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Topics - hdvprojection

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1
Digital Cinema Packages / Mismatch in optional length element
« on: April 04, 2019, 04:50:42 PM »
Something odd has happened twice now with two separate projects. I create a DCP, run a check on it, and all is good. This gets copied over to a shared vault, from which someone grabs it and makes thumb drive copies from it, but now it is corrupted. Normally when this has happened (and even this is rare), there is a hash size mismatch on one of the mxf files. Now, twice in as many days, the problem has been with the character count inside the CPL and PKL.

 
Code: [Select]
Error: AM f2c339a0-a7aa-436c-b0d9-17c4af2593be: Mismatch in optional Length element: Asset: ccc8a2e9-fec0-446a-b47b-62ddc55e5eaf: Listed length: 1402 (1.4 KB) Asset on medium: 1435 (1.4 KB)
 Error: AM f2c339a0-a7aa-436c-b0d9-17c4af2593be: Mismatch in optional Length element: Asset: ff3e3c45-b4e2-424a-a62a-cf3b23e224c1: Listed length: 1738 (1.7 KB) Asset on medium: 1778 (1.7 KB)
 Error: PKL ccc8a2e9-fec0-446a-b47b-62ddc55e5eaf: Size mismatch: ff3e3c45-b4e2-424a-a62a-cf3b23e224c1: PKL: 1738 (1.7 KB) Asset: 1778 (1.7 KB)
 Error: PKL ccc8a2e9-fec0-446a-b47b-62ddc55e5eaf: Hash mismatch: ff3e3c45-b4e2-424a-a62a-cf3b23e224c1: PKL: boqrR69Yeao5GnC+j5foY5NF6oM= Asset: YowsdOkHzMFSHHHyxDuq9RjkcQY=

But when I open the originals and the copies to compare, the CPLs and packing lists are identical. I'm at a loss.

I'm attaching the two "versions" of the CPL. Can anyone tell me what's going on? Please and thank you.

2
General Discussion / Is dcinemaform dead?
« on: February 12, 2019, 08:51:56 PM »
Just wondering if everyone has simply moved on elsewhere, which is fine, but I'd like to know where they've moved to. Thanks.

3
Digital Cinema Packages / HI/VI
« on: October 06, 2018, 12:56:38 AM »
Evidently there's been some recent ADA legal activity surrounding compliance by way of the HI/VI systems at US theaters. The theaters are falling in line, but that means the pressure will shift to content providers. It's going to be incumbent upon those of us who encode these things to make sure it's done right.

In another thread I had mentioned that OpenDCP was placing rear surrounds in channels 7 and 8, which is not what most cinema servers are expecting (those are normally HI and VI). Has anyone actually made an HI-VI DCP with OpenDCP? Can you tell me where these two fall in terms of channel placement?

Also, this is a bit more important because it would appear that at least one of the HI/VI systems out there (Dolby's Fidelio) outputs nothing if channels 7 and 8 are empty. If this is true, I think it's a bit of a black eye on them, but still, it may be truer to DCI spec than "faking" HI from the existing audio in the first six channels.

Thanks.

4
Digital Cinema Packages / dcp_inspect no longer installable
« on: February 26, 2018, 04:02:29 PM »
Is there any way to update the setup tool for installing dcp_inspect? This is what I get on a fresh install of Xubuntu 17.10:

Code: [Select]
Package libpng12-dev is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'libpng12-dev' has no installation candidate
apt-get: Failed to install basic requirements

5
Technical Support / DCP-O-Matic
« on: November 19, 2017, 10:17:38 AM »
I realize that this may or may not be verboten here, but I've tried posting to their forum and no one responds. Besides, I noticed Terrence's name attached to it as a dev, so...

I can't install DCP-O-Matic on my Linux box, only on the Windows side of it. It keeps saying
Code: [Select]
Couldn't find any package whose name or description matched "dcpomatic_2.10.5-1_amd64.deb. Unable to apply some actions, abortingThis would suggest that I've either misnamed the file in the install command, or that I'm in the wrong directory. Neither is the case, I assure you. I cd to the correct directory, and I drag-and-drop the file into the install command.

Has anyone else had issues with this, and how did they get around it? Thanks.

