Hi All,

I am running Chrome Xe with the following specs:
Avid Liquid Chrome Xe build 7.2.0.4345
HP XW8200
Xeon 3.2Ghz
2GB Ram
NVidia Quadro FX1500 with latest drivers

For some strange reason I am getting almost what I'd call compression loss when I render something before creating DVD/Exporting to file/etc. Playback of some items before I tick the 'render yellow slices'box look fine on my line monitor but upon rendering, frames before, during and after the effect or transition turn ugly.

No apparent consistency either - will create bad frames in different spots when I delete render files and start again.

Any ideas? Have tried swapping elements to different layers, rendering in uncompressed, doing the transparent white/black clip above & below layers, etc. All to no avail.

Cheers,
Michael

P.S. Video captured from Digital Betacam using SDI to I-MPEG2 50 Mbit.

 

I know nothing about Chrome but it should be the same software as Pro, have you tried the DX 10 patch?

Edited

Excuse me 4345 is the Dx 10 patch, then comes another question, did it work before you installed the patch ?

Bumping last thread, will delete this one later

Yes .. knew I forgot to mention something. My trusty tech/sales guy put me on to the patch but that didn't appear to solve the issue either.

 

Tomorrow I'm going to attempt to capture from DVCPro 50 using SDI and go through a number of codecs and see if that helps. The work around was to play out what I could real time to a DVCPro 50 machine and then capture that back in uncompressed. Two passes and the job was done (thankfully only going to DVD) but a hell of a time consuming work around.

 

Got me (and the tech) buggered!

 

Thanks for your help though. :)

 

 

 

Good advice from your tech, would have been the first thing that I should have tried.

I suppose that you are so familiar with the program so that you haven´t changed any FX render options or quality rank settings and are using all the default ones.

Also, for how long have you used your Quadro card and has it worked well in the past.

 

This is a very odd problem.  Everything you are using is up to the full specs for Chrome.  I'm a bit stumped at this point.

Has everything worked in the past?  If so what do you think has changed with your system since you noticed the problem?  Did you install any software recently or a hardware device maybe?

Are any of these glitches with gpu, cpu, classic effects or with any type of effect?

any chance you could post a jpg of the ugly result? I have some wierd problems once that might be simular, I changed the order of the effects in the FX Properties, had to do with CC on effected clips in my case. FWIW.

Thanks for all your interest guys ... will add as much as I can in response and then somehow figure out how to post an image of the fault.Oddly - it's not so obvious on the computer monitors but sticks out like 'dogs balls' (sorry .. Aussie saying) when on the line monitor (mind you, the line monitor is a JVC HD/SD hi res so I guess that's exaserbating the issue).

 

System has worked fine until this current job .. have since tried another sequence and just applied similar effects/animated super bar/text/etc over DV AVI vision with the same result.

I'm thinking of goingback to basics and perhaps re-seating the graphics card, cleaning out the system as best as I can (still have about 8 projects in motion) and then seeing if I can replicate the fault. I'll note down as much as I can along the way and see if it sparks a light with one of you guys. (I live in hope).

 

Oh, and have tried rendering to another drive, the same drive, external drives, fusing, etc .. anything that prompts that 'Complete Render' function results in corrupt frames (but not always the SAME frames). 

 

Thanks again for your interest. 

 

 * occurs with either ... CPU/GPU/etc .. seen it dissolves, during supers, with wipes, effects, etc.

And no new hardware or software has been installed that I can think of at all.  Quadro card been in the system since January-ish I think.

Have created a flash video file showing the problem if anyone can assist on how I can upload it here?

Luminous:

Hi All,

I am running Chrome Xe with the following specs:
Avid Liquid Chrome Xe build 7.2.0.4345
HP XW8200
Xeon 3.2Ghz
2GB Ram
NVidia Quadro FX1500 with latest drivers

For some strange reason I am getting almost what I'd call compression loss when I render something before creating DVD/Exporting to file/etc. Playback of some items before I tick the 'render yellow slices'box look fine on my line monitor but upon rendering, frames before, during and after the effect or transition turn ugly.

No apparent consistency either - will create bad frames in different spots when I delete render files and start again.

Any ideas? Have tried swapping elements to different layers, rendering in uncompressed, doing the transparent white/black clip above & below layers, etc. All to no avail.

Cheers,
Michael

P.S. Video captured from Digital Betacam using SDI to I-MPEG2 50 Mbit.

 

No one has asked what OS you're using, so I'll ask.  What OS are you using?  The DX10 service pack is supposed to be installed on XP SP3.  It may not work correctly on XP SP2 or Vista for you even though it might for others due to system differences.

That is not a DX10 card, so the DX10 service pack might be hurting rather than helping anyway.

Using the latest drivers might also be hurting rather than helping.  Try older drivers.

Sometimes effect rendering isn't too good with MPEG material.  You might need to change your render/fuse codec to uncompressed to avoid the artifacts.  Or, use the same render codec (in timeline properties, even if you have to create a custom render codec) that you used for capture to avoid that problem.

Hey Scott,

 

Another thing I forgot to mention (sorry) - XP Pro SP3 and yes, know that the patch is for DX10 but gathered nothing else was working so I didn't think I had too much to lose.

 

Will see what happens if I re-seat the card. Any idea how to attach a file to these posts?

