I have been exporting QT ref files for years on my old XpressPro in WinXP, then converting in ProCoder 2. No Problems. Now I have MC, the reference files are tearing on horizontal moving text. They’re the same programmes that were exported before, now been updated. I’ve even tried re inputting the text. Still no joy.

I guess this is a function of de interlacing – but whatever I adjust in AVID or procoder, makes no difference. Even exporting straight off the timeline Full res doesn’t seem to have an effect (although H264 seemed better – but lower quality)

I assume that MC installed it’s own new codecs – Are Codecs the issue, or something I missed?

Many thanks

Hi All

I notice no-one’s posted to this query – so I deduce either I’m being so thick, as to negate a response, or no-one else has had this problem.

Just to clarify: I have now created a straight forward test white out-of-black caption that moves horizontally across the screen. Looks fine in AVID.

When I export as a ref file or in QT movie – it becomes jagged. Unless I export as a movie in “single field”, which is 6 times the size of a standard movie.

I have tried every permutation of file encoding that I can think of & encoded as non interlaced on ProCoder – all to no effect.

It used to work OK on Xpress Pro last week….

Any clues?

I can think of no reason that the export would be different between AXP and MC, unless you are using different settings.

What you describe sounds like interlacing artifacts. Whether you need or want to deinterlace will be determined by the destination. If you are eventually creating an interlaced DVD, there would be no need to deinterlace.

When you watch a QT ref that refers to interlaced media you will indeed see horizontal artifacts, since the QT player will display both fields at the same time to your (progressively scanning) computer monitor.

So wherein lies your problem? Is it the fact that you see interlacing artifacts on your QT Ref, or is the DVD you are creating not OK (for instance, does it have a reversed field order)?

The "single field" export simply means that you don't end up with a QT Ref, but with a self-containing QT movie, and it will eliminate half of the vertical resolution.

From what revision of AXP did you upgrade to what revision of MC?

Thank you for replying Job

I'm sure your right about interlacing but previous AXP was 5.8

I took your advice & re ecoded the Master full res QT back into the system to see if the artifacts still remained, & they do, although manifest themselves slightly differently - which was very dispointing.

I'm trying to send someone a 30" trailer electronically - so they can import into their system (don't know if AVID or not) & then it plays back just like I saw it on my system.

Any other tips?

Many thanks in advance

 Latest update - this feels like a diary (!)

Taken same QT refs & encoded via the Sorenson Squeeze that came with MC & it works very nice (altered HD settings into Std def) - so it MUST be something to do with updated codecs.

I notice another codec query on the forums - perhaps some light will be shed over the next month or two

Many thanks

I'm trying to send someone a 30" trailer electronically

Then your best option would be to export in Same As Source, that is: as long as the receiving party has access to the Avid codecs. That way, there'll be as few conversions as possible.

You don't mention the Avid resolution you were working in, but same as source will not alter that (although it will force all effects to be rendered).

Hi Job

Thanks for that - I did try "Same as source" & the full res QTs made that way - but then even as a test, when I re encoded them back into my machine, they still looked terrible! - I rather thought that same out would be same back - but no

Resolution = DV25 420MXF. All effects rendered before they are exported.

I recall there was a field order issue with DV25 PAL resolutions.

 as far as I know that field order problem was solved a few versions ago. When coding is ok in Squeeze that might come from the fact that Squeeze (version?) standard sets a deinterlace filter active.

Check if field order is lower field first.

 May I add that Procoder 2 is not the latest Quicktime versions compatible, you'll need to upgrade to Procoder 3.

Thanks for that

I’ve been checking out many other entries in these forums about tearing & field dominance. Many seem to manifest themselves at the MPEG2 point of encode.

My project is DV25 & I re created all the captions as 420MXF. Some of the source material comes from various DVDs/VOBs, which I’ve converted via Procoder2 into AVID compatible QT’s & then imported into the timeline.

Thinking that this might have something to do the a mismatch of video, although, it is only horizontal moving text that creates the problem, I transcoded the video into a) DV50 for a test & b) into 1:1 for a test – still to no improvement. I had assumed that a combination of one of AVID’s internal encoders creating Full Res QT’s might do the job

Incidentally, I ran loads of tests on a 10’’ horizontal moving caption, white out of black & tried many combinations too – all to no effect

Eaakkkk.