6
Digital Cinema Packages / 7.1 Channel Mapping - Feature Request
« on: April 26, 2017, 01:56:04 PM »
Terrence,

Can the next version of OpenDCP either place the rear surrounds on channels 11 and 12 by default (with mutes in 7 through 10) or give the user the option to decide where these channels should go? I realize that there is evidently no effective "standard" for this beyond the first six channels, but the recommendation from Dolby and others is to have HI/VI in channels 7 and 8. Indeed, most theaters' sound systems are set up to expect the Dolby-recommended layout, and 7.1 DCPs created on OpenDCP do not play properly without some tinkering. Thanks.

7
Digital Cinema Packages / Audio Format Metadata
« on: April 22, 2017, 03:34:55 PM »
How do I add the audio format of my DCPs to the CPL metadata. Several of the systems our exhibitors use ignore the name (they don't bother parsing out the "20", "51" or "71") and they cannot or will not simply detect the number of streams. They are looking for direction from the CPL, evidently a line like "cpl-meta:MainSoundConfiguration".

I'm not seeing options for this in OpenDCP, unless it has something to do with adding digital signatures. Is that it, or do I have to manually edit the CPL? If the latter, how would I do that?

We'd been led to believe that the Dolby 850 would automatically detect a 5.1, 7.1 or Atmos DCP and switch formats accordingly. I'm not so sure anymore. Please advise. Thanks.

8
OpenDCP / OpenDCP adds pop at tail of audio
« on: August 19, 2016, 04:08:18 PM »
I tried searching to see if anyone else had posted about this, but didn't see anything. I'm going back over all of my old DCPs, specifically the ones with 5.1 audio, and I'm finding - randomly - that  OpenDCP is adding a one or two frame long pop at the tail of each audio channel, always just the bottom of the waveform. Please see the attached jpegs. The pop is not present in any of the source WAVs.

Based on the common denominators of the DCPs exhibiting this flaw, I suspect it is related to duration adjustment at the packaging stage; they all had audio MXFs which were a frame or two longer than the picture MXF. Is there anything to be done about this? It looks and feels like a bug. Thanks.

9
General Discussion / Reds after J2k conversion
« on: May 17, 2016, 04:43:39 PM »
Has anyone else noticed a particular weakness in JPEG2000 with the color red? Maybe I'm imagining it, but whenever I have a spot or slide with an abundance of red (especially with a different color text overlay), I'm pretty much forced to max out the image bandwidth to avoid compression artifacts. I'd prefer to stick with OpenDCP's default 125MB/s, partly because of network bandwidth limitations, but the slides and ads with red are killing that. Any thoughts or experiences with this?

10
General Discussion / AVCONV Problems with MOVs
« on: March 03, 2015, 12:17:39 AM »
Is anyone else experiencing problems extracting frames with avconv? I keep getting these weird blocking issues, for lack of a better word, random frames will have these rectangular blocks throughout the frame that appear to be overlays or relics of previous frames. Not sure at all that's what they are, but that's what it looks like. Attaching a sample frame (don't mind the smudges... that's me.

Update: Sure enough, when I uninstalled avconv and installed a static build of ffmpeg, problem's gone.

11
Digital Cinema Packages / Reverse-engineer Subtitles?
« on: December 11, 2014, 03:06:16 PM »
I created a sort of "karaoke" DCP, with subtitles for the songs, last year. It played perfectly on about half the screens where it was shown, the others subtitles never showed (GDCs with Christie projectors). This year I can't get them to show up anywhere. The consensus seems to be that the font is the issue, and that I should change it to a "safer" font... something like Arial I'm assuming.

Here's the problem: I no longer have the source files, specifically the SRT. Is there a way for me to extract the subs from the subtitle MXF? Thanks in advance.

12
Digital Workflow / Cross-conversion - 29.97 to 24fps
« on: May 11, 2014, 03:39:36 AM »
Hello everyone. There is a theater I am regularly producing DCPs for which cannot play 30fps. The problem is obvious for anyone who's done a few of these: simply dropping frames looks awful if there are panning shots in them. But given how many young filmmakers come from TV, where everything is outputted at 29.97, it's a tricky business. The solution would seem to be cross-converting the source file to 23.98fps and then working from that. The question is, what's the best way to do that? Is there a basic command line solution in ffmpeg to get this done? TIA.

