You are currently viewing Updating HDR with cineXmeta

Updating HDR with cineXmeta


Below  is the full transcript for the HDR metadata editing video tutorial.

A lot of newer projects from companies like Netflix, Amazon and Apple are now requiring HDR deliverables.  You can create an HDR ProRes out of Avid or Resolve, but the MOV file you generate will have tags within it that indicate the color space and other color information of the encoded content.

And if those tags are wrong, as you see here, the image won’t look correct and the file will be rejected in QC. So this one as you see is wrong whereas this one is correct. 

One way to fix this is to adjust the metadata in the mov file. Now when it comes to modifying metadata, apps like QuickTime Pro and JES Extensifier have been popular but these applications aren’t really supported in modern operating systems. QuickTime Pro and JES are 32-bit applications and no longer run in Mac OS Catalina and newer. And on Windows QuickTime is considered a security risk and while it may work a product like cineXmeta is an app for modifying video file metadata that’s built on a modern framework, doesn’t require Quicktime and it actually offers more functionality than both QuickTime Pro and JES.

cineXmeta has useful features like the ability to restripe timecode and change your videos full range legal flag but where it really shines is when it comes to adding and modifying HDR and audio metadata. For HDR metadata most companies have documentation on what flags to set in the file metadata. Here’s one for an Apple [file delivery].They’ve specified what all of these flags should be. In cineXmeta I can match the metadata flags to what is recommended so 2020… My first value is BT 2020. EQ for my second value and BT 2020 non-constant for my third value. I also know from checking with my colorist that my display color primary luminance should be set to a minimum of .001 and 4000 for the max. 

Now let’s take a look at this file before we make these changes. Here is the file that we’ll be editing the metadata for. It’s currently not corrected, but it will be momentarily. When we look at this video, we know the color is wrong because it’s too washed out and if we go further into the video this scene should pop much more. If I hit commit changes the metadata updates. I’m going to close the file and reopen so that we can see the changes. As you can see, the file is not washed and the color pops as I scrub through the scene.

The ability to change track labels on audio is really important for file delivery and you can absolutely do that in cineXmeta. Each track has its own user customizable label as well as a channel label where you can set things like left right and center. You can update these tags for any track on a file and you can also swap audio channels. For example, iff dialog is on track one and two and they need to be on track  3 and 4. Everything that I’ve covered in this video from restriping time code to changing HDR metadata to modifying audio metadata can be done not only in an mov file but in an mxf as well.