I don't understand!

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This topic has 1 voice, contains 15 replies, and was last updated by Avatar of TakeAMiracle TakeAMiracle 4097 days ago.

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April 20, 2003 at 9:10 pm #1217
Avatar of unfoldingmetal
unfoldingmetal

This topic is mainly for Creel but anyone can post.

As I was watching Black Night, Creel’s movie. I noticed how large and clear the file was. And it was only 19 Megabytes. Creel, what capture program do you use?

Thanks.

April 20, 2003 at 10:13 pm #1223
Avatar of Cometgreen
Cometgreen

Well…it was only three minutes if I’m not mistaken. 16 mb is quite big for that, even at 640×480.

And your main question is with his compression, not his capture software.

Cometgreen

April 20, 2003 at 10:24 pm #1224
Avatar of Blunty
Blunty

Comet’s right – it is quite large considering it’s length…
comet’s wrong – it’s 720×480
comet’s right – it IS about compression, not the capture SW

two from three… not bad I suppose 8)

the movie is compressed using DivX, at a data rate of 84Kbbs at 29 frames per second (though this framerate is not neccisarily indicitive of the framerate that the film was animated at)

the audio is compressed using the Microsoft ADPCM at a bit rate of 354Kbps…. :o
THIS is why the file is so big… a massive datarate (compartively) using a audio codec that does not offer a particularly good compression ratio.

I only ever use MS ADPCM for my “archive” copy – the file I make my “distribution” copy from – and the file I keep safely tucked away – it’s BIG because I compress it very little, to preserve the quality as much as possible, without ending up with an unuseable multi Gig file.

April 20, 2003 at 10:52 pm #1225
Avatar of Cometgreen
Cometgreen

It’s 720×480? Odd. I thought he would change it to square pixels. That’s probably why you said it looked squished, Bluntman, the movie was most likely using rectangular (.9) pixels instead of square pixels. That can look a little screwed up on a comp.

Cometgreen, the pixel man

April 20, 2003 at 11:13 pm #1226
Avatar of TakeAMiracle
TakeAMiracle

I used the shareware Dodcap for much of the film, but I am also working on my own capture software. SMA would not work with my analog capture card.

The video was captured at 720×480 using my JVC analog video camera. That’s the size that my analog capture card does. I now have an Intel CS330 that I will be using. The camcorder is difficult to place due to its size.

It was animated at 15 fps, converted to 29 in Premiere bacause I also dump to tape and/or dvd. Compressed with Divx because I like the quality it gives with good compression.

I did not know that the ADPCM had a poor compression ratio. What audio compressor would you suggest? Sound is not really my thing. :(

BTW, my original file with no video or audio compression is 1,394,325 KB! Having seen some ridiculously large short films, I didn’t think 16 meg was so bad. I will experiment with different compressors to see what sizes I can get in the future.

April 21, 2003 at 12:37 am #1233
Avatar of unfoldingmetal
unfoldingmetal

BTW, my original file with no video or audio compression is 1,394,325 KB!

Thank you everyone. I will use your advice to try and upgrade my films. :)

April 21, 2003 at 12:50 am #1234
Avatar of Buxton
Buxton

For what it’s worth, I archived all the raw files for Out Of Time (dialog, video, foleys, etc) to ten CDs.

That’s a lot of disk space freed up.

April 21, 2003 at 12:56 am #1235
Avatar of TakeAMiracle
TakeAMiracle

“Buxton” wrote: For what it’s worth, I archived all the raw files for Out Of Time (dialog, video, foleys, etc) to ten CDs.

That’s a lot of disk space freed up.

To archive Black Knight, I zipped the uncompressed files and then saved to DVD.

April 21, 2003 at 1:45 am #1239
Avatar of Brian of Gep
Brian of Gep

“CreelUnderground” wrote: I did not know that the ADPCM had a poor compression ratio. What audio compressor would you suggest? Sound is not really my thing. :(

Personally, I use MP4…. It comes with DIVx.

April 21, 2003 at 2:08 am #1242
Avatar of unfoldingmetal
unfoldingmetal

Actually, You guys are really melting me.

April 21, 2003 at 2:49 am #1243
Avatar of Cometgreen
Cometgreen

Attack of the Clone: About 2 gigs of source files, 6 gigs of rendered sequences. Six gigabytes compressed down to 20 mb. Not too shabby if I do say so myself. Man, I need to put them on CDs.

The sound codec applies to your format. If you’re using Quicktime, IMA is usually preferred. If DivX, most likely MP4 as Brian stated. RealOne comes with its own, and is quite good.

Cometgreen

April 21, 2003 at 6:11 pm #1265
Avatar of unfoldingmetal
unfoldingmetal

Ok ok. How much space is there on your computer? There is only 6 gigs on ours. So… yeah, we need a new computer.

April 21, 2003 at 7:14 pm #1268
Avatar of Firelance
Firelance

Comet, you seem to use Digital Video I think; Considering the amount of disk space you use for a rather short film like AOTC… Or am I wrong?

April 21, 2003 at 7:30 pm #1275
Avatar of Cometgreen
Cometgreen

Well, it was shot with a VHS-C camcorder, but I used Videowave to capture, and it only captures stills at 320×240. But since the entire thing was bluescreened, there was a lot of 3d stuff made. In the end, the “rendered sequences” were six finished stages rendered with the Quicktime Animation codec*, and then put into one project. I watched the RM version last night, and I’m so disappointed at the compression. It really destroys the lightsabers and other certain effects.

*The Quicktime Animation codec is a lossless format, which means that it’s compressed video, but is as good as uncompressed video. The only problem is that it takes up huge amounts of space. There’s a new lossless Quicktime codec out that supposedly is as good but uses less disk space, but I forgot what it’s called.

Cometgreen

April 21, 2003 at 9:07 pm #1281
Avatar of Stefan
Stefan

Work is being done on lossless codecs for video and still images. Jpeg 2000, Motion Jpeg 2000 (part 3 of the Jpeg 2000 standard), PNG and MNG (the latter two are both finished products and in use in several programs).

These should provide ways of reducing the amount of disk space taken by your videos while retaining quality. For still images, though, 4:1 compression is already quite a lot. Don’t expect miracles!

Stefan.

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