Re: [DCP-o-matic] subtitle error

Hi, I recently tried michaelcinquin subtitles (created from srt) with DOM for an SMPTE DCP. It resulted in a DCP that reliably kills a Barco DP4K-23B (connected to Doremi Showvault) within 2 seconds. This crash is so serious that a normal reboot/power-cycle with the power switch was not enough to fix things. I had to realy unplug the Barco from the power to make it work again .. At first I didn't believe that the subtitles caused this to happen, but with re-testing the same thing happens. I use projector subtitles (cinecanvas) on this projector so they are nicely rendered in 4k (something Doremi can't do!). (All my server/projector firmware/software etc. is up-to-date!) Of course the Barco should never crash because of any input, but apparently michaelcinquin produced something nasty for it .. r. On Tue, 23 Feb 2016 11:28:54 +0100 Manuel AC via DCPomatic <dcpomatic(a)carlh.net> wrote: > Very little experience with GDC. I'm adding my colleague in case she > remembers any case. > Subtitles errors are rare even during festivals, but usually fatal and > easy to remember :) We have never seen our usual workflow fail, either > direct from dom or SMPTE with michaelcinquin with first and last > empty. > > Manuel AC > > On Tue, Feb 23, 2016 at 11:10 AM, lilian lefranc via DCPomatic > <dcpomatic(a)carlh.net> wrote: > > > > Le 22/02/2016 20:36, Manuel AC via DCPomatic a écrit : > >> > >> The first one empty is for one of those legendary errors that nobody > >> has ever seen but we keep avoiding :) It goes to say that timing will > >> be off-sync if there is no subtitle on timecode 0. Like it will treat > >> the first subtitle as 0 and ignore the actual timecode, in a similar > >> manner it ignores an entry point. > > > > Maybe that's why I'm facing issues with 25fps SMPTE subtitles and GDC > > servers. > > Have you ever experiencing 25fps DCP with subtitles and GDC? > > The only solution I found is to use IOP subtitles for now... > >> > >> > >> The last one is for SMPTE, don't do it and just wait for a (non) > >> projection with an Alchemy server. > >> Supposedly it just need to be longer than the other content of the > >> reel. I would not be surprised to see a server making random errors if > >> the last subtitle have a very high timecode instead of the actual reel > >> length. > >> Anyone knows the reason behind that length requirement for SMPTE? It's > >> pretty annoying. > >> > >> > >> > >> On Mon, Feb 22, 2016 at 11:11 AM, lilian lefranc via DCPomatic > >> <dcpomatic(a)carlh.net> wrote: > >>> > >>> Le 22/02/2016 10:47, Manuel AC via DCPomatic a écrit : > >>>> > >>>> On Mon, Feb 22, 2016 at 9:44 AM, lilian lefranc wrote: > >>>>> > >>>>> Why do you have empty subtitles at the beginning and the end of your > >>>>> files? > >>>>> It is not necessary for interop and it causes troubles for servers in > >>>>> many cases! > >>>>> > >>>> What combination of factors have you seen fail for that case? I only > >>>> use SMPTE but it's always good to know. > >>> > >>> It causes display issues in some cases (empty subtitle in the middle of > >>> the > >>> reel). > >>> Subtitles after an empty one may not display. > >>> I saw it one time, but I can not say if it's a common issue. > >>> In doubt I recommend not to use empty subtitles in Interop, as it has no > >>> utility. > >>>> > >>>> > >>>>> For smpte I recommend not to put the empty subtitle (ONLY) at the end, > >>>>> it > >>>>> is better if the mxf wrapper does it, as it know the reel duration it > >>>>> will > >>>>> wrap. > >>>>> > >>>> michaelcinquin would not add the empty subtitles unless you told the > >>>> tool to do so, and it does not have access to the reel duration > >>>> because it only receives a subtitle file. > >>> > >>> I don't use this tool so I don't know how it handles the files. > >>> > >>> If you look at the versioning tool, it asks for the CPL file so it knows > >>> the > >>> reel duration. > >>> If not, you have to know the reel duration before wrapping, that's why it > >>> asks for the last TC. > >>> No idea why to let an empty one at the beginning, for me it has no > >>> utility. > >>> > >>> Lilian > >>>> > >>>> > >>>> Manuel AC > >>>> > >> > >> _______________________________________________ > >> DCPomatic mailing list > >> DCPomatic(a)carlh.net > >> http://main.carlh.net/cgi-bin/mailman/listinfo/dcpomatic > > > > > > > > > > _______________________________________________ > > DCPomatic mailing list > > DCPomatic(a)carlh.net > > http://main.carlh.net/cgi-bin/mailman/listinfo/dcpomatic > > > > -- > http://akadcp.com/ > https://www.facebook.com/akadcp > > > _______________________________________________ > DCPomatic mailing list > DCPomatic(a)carlh.net > http://main.carlh.net/cgi-bin/mailman/listinfo/dcpomatic _______________________________________________ DCPomatic mailing list DCPomatic(a)carlh.net http://main.carlh.net/cgi-bin/mailman/listinfo/dcpomatic