bit-mover Author

Level 1

36 points

FCP ProRes 422 export won't burn to disc via Toast

Issue: can't burn file exported from FCP to disc

OS: macOS 15.6

Final Cut 12.0

Toast 20 Pro

Export format: ProRes422 (apple recommended)

The exported file will play in Quicktime. Toast won't burn it, fails with a macOS error=-1350.

Other burning apps also fail.

Steps taken so far:

System restart (many times)

Consolidate media to new HDD

For file export "Share" function to Apple Devices HD (the share fails).

Send to Compressor, set to ProRes422. File exports, plays but can't be burned

Send to Compressor, set for Apple Devices 1080p HQ, file plays and did burn.

Secondary issues: FCP looses track of render files and render requirements. Render All does not work. I have multiple Compound Clips nested, I have to go to each and render selection. Once all of that is done, FCP still complains that there is a background process that won't comlete if I export. It doesn't state what specifically it is, and there are no dotted render lines. Going forward, the export file can only be made via Compressor. But again the ProRes422 file can't be burned.

Toast 20 Pro symptoms: The project will go through compression (takes a long time) but won't write to a disc, and pops the failure/error message. Corel says I have these issues: Toast 20 is only compatible Sonoma. Suggested burning via "Classic" interface, and to a disc image. Trying that now.

Posted on Aug 7, 2026 11:47 AM

Top-ranking reply

Kurt Lang

Level 9

72,015 points

Posted on Aug 7, 2026 3:14 PM

A few thoughts.

Send to Compressor, set to ProRes422. File exports, plays but can't be burned Send to Compressor, set for Apple Devices 1080p HQ, file plays and did burn.

Does the first line mean you saved the output as 4K? If so, that's one problem. Despite some information you can find on the web about Toast 20, it does not do 4K Blu-ray. 1080 HD is the highest it will do. If you start with 4K source and manage to output a disk with Toast, it will have scaled the video down to 1080 without telling you.

If you output a 4K BDMV folder from another app, you can successfully burn that in Toast 20, but you cannot build a 4K video in the app.

I put together a very simple 1080 video in DaVinci Resolve and output a ProRes422 video. Dropped that into Toast 20 and had no issue creating a Toast disk image (didn't want to waste a Blu-ray disk). This all in the latest version of Tahoe on an M4 Pro mini.

When putting anything together in Toast's lame authoring interface, always use Classic mode. "Updated", as they call it, has always been extremely buggy, besides about as confusing of a layout a person could possibly come up with.

Toast should still work in Golden Gate on any M series Mac as Apple is fully supporting Intel only apps for one more release of macOS. But otherwise, Toast is dead. I've done as deep of a dive as I could, and it's clear Toast is never going to see another new version.

I've looked for updated authoring tools for the Mac, and they are both few and far between, and very limited in what they can do. And they're almost all Intel only. If I were still running my small business, I'd use this Windows app. I have Windows 11 Pro on my M4 running in VMware. I ran this app in demo mode and was able to bring in ProRes422 movies as well as still images and pretty much anything else. It will build 4K video and down. It will also output BDMV and VIDEO_TS folders that can be dropped into Toast 20 to burn disks.

That's really all I used Toast for, as far as video. I did all of my authoring in Encore CS6, output final folders, then used Toast only for burning disks from those completed folders. It's nice to have them that way if you need more copies later because you never have to wait for your authoring app to render your originals all over again before burning a disk. Just drop in the BDMV or VIDEO_TS folder and burn.

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19 replies

Kurt Lang

Level 9

72,015 points

Aug 8, 2026 11:12 AM in response to bit-mover

Nice chart! For me though, a bit of overkill. I know a decent amount about video, but I'm also in the category of, "I know a bit more than enough to be dangerous." 🙂 My real, 45+ year background is image editing.

About the only place I've noticed 4K makes any difference on our TV is small text. I took a few still images and output a ProRes422 1080 video, and again as a 4K video. Both as MPEG-4s and dropped them onto a flash drive. I then played them back on the TV. On the 4K version, you could read the small text. On the 1080 version, it was kind of broken up and not really what you'd call readable. It was more that you already knew what it said than being able to make it out.

bit-mover Author

Level 1

36 points

Aug 8, 2026 12:43 PM in response to Kurt Lang

It's likely mostly a codec difference. You'd have to deal with uncompressed video to really compair. There's a lot between the original and the final version, and if we're using today's Compressor, only some is visible as parameters. IIR, the mid 2000s version had way more user controls.

Kurt Lang

Level 9

72,015 points

Aug 8, 2026 12:52 PM in response to bit-mover

It's likely mostly a codec difference. You'd have to deal with uncompressed video to really compare.

And you'd need a mountain of disk space if working with uncompressed video! ProRes442/444 is lossy, but not as bad as MPEG-4 or MPEG-2.

If you mean between my two test videos, settings were identical. The only difference was the 1080 version started with uncompressed TIFF images sized to 1920x1080 so there would be no image scaling, and the 4K images started at 3840x2160 for the same reason.

The 1080 images lost some clarity just from being sized down. No surprise there. But the video output degraded fine details further. That despite using a high bitrate.

bit-mover Author

Level 1

36 points

Aug 8, 2026 1:21 PM in response to Kurt Lang

...and I also found that different displays and media players scale differently on the fly. Every 4K display is scaling 1080p upward, for example. And not all are equal. Upscaling has the same vague issues. It's extremely hard to isolate resolution alone as the single factor.

But I think your tests are releant, even if resolution isn't the only factor.

FCP ProRes 422 export won't burn to disc via Toast