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Topics - hdvprojection

Pages: [1] 2
1
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.

2
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.

3
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.

4
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?

5
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.

6
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.

7
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.

8
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.

9
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.

10
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".

11
General Discussion / MPAA Rating Card
« on: August 10, 2013, 06:02:23 AM »
I've been asked to add an NC17 blue card to the end of a DCP. How many seconds must it run? I remember running film, and it seemed like some films had close to a minute of film at the end, other much, much less. I guess the question is whether or not there is a minimum.

12
Digital Cinema Packages / Error while decoding stream #0.0
« on: August 03, 2013, 03:05:00 PM »
I have a QT file from which I cannot seem to extract frames past about the four- or five-minute mark. I just get the stream error from the thread title over and over again.

Code: [Select]
General
Complete name                            : /media/Work/DCPs/LB/LB.mov
Format                                   : MPEG-4
Format profile                           : QuickTime
Codec ID                                 : qt 
File size                                : 141 GiB
Duration                                 : 1h 37mn
Overall bit rate mode                    : Variable
Overall bit rate                         : 206 Mbps
Encoded date                             : UTC 2013-07-09 19:08:27
Tagged date                              : UTC 2013-07-09 19:38:56
Writing library                          : Apple QuickTime
Media/UUID                               : 9BA1645C-FDCD-451F-A80D-C18DD82413E4

Video
ID                                       : 1
Format                                   : ProRes
Format version                           : Version 0
Format profile                           : High
Codec ID                                 : apch
Duration                                 : 1h 37mn
Bit rate mode                            : Variable
Bit rate                                 : 202 Mbps
Width                                    : 1 888 pixels
Original width                           : 1 920 pixels
Height                                   : 1 062 pixels
Original height                          : 1 080 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 29.970 fps
Color space                              : YUV
Chroma subsampling                       : 4:2:2
Scan type                                : Interlaced
Scan order                               : Top Field First
Bits/(Pixel*Frame)                       : 3.354
Stream size                              : 138 GiB (98%)
Writing library                          : Apple
Language                                 : English
Encoded date                             : UTC 2013-07-09 19:08:27
Tagged date                              : UTC 2013-07-09 19:38:56
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709

Audio #1
ID                                       : 2
Format                                   : PCM
Format settings, Endianness              : Little
Format settings, Sign                    : Signed
Codec ID                                 : sowt
Duration                                 : 1h 37mn
Bit rate mode                            : Constant
Bit rate                                 : 768 Kbps
Channel(s)                               : 1 channel
Sampling rate                            : 48.0 KHz
Bit depth                                : 16 bits
Stream size                              : 537 MiB (0%)
Language                                 : English
Encoded date                             : UTC 2013-07-09 19:08:27
Tagged date                              : UTC 2013-07-09 19:38:56

Audio #2
ID                                       : 3
Format                                   : PCM
Format settings, Endianness              : Little
Format settings, Sign                    : Signed
Codec ID                                 : sowt
Duration                                 : 1h 37mn
Bit rate mode                            : Constant
Bit rate                                 : 768 Kbps
Channel(s)                               : 1 channel
Sampling rate                            : 48.0 KHz
Bit depth                                : 16 bits
Stream size                              : 537 MiB (0%)
Language                                 : English
Encoded date                             : UTC 2013-07-09 19:08:27
Tagged date                              : UTC 2013-07-09 19:38:56

Audio #3
ID                                       : 4
Format                                   : PCM
Format settings, Endianness              : Little
Format settings, Sign                    : Signed
Codec ID                                 : sowt
Duration                                 : 1h 37mn
Bit rate mode                            : Constant
Bit rate                                 : 768 Kbps
Channel(s)                               : 1 channel
Sampling rate                            : 48.0 KHz
Bit depth                                : 16 bits
Stream size                              : 537 MiB (0%)
Language                                 : English
Encoded date                             : UTC 2013-07-09 19:08:27
Tagged date                              : UTC 2013-07-09 19:38:56