13
Digital Cinema Packages / Annotation vs. Content Title
« on: January 13, 2014, 03:20:08 PM »
Hello all,

I'm having an issue repackaging DCPs produced elsewhere, the problem being that I cannot seem to change the "ContentTitleText" field. I would have thought that it would have been one or the other Annotation field on the DCP tab, but no. The GDCs in our network are ignoring the Annotation field entirely and listing our DCPs in the library by the ContentTitleText only.

The short background story is that the labs producing our DCPs are using the usual hyper-abbreviated naming conventions, whereas we're trying to help theater managers locate our spots with something resembling standard English instead, and also with a uniform prefix on all of our spots so that they will all be in one bunch in their libraries. All of my efforts to this end have proven worthless thus far.

Any thoughts? Am I going to have to manually edit the ContentTitleText line in the Composition Playlist? Can that be done without corrupting the DCP hashes? Thank you.

14
Digital Workflow / "Karaoke" subtitling
« on: December 03, 2013, 07:01:43 AM »
I have a potential project I'm researching, and I'd appreciate any input. Suppose someone wanted (as they do) to run a karaoke-style screening of some old musical... Sound of Music, Rocky Horror, whatever. If my source is a BRD with full subtitles, how would you suggest I go about doing three things:
  • Grabbing all subtitles (what sort of file? Plain text? Never done this before at all, so...)
  • Deleting all subtitles that are not sung (tedious, I know, but necessary)
  • Scooting the remaining text (musical parts) forward slightly, so as to precede the actual lyrics as they are sung
The final result will be a DCP, so I guess I also need to know how to produce a functioning subtitles MXF. Any thoughts and guidance is much appreciated.

15
Digital Cinema Packages / Hash mismatch
« on: October 26, 2013, 03:00:44 AM »
I was asked to check out a movie trailer at a local theater, which was claiming an exception immediately at ingest. Wow... I used dcp_inspect, and I don't think I've ever seen so many things go wrong with a DCP.

Code: [Select]
Error: PKL 7069df5a-4812-468e-b26a-c2727221c401: Hash mismatch: d674e0df-a4f5-4006-bb7e-276d3345e3ca: PKL: eygar5lxTMyDytuMWc3X2iTdG2Y= Asset: vYS9gV47ZzVM/ChWTVDwS0E8b3Q=
 Error: CPL 8810c820-b683-4061-98dd-0aa090a03e39: Composition type: Undetermined
 Error: CPL 8810c820-b683-4061-98dd-0aa090a03e39: Composition incomplete
 Error: CPL 8810c820-b683-4061-98dd-0aa090a03e39: Expected to scrounge 1 aspect ratio (1 reel) but got 0
 Error: CPL 8810c820-b683-4061-98dd-0aa090a03e39: Expected to scrounge 1 picture resolution (1 reel) but got 0
 Hint: CPL 8810c820-b683-4061-98dd-0aa090a03e39: Reel 1: MainSound has 2 channels: Expected to mostly work. Use 5.1, 7.1, 7.1DS or wild track to make sure
 Hint: CPL 8810c820-b683-4061-98dd-0aa090a03e39: Naming convention: Part film_title "FeatureName" of "FeatureName_TRL_S_EN-EN_US-13_20-EN_2K_FB_20131021_TLF_V3" does not match strict form
 Hint: CPL 8810c820-b683-4061-98dd-0aa090a03e39: Naming convention: Part film_title "FeatureName" contains lowercase letters
 Hint: CPL 8810c820-b683-4061-98dd-0aa090a03e39: Naming convention: Expected number of parts present in "FeatureName_TRL_S_EN-EN_US-13_20-EN_2K_FB_20131021_TLF_V3"
 Hint: CPL 8810c820-b683-4061-98dd-0aa090a03e39: Naming convention: 8 parts matching: studio:"FB" facility:"TLF" film_title:"FeatureName" aspect_ratio:"S" language:"EN-EN" audio_type:"20-EN" resolution:"2K" date:"20131021"
 Hint: CPL 8810c820-b683-4061-98dd-0aa090a03e39: Naming convention: 3 parts missing: content_type, territory_rating, package_type

Several odd things about this, the first being that the DCP was evidently made with OpenDCP. The second being that when I tried extracting frames from the picture MXF file, to see if there was any image at all coming out, ffmpeg crash (segmentation fault). First time it has ever done that for me.

A) Is this meant to be an active discussion thread?
B) Would anyone be interested in examining this DCP, even just out of curiosity?

P.S. - The permissions were completely wrong, to boot. No privileges for anyone except the owner, "999".

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