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List:       ms-wmtalk
Subject:    Re: Which JPEG codec for AVI?
From:       Douglas Ferguson <dferguson () PICKSAT ! COM>
Date:       2001-07-31 13:33:35
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While I didn't try going QT - AVI, I did get some good quality out of
Pegasus' stuff (www.jpg.com). Your quality (obviously) is only going to be
as good as your source, so if you can get MPEG-2 versions of your footage at
4+ Mbps (full-size stuff @ 640x480 and up), you can use free stuff like
Flask to convert to an MJPEG AVI that WM Encoder 7.1 can use. I have yet to
transcode a 2-hour video to MJPEG, but my 60-70-second samples are a little
shy of 300MB (about 4.5MB/Sec, counting the 1.5Mbps uncompressed WAV track,
which leaves the video at 3MB/sec or 24Mbit/sec) which is well below the
data rate of Huffy.

-----Original Message-----
From: Jan Oosterhuis [mailto:J.Oosterhuis@EDTE.UTWENTE.NL]
Sent: Monday, July 30, 2001 3:04 PM
To: WMTalk@DISCUSS.MICROSOFT.COM
Subject: Re: Which JPEG codec for AVI?


Ben,

I am glad to be able to provide you with some information.
This is web page I made a little time ago, so maybe it's not
completely up-to-date.
http://users.edte.utwente.nl/oosterhuis/mjpeg.html.
(Most of these codecs can do JPEG and M-JPEG.)

Hth

>Jan,
>
>     Do you have links for either of those codecs?
>
>
>Ben Waggoner
>Interframe Media <http://www.interframemedia.com>
>Digital Video Compression Consulting, Training, and Encoding
>
>Check out my Stanford compression classes:
><http://newmedia.stanford.edu/courses_video.html>
>
>
>
>on 7/30/01 5:04 AM, Jan Oosterhuis at J.Oosterhuis@EDTE.UTWENTE.NL wrote:
>
>>  All of our source video is captured in QuickTime format, using Media
>>  100 on Apple Macintosh.
>>  Windows Media Encoder is not able to handle these QuickTime clips, so
>>  I have to create an 'intermediate' AVI-clip first.
>>  I prefer to use the 'none' compression for the AVI (or HuffYUV), but
>>  with the longer clips this would take too much space. So in those
>>  cases my only solution is to use JPEG compression.
>>  I have done some testing with the Morgan and PicVideo codecs, and I
>>  was wondering which codec I should use. What is your opinion on JPEG
>>  codecs for AVI?
>
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--
Jan Oosterhuis
Faculty of Educational Science and Technology
University of Twente, Enschede, The Netherlands
e-mail: J.Oosterhuis@edte.utwente.nl

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