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I want to convert some of the AVI files I recorded (presentations) to FLV so I can host them on a website and offer them to my visitors. I have done this sort of thing before but the quality they came out as would not be good enough for what I plan on doing here.

Does anyone have a link to a guide or any experience they can offer in converting AVI to FLV with minimal quality loss? A lot of my presentations are 720p as well, so I'd want to keep the aspect ratio the same as the source video.

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up vote 1 down vote accepted

I suggest ffmpeg. If you are on windows, I suggest the most recent autobuild.

ffmpeg -i foo.avi -ar 22050 -qscale 1 bar.flv

ffmpeg is very tweakable, so you might try searching for flv specific encoding options. Also see the ffmpeg docs

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Thank you :) That command actually made bar.flv about 300mb bigger than the source .avi file, so looks like I have some tweaking to do, but this gives me a strong base. Thanks again. – Josh Mar 24 '10 at 23:37
@Josh, you could try it without -qscale just to see how it comes out. In theory -sameq uses the same quality as the source. You might also try -qmin 1, -qmax 15 or something similar. Finally, you may wish to use two pass video encoding. see: -pass at – Tyler Mar 25 '10 at 0:46

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