During a recent workshop, one of the participants was using a 2018 MacBook Pro, 15" Retina (see screenshot). It uses a nice 6coreHT i7-8850H CPU at 2.6GHz base clock. We were very disappointed with DCP-o-matic's player performance, as even at quarter resolution decoding, it skipped very many frames. We disabled an antivirus software, but no change. I ran through BigBuckBunny to compare encoding speed with my older MacBook Pro, and the CPU/system itself is doing fine, 12.5fps during encoding, which is similar to what other 6coreHT CPUs yield. The machine is running Mojave/10.14.
My personal non-retina 15" MacBook pro uses an older 4coreHT CPU, Sierra/10.12, and encodes BigBuckBunny at half the speed, yet playback performance in player is far better - it plays 25fps at half 2k decoding resolution without any skipped frames.
I reduced the display resolution, because the Retina display has a very high resolution, and currently, DCP-o-matic player has a weak point in pushing the video to the display. That didn't solve the issue either (not the slightest bit). I noticed though, when I encoded BigBuckBunny, that DCP-o-matic wasn't even able to playback the preview of the original source video without stuttering. We tried both 2.12.20 and 2.13.132.
I still believe this has something to do with the display addressing. The filmmaker of course is very disappointed because she paid quite a bunch of $ for this machine.
Did anyone experience something similar on his machine? Unfortunately, there was only limited time during the workshop to analyze the issue, and I don't know anyone personally with a similar machine.
Carl - you mentioned a prototype open-gl output module - could you make a beta version of the player available to see if that is an immediate improvement?
I noticed something interesting on that machine - activity monitor shows only 6 of the 12 HT cores being active during playback in player. Usually, I would think that this would show a weakness with the multithreaded J2K decoder - however, if there is another bottleneck with the actual display process, that could as well mean that the J2K decoder is idling because the display process is too slow in asking for more frames?
- Carsten
Hello!
Can you a recommend me a system requirement for PC, where is installed
DCP-O-Matic?
We need a biggest speed for convert to DCP. A large number of feature films
for the festival. What is best OS for this program, Windows or Linux?
I need a buy PC for speediest converting.
Tnaks!
____________________________________________
Yours faithfully,
Movie Systems Engineer
Ivan Ipatov
tel .: +7 (914) -975-23-76
Russia Federation, 690091
Vladivostok, Primorye
Svetlanskaya 31 St
The network of cinemas "Illuzion"
The cinema "Ocean IMAX". Russia, Vladivostok, 21955
Hi all,
With commit aa4fa75 I'll put DCP-o-matic into "string freeze" until
2.14.0 is released. That means I won't change any of the translatable
strings until then.
This would be a great time for all you lovely translators to update the
translations for DCP-o-matic!
Many of the current translations have significant gaps, as you can see by
checking:
https://dcpomatic.com/i18n
Any help that you can provide is very much appreciated :)
Do let me know if there's anything I can help with. Also, if you intend
to provide translations but haven't got the time, at the moment, do let me
know so I can plan my releases accordingly.
Kind regards,
Carl
Hello, my friend! I have been reading the website and trying to find an
answer to 5.1 mix.
I have a ProRes 4444 XQ with embed 5.1. After I created the DCP I checked
playback in Resolve and all audio channels are present. They all have audio
and are playing. In theater, I am only getting the center channel. Please
help as I have a movie premiere in 1 week. Thank you!
It may have gone by unnoticed (there's a final thread on the dcp-o-matic forum), but, Carl finally solved the issue of encrypted SMPTE DCPs not working on Sony systems.
While it turned out that this was actually a mistake in the Sony server software, Carl was able to fix it in his code as well. Sony has corrected that behaviour in Sony SRX-R51x and SRX-R81x projection systems from software 1.54 up. We did, however, still receive complaints from people who weren't able to control software updates for their target Sony systems, and thus we insisted to solve this issue from within DCP-o-matic as well.
While originally targeted at enabling encrypted SMPTE DCP playback (unencrypted SMPTE or encrypted/unencrypted Interop had no problems), the fix also enables proper verification and validation of all DCPs created by DCP-o-matic on Sony systems, so, no more 'NG/NO' flags in the DCP library. Aside from encrypted SMPTE DCPs, this never caused actual problems, but, especially for beginners, it was an ongoing reason for distrust and discomfort. Some other DCP mastering tools had to solve the same issue when encrypted SMPTE was demanded before Sony 1.54 came out.
The fix is contained in all test versions of dcp-o-matic from 2.13.108 up, and will of cause be in the upcoming 2.14 stable versions.
Regards, and thanks to Carl for not giving up on this. That issue caused by Sony was stupid enough to take much more of Carls time than normally needed for such a trivial bug. Glad it's over. It is also another important step in making SMPTE DCP the default for dcp-o-matic in future releases. Though not yet for 2.14 I think.
As far as I can guess, 2.15 test versions will see editable SMPTE DCP CPL metadata (e.g. markers) and also the step to create SMPTE DCP by default.
As some of you may know, the worldwide transition from Interop to SMPTE DCPs is taking place in 2019, and into 2020 for some areas.
Interop will of cause still be supported by both mastering tools and DCI projection equipment for the forseeable future.
If you're interested in the details, read here:
https://dcpomatic.com/forum/viewtopic.php?f=2&t=1214
- Carsten
Hello Carl,
thanks for creating such a great piece of software,is there any way to
adjust the volume of a DCP? we tried to play the DCP on one of our
projectors but the volume was much too loud. the video is an ad so and will
be played next to other ads and trailers so we cant adjust the volume on
our server or else it would affect everything else. any help here would be
greatly appreciated! thanks.
-Aaron
Hi Carl
My name is Ton Rookachat producer of The Rocket 2013.
Just come across your software today. We have been using openDCP.
I like to offer help in future, please let me know if you need some assistance from Australia or Thailand.
My background is in programming but now produce digital films. And love making DCP,
Also teach at Bangkok University.
I find very good information from your “colour conversion for dcp” as well.
My web www.inux64.com
My official email Triphetrookachat(a)gmail.com
Will buy you beers when you visit Thailand...
Regards
Ton Rookachat
13 Ramkhamhaeng 22
Bangkok 10240
Thailand
HQ
111 London cct
Canberra ACT 2615
Australia
ส่งจาก iPad ของฉัน
Hi,
Is there an option to generate an encrypted DCP using CLI? I did not find in the documentation. Else, is there a trick to do such operation via CLI?
Thanks in advance for your help,
Wunderbarb
