Speed of writing DPX header informations

[aberkl]

I noticed when just changing/setting a DPX header attribute like convert [sourcefile] -define dpx:television.time.code=23:59:59:24 [destinationfile] this takes a long time since the complete DPX file/image ist created "from scratch" although no image information is meant to be changed.

Since I only want to change or set a very small part of the file (timecode in the header in the example above) I wonder if there is a chance to speed this up. I understand that convert is meant to convert/process image content rather than to touch only header informations, so there could probably be another module which only reads/writes DPX headers.

Or is there probably a freeware tool/script to batch process DPX headers by just touching these informations and leaving the image content as it is?

Thanks, Andreas

[fmw42]

don't know if this helps but see http://www.imagemagick.org/Usage/formats/#dpx

[aberkl]

Hi fmw42,

if you mean the perl script dpx_timecode.pl: Well it automates of course the process but still uses convert which is very slow for this job. I am thinking for some kind of "poke" script were I only would have to "insert" 8 digits in the DPX header.

Best, Andreas