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avi File Compression

  • 04-08-2011 11:00pm
    #1
    n1mr0d
    Closed Accounts Posts: 11 ✭


    Is there any easy way to compress avi files to under 500mb? Theyre films and I assume have been compressed previously from dvd just wondering can they be further compressed and would it be easy or difficult to do and what software would you use?


Comments

  • #2
    chin_grin
    Closed Accounts Posts: 10,808 ✭✭✭✭chin_grin


    You can lower the audio and video bitrates but you're just going to lose quality.


  • #3
    n1mr0d
    Closed Accounts Posts: 11 ✭n1mr0d


    chin_grin wrote: »
    You can lower the audio and video bitrates but you're just going to lose quality.

    How would you do that? And which would have a more detrimental effect or would both be equally bad?


  • #4
    Voodu Child
    Closed Accounts Posts: 6,706 ✭✭✭Voodu Child


    Why are you trying to do it?

    Handbrake is popular with beginners. http://handbrake.fr/ Start with that, but if you really want to max the compression you'll have to graduate to something more advanced.

    Always use the best quality source, in this case use the original DVD if possible.

    Use H.264 video compression with a MP4 or MKV container. Punch in the size you want and make sure to use 2-pass encoding. Better H.264 settings (in the 'advanced' window) will give you better compression, but will take longer to encode.

    You'll want to use a low resolution to minimise artifacts, but that is a loss of quality in itself. You'll probably want to denoise it somewhat to reduce visual complexity, again a loss of quality in itself but it'll help with compression.

    Use AAC stereo audio, for something that small you'll probably want an audio bitrate of 80kbps or less.

    Overall it'll look and sound horrible, think of a low quality Youtube video. :pac: I really don't recommend what you are trying to do.


  • #5
    Hal Emmerich
    Closed Accounts Posts: 2,078 ✭✭✭Hal Emmerich


    here's a good thread.


  • #6
    Overheal
    Registered Users, Registered Users 2 Posts: 86,729 ✭✭✭✭Overheal


    Hal Emmerich wrote: »
    here's a good thread.
    'tis. But frankly I get annoyed at folks who choose 700MB as their sticking point. I have no problems having a file thats 2GB big if the quality is acceptable. And I like things in 720. They look nice.


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