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Edge -> RE: Compressing MPEG Files (10/15/2004 13:02:49)
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Thanks for all the help with this one[8|]. Well, I guess it doesn't matter now since I figured it out.
I had the solution to my problem on my computer the whole time. By using Windows Movie Maker, I was able to compress my original DVD camcorder video. Here’s how I did it.
1. Save the camcorder file (chapter) to your hard drive using the software that came with your particular camcorder. Mine saved as a MPEG file.
2. Open Windows Movie Maker.
3. Import the file by clicking on “File”, then “Import into Collections”.
4. At the bottom third of the screen, click on “Show Storyboard”.
5. Click and drag the imported clip down into the first frame of the storyboard.
6. Click on “File”, then “Save Movie File …”
7. Choose “My Computer” and click “Next”.
8. Enter the file name and location for the saved movie, then click “Next”. I would suggest something like “movie_name_1”. I also let the files store under “My Videos” since it is the default setting, and then move the file(s) into a new folder at a later time using Windows Explorer.
9. Choose “Best quality for playback on my computer (recommended)”, then click “Next”.
10. Click “Finish”. It will save the MPEG as a WAV file. The display size will be 720 x 576 pixels. Just by saving the original MPEG to WAV this one time, the file size was reduced from 37,000 KB to 9,715 KB! This example was for a 40 second video clip.
11. Now, delete the original MPEG file from the “Collections” that was imported.
12. Then, import the newly saved WAV file (i.e. “movie_name_1”).
13. Repeat steps 4-8, but rename the new file (i.e. “movie_name_2”). However, this time choose “Best fit to file size” or “Other settings”. If you choose best “Best fit to file size”, you can manually reduce the file size. As this occurs, you can view the reduction in the size of the file, as well as the display size at the bottom of the pop-up window. If you choose “Other settings”, there is a drop-down menu with (18) options, depending on the intended application, each with differing transfer rate and display size.
Here are some examples of smaller files I saved using the first WAV file:
a. “movie_name_2”: With “High Quality Video (small)”, the display size will reduce to 320 x 240 pixels @ 2,150 KB. Quality is very good.
b. “movie_name_3”: With “Video for Broadband (340 kbps)”, the display size will also reduce to 320 x 240 pixels, but the file size will only be 1,750 KB. Quality is still good.
c. “movie_name_4”: With “Video for Broadband (150 kbps)”, the display size will also reduce to 320 x 240 pixels, but the file size will only be 760 KB. Quality is fair, but definitely reduced.
d. “movie_name_5”: With a transfer rate of (48 kbps), the display size will only be 160 x 120 pixels and the file size only 260 KB, but the quality is really diminished at this level.
While you still have the imported file “movie_name_1” in “Collections”, repeat the “Save Movie File…” process several times; reducing each saved file as you repeat steps 4-8. That way you can have a half-dozen or so files of the same video clip to choose from. Perhaps you can offer choices for your users, depending on their internet connection speed and computer hardware/software configuration.
In the above example, I was able to take a huge camcorder file (33,000 KB – MPEG format) and reduce it down to around 2,000 KB (or smaller) – WAV format). I think the “High Quality Video (small)” would be a great choice for users with high-speed internet access. The quality is really good at this level. For a 52 kbps connection, probably offering the (150 kbps) would be the best compromise between a long download time, and yet still offer some video quality.
The Windows Movie Maker program can obviously do much more then just compress video files for use on your website. For a good source of information on Windows Movie Maker, check out “Microsoft Windows Movie Maker Tips, Tutorials, Forums and More …” at http://www.windowsmoviemakers.net/
Good luck with your video compressing adventures, Ed.
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