4:3 depending on video source... This assumes that your tv sences this and corrects for it.. if you have a WS tv you normally just want it to be in 16:9 mode all the time and let xbmc handle all the scaling.


  • if you have a WS tv you normally just want it to be in 16:9 mode all the time and let xbmc handle all the scaling.

    Won't that mean you will lose some detail (same resolution used for both 16:9 and 4:3 output)? I agree it's the only way to go with component (since you cannot signal) but with RGB scart I would prefer that 4:3 content is viewed as such and not scaled down and losing details


  • On my Samsung (normal WS CRT) I am not able to change the AR when the input is set to composite.

    To sum-up my scenario:

    An AVI is launched in which the first three minutes are in 16:9 format
    (XBMC is set to autoswitch between 4:3 and 16:9)
    Once the 16:9 section of the AVI is done the 4:3 section starts, though XBMC stretches the AVI, i.e. no black bars

    The only way I manage to get the proportions correct is to alter the settings after the 16:9 section of the AVI is finished, and set the view mode to "Stretch 4:3".

    On my computer (using VLC or WMP) the AVI plays correct.

    Am I thinking wrong, or is there something else wrong?



    Stretch 4:3


  • to make it worse, many LCD TV's have settings for aspect ratios on TV set.

    pade:
    while you change the XBMC "Resolution" to "PAL 16:9", what's the aspect ratio(or display format) setting on your TV set?





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