DCP-o-matic users April 2013

users@lists.dcpomatic.com

12 participants
20 discussions

by Leslie Hartmier

Good day! One of the theatres I'm involved with is in need of a preview for a special booking we have upcoming, and the only one we had access to in a reasonable format was in 60 FPS, but since this preview is to be used with a DSS100/DSP100 which does not like anything but 24 FPS, I was attempting to use DVD-o-matic 0.87 x64 Windows version (I have also tried earlier versions before now to the same effect) to change it to 24 FPS, and the outcome was that the audio sounded at least an octave lower. As it is important for our managers to be able to do this with a minimum of fuss and perhaps as streamlined a process as possible, I was wondering if there was something I was doing wrong, or if there is a process to follow for such things. I have found this to be an issue for me before now, but I was hoping that perhaps it was simply that I have done something in error. Also, I was noticing that when I'm converting some video into DCP, DVD-o-matic will change the audio (for 23.976 FPS or 24 FPS, 44.1kHz is adjusted to 48kHz (doesn't seem to sound odd), for 29.97 FPS to 24 FPS, 44.1 kHz is adjusted to 59940Hz (becomes a lower octave, which I cannot use, 30 FPS to 24 FPS takes the audio from 44.1kHz to 60kHz (can't use), and finally 59.94 FPS to 24 FPS changes the audio from 44.1kHz to 59940Hz (also cannot use - deeper again) ( I would have thought that the 60 FPS would be even higher than 30 FPS).) Is there a reason that even if the video is at the frame rate I want, the sound still gets adjusted, and if I'm changing the frame rate, the audio resample goes up, but the sound becomes deeper? I would have thought the sound would becoming more shrill, if anything. Again, I love this program, and the efforts being put into it is amazing, and I'm willing to assume I'm messing something up. I just would like it if I didn't need to use a different program to 'pre-adjust' frame rates to get the audio to sound like the original. Thank you for all the work you do, Leslie Hartmier

11 years, 12 months

Re: [DVD-o-matic] A couple questions...

by Carsten Kurz

Am 28.04.2013 um 12:31 schrieb Leslie Hartmier: > This having caused us trouble (and lost bookings), we simply were told by the company's owner, it must be made into DCP. There is a point in it - but on the other hand, insisting on DCP, and at the same time forcing a 60p-24p conversion is, well, stupid, as the latter guarantees either judder or extreme slowdown. Of course, a 30->24 slowdown may look 'pleasing' at first, because it smoothes out motion, but it simply should not be accepted for a professional presentation. Whatever, if there will be no compromise on other playback options, then you should probably go the mentioned way with an external samplerate and timestretching adjustment. - Carsten

11 years, 12 months

[DVD-o-matic] Lost in transcoding

by Maskinrummet Zita

Yesterday I tried to make my first DCP with subtitles that were not burnt into the source file. It didn´t work out that well, the swedish translation was lost in the process. Yes, the checkbox "with subtitles" was filled. Am I doing something wrong or is DVD-o-matic unable to extract subtitles from this source file? The source file (.mkv) origins from the sub-DCI distribution system used for documentarys and art house movies in Sweden until now. Source file tested on a Tvix Slim S1 running 2.1.0, subtitles visible on screen. DCP file tested on Dolby DSS220/IMB Cat745/Barco DP2K-10s, no subtitles on screen. DSS220 running 4.5.4 (2). DVD-o-matic ver. 0.80 (as I remember) Magnus Eriksson Zita, Stockholm Attached: Mediainfo from the source file.

11 years, 12 months

Re: [DVD-o-matic] A couple questions...

