Compression issues

This forum is for questions and discussion of all the aspects of handling your footage. If you have questions about capturing/ripping footage, AviSynth, or compression/encoding/converting, look here.

Compression issues

Postby tyromaniac » Mon Apr 16, 2007 5:28 pm

Ok, let me start off by showing you a picture of my virtual dub progress thing
I see that the video kb/s seems to be at least twice, if not more than that of what it should be(as in the avtech guide). My Huffy for a 10 seconds clip totals 113,897 mb. (That has the uncompressed audio included) This is the 1st pass that I am about to show you (divx / xvid ) at full quality non discarded. Any ideas what could be wrong or what beginners commonly do wrong? (its cut off....sorry about that, but the video data rate is over 1mb per second which is really bad.
Image
User avatar
tyromaniac
 
Joined: 18 Jul 2005
Location: Manasquan, New Jersey

Postby CrackTheSky » Mon Apr 16, 2007 7:40 pm

Err...what's the uncompressed audio doing in thar? If you're trying to make a distributable copy, you should mux your video with MP3, not .wav.

Unless I'm misunderstanding you...
User avatar
CrackTheSky
 
Joined: 27 Aug 2006
Location: Chicago
Status: Probably not editing.

Postby tyromaniac » Mon Apr 16, 2007 9:26 pm

That is beside the point, i just want you to focus on the video stream. The audio I know how to compress, so that is not the problem. The only problem I have is figuring out why the video is so large (I did mention that it was only a 10 second clip)
User avatar
tyromaniac
 
Joined: 18 Jul 2005
Location: Manasquan, New Jersey

Postby JaddziaDax » Mon Apr 16, 2007 9:49 pm

uh... did you try a SECOND pass?
User avatar
JaddziaDax
Crazy Cat Lady!
 
Joined: 16 Mar 2004
Location: somewhere i think O.o
Status: I has a TRU Arceus

Postby tyromaniac » Mon Apr 16, 2007 9:52 pm

sure did, but that only eliminated about a megabyte. This is only a 10 second clip that totals over 10 mb. So a 2 minute song is over 120 mb, and my song is over 3.....so I either have some source footage problem, or some compression problem.
User avatar
tyromaniac
 
Joined: 18 Jul 2005
Location: Manasquan, New Jersey

Postby JaddziaDax » Mon Apr 16, 2007 10:01 pm

set the target file size lower on the second pass?

did you add alot of grain to your video?
User avatar
JaddziaDax
Crazy Cat Lady!
 
Joined: 16 Mar 2004
Location: somewhere i think O.o
Status: I has a TRU Arceus

Postby tyromaniac » Mon Apr 16, 2007 10:13 pm

OH SNAP THAT'S IT ( please tell me that the stupid noise effect {adobe premiere} adds alot of bits!) Thats probably it considering at least 5 of the 10 seconds is that noise effect.....THANK YOU
User avatar
tyromaniac
 
Joined: 18 Jul 2005
Location: Manasquan, New Jersey

Postby JaddziaDax » Tue Apr 17, 2007 6:49 am

i think noise effect will do it...
i had that issue with one of my husband's videos (im still trying to figure out how to compress it properly)
User avatar
JaddziaDax
Crazy Cat Lady!
 
Joined: 16 Mar 2004
Location: somewhere i think O.o
Status: I has a TRU Arceus

Postby BauziOLD » Tue Apr 17, 2007 7:20 am

tyromaniac wrote:OH SNAP THAT'S IT ( please tell me that the stupid noise effect {adobe premiere} adds alot of bits!) Thats probably it considering at least 5 of the 10 seconds is that noise effect.....THANK YOU


Noise and Malfunction (additional effect from DigiEffects) are pure bitrate killers. The more details are, the more bitrate you need. I had a 10 seconds clip that had 30MB because of malfunction.
Look at Decoy´s Bleach Technique Beat. It´s the same there.

MPEG-4 codecs (or just say: alot. I can´t say if all do it) work better with wonderful color areas. That´s why it is so important to clean up your DVDs or footage from noise.

You could try to use a constant bitrate or take x264 for the encode:
http://www.animemusicvideos.org/guides/ ... 64gui.html
I recommend x264. I have a part with really heavy noise for a long time. It doesn´t look ugly with a lower quantizer (as said: my experience). Best way to find out wich is best, is to try more enocdes and to compare them together.
ImageImageImage
Image
User avatar
BauziOLD
 
Joined: 17 Oct 2006
Location: Austria (uhm the other country without kangaroos^^)

Postby tyromaniac » Tue Apr 17, 2007 3:43 pm

The noise isn't needed for the effect, so I will just remove it all. But I'm glad it was a simple fix....I was almost on the verge of starting over O.o and deleting all of my source footage. I'll check up and tell you if the noise was the problem in a few minutes. Thanks everybody
User avatar
tyromaniac
 
Joined: 18 Jul 2005
Location: Manasquan, New Jersey

Postby tyromaniac » Tue Apr 17, 2007 4:39 pm

Ok, i had to restart my computer because my sound card was screwy......and now when i exported the huffy, it was 79 mb (this is with the 30 mb audio O.O too!!!) so they would have been the same file size (both the original crappy huffy and this new one). But the real shocker was that I had used that film effect for the majority of that 10 seconds!!! So when I used the xvid 1st pass, it now only totaled 3 mb(keep in mind with uncompressed audio (i will compress later!))and and average bit rate of 1867 kbps compared to that 10000 kbps or so earlier.

So, when you want to use that stupid noise film effect for whatever reason, do not use it. Thank you everyone! I hope others will learn from my mistake.....as silly as it was
User avatar
tyromaniac
 
Joined: 18 Jul 2005
Location: Manasquan, New Jersey

Postby Zero1 » Wed Apr 18, 2007 3:56 pm

Not all video requires the same amount of data to encode. While the first X amount of seconds might be fucking huge, the rest of the video may well be easy to compress, and offset the huge bit rate spending at the beginning.
User avatar
Zero1
 
Joined: 02 Jan 2004
Location: Sheffield, United Kingdom

Postby tyromaniac » Wed Apr 18, 2007 6:15 pm

Zero1 wrote:Not all video requires the same amount of data to encode. While the first X amount of seconds might be fucking huge, the rest of the video may well be easy to compress, and offset the huge bit rate spending at the beginning.

True, but as I said earlier, it probably isn't worth it. I would be better off using a different effect plugin.....then that crappy one. But if I did, playback may also become a problem as the video would start out with a huge bitrate and then mellow out. (My computer is horrible by the way...)
User avatar
tyromaniac
 
Joined: 18 Jul 2005
Location: Manasquan, New Jersey


Return to Footage Help

Who is online

Users browsing this forum: No registered users and 0 guests

cron