This IS the Avid L2: Re: [Avid-L2] Sony FS7 colour conundrum

Friday, May 13, 2016

Re: [Avid-L2] Sony FS7 colour conundrum

DNxHD 185 X MXF

Effect Processing: 16 bit

On 13 May 2016, at 16:41, John Pale pale.edit@gmail.com [Avid-L2] <Avid-L2@yahoogroups.com> wrote:

What is your render codec set to in Media Creation settings?

On Friday, May 13, 2016, 'Knut A. Helgeland' kahelia@mac.com [Avid-L2] <Avid-L2@yahoogroups.com> wrote:

Thanks for your suggestions. It would've been perfect if this was due to the quality toggle in the timeline, but my problem lies in the export from MC and not the playback quality inside MC. Once I export to file, there are obvious banding and artefacts in the video files, and I cannot find any way to work around it.

Getting quicktimes out of MC correctly is a really convoluted process isn't it. I've been trying all the tricks I can come up with to find a formula that works. It looks like any export I do is truncated to 8-bit before entering the codec stage. This goes for all codecs, I'm testing DNxHD 180, ProRes in all variations etc.

In the Avid export settings window I am selecting Keep as Legal Lange, and then depending on which codec I use and the codec settings, the results vary between full RGB, legal range, full range clipped - and all with 8-bit banding issues.

This is when I first render all effects I'n TL or render a video mixdown and export from that. The effect is actually worsened if I export from a timeline with any unrendered realtime fx - In this case there looks to be a double set of bit depth truncations going on.

I'm at the end of my options here, how am I supposed to get this footage out of MC intact?

For reference, a tiff sequence @16 bit comes out correctly. But all quicktime exports are various degrees of broken for me.

What to do?

K

On 13 May 2016, at 04:30, bigfish@pacbell.net [Avid-L2] <Avid-L2@yahoogroups.com> wrote:

What if any I/O hardware is on the system. It sounds like you don't have any I/O hardware but if you do try toggling the hardware off and back on with the button over the timeline. It seems to eliminate some strange behavior although your situation doesn't sound like that's the issue it's worth a try it there is I/O hardware on the system. Definitely check the timeline quality box already mentioned in this thread you want to be green or green with a 10 for 10 bit. I always have a program monitor and don't rely on the computer screen for color correction but perhaps the quality setting is causing this.

---In avid-l2@yahoogroups.com, <kahelia@...> wrote :

I don't edit that much these days, so I'm a little rusty. I don't know if this is a known issue or not.

I've taken on a project that involves editing 40 short segments with 1 minute discussions in a panel. We filmed with a Sony FS7; 1080@25p with a Sony SLog3 profile. I've linked the footage into MC 8.5.0 directly, applied the appropriate colour adapter, and everything apparently plays nice.

But as I try to give this a little grade, it brakes apart as if it's badly compressed 8-bit footage already pushed to the limit with the LUT in the colour adapter.

To check source integrity, I drop a source file into Premiere. It looks perfect 10-bit, can be pushed in every direction, no visible noise or artefacts. But in MC it just looks horrible.

What basic step did I miss here? Something obviously goes wrong on the way into Avid, but I don't know where to start looking for it.

This is on an iMac Retina 5k running OS X 10.11.4. Bin info says I'm using the MSP_MXF plug-in and the footage is XAVC Intra 100.

K