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  1. Hi. I have a WMV file that plays fine. I want to edit/recode it but MeGUI can't index it. If I use a simple 'DirectShowSource' script the A/V goes out of sync. I ran the WMV file through wma2wav and it found errors (which it fixed so I now have a WAV file of 'good' audio).
    To make a good edit, here's what I've done:

    Made a low-quality, video only, copy of the WMV using XMRRecode then muxed it with the 'good audio' WAV file. Let's call this new file 'Alpha'.
    I edited the WMV file using DirectShowSource but with no audio (new file 'Bravo').
    I edited Alpha using the same frame numbers (new file 'Charlie').
    I then muxed Bravo with the audio from Charlie.

    Is there a better way of going about this? My thanks for any suggestions.
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    Originally Posted by pooksahib View Post
    Made a low-quality, video only, copy of the WMV using XMRRecode then muxed it with the 'good audio' WAV file.
    Unless that WMV is VERY-old, you should be able to remux it losslessly to an intermediate AVI file through VirtualDub's direct stream-copy option.
    Since the release of Windows Media Player 11 and its codecs, all WMV9 files (i.e., with FourCC = WMV3 or WVC1) have constant frame rate and so they can be safely remuxed as .AVIs.

    P.S.: If you use DirectShowSource, make sure the DirectShow graph uses LAV Filters and not anything from Microsoft. FFVideoSource still is more reliable than DirectShowSource.
    Last edited by El Heggunte; 26th Mar 2020 at 03:10.
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  3. Hi El Heggunte and thank you for that. I've downloaded VirtualDub 64bit portable from this forum but I can't load my WMV as "ASF files are not supported". My WMV is indeed WMV3. What do you think I'm doing wrong?
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  4. Try to load it in MKVToolnix gui and remux to mkv
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  5. That would be the ideal, ProWo, but toolnix has never accepted WMVs.
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    @pooksahib:

    there exists a WMV input plugin for VirtualDub; but you will also need a WMV VfW decoder

    ffdshow includes one, if you don't want to install the original (and ancient) WMV9 VfW codec from Microsoft.

    http://gral.y0.pl/~fcchandler/Plugins/WMV/index.html
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  7. Many thanks, El Huggunte. The plugin was easily installed but the list of options when installing ffdshow was a bit daunting. I don't know if I ticked or unticked something that I shouldn't have but virtualdub continues to say 'missing codec' when I load the WMV.

    Where can I find the old Microsoft codec? Googling for it didn't help...
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    Originally Posted by pooksahib View Post
    Many thanks, El Huggunte. The plugin was easily installed but the list of options when installing ffdshow was a bit daunting. I don't know if I ticked or unticked something that I shouldn't have but virtualdub continues to say 'missing codec' when I load the WMV.

    Where can I find the old Microsoft codec? Googling for it didn't help...
    look for the FFDshow VFW configuration/decoders
    enable all the WMV items
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  9. Thanks, davexnet. How to get to that screen, though? There's nothing GUI-like in my ffdshow program folder...
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    Originally Posted by pooksahib View Post
    Thanks, davexnet. How to get to that screen, though? There's nothing GUI-like in my ffdshow program folder...
    Didn't it create a program group accessible from the Start Button?

    I looked at the properties of the short cut and it says this (this is from a Windows XP system)
    C:\WINDOWS\SYSTEM32\rundll32.exe "C:\WINDOWS\system32\ff_vfw.dll",configureVFW
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  11. Thanks again. Change of plan, though - WMVs are so rare that, for the couple I have here, I'm just going to use the method described in my first post. It works well, if a tad convoluted.
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  12. Try to remux with my clever FFmpeg-GUI. I just loaded a WMV file and remuxt it into a MKV file. It worked.
    https://forum.videohelp.com/threads/396490-clever-FFmpeg-GUI-a-new-small-GUI-for-FFmpeg
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