Geting image problem on Christie

[Ben Edwards]

We keep getting problems similar to the above when playing DCPs. This happens at a certain point (different points for different DCPs) whith needs various timecodes such as around 35b and 57 minutes.

To fix this, we need to eject the DCP and reload it playing just after the problem occurs. The problem happens consistently at the same point for each DCP (i.e., at a different time for each DCP but consistently).

We have tried rebooting the Christie and this does not help.

Details of our kit is

• Projector - CP-2308
• Integrated Media Block - Christie IMB-S3
• NAS - NAS-S2

Any Ideas?

Ben


image.png

[Ben Edwards]

PS We are also getting a SMART disk warning on one of the NAS drives. We are replacing the disk but it seems odd that this seems to be causing this problem on all three of the last DCPs. Requesting sorted the problem. Also, we had this problem once about a year ago.

[Matt Smith]

Hi Ben,

It does sound like it might be related to the HDD issue, and would explain why it happens at the same point on each DCP. Have you tried deleting the affected DCPs and seeing if the issue still occurs or moves to a different point?

[Ben Edwards]

Hi Ben,

It does sound like it might be related to the HDD issue and would explain why it happens at the same point on each DCP. Have you tried deleting the affected DCPs and seeing if the issue still occurs or moves to a different point?

Have reingested one and it fixed it, did not reoccur. I hope it was an HD issue but was wondering if anyone had seen anything similar.

The strange thing is I've seen it before, well something similar. with 35mm film!

[Marco Giustini]

this is bizarre! First time I see a framing issue with a Digital projector

It doesn't make sense that it was caused by an HDD - but it's also a Christie IMB

[Ben Edwards]

Wondering if there is a Christie HD check we can run, I'm not there so not sure but will be in tonight and we are doing a non-film event so could run one.

[Ryan Gallagher]

If it was my content on my doremi I would first run an "integrity check" in the content manager. This checks the as delivered file hash values against the content blocks. If there are file integrity problems it should surface them, and yes re-ingesting might place a good copy on the IMB. But sounds like those drive smart warnings would be good to heed soon.

I'm not a Christie IMB user but found similar instructions in their manuals:

ChristieIMBIntegrityCheck.png

Edit for clarity: obviously ingesting also performs integrity checking as it goes, otherwise ingests fail (or should). If you have integrity issues cropping up after ingest, then it points to file system corruption or disk errors.

[Marco Giustini]

If I remember right, the Christie IMB-3 doesn't do a lot of integrity checking when ingesting... But it's fast!

[Ryan Gallagher]

If I remember right, the Christie IMB-3 doesn't do a lot of integrity checking when ingesting... But it's fast!

if it is not doing so upon ingest then yeah, even more room to introduce errors. Perhaps the source can already be corrupt, network errors, yada yada.

the fact problem vanished upon reingest makes me suspect the server storage, and not the source. Either way integrity check on server is a handy troubleshooting option.

[Carsten Kurz]

If the check is performed at ingest time, and then data corruption occurs later on the storage device, then there is no way to detect this. Some few servers offer a manual data consistency check on already ingested DCPs (I know Barco ICMP does).

[Tony Bandiera Jr]

this is bizarre! First time I see a framing issue with a Digital projector

It doesn't make sense that it was caused by an HDD - but it's also a Christie IMB

He just needs to roll the framing knob...oh wait......

Ahh, the joys of digital. That screenshot reminded me of some of the old Over/under 3D 35mm prints I ran into..things get fun when you misframe those and invert the 3D effect.

I've always liked the Christie projectors (except the horrid Solaria Ones) but hated their IMBs and other oddball accessories.