Avi to Quicktime MPEG4 - Using Adobe Media Encoder

[copiapoa]

http://forum.matrox.com/rtx100/viewtopic.php?t=8407 (See this also)

I'm trying to convert a 45 second avi movie to Quicktime Mpeg4 compression.

Using Adobe Media Encoder the QuickTime format produces files that are three times larger than would be predicted by the data rate I select. (bitrate appears to be incorrect?)

bitrate: 91.36 (produces a file size of 33.3MB)



If the bitrate is reduced from 91.36 the quality of the video drops below what I want. From what I understand the file should be much smaller in size.

How do I make the file smaller, downloadable using QT without adding streaming capabilities.

avi movie info:
720x576 pal
frame rate 25
pixel aspect ratio 1.067

Using adobe Premiere pro 1.5

apple mpeg4 compressor
spatial quality: 90
frame rate 25
pixel aspect ratio dv/dv pal (1.067)
frame width 720
frame height 576
bitrate: 91.36 (produces a file size of 33.3MB)
field order none (progressive)

Is there a trascode setting quide for quicktime on the net some where?

http://forum.matrox.com/rtx100/viewtopic.php?t=8407

Jon

[Cornucopia]

Well, the obvious answer that comes to mind for me is that of wrong nomenclature.

IOW, when you select bitrate in WM or AVI compressor, etc. it expects kbps, but for QT it expects kBps. And yes, I have also found that the quality of the MPEG4 encoding via QT is much worse than that of other methods--even using stock bitrate/quantising/motionsearch settings on SP@ML material.

I've resorted to using other compressors (ffmpeg/ffdshow, 3ivX, etc) and creating a (backward)QT-compatible (aka Simple Profile--NOT--Advanced Simple Profile) MPEG4 stream, and then later imported that into QT to give it full ".MOV" file structure (not just the basic MP4 structure--unless that's what you needed). Same thing could be done for Audio with AAC LC (QT compatible) vs. AAC HE (better, but not compatible).

HTH,
Scott