my profile | my password | search | faq & rules | forum home

» Film-Tech Forum ARCHIVE   » Operations   » Digital Cinema Forum   » Parsing image MXF file

Author Topic: Parsing image MXF file Harold Hallikainen Jedi Master Film Handler Posts: 906 From: Denver, CO, USA Registered: Aug 2009 posted 10-24-2018 05:37 PM                        I'm interested in determining the X'Y'Z' code values for a pixel in the middle of the screen in a DCP in the middle of the reel. I'm guessing there is software that will convert the MXF to a series of still frames and then software that can tell me the X'Y'Z' code values of a pixel in the middle of the frame. But, I've never done it! Any help would be great! I'm trying to verify that some test content indeed has the correct code values for SMPTE peak white. Thanks! Harold  |  IP: Logged Carsten Kurz Film God Posts: 4340 From: Cologne, NRW, Germany Registered: Aug 2009 posted 10-24-2018 05:56 PM                     If I remember right, Carl has written a tool that does exactly that... Let me see...here: http://carlh.net/dumpxyz I think it's been a while since he worked on it, and some links there seem to be broken. But I'm sure he will help you with it. DCP-o-matic has an XYZ video waveform monitor, but so far I couldn't convince Carl to implement an interactive XYZ cursor readout. - Carsten  |  IP: Logged Harold Hallikainen Jedi Master Film Handler Posts: 906 From: Denver, CO, USA Registered: Aug 2009 posted 10-24-2018 07:25 PM                        EXACTLY what I wanted! THANKS!  |  IP: Logged Scott Norwood Film God Posts: 8146 From: Boston, MA. USA (1774.21 miles northeast of Dallas) Registered: Jun 99 posted 10-24-2018 09:23 PM                        Oh, that is nice. In the past, I have done this in a very convoluted way, using asdcp-test to un-MXF the MXF, converting the j2c file to PNG, and then using a tool from the Imagemagick tool set to give the RGB values: convert <filename> -format "%[pixel:s.p{XXX,YYY}]\n" info: (where XXX and YYY represent the pixel location) I think that Imagemagick now handles XYZ colorspace natively, so there may be some steps that can be skipped. The above-described way is far easier. Thanks!  |  IP: Logged

All times are Central (GMT -6:00)

Printer-friendly view of this topic

Hop To: Select a Forum: Category: Operations -------------------- Digital Cinema Forum Film Handlers' Forum Large Format Forum Ground Level Feature Info, Trailer Attachments & REAL Credit Offsets Category: Community -------------------- Film-Yak Film Handlers' Movie Reviews The Afterlife Bob Maar's Joke-A-Thon Category: Classified -------------------- Equipment and Supplies Wanted/For Sale Help Wanted/Seeking Employment Category: System -------------------- Software Beta Testing Forum

The Film-Tech Forums are designed for various members related to the cinema industry to express their opinions, viewpoints and testimonials on various products, services and events based upon speculation, personal knowledge and factual information through use, therefore all views represented here allow no liability upon the publishers of this web site and the owners of said views assume no liability for any ill will resulting from these postings. The posts made here are for educational as well as entertainment purposes and as such anyone viewing this portion of the website must accept these views as statements of the author of that opinion and agrees to release the authors from any and all liability.