DPX Output - corrupt header?

[capmar]

Hi,

I am testing out NConvert for cropping and scaling down an image sequence. The existing image sequence is in 10bit linear DPX, and as I would like to preserve the full colour depth I want the output as 10 bit linear DPX as well.

My current problem is that the DPX files output by NConvert may not be read back by any other image program. I found a similiar thread on this forum discussing the same issue;
http://newsgroup.xnview.com/viewtopic.php?t=749

Has there been any improvements to this problem or are they soon planned?

Also, does NConvert now support upscaling the 10bit DPX files to 16bit for filtering, and downscaling the result to 10bit on output to keep the best colour depth?
http://newsgroup.xnview.com/viewtopic.php?t=454

Best regards,
Mario Caprino

[xnview]

I am testing out NConvert for cropping and scaling down an image sequence. The existing image sequence is in 10bit linear DPX, and as I would like to preserve the full colour depth I want the output as 10 bit linear DPX as well.

Be carefull, NConvert load always DPX picture in 8bits...

[capmar]

Hi,

Thanks for the reply. I was hoping NConvert would soon support 16bit colour processing.

I am currently using ImageMagick's convert... but it feels uneedely slow for processing large amounts of images. I have a greater impression of NConvert's processing speed, but can not use it as long as it output's incompatible DPX headers, and colour information is clamped to 8bit.

Hopefully these are features you may consider to add to future versions of NConvert.

Best regards,
Mario Caprino

[xnview]

Hi,

Thanks for the reply. I was hoping NConvert would soon support 16bit colour processing.

I am currently using ImageMagick's convert... but it feels uneedely slow for processing large amounts of images. I have a greater impression of NConvert's processing speed, but can not use it as long as it output's incompatible DPX headers, and colour information is clamped to 8bit.

Hopefully these are features you may consider to add to future versions of NConvert.

ImageMagick use 16bits in internal routine??

[capmar]

http://www.chemie.fu-berlin.de/chemnet/ ... gelog.html

ImageMagick can now be compiled in 16-bit mode for the direct viewing and manipulation of 16-bit images (PNG, VIFF, TIFF, etc.)

Ofcourse I might still be wrong, in which case I have been using a slower tool and still get my data clamped to 8 bits

Sadly I haven't found any tool that might tell me if my 10bits DPX file has been clamped, and in fear of loosing colour depth along the way I am thus trying to process all files in 16bit.

Best regards,
Mario Caprino