still getting 'garbage' Lagarith encoded frames

Org Profile · Post by **808-buma** » Fri Apr 06, 2007 7:37 pm

Hey again all - alrighty - I still don't get it..

For one of my sources, I did a vid capture of the above dancing girl and saved it as a Lagarith YV12 [version 1.3.12] encoded AVI file at 25fps. I imported it into my editor (Magix MEP10) which was set to 29.97 fps (wonders if this might be the problem...) and when I original exported the final video everything was fine and dandy.

However, when I went back to change some items in the video (I don't believe that I changed this part of the vid at all in the last edit), and re-exported it again, I got this 'garbage' over my video above. There were no other types of changes made in the video or the source, so I don't know why this would suddenly appear in the videos.

I normally edit video on 2 computers using a USB hard drive: a P4 3.2 w/1 gig of ram and an AMD 4200X2 dual core at home with 2 gigs of ram. I've been getting this type of error off and on for quite a while now (since I did my Threshold vid last year in April of '06) so I've been using Huffyuv more and more now.

So, just as a wild guess - is it the YV12 colorspace? Is it the different fps between source and output? Phase of the moon? anyone know? This is getting fustrating...

any and all input appreciated

Phantasmagoriat · Post by **Phantasmagoriat** » Fri Apr 06, 2007 8:13 pm

Do you mean just at a couple frames?... cause that's been happening to me, and I've just been masking over those couple frames in vdub. [and compressing again :\ ]

but yeah, it is really annoying... and I don't get it either.

Org Profile · Post by **808-buma** » Fri Apr 06, 2007 8:24 pm

yes, it happens only for a few frames (usually 2 at most). I've either re-encoded the offending clip has a huffy or I edit it out in my editor and stretch the surrounding clip to meet in the middle but want to solve the problem so I don't have to do it anymore.

anyone with any ideas?

Willen · Post by **Willen** » Sat Apr 07, 2007 6:17 am

I've had this happen to me. Same project (no changes), opened on an AMD Athlon64 X2 desktop (this machine) and an Intel Pentium M Centrino notebook, using Magix MEP 10, the garbage frame(s) appear, and in different places (clips), on each computer. It may be due to the clips being in YV12 colorspace and Magix may be using RGB for internal processing, causing the problem due to internal conversions. BUT, I've used ffdshow's Huffyuv YV12 codec and I've not seen the same issue come up. And I've never seen this problem with VOBs (MPEG-2, YV12) opened directly with Magix. It may mean it's a problem specific to Lagarith.

If I ever finish the videos I'm working on, I may dig into this issue a bit further.

Org Profile · Post by **808-buma** » Sun Apr 08, 2007 1:10 pm

I don't think that this is limited to Magix MEP either, as I've asked JubJub2 if she's encountered this as well and she had... and I think she uses premiere.

and Willen, hopefully you will figure this out as I surely don't know where to begin!

Org Profile · Post by **808-buma** » Wed Apr 11, 2007 3:45 am

Lagarith Change log wrote: Version 1.3.11 released on 11-12-2006
...
<strike>Fixed</strike> Reduced the severity of a bug that would cause frames to occasionally decode incorrectly when multithreading was enabled.
Changed how Reduced Resolution handles frame edges, this fixes chroma garbage that would show up on the top or bottom of Reduced Resolution frames. Thanks to Andrew Harrison for reporting this.

could this be it? I'm on a dual core... and I may have encoded some of mine with V1.3.11...

anyone else?

Willen · Post by **Willen** » Wed Apr 11, 2007 6:27 am

I'll do some quick testing today.

reddragon_syndicate · Post by **reddragon_syndicate** » Wed Apr 11, 2007 12:58 pm

Same here with the frames business.. So I tried changing my scripts and changing it to a huffy file. while Premiere Pro is most likely my problem.. I never had it before I started using 2.0 (the latter was 1.0).

reddragon_syndicate · Post by **reddragon_syndicate** » Wed Apr 11, 2007 12:59 pm

*sorry for double post

The experiment with huffy didnt work either.

Scintilla · Post by **Scintilla** » Wed Apr 11, 2007 5:04 pm

reddragon_syndicate: Since you're using Premiere Pro, are you making sure that "Recompress" is checked and set to "Always" in your export options?