Videos with non-square pixels do not display at correct aspect ratio (1 Viewer)

qb123

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September 6, 2008
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TV-Server Version:
MediaPortal Version: 1.0 RC2
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Windows Version: Windows XP SP3
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Video Card: ATI HD3850
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MPEG2 Video Codec: MPV Decoder
MPEG2 Audio Codec: FFDShow
h.264 Video Codec: CoreAVC
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When I play videos that don't have square pixels from MP My videos, they do not display at the correct aspect ratio. For example a video which is encoded with 640x480 (4:3) but a display ratio of 2.21:1 still plays at 4:3 in MP, but in other players like WMP, MPC, Zoomplayer etc it plays at the correect 2.21:1

I've uploaded a sample video to demonstrate this problem:
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tourettes

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  • January 7, 2005
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    Tested that clip on my dev PC. Both VLC and MediaPortal show the aspect ration correctly.
     

    ronilse

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  • July 19, 2005
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    Hi,
    Does this also occur when using other codecs for video the MPV(we know that codecs has a problem with AR)

    Regards
    Roy
     

    tourettes

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  • January 7, 2005
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    Hi,
    Does this also occur when using other codecs for video the MPV(we know that codecs has a problem with AR)

    File was mpeg4 file, so MPV shouldnt be able to decode that. Or maybe the file extension is just wrong and it indeed a MPEG2 file. That would then use MPV -> aspect ration bug.
     

    ronilse

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  • July 19, 2005
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    Moss
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    Hi,
    Does this also occur when using other codecs for video the MPV(we know that codecs has a problem with AR)

    File was mpeg4 file, so MPV shouldnt be able to decode that. Or maybe the file extension is just wrong and it indeed a MPEG2 file. That would then use MPV -> aspect ration bug.

    Hi,
    nope, downloaded it now & tested - it uses cyberlink h264, but AR it's correct here using MP.

    Regards
    Roy
     

    qb123

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    September 6, 2008
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    Ok I just changed the decoder from coreavc 1.7 to ffdshow and the AR is now correct.

    So I guess it's a problem with coreavc and MP because other players using coreavc display the correct ratio. This is a shame as coreavc is a much better decoder (and is not free).
     

    deebo

    Portal Pro
    April 19, 2006
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    CoreAVC won't handle non standard SAR's (sample aspec ratio).

    If the SAR differs from 12:11 (PAL 4:3), 16:11 (PAL 16:9), 10:11 (NTSC 4:3) or 40:33 (NTSC 16:9), there is a chance that CoreAVC will crap out and display at wrong AR.

    PowerDVD h264 codec displays all SAR's, use that or ffdshow if you have non standard SAR videos.
     

    benjerry

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  • September 26, 2007
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    I also have this problem, using CoreAVC 1.8.5. stream in mkv container plays fine in windows mediaplayer / vlc player with sar 16/15 (720x576 @ 4/3). In mediaportal keeps at sar 1/1.
    Might it be a problem related to driver/hardware? as at another computer (not htpc with output to plasma tv but normal pc wth lcd) it displays correctly.
     

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