Render file size

analogkid12 wrote on 5/21/2003, 10:18 PM

Was wondering why when you render 2 mpeg-2 dvd files (2.2 GB and 1.2 GB) as an avi the file is over 8gb! I realize that avi is uncompressed, can anyone suggest a way to render to a reasonable size file with vegas 4.0? I will be authoring with another program, but can not import .veg files to it (obviously!)

Thanks

Comments

John_Cline wrote on 5/22/2003, 2:25 AM

DV video isn't uncompressed, but it does take up about 212 meg/minute or about 13 gig/hour. If it were really completely uncompressed, NTSC video would eat up 31 meg/sec. (720 x 480 x 3 x 29.97 = 31,072,896 bytes per second. Of course, add an extra 192,000 bytes per second for the 48k 16bit stereo audio.) 8 gig just doesn't seem to be an unreasonable file size.

Also, while an AVI file can be uncompressed, that generally isn't the case. AVI files are usually compressed with a codec of some sort. An AVI file is just a "container" and it can hold video compressed with a variety of different codecs. It just so happens that Vegas' "native" format is DV, so it generates DV format .AVI files, but it could just as easily generate other "types" of AVI files like, for example, MJPEG (Motion JPEG) format (assuming you had an MJPEG codec installed on your machine.)

When you say you will be "authoring" in another program, that implies that you will be authoring a DVD in another program. Why can't you just use the existing MPEG2 files?

John