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I have a mov file with the size of 74 MB. because of the size it is getting slow to load in my webpages. i would like to reduce my video size. But if i do that by using online compressor the video quality become low. i am not bother about reducing the resolution and changing the video format. Can anyone please help for doing this more efficiently

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Could you not upload it to an on-line video service like Vimeo or Youtube? A full HD video on Vimeo easily takes up the space you mention and still people are able to watch it. If that's not an option then here's a link to a near duplicate question: avp.stackexchange.com/questions/2615/… –  Bart Arondson Aug 6 '13 at 13:10
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By nature, reducing the size of the video (either by bitrate, by resolution or both) will reduce the quality of the video. You can minimize the loss by using good compression algorithms from high quality sources with proper settings, but there will always be quality loss with additional compression, even if minimal.

Without knowing more about the type, length and resolution of your video, it isn't possible to give the best advice, but using 2 pass VBR H.264 video is a fairly standard compression algorithm to use. 2 pass VBR will adjust the rate of data use to help account for differences in complexity of the video and make better use of the data you allocate to it, but it is still necessary to allocate sufficient data rate or the quality will deteriorate.

If the video is HD, then it would have to be pretty short (under one minute) to stay under 74mb without pretty significant quality loss. Dropping the resolution will similarly greatly reduce the quality, though depending on the level of compression, it may be less blocky.

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