Best way to convert 2:35:1 XVID to 16:9?

Discussion in 'DivX / XviD' started by Prodeje79, May 25, 2008.

  1. Prodeje79

    Prodeje79 Member

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    I have found a few threads, but I am not sure the best way to attack this.

    Technically I have a playback issue in that the video is distorted on my 16x9 TV, but I bet the fix is to add some borders to the top and bottom.

    I started messing around with Virtualdub and the info in this thread: http://club.cdfreaks.com/f32/subtitles-getting-cut-off-screen-127537/#post1739902

    There is an option under the resize vid filter to Letterbox to aspect ratio. I set that to 16:9 and use a grey color to help prevent burn in.

    This is already a complete AVI DIVX xvid mpeg4 and I just want to keep the existing video encoding the same. Also keep the AC-3 audio intact. Is this the "null transform" filter as mentioned here: http://forums.afterdawn.com/thread_view.cfm/664335

    OK I think I am not on the right track here, that option null transform is for cropping....



    .... so back to my original question....
    What is the best way to convert a 2:35:1 XVID to 16:9 adding the top and bottom borders? Again I would like to keep the existing encoding/codec the same and just fix the size somehow.
     
    Last edited: May 25, 2008
  2. attar

    attar Senior member

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    To letterbox the source:under 'Video' 'Full processing mode' 'Filters' select 'Resize'.
    Leave the size as the source size (in this case 452x190)then set the letterbox aspect ratio to 16:9 - in this case the resolution of the output is now 452/254=1.77=16:9

    For the video encoding you select the same compression as the source.
    'Video' 'Full processing mode' and choose XviD or DivX - assuming that these codecs are installed.

    For the AC3, under the 'Audio' tab choose 'Direct stream copy' (this also supposes that the VirtualDub ACM plug-in is installed.




    [​IMG]
     
  3. Prodeje79

    Prodeje79 Member

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    Thank you so much!!!!!!!!!

    That is pretty much what I did except I added grey bars to the bottom to help reduce burn-in on my CRT widescreen rear-projection 16x9 TV.

    I think I need a little help with the video compression part. So I need to use GSpot to determine what the source was using and then try to replicate the settings, right? I assume the VirtualDub "File Information" does not include enough info.

    If you could provide help on tweaking/configuring this I would be help. My main concern is replicating the source, keeping the size about the same.

    Thanks again!

     
  4. attar

    attar Senior member

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    Load the file and click 'File' 'File Information'.
    The codec ID and the data rate are listed along with most of the other relevant information.

    The only tweaking I use is to nudge the data rate and hope to keep the quality of the original - for knowledgeable advice best start a new thread at Afterdawn or http://www.videohelp.com/ or the VirtualDub forum http://forums.virtualdub.org/index.php?s=946ce8aa4338b9ffe4a53e5a9775dac5
    where the creator of VirtualDub moderates and offers real help.

    Because I have the DivX codec installed, I simply select the 'Home Theatre' setting and increase the data rate slightly and either abort the conversion to judge the quality of the new video or select a particular clip with the slider/clipping tools and save that.

    The image shows the initial data rate, the adjustment from the default in the codec settings and the final result.

    [​IMG]
     

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