Re: gm display unrecognized command 'display'
Bob Friesenhahn <[email protected]>
| Newsgroups | gmane.comp.video.graphicsmagick.help |
|---|---|
| Message-ID | <[email protected]> |
On Tue, 17 Nov 2015, McDowell, Blake wrote: > Hi Bob, > > Thanks again for the insightful info. I didn't realize GM rewrote > all of the pixel data. Slow is definitely an issue with that, though > from an archival perspective we would have more of an issue with > putting the files through a whole other process - something we > generally like to avoid for our master files. Do you have any > software in mind that would perhaps be better suited for rewriting > DPX header data without rewriting the data? Maybe something like > mkvpropedit > (https://www.bunkus.org/videotools/mkvtoolnix/doc/mkvpropedit.html) > but geared toward .dpx? I am not aware of any specific software. DPX uses specific field offsets and sizes. It is important to know if a DPX header section exists and the offset to the data. If the header section does not exist and there is not free space for it prior to the data offset, then the whole file would need to be re-written. Even a Python script could be used to update DPX file headers. Code from GM could be re-used for this purpose (even within GM) but GM currently only supports reading from files, and writing files from scratch. It does not currently have modes for updating an existing file. If the existing coder is used, then a new interface (other than read/write) would need to be devised to call into it. Since GM supports subcommands, a new subcommand for editing properties of an existing file could be added without disturbing the other commands (or existing users). > Perhaps the GM development team is interested in having this as a GM sponsored feature? This is certainly interesting but there is no shortage of things to do. This is an area where an interested party with the capability could contribute. Bob -- Bob Friesenhahn [email protected], http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ ------------------------------------------------------------------------------