|
|
| twoguard |
| Posted: Oct 10 2002, 05:29 AM |
 |
|
Unregistered
|
i have downloaded episodes of the show 24. the ones which are encoded as mpeg are nearly 500 MB, so putting them on cds is impractical. the ones encoded as divx avi files are only 150 MB. when i tried to convert the mpg files to divx 5 codec files, the projected file size was over 600 MB. how do i compress the files into smaller divx files? |
|
| Kippesoep |
| Posted: Oct 10 2002, 10:42 AM |
|
|
Moderator of the Virtualdub support forum
Group: Moderators
Posts: 447
Member No.: 441
Joined: 6-October 02
|
Play with the DivX settings: lower the quality/bitrate settings. If the show lasts 1 hour, the bitrate to make it 150MB should be something like a mere 44kBps/360kbps, which doesn't even account for audio yet. That doesn't sound like anything near watchable quality, though. |
|
| twoguard |
| Posted: Oct 10 2002, 05:37 PM |
|
|
Unregistered
|
ok here's a little more informtion.. the clips are about 42 min in length each. the mpg video has an average data rate of 169.97 kb/s. its resolution is 352 X 240. the frame rate is 29.92 fps. the audio is 44100 Hz 16 bit stereo. The total file size is 431 MB. its pixel depth is 0.
the divx file has an average data rate of 52.07 KB/s. its resolution is also 352 X 240. frame rate = 29.97 fps. the audio is also 44100 Hz 16 bit stereo.
the avi details are: 1 video track and 1 audio track.
the video track is 99.27 MB, has 376 keyframes, 77872 delta frames and is compressed with the divx 5 codec
the audio is 29.83 MB and is formatted in mp3 with a compression ratio of -59.-88:1.
is it possible to convert the first file into a file similar to the second file? is vitualdub the program to do this and if so, how? |
|
| BaronVlad |
| Posted: Oct 10 2002, 07:02 PM |
|
|
Terrorhörnchen
Group: Moderators
Posts: 335
Member No.: 28
Joined: 12-July 02
|
maybe this topic will help:
http://virtualdub.everwicked.com/index.php...90910b328ca1a10
You can get a little bitrate calculator here:
http://www.doom9.de/extern_guides/CaptureG...eCalculator.xls
--------------------
Hochachtungsvoll
BaronVlad
Deutsch >> Capture FAQ - Capture Guide
Englisch >> Capture FAQ - Capture Guide |
|
| twoguard |
| Posted: Oct 10 2002, 09:53 PM |
|
|
Unregistered
|
ok ive figured some of this out... i had not set the audio to full processing mode so it was uncompressed. but, on my mp3 conversion menu, my top bitrate is 56kb/s at 22000 hz. one last question, would you think that 500 kb/s for video is sufficient oe should i go up to 700?
thanks
one more thing.. whats 1 pass and 2 pass mean? how do they affect file size/quality
|
|
| BaronVlad |
| Posted: Oct 10 2002, 10:06 PM |
|
|
Terrorhörnchen
Group: Moderators
Posts: 335
Member No.: 28
Joined: 12-July 02
|
>>ok ive figured some of this out... i had not set the audio to full processing mode so it was uncompressed. but, on my mp3 conversion menu, my top bitrate is 56kb/s at 22000 hz.
That is because you dont have the right mp3 codec installed, just look around a bit in the internet to find another mp3 codec (sorry, but for some reasons I cannot give you a better hint  )
>>one last question, would you think that 500 kb/s for video is sufficient oe should i go up to 700?
You should go up to 700 or even more to get good quality I think
>>one more thing.. whats 1 pass and 2 pass mean? how do they affect file size/quality
1pass: Only one encoding, choose one pass qualitybased if filesize doesnt matter and if you want to get best possible quality (quantizer 2)
2pass: Two encodings are done. You will get get a very good quality and you will get your desired final avi size, it should be the best choice for you.
--------------------
Hochachtungsvoll
BaronVlad
Deutsch >> Capture FAQ - Capture Guide
Englisch >> Capture FAQ - Capture Guide |
|
| fccHandler |
| Posted: Oct 10 2002, 10:20 PM |
|
|
Administrator n00b
Group: Moderators
Posts: 3961
Member No.: 280
Joined: 13-September 02
|
700k is certainly better than 500k, but the resulting file size is larger.
2-pass encoding gives the best possible quality with a constant bit rate, but it may take up to twice as long to encode and it's a bit tricky to use. There is little or no difference in file size between 1-pass and 2-pass.
There's a nice guide to 2-pass encoding with VirtualDub on the DivX site. (It claims to be for DivX 4.0, but most of it still applies to DivX 5.0.2.)
--------------------
May the FOURCC be with you... |
|
| twoguard |
| Posted: Oct 11 2002, 02:44 AM |
|
|
Unregistered
|
thanks a lot... i got it all figured out. my new task is putting them on cds that will play in a sega dreamcast.... but i guess that's another forum. thanks |
|
