Berkeley CSUA MOTD:Entry 32476
Berkeley CSUA MOTD
 
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2024/11/23 [General] UID:1000 Activity:popular
11/23   

2004/7/26 [Computer/SW, Computer/SW/Apps/Media] UID:32476 Activity:very high
7/25    I got whole bunch WMV/MOV files.  In the past, I simply convert
        them into MPEG-1 format.  However, WMV/MOV has much higher compression
        ratio than MPEG-1, so, the file size tend to increase by 4 folds when
        I convert to MPEG-1.
        I would like to encode these propeitary formats to a royalty-free,
        patent-free MPEG4s.  Does such codec exists?
        \_ XviD?
           \_ sorry that I didn't make it clear.  XviD is the closest thing
              I've encountered so far, but XviD is essentially an AVI file,
              which means that it can not be streamed.  (MPEG-1 and even
              MPEG-2 has no such limitation).           --OP
              \_ that's because the index is at the end... you can have
                 xvid asf's that stream just fine.
        \_ 1. WMV and (Sorenson-compressed) MOV files, MPEG1, MPEG2, MPEG4 are
              all lossy.  They will be however big you want them to be.
           2. MPEG4 is not royalty nor patent-free.  Maybe you're thinking of
              Ogg Theora.
           3. XVID is not AVI.  AVI is a container; XVID is a codec.
           4. You care about streaming because...?  If you want streaming,
              leave them as WMV or MOV.  Or you can make standard MP4 files,
              but support for those is a bit more limited. (MP4 is basically
              the QuickTime MOV container anyway.) --jameslin
              \_ thanks, James.
2024/11/23 [General] UID:1000 Activity:popular
11/23   

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