Audio #4
ID                                       : 5
Format                                   : PCM
Format settings, Endianness              : Little
Format settings, Sign                    : Signed
Codec ID                                 : sowt
Duration                                 : 1h 37mn
Bit rate mode                            : Constant
Bit rate                                 : 768 Kbps
Channel(s)                               : 1 channel
Sampling rate                            : 48.0 KHz
Bit depth                                : 16 bits
Stream size                              : 537 MiB (0%)
Language                                 : English
Encoded date                             : UTC 2013-07-09 19:08:27
Tagged date                              : UTC 2013-07-09 19:38:56

Audio #5
ID                                       : 6
Format                                   : PCM
Format settings, Endianness              : Little
Format settings, Sign                    : Signed
Codec ID                                 : sowt
Duration                                 : 1h 37mn
Bit rate mode                            : Constant
Bit rate                                 : 768 Kbps
Channel(s)                               : 1 channel
Sampling rate                            : 48.0 KHz
Bit depth                                : 16 bits
Stream size                              : 537 MiB (0%)
Language                                 : English
Encoded date                             : UTC 2013-07-09 19:08:27
Tagged date                              : UTC 2013-07-09 19:38:56

Audio #6
ID                                       : 7
Format                                   : PCM
Format settings, Endianness              : Little
Format settings, Sign                    : Signed
Codec ID                                 : sowt
Duration                                 : 1h 37mn
Bit rate mode                            : Constant
Bit rate                                 : 768 Kbps
Channel(s)                               : 1 channel
Sampling rate                            : 48.0 KHz
Bit depth                                : 16 bits
Stream size                              : 537 MiB (0%)
Language                                 : English
Encoded date                             : UTC 2013-07-09 19:08:27
Tagged date                              : UTC 2013-07-09 19:38:56

Menu
ID                                       : 8
Duration                                 : 1h 37mn
Language                                 : English
Encoded date                             : UTC 2013-07-09 19:38:56
Tagged date                              : UTC 2013-07-09 19:38:56

Any ideas how to proceed. The FFMPEG forum redirected people to some YV12 codec for Quicktime which evidently only runs on Windows. I may have misunderstood that, but do I really need to go Windows for this project? Thank you so much in advance.

13
Digital Cinema Packages / Issuer Tag in .27.1
« on: July 16, 2013, 12:05:07 PM »
I have a question about a DCP I generated. It's INTEROP, which was requested by the lab that subsequently did the QC (wailua test, to be precise). They rejected the DCP, saying that the required Issuer tag is missing. Evidently this is an issue with .271 when generating SMPTE copies, but theoretically not on SMPTE.

So I go back to check the XML files, and I find this line right in the ASSETMAP:
Quote
<Issuer>Studio_in_Question..._Plain_as_Day</Issuer>
... and this line in the PackingList:
Quote
<Issuer>Yup...Same_Studio_as Above</Issuer>

What gives? Is the Issuer tag supposed to be located elsewhere as well? Leaving aside the possibility that they didn't even bother checking, what else could be the problem here?

14
I have a film which clearly does not have enough lead time on the front of it... maybe one or two frames of black and silence. Correct me if I'm wrong, but I should be able to create several dozen duplicates of that first black frame, rename them with seven-digit filenames instead of six-digit ones (0000001.j2c, 0000002.j2c, etc.) so that they will be appended to the front of the list by OpenDCP instead of at the end, and then repackage the picture MXF... or no? The audio should be simple enough with Audacity, not worried about it. Any thoughts or simpler/surer workarounds would be appreciated. Thanks.

15
General Discussion / DCP Type Suggestion
« on: April 02, 2013, 11:37:07 AM »
How would any of you categorize your trivia slides, Q&As and such? Suppose I have a series of "Who won the Oscar for Best Picture blahblahblah...?" Would you consider those Transitionals, Policy Trailers or PSAs? I realize much of this is personal preference, but I'm just curious how others are making use of those tags.

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