Rendering/Encoding Problem

[Mike of the Desert] · Post by **[Mike of the Desert]** » Thu Dec 13, 2007 5:51 pm

I have a really huge problem, and even if I tried in any way I know to solve it, in the end I truly need your help guys. Sadly, this time is something about Work, not hobbies or similiar.. ;\
So, it's even more urgent, uff.. Thanks for be here.

I'm editing a HD .Mov video (1440*1080), PAL 25 Fps.
The Audio.. I think it's irrilevant, since I can choose from Wav, Aif and Mp3.

The scary problem I have (and that I never had before) is that when rendering the Composition, the video is hugely pixelated, with a really poor quality and even Audio Problems sometimes if I try to render it to Avi.

I absolutely don't have idea Why this happens. I need to render it again into a HD Mov File.
I tried every setting I knew -> Nothing.

I even thought about a crazy test:
Converting the source to Lossless Avi for then rendering it again edited into the final Mov Video.
But.. This is where things get scary, VDMod doesn't accept it warning me about

''Cannot Detect File Type''

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I really need help here, anyone think about something?

[For Mods: Sorry if I posted this Thread into two different sections (Here, but I'm quite out of time and even if I really dislike to give more work to you guys, if you can decide which fits best this problem, you can delete the other one.

)

Qyot27 · Post by **Qyot27** » Thu Dec 13, 2007 7:25 pm

A) Although [kind of] irrelevant, is it supposed to be 4:3 or is there a flag set so it displays at 1920x1080? If that's the case, just make sure you compensate for that.

B) When encoding to lossless, is it Uncompressed RGB that you're using, or is it some other format?

C) A simple:

Code: Select all

FFmpegSource("video.mov")

should be able to solve it if the source is not some weird format. H.264 works, as attested by the trailers at the Quicktime site working with FFmpegSource. However, if this is coming from say, an AVCHD camera or something, then I'm not quite up on how well it works. Doesn't hurt to try, though.

It's available here:
http://forum.doom9.org/showthread.php?t=127037

(you'll need to put ffmpegsource.dll, .avsi, and .html in AviSynth's plugins directory - everything else goes into C:\WINDOWS)

Qyot27 · Post by **Qyot27** » Thu Dec 13, 2007 7:29 pm

Qyot27 wrote:However, if this is coming from say, an AVCHD camera or something, then I'm not quite up on how well it works. Doesn't hurt to try, though.

Not meaning to give the impression that AVCHD is somehow not H.264, because it still is, but the way the cameras store it might be wonky and cause problems that wouldn't appear otherwise.

[Mike of the Desert] · Post by **[Mike of the Desert]** » Thu Dec 13, 2007 8:31 pm

Thanks again for your great help.

Argh, I should vote you for most useful member this year!
Anyway.. I tried using that command but sadly when I play it.. It's like.. Dead.
After something like 5-10 minutes it works but it's awful. Green Blocks overlay everything and it's like burned, that command is sadly a complete failure.

The same goes for VDM that simply crash.

Now:

A) What do you exactly mean? I kind of hate when my incompetence with english give me problems like this one. ;\ Well, the video is 1440*1080 and it's 16:9, but I work on a 4:3 composition with artificial black bars. Anyway.. Try doesn't hurt, maybe should I try what you said? (Admitting that I didn't understand what exactly is)

B) I can't encode to lossless, because the error I posted before displays exactly when I drag the .Mov file into VDM.

Thanks again for the support, let's see if something happens..

I truly hope to come out of here with a solid solution. Or else I'm in trouble.

[Mike of the Desert] · Post by **[Mike of the Desert]** » Thu Dec 13, 2007 8:32 pm

Qyot27 wrote:an AVCHD

And.. It Could be. Not sure about that, but it could.

Qyot27 · Post by **Qyot27** » Thu Dec 13, 2007 9:47 pm

Ok, well, grab the installer for YAMB 1.6.0 (http://kurtnoise.free.fr/Yamb/installer/), and after installing, hop over to the 'Extract' tab and open up the MOV. Copy and paste the printout here - it should show what's going on with this file.

A) What do you exactly mean? I kind of hate when my incompetence with english give me problems like this one. ;\ Well, the video is 1440*1080 and it's 16:9, but I work on a 4:3 composition with artificial black bars. Anyway.. Try doesn't hurt, maybe should I try what you said? (Admitting that I didn't understand what exactly is)

As far as I know, 1440x1080 is not really a standard resolution for high-def video. The container may have an anamorphic flag so that, even though it's stored in 4:3 ratio (which makes it look distorted), when it plays back in a media player it gets stretched to the proper 16:9 ratio. But you said you were working with artificial black bars so I'm assuming whatever it is is already being handled correctly as far as playback size goes. Is it the editing program doing that adjustment or is that also how it appears when played in WMP or VLC?

It may be that you have to tell the editing program not to resize the footage to the right ratio, but to leave the footage as is.

I'm really not sure about a diagnosis of AVCHD, as those are supposedly created in TS files with a file structure compatible with Blu-ray players. But if it does happen to at least be H.264, then there could be some things about the stream which are problematic (although I'd wonder how frequently they'd arise - things like PAFF-type interlacing, for instance).

Willen · Post by **Willen** » Fri Dec 14, 2007 2:49 am

1440 x 1080 is a standard in the HD world, but not for HDTV. It is standard resolution for HDV format 1080i high definition (the other is 1280 x 720p). All high definition video should be 16:9 aspect ratio, so if in square pixels the resolution doesn't match with 16:9 AR, it's assumed to be anamorphic footage (rectangular pixels) and should be resized to 1920 x 1080 square pixels for playback.

Other formats that may use 1440 x 1080 are AVCHD and certain professional HD formats (http://ttop.com/hd_formats.html).

[Mike of the Desert] · Post by **[Mike of the Desert]** » Fri Dec 14, 2007 5:11 am

The software is Adobe After Effects 6.5 Pro.
And I never told the program about resizing it, the Aspect Ratio was always the same.

Thanks again to everyone for the great support and competence.

Well.. What can I say? I'll try to resize it to 1920 x 1080 and see what will happen.
I'm sure the Footage is from a professional HD Cam, directly exported from the Tape.

[Mike of the Desert] · Post by **[Mike of the Desert]** » Fri Dec 14, 2007 5:33 am

Edit button for God's Sake!

I'm rendering.
The problem is that the Director asked exactly for a 4:3 video.
That's why I used the artificial Black bars. But well, let's see what happens.

[Mike of the Desert] · Post by **[Mike of the Desert]** » Fri Dec 14, 2007 5:40 am

*Stretching to 1920*1080 the video is exported with the same quality as before (So heavy pixelation) but there is also some kind of deformation, since there are real black bars and above them mines.

I tried to export it to AVI, not Mov.
That's what happen:

The quality is HD, no problems about that unlike before, but the framerate is not normal.. It's like skipping some frames, like (Fuck my english

) when playing a super game with the not right hardware. Well.. Low Fps.

Any idea?