 

Cheers,

Michael

 

 

 

Michael,

You can't attach a Flash file or any other video file to a post as far as I know.  Can you upload it somewhere and then just post a link?  That would surely work.  Places like YouTube, Vimeo and others like that might work well enough to see the problem but they might also add more artifacts.  If you have some personal web space to use, that would be best so there's no further compression.

To attach a file to a post, click on the Options tab when you're editing the post.  Click Add/update and click Browse to browse for the file, then click the Save button to finish the process. 

Using the same render codec as your capture codec or using uncompressed for the render codec might be the solution.  I'm guessing you're seeing blocking, pixelation or other compression artifacts during effects or transitions.

 

---- Later ----

I wasn't thinking or I would have suggested you just take a screenshot or export an image file from Liquid and attach the still image.  Set Liquid to show both fields so the problem can be seen better.  Image files can be attached to posts.  Various image formats are supported for attachments but JPG is probably the best choice.  For future use, text files and, I think, PDF files can also be attached.

Luminous:

it's not so obvious on the computer monitors but sticks out like 'dogs balls' (sorry .. Aussie saying) when on the line monitor (mind you, the line monitor is a JVC HD/SD hi res so I guess that's exaserbating the issue).

Michael,

Are your Liquid inlays set for both fields or just even or odd?  Try setting the inlays for both fields and go to fullscreen preview.  See if the problem shows up there.  I'm wondering if your JVC monitor is doing some rescaling which is messing things up or if you're just not seeing it in Liquid because you're only looking at one field. 

Thanks again Scott .. will try and find a way to get a link up.

In the meantime, just tried capturing from DVCPro via SDI to uncompressed, using uncompressed for the render and added 1 x water mark (semi-transparent TGA file over the top, 1 x animated super (TGA sequence) and 1 x Title Deko Pro title on top and still with the same result. About to re-seat the cards and try again. Will keep you posted on progress (or lack thereof).

 

I just edited an earlier reply to mention that a screenshot could be attached here.  That's easiest.

Yup ... both fields shows it up on full screen preview. That solves that bit. :) Bloody computers. Ok, powering down to re-seat now.

 

JPEG attached .. can't really see the compression issue though I'm afraid.

Update ... re-seating will have to wait as will require some technically minded individual to help me remove the card. I'm likely to bugger it up properly.

 

Luminous:

JPEG attached .. can't really see the compression issue though I'm afraid.

I suppose you mean it's there but hard to see.  Or, is it not there in the screenshot?  Where would we look and and what does it look like?  What did you see on the Liquid viewer at that point on the timeline?

Was that image a Liquid snapshot, a Windows screenshot (using Print Screen), or a single-frame image export from Liquid?  Whichever you used, try one or both of the others and see if that makes a difference.  If one of the other methods shows it better, then attach an image made that way.

To make a single-frame image export, mark an in and out on the timeline at the same point - on a frame which shows the problem.  Go to File-Export to File-Image and check "between Mark in/out only" (otherwise you'll get an image file for every frame in the sequence).  Use the JPEG full size preset or make a custom preset to fit the video image size if it's not 720x480.  All the factory presets are 720x480.

To use Print Screen, press that key on the keyboard while the viewer is showing a bad frame.  Go into an image editing program (even Paint which is built into Windows) and copy the clipboard into a new image, then save it as a JPG.

The Liquid snapshot should come out at the same resolution your timeline is set for.
 

Luminous:

Update ... re-seating will have to wait as will require some technically minded individual to help me remove the card. I'm likely to bugger it up properly.

Reseating it shouldn't hurt if done correctly but I don't think that will solve your trouble if you haven't seen other video display problems.  A card that's not well-seated would rarely if ever show trouble in only one specific way like this.  I'd expect boot-up problems, random crashes or lockups, or random and various display problems in any program among other possibilities if it was a seating issue.  Try it, for sure, but I don't think that will fix the render problem.

Luminous:

Yup ... both fields shows it up on full screen preview. That solves that bit. :) Bloody computers. Ok, powering down to re-seat now.

Was that looking at the Liquid viewer in fullscreen mode?

If so, then try a Print Screen screenshot while in that mode to see if that image will demonstrate the problem to us. 

Thanks Scott .. ok, attached are two files (labelled according to how they were created). The artifacting is present in both images particularly in the blacks (like the shadow of the coat on the RHS of frame). Again, strangely ... no issue with the vision preceeding this frame and the vision has the aimated super, title & watermark. This frame is actually a frame AFTER the previous elements in the timeline. If I delete the render files and let it go again, I'll get issues elsewhere in the timeline.

Also .. as I step through the elements while they're rendering, all looks perfect. It's not till the render completes that the issue shows up.

 *Apologies for reducing the sizes .. trying to get this sorted while using workarounds as I go.

 

Actually .. this frame looks better (worse)

I see problems in the areas I marked.  This doesn't show up at all in your captured material, even if slightly?

In the past, at least as I recall, this sort of thing was corrected when using uncompressed as the render codec.  What happens if you capture with a different codec and try the same effects?

By the way, you can click on the link above the posts or directly on the image to see a full-size copy.
 

Spot on my friend ... and it's perfect incoming on the vision. Happens with DV/Digi/DVCPro/etc ..