Film-Tech Forum ARCHIVE: SMPTE and INTEROP

This is topic SMPTE and INTEROP in forum Digital Cinema Forum at Film-Tech Forum ARCHIVE.

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Posted by Richard May (Member # 2627) on 03-16-2014, 10:47 AM:

What is the difference? The reason I ask is we have a DCP here that has trouble playing in certain spots. The picture starts to break up. It's always in the same spots. I looked up the specs and it's SMPTE 30 fps. All other content on the server is INTEROP 24fps. Doing some reading I read that Interop has been the standard way I think and SMPTE is newer? Just wondering.

Posted by Carsten Kurz (Member # 5396) on 03-16-2014, 11:51 AM:

What systems are you playing this on, and which software version? There are hardly any SMPTE DCPs around still. The transition is coming. I think a picture breaking up is not likely to be caused by Interop/SMPTE. If your system can not play SMPTE DCPs, it will most likely not ingest or play the content at all. The 30fps could be the issue, though.
As 30fps is certainly coming from a non-cinema environment, one could also question the quality of the DCP conversion. While most current systems do support 25fps and 30fps, 'proper' cinema content should be 24fps.

- Carsten

Posted by Richard May (Member # 2627) on 03-16-2014, 01:02 PM:

Doremi DCP2000. It has the latest software upgrade from October.

Posted by Marco Giustini (Member # 4544) on 03-16-2014, 02:24 PM:

What is the status of your HDD? Does "Diagnostic tool" show any buffer underrun? If so, I'd check the SMART tables on the logs.

SMPTE shouldn't have anything to do with that.

Posted by Richard May (Member # 2627) on 03-16-2014, 02:28 PM:

Everything comes up fine. Sound like just a bad transfer or creation.