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Prores deliveries not making me happy - Glitches

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Frank Gothmann
Prores deliveries not making me happy - Glitches
on Jan 21, 2014 at 3:08:24 pm

For quite a while now we are seeing some weird Prores (regular, HQ as well as 4444) glitches with material coming to us from a wide variety of sources, some of them very high profile Hollywood labs.

It’s not related to how we play or work with the files, it’s confirmed to be on the files themselves on any given system, Mac or PCs.
What we see is a digital glitch/dropout, always within the first two minutes of a file.

What we could find out so far is that:

- It affects approx every 1 out of 20 files (90 minute 1080 or 2k resolution).
- It can happen with files that are captured (card vendor doesn’t matter, no dropped frames reported during capture)
- It can happen with files copied to external or internal HFS+ or NTFS drives.

The sources are always clean.
It ONLY happens with Quicktime and only on Mac systems.

Doesn’t happen at all with DnxHD MXF, Cineform AVIs, HQX AVIs or DPX.

We had 40 of those files last year not passing our QC, all of them QT Prores. We had zero fails in non-QT formats.

We are suggesting now to not use Prores but unfortunately that’s what a lot prefer to deliver.

Anyone know more about this?

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