by Carsten Kurz

If the conversion 'looks' okay at 24fps, maybe you should try to convert the audio separately. You might run into sync issues, but it still is worth a try. You could use Audacity's resampling features to make separate audiotracks, then use the separate audio feature of DVD-o-matic. The resampling/sampling rate conversion parameters of course need to be adjusted to match DVD-o-matics framerate handling. But maybe Carl will find a flaw in the conversion you tried. When do you need this finished and what is your source footage format? - Carsten Am 28.04.2013 um 12:31 schrieb Leslie Hartmier: > It is 60 FPS. I can convert it, and it looks good when on screen at 24 FPS after I do the extra stuff to it, and heck, it even looks great if I convert it using DVD-o-matic, the sound just...drops in tone. > > As for an external player, we have had trouble with using Blu-ray players, etc, in that, for some reason, some of these private bookings' content (indie filmmakers, etc) will not work on the players we bought, and I am referring to Sony Blu-ray players, no knock-offs or anything. This having caused us trouble (and lost bookings), we simply were told by the company's owner, it must be made into DCP. Using off-the-shelf Blu-rays/DVDs, I recall we've never had a failure on that, but of course, we don't have any of those, just indie filmmakers with their burned disks (some pressed, but same problem, oddly). Media players and computers seem to work fine (most of the time), but they're inelegant at times. > > Thanks for the response! > > Leslie > > From: "Carsten Kurz" <audiovisual(a)t-online.de> > To: dvdomatic(a)carlh.net > Sent: Sunday, April 28, 2013 4:15:11 AM > Subject: Re: [DVD-o-matic] A couple questions... > > At 60fps and with a DSS100, I would advise to play it from an external player - PC, mediaplayer, whatever, through the projectors DVI input. > > Not that it isn't possible to do this conversion, but with the DSS100 not being able to play 60fps and 30fps, there is little chance for a graceful conversion to this target system. It would need high quality temporal interpolation and, depending on the footage, may still show judder, smearing or ghosting afterwards. > > Is it actually 60p or 60/30i ? > > - Carsten > > Am 28.04.2013 um 11:57 schrieb Leslie Hartmier: > > Good day! > > One of the theatres I'm involved with is in need of a preview for a special booking we have upcoming, and the only one we had access to in a reasonable format was in 60 FPS, but since this preview is to be used with a DSS100/DSP100 which does not like anything but 24 FPS, I was attempting to use DVD-o-matic 0.87 x64 Windows version (I have also tried earlier versions before now to the same effect) to change it to 24 FPS, and the outcome was that the audio sounded at least an octave lower. As it is important for our managers to be able to do this with a minimum of fuss and perhaps as streamlined a process as possible, I was wondering if there was something I was doing wrong, or if there is a process to follow for such things. I have found this to be an issue for me before now, but I was hoping that perhaps it was simply that I have done something in error. > > Also, I was noticing that when I'm converting some video into DCP, DVD-o-matic will change the audio (for 23.976 FPS or 24 FPS, 44.1kHz is adjusted to 48kHz (doesn't seem to sound odd), for 29.97 FPS to 24 FPS, 44.1 kHz is adjusted to 59940Hz (becomes a lower octave, which I cannot use, 30 FPS to 24 FPS takes the audio from 44.1kHz to 60kHz (can't use), and finally 59.94 FPS to 24 FPS changes the audio from 44.1kHz to 59940Hz (also cannot use - deeper again) ( I would have thought that the 60 FPS would be even higher than 30 FPS).) Is there a reason that even if the video is at the frame rate I want, the sound still gets adjusted, and if I'm changing the frame rate, the audio resample goes up, but the sound becomes deeper? I would have thought the sound would becoming more shrill, if anything. > > Again, I love this program, and the efforts being put into it is amazing, and I'm willing to assume I'm messing something up. I just would like it if I didn't need to use a different program to 'pre-adjust' frame rates to get the audio to sound like the original. > > Thank you for all the work you do, > > Leslie Hartmier > _______________________________________________ > DVDomatic mailing list > DVDomatic(a)carlh.net > http://carlh.dnsalias.org/cgi-bin/mailman/listinfo/dvdomatic > > > _______________________________________________ > DVDomatic mailing list > DVDomatic(a)carlh.net > http://carlh.dnsalias.org/cgi-bin/mailman/listinfo/dvdomatic > >

11 years, 12 months

[DVD-o-matic] DVD-o-matic version 0.87 released

by Carl Hetherington

Hi all, DVD-o-matic version 0.87 is now available from http://carlh.net/software/dvdomatic/download.php This version makes the "trim-encode" feature work, so that you can trim videos and not have to encode the bits you aren't using. Best regards Carl Hetherington

12 years

[DVD-o-matic] Delayed batched conversion with DVD-o-matic?

by Karim 'Kasi Mir' Senoucci

Hello everyone, first of all, thanks for the great program, I tried before to create DCP packages with other free toolchains before, but this one makes it really easy. I have a small question, I'm using the Windows version on a standalone PC (no additional encoding servers), by the way. I'd like to be able to create conversion jobs which aren't started right away, but rather be put into a batch for later use, as I often convert half a dozen videos at once. At the moment, I configure the first job, then Select "Make DCP", then configure the next job, select "Make DCP" again, an so on. The trouble is: after selecting "Make DCP" for the first time, the encoding (naturally) starts right away, which means that many GUI controls of DVD-o-matic don't respond anymore. What I'd like to do is create all jobs, and then after I'm finished with them, start the encoding. So far, I haven't found any way to do this. Did I miss something (which is perfectly possible), or did I actually just make a feature suggestion? ;-) Greetings from Germany Kasi Mir

12 years

[DVD-o-matic] DVD-o-matic version 0.84 released

by Carl Hetherington

Hi all, DVD-o-matic version 0.84 is now available from http://carlh.net/software/dvdomatic/download.php This fixes a few bugs: * Sound missing from the start of some films * Incorrect frame rates on re-loading films under some locales * Error messages on startup when forcing the language to English It also adds a simple frame counter and frame back/forward buttons, uses a more accurate ratio for 4:3 conversions and derives its MXF filenames from the name of the film. Best regards Carl Hetherington

12 years

[DVD-o-matic] latest draft digital cinema naming convention

by Carsten Kurz

http://www.isdcf.com/ISDCF/Storage-DCNamingNEW.html - Carsten

12 years

[DVD-o-matic] Temporary folders

by Paul Willmott

Hi Carl Yes - all the folders except the completed DCP could be deleted for normal use. Not a priority, but would be neater in the way I use the software! Cheers Paul Description: Description: SS_2011_CMYKH Low Res Paul Willmott Technical Manager Saffron Screen www.saffronscreen.com <mailto:paul@saffronscreen.com> paul(a)saffronscreen.com 07910 054597

12 years

Re: [DVD-o-matic] faster encoding with GPU?

by Carl Hetherington

On Sat, 13 Apr 2013, Carl Hetherington wrote: > Since creating DCPs takes so much time, I was really happy to see that OpenJPEG has plans to extend their encoder to use GPUs. This might be the cheapest way to > speed up the encoding, but I still have no real numbers on what to expect in performance. The graphs I saw were difficult to compare to modern CPUs/GPUs. > > Will it be hard to implement the usage of both the CPU and the GPU for encoding? Am I silly for hoping this might be good value, or is it better/cheaper to get more > CPUs? It would be nice, and there does seem to be some evidence to suggest that a speed-up is possible. If openjpeg did it, DVD-o-matic could use it very easily. Sadly I don't really have the time to get into it myself just now. As it stands, more CPU wins! Best Carl

12 years

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DCP-o-matic users April 2013