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MPEG 1 to divx
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Mac Elite
Join Date: Jul 2002
Location: Syracuse
Status:
Offline
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Hello,
I recently bought an Eye TV which produces MPEG 1 video. The high quality setting outputs at about 1.2 gigs an hour, which isn't very friendly to send. What is the best way to encode an MPEG 1 stream into a divx file? I'm new to all of this, so please be gentle... 
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Imac Core Duo 1.83/1.5 GB/20 inch cinema, ibook G4 1 ghz
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<Nap>
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Mpeg-1 in Quicktime presents a few problems. Foremost is that QT does not demultiplex the video and audio streams to separates tracks. Therefore, you will find that while you can transcode the video stream there will be no audio in the new file.
One solution, assuming you are running OS9 or OSX, is to use a freeware called BBDemux, which does demultiplex the streams. You should be able to find it via VersionTracker. Once you have the two streams in separate files, you will first need to use a sound utility to change the audio stream, probably labeled with a .m1a extension, to an AIFF file so that Quicktime will let you export it once you have it combined with the video stream. SoundApp, another freeware, should be able to do the conversion to AIFF.
Open the video stream, probably labeled with a .miv extension and also open the AIFF file you just converted. Put the time slider at the start of the video track, select all of the audio from the audio window and copy to the clipboard. Then go back to the video window and use "Add Scaled" from the file menu to add the audio to the video. Once you have done this you should be able to edit and then export the audio and video to a new file.
All this assumes you have a registered version of Quicktime, for you will not be able to export the video with the free version. Try the Sorenson codec instead of messing around with divx. Actuually, there is no divx encoder available to Mac users at present. Another good codec is the on2VP3 codec, available free at <a href="http://www.vp3.com." target="_blank">www.vp3.com.</a>
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Mac Elite
Join Date: Feb 2001
Location: adrift in a sea of decadent luxury and meaningless sex
Status:
Offline
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a few more things:
1. iTunes can compress your m1a file directly to mp3, but you first need to change the file extension to mp2 and strip the type and creator codes (bbDemux doesn't add type or creator codes in OS X at least, so you don't have to worry about them)
2. In QT 5 or higher, you won't be able to do any editing of movies containing mpeg-1 tracks, except the copy/paste you can do with selecting and dragging one picture onto another. But you can Export the video and audio tracks separately and combine them any way you like at the end, assuming you're not exporting back to mpeg-1
3. There are a few divx encoding options for Mac OS X using the open source ffmpeg code. Look on versiontracker for ffmpegX or mediapipe. Also 3ivx is comparable to divx in quality, but much more mac-friendly and you can export from QTpro with it
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blackmail is such an ugly word. I prefer extortion. the X makes it sound cool
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Forum Regular
Join Date: Dec 2001
Location: Paris, France
Status:
Offline
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try to use ffmpeg X (look for it on versiontracker), it does a lot of things and can easily convert files from several formats to others... there are a lot of options you can check and it could do the trick for you...

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late 2001 iBook (combo drive)
384MB, 20GB
OS X 10.2.4
Harman/Kardon SoundSticks
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