Search found 2344 matches

by Carsten
Tue Mar 28, 2023 2:25 pm
Forum: DCP-o-matic
Topic: Why does Player report an "invalid frame rate" error for 30fps?
Replies: 3
Views: 20

Re: Why does Player report an "invalid frame rate" error for 30fps?

Yes. There haven't been many revisions of that document. 30fps will work on most systems (but not all). The verification in DCP-o-matic player, though, has to complain about this.
by Carsten
Tue Mar 28, 2023 10:54 am
Forum: DCP-o-matic
Topic: Dolby stereo Encoded soundtrack
Replies: 1
Views: 68

Re: Dolby stereo Encoded soundtrack

There is a simple Mid/Side Decoder in DCP-o-matic, which should work nicely with a Dolby SR encoded source. However, it will not decode to surround channels.
by Carsten
Fri Mar 24, 2023 10:48 pm
Forum: DCP-o-matic
Topic: Apple Mac Studio performance
Replies: 3
Views: 118

Re: Apple Mac Studio performance

Maybe 7fps is normal for 4K-flat on the Mac Studio. Try to perform the 'official' DCP-o-matic Benchmark (2k) on the same machine:

https://dcpomatic.com/benchmarks/
by Carsten
Fri Mar 24, 2023 5:15 pm
Forum: DCP-o-matic
Topic: Coding is very slow
Replies: 10
Views: 233

Re: Coding is very slow

Check CPU activity and swap size in activity monitor. Even with modern SSD discs, swapping definitely kills encoding performance. But it could also be the source file, at 900MBit/s and 4k, decoding will certainly take a significant part. You could easily check that out with different source files. S...
by Carsten
Thu Mar 23, 2023 11:43 pm
Forum: DCP-o-matic
Topic: Coding is very slow
Replies: 10
Views: 233

Re: Coding is very slow

64 threads is too much for a dual x5680. Pretty sure that this causes the swapping when encoding 4k. Swapping is also the reason why the CPU cores are seen idling.
by Carsten
Wed Mar 22, 2023 6:21 pm
Forum: DCP-o-matic
Topic: Coding is very slow
Replies: 10
Views: 233

Re: Coding is very slow

I have seen that happen when DCP-o-matic turns to swapping, which means, number of encoding threads and RAM is not balanced. And often when slower external discs (USB) are used. How many encoding threads have you set? 4k needs four times as much memory as 2k for every thread. Is this a single or dua...
by Carsten
Mon Mar 20, 2023 10:42 pm
Forum: DCP-o-matic
Topic: New verifier issues with IOP
Replies: 2
Views: 114

Re: New verifier issues with IOP

Maybe sometimes it would be good to ask these distributors to what spec, standard or verification tool they listen to.
by Carsten
Thu Mar 16, 2023 10:01 pm
Forum: DCP-o-matic
Topic: Suddenly weird errors when verifying DCP with Player
Replies: 12
Views: 432

Re: Suddenly weird errors when verifying DCP with Player

I think I have seen it before with much older builds. Probably when using different versions for creation and verification, if I remember correctly. I do admit, it could be just a hint or warning in general, but,from the point of strict validation, it would indeed be an error. Even if it would never...
by Carsten
Thu Mar 16, 2023 9:23 pm
Forum: DCP-o-matic
Topic: Suddenly weird errors when verifying DCP with Player
Replies: 12
Views: 432

Re: Suddenly weird errors when verifying DCP with Player

Ooops, I mistook that as the FFEC/FFMC marker requirement for FTR vs. other content types. Still, 'error' or 'warning'?


What is this 'XML malformed' thing? Is it because the XML file does not comply with an XSD, or is it due to some 'low level' character issues, like LF/CR, indentation, etc.?
by Carsten
Thu Mar 16, 2023 6:22 pm
Forum: DCP-o-matic
Topic: Suddenly weird errors when verifying DCP with Player
Replies: 12
Views: 432

Re: Suddenly weird errors when verifying DCP with Player

Yeah, the malformed XML thingy pops up occasionally. Maybe Carl can tell us what it actually complains about. From other threads, I thought it was a bug that should have been ironed out already, but don't know about that between test and release versions. As far as I understood so far, you can ignor...