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I converted an MP4 1080 movie to WMV. The result is a huge 9 GB file. How can I convert it (using FFmpeg) so that the file is decent quality but not huge? Or, how can I split a 9 GB WMV file to two smaller files that can fit on DVD discs?

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For the purpose of playing it back on an HD TV? Not much point. Most DVD players can't handle HD. If you burned that to a DVD in such a way that the DVD player could read it, it would be automatically downsampled to a (high-DVD-quality) SD format for standard DVD (4.3GB). –  Xyon Jan 11 '13 at 14:52
    
Yep. Xyon is right. It is a waste of resources. Unless you plan to write this to a blue-ray disk, you won't be able to use 1080p. HD dvds really are only 720p. –  Josiah Jan 11 '13 at 15:16
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Can you explain why it needs to be a WMV file in the first place? There's usually less playback support for WMV than for MP4 files, anywhere. Also, while converting you'll lose quality, which means that if you tried to make your result file considerably smaller, you'd probably find it pretty bad in terms of visual quality. –  slhck Jan 11 '13 at 17:58
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