A few videos in one single container

BauziOLD · Post by **BauziOLD** » Sun Mar 11, 2007 7:02 pm

Heho

So I make an amv now that is setted up in parts. Some parts have heavy grain etc. so compress it into a worthy filesize is pretty hard. Sometimes I want for this part a better quality for others not (uhm... hey sometimes it looks good ^_^').

What I want is this now:
-A few videos placed into one single container. This is no problem with .mkv right? But I want them also to play them like one single amvs. With no breaks or something like that.

Uhm... I would preffer the mp4 container if this is possible.

Rapture** · Post by Rapture** » Sun Mar 11, 2007 7:10 pm

.mkv , or .ogm i think that would be best (i don't know of any other ways though).

Rapture** · Post by Rapture** » Sun Mar 11, 2007 7:12 pm

i don't know about mp4,but i heard that mp4 have that function too.

YouTube · Post by **Kionon** » Sun Mar 11, 2007 8:24 pm

Okay, I'm confused. You want them to play one right after the other, or do you want them to represent different streams in a single file?

BauziOLD · Post by **BauziOLD** » Mon Mar 12, 2007 5:39 am

Kionon wrote:Okay, I'm confused. You want them to play one right after the other, or do you want them to represent different streams in a single file?

Exactly they should play without any breaks between the parts.

Rapture** · Post by Rapture** » Mon Mar 12, 2007 5:43 am

then .mkv , it supports multi-part videos,and sound.

BauziOLD · Post by **BauziOLD** » Mon Mar 12, 2007 5:47 am

Ok I hope Mkvtoolnix is enough. Thx

CrackTheSky · Post by **CrackTheSky** » Mon Mar 12, 2007 2:20 pm

Bauzi wrote:
Kionon wrote:Okay, I'm confused. You want them to play one right after the other, or do you want them to represent different streams in a single file?
Exactly they should play without any breaks between the parts.

If I understand you correctly, couldn't you just export each separate video losslessly individually, and then import them into your editing program and line them up, and then export THAT (the ENTIRE video, without any breaks) losslessly and compress it like normal in VDub or whatever?

BauziOLD · Post by **BauziOLD** » Mon Mar 12, 2007 4:08 pm

CrackTheSky wrote:
Bauzi wrote:
Kionon wrote:Okay, I'm confused. You want them to play one right after the other, or do you want them to represent different streams in a single file?
Exactly they should play without any breaks between the parts.
If I understand you correctly, couldn't you just export each separate video losslessly individually, and then import them into your editing program and line them up, and then export THAT (the ENTIRE video, without any breaks) losslessly and compress it like normal in VDub or whatever?

No. I have places (you know already one of my betas). There is one part that needs more than 10000 kbps in XviD for over 50 seconds. That make 112MB. This and a few other things would mess the --crf encode of mp4 completly up.

I would need a --crf rate of 23 or a --bitrate of 2000 for a acceptable filesize for this segment.

The other parts would just suffer under the low parameter and that is the big problem.

Look at this two screenshots:

The first one is with --bitrate 2000. A bit fuzzy but it does look good when everything is moved:
http://img504.imageshack.us/img504/5079/01dq5.png

The second one is in looseless:
http://img59.imageshack.us/img59/1562/02sa0.png

This is the pure boochsack horror clip ^^ The poor flash file would simply "break".

Zero1 · Post by **Zero1** » Mon Mar 12, 2007 7:10 pm

I suggest joining all the sections together as previously suggested and encoding them in one run. Doing it as a single video is more optimal than lots of little bits because the codec can pick and choose more carefully, and also it gives ratecontrol more to work with. If you are struggling with some areas, use zones in x264, it's not ideal, but it's a lot better than encoding parts and storing them in a non standard container IMHO.

Basically what you are doing is taking a jpg that needs 600KB and trying to get it to 100KB and it's not working. Not being happy with the result you cut the image up into parts and save them at different qualities to reach 100KB, it may look better in parts, but it's inconsistant.

If for some reason you were encoding parts so people could skip to them, well in MP4 you can encode a single stream and just make a chapter file.

Also, I know I sound like a broken record, but you really need to forget bitrate and filesizes so much if you are hell bent on reaching a certain quality. No matter how hard you try, some videos just have to be larger than you would have liked. Sometimes it's like trying to fit an elephant into a mini cooper. It just won't happen without getting ugly or losing something. My final advice on the matter would be that sometimes you can over analyze things, especially with AMVs where you aren't talking about huge filesizes to begin with. Personally I would really stick between QP18-20 or CRF 18-20 with maxed out settings (as my previous post) and just live with it. Anything beyond CRF20 will start to get ugly, and if you still can't reach your target at CRF20, then so be it; the video simply requires that filesize for a good, consistant quality.

I hate to sound pushy, but really I think you are spending more time on this than practicable for megabytes, I'm just trying to save you time here

Of course it's great that you are willing to try these things and experiment, so I shouldn't discourage you at the same time.

Nice vid by the way