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  1. Member
    Join Date
    Feb 2004
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    Australia
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    Have a captured AVI, I need to remove the start where you see me start my screen cap software and the end when I press stop.

    It was captured in XVID (gave good output for the final SWF conversion) and anyway I followed guides like this:

    https://www.videohelp.com/oldguides/virtualdubedit

    BUt it doesnt seem to trim my video, the output just ignores my start and end points if I use Direct stream copy. I seem to loose quality quickly if I recompress.

    MY steps are:

    1 - Load video
    2 - Mark in where I want to start
    3 - Mark out where I want to end
    4 - Set video compression to direct stream copy
    5 - Save as AVI

    End result always contains the beginning and end I tried to crop out.

    Can someone explain where im going wrong. Havent fiddled with vid editing in a while and everything im doing right now is going wrong! thought this would be easy.
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  2. Always Watching guns1inger's Avatar
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    Apr 2004
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    Miskatonic U
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    Direct Stream Copy will only cut on I (key) frames. Enable Smart Rendering, set your compression to CQ of 2 or 3, and only the cut points will be re-encoded
    Read my blog here.
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  3. Member
    Join Date
    Sep 2007
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    United States
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    Originally Posted by Rudyard View Post
    Have a captured AVI, I need to remove the start where you see me start my screen cap software and the end when I press stop.

    It was captured in XVID (gave good output for the final SWF conversion) and anyway I followed guides like this:

    https://www.videohelp.com/oldguides/virtualdubedit

    BUt it doesnt seem to trim my video, the output just ignores my start and end points if I use Direct stream copy. I seem to loose quality quickly if I recompress.

    MY steps are:

    1 - Load video
    2 - Mark in where I want to start
    3 - Mark out where I want to end
    4 - Set video compression to direct stream copy
    5 - Save as AVI

    End result always contains the beginning and end I tried to crop out.

    Can someone explain where im going wrong. Havent fiddled with vid editing in a while and everything im doing right now is going wrong! thought this would be easy.
    Rudyard,
    I always do it by deleting the sections I don't want to keep. That seems to work. I delete because I am normally removing commercials from a broadcast capture and they are non-contiguous.

    1 - Load video
    2 - Mark in where I want to start the cut
    3 - Mark out where I want to end the cut
    4 - Select edit from the options at the top of the screen and select delete from the drop down menu
    5 - repeat steps 2-4 until all the sections that need deletion have been accomplished
    6 - Set video compression to direct stream copy
    7 - Save as AVI

    I have never tried the crop to selection drop down item, that might do what you want for a contiguous range of frames and your work flow - Just tried that with one of my .avi captures and it worked.

    guns1inger's comments about cutting on I frames is correct. I don't have I,P, or B frames since my gear captures in DV - just straight frames. So my crop points don't have any limitations. When I have edited MPEG files directly I use Cuttermaran and if the cuts are not on I frame to I frame the program re-encodes only those frames. There are probably other editing programs that will do the same. I've never tried editing XDIV files.

    rcubed
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  4. Member
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    Feb 2004
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    Australia
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    Thanks for your help, will give it a try and post results.
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  5. Mod Neophyte Super Moderator redwudz's Avatar
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    Sep 2002
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    USA
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    Xvid/Divx have a default keyframe setting of about 300 frames, so frame accurate editing is very difficult. This is common with most highly compressed formats. The smart rendering in VD, as mentioned, is a easy way to get around this limitation. An alternative I have used for H.264 is to convert to a lossless codec, such as HuffyUV or Lagarith, do your editing and convert back. But that takes time and a lot of hard drive space. Still, it makes it easier if you need to do extensive editing.
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