[Raj Kumar]

Looks like this is a known problem now

https://community.avid.com/forums/p/94051/537428.aspx
https://forums.creativecow.net/thread/277/13839

There is a bug in how Davinci’s media pool sees the timecode. When I went in and manually corrected the start TC on the media pool clips using the Change Timecode menu item, the sequence successfully conformed and was relinkable back in AVID.

Hope this bug is fixed soon.

[Raj Kumar]

I can confirm this is happening with Resolve Lite 8.1.1 and Avid 5.5

I tried to do a roundtrip with just ONE clip in the avid timeline, and its very obvious that the Media Pool timecode is off for whatever reason. The offset is also NOT consistent, so using Add into Media Pool with offset doesn’t work.

Definite bug here, davinci folks.

From the above, this is happening with all different kinds of footage, but FWIW, mine is Canon 5D h.264 files with TC and Tape info added via QTchange.

My workaround right now is to try and load the AAF, note all the clips that didn’t load, manually load them from the MediaStorage into Davinci’s media pool, CHANGE EACH ONE’S TC to match what AVID tells me is the actual start TC. Once the media pool is populated with all the right clips, delete the session and master session and reload the AAF.

Finally, the sequence is conformed right. Now, caveat, I did a roundtrip with ONE clip but haven’t yet with multiple clips in the sequence, so bringing this back into AVID may still fail due to the TC change in the Media Pool I made manually.

PLEASE FIX THIS BUG! Or if its a process change we have to make, do let us know.

Thanks.

[Raj Kumar]

Yes indeed, thanks Joseph. My bad.

[Raj Kumar]

So the trip back into AVID did not work. I’ve been using this helpful video as a guide for how it should work ideally.

https://www.youtube.com/watch?v=60vSLLekX6Q

Things I learnt –
1. The kind of footage you are working with matters. My footage was canon 5D footage which has no timecode/tape name associated.

2. I ultimately gave up on trying to do without timecode and used QT Change to add timecode and tape values to (a copy) of my original footage. (shoottime TC derived from the .THM files I believe, and tape of format TAPE+hour from TC, so TAPE01 for clips with tc 01:xx.xx.xx)

https://www.videotoolshed.com/product/42/qtchange

3. I then brought that media into AVID as DNxHD footage (import), assigned the same tape values to the clips in AVID I had set with QT change (for some reason AVID did not get them from the QT file). Ofcourse, first I had to create all those tape names in AVID.

4. Then I put together a quick test sequence in AVID, exported as AAF linking to original files.

5. Loaded this into Resolve (skimping on deets here), graded. Rendered out using the Avid roundtrip option and making sure the FPS was set to 23.98

6. Loaded the graded clips via Media Tool in resolve (skimping on deets here), copied them into a bin, ASSIGNED TAPE NUMBERS AGAIN!, and then did a relink.

7. Voila! It worked. Except for one clip which gave me that “timecode extents doesn’t match” error, but this was a 2 frame clip. Am doing a test to see if there’s a minimum number of frames Resolve needs by creating a sequence that has clips with just 1, 2, 3, 4, 5 frames and seeing if I get that error again.

Things to do:

I now have the unenviable tasks of somehow getting my actual short film’s edited sequence (done without the timecoded clips) to use the clips which have the timecode.

Bottomline, you get that “timecode extants” error for many different reasons, I think, so there’s no one solution that fits all.

My new mantra? For an ENTIRE roundtrip to work, you have to ensure the originating footage has TC and Tape set. 🙁

Hope this helps. Somewhat atleast.

All this may vary with your versions, so my software is MC 5.5 on a Mac, with 8.1.1 version of Resolve Lite.

[Raj Kumar]

What I found was that the start time code Davinci saw was 01:00:00:00 while my sequence TC in AVID was 00:59:58:00.

Setting the TC in Davinci to 00:59:58:00 did nothing. Setting it to 01:00:00:00 in AVID did not seem to work either.

So I found each of my clips started from 01:00:00:00 in Davinci. I figured out this was the problem by looking at the start of a few clips in the sequence, finding out that start timecode should have been, and what it actually was, and realizing the difference was a constant throughout.

I then imported just the clips in the media pool, then changed the Start TC on each to match the start TC in Davinci (01:00:00:00) and then loaded the avid AAF without autoloading the clips.

This worked for me. YMMV.

I’m on Davinci Lite + Avid 5.5.

[Raj Kumar]

Thanks Shane. That was the first thing I looked at.

But the issue is – the original media is H.264. It was transcoded in Compressor to Uncompressed. Then, it was synced to audio, edited in FCP, and the project consolidated, so the resulting media clips have no relation to the original media.

What I was hoping to do was to link the original media to the clips in AVID, and then slip the media to match the start/end of the edited video track I have as a reference. But this strange thing AVID seems to do where it makes the entire associated media play in the clip by speeding or slowing it down as much as it needs to do so it fits the clip length, has thrown a wrench in my approach.