I thought I would share this in the general section because I fell into a trap with a hard to find solution.
In the past I have used camera JPEGS, batch cropped and resized with IrfanView. You work out from the TV native resolution what variables to put into Irfanview. Because Irfanview saves the batch profile, you can create 3 profiles for say top crop, center crop, and bottom crop. Usually I would preview jpegs copied from the camera card, decide which area to crop and place each file in one of three folders and run IrfanViews batch command. It takes seconds to crunch a bunch of jpeg files ready to display on a flat screen TV.
Since I've had my D750 I have shot combined NEF (raw) and JPEG Fine. I decided a sensible workflow would be post processing in NEF raw then convert to JPEG and run Irfanview batch to resize. I've tried PS actions, but didn't get on with it.
My last set of holiday photos failed to display on my oldish Pioneer plasma displaying error (!) on each thumbnail. I have been all around the houses trying to find a solution and here it is:
First I downloaded an excellent free app. called JPEGsnoop. This shows you everything in the file header you cannot see with EXIF viewers. I compared an unedited JPEG fine file off the D750 with the NEF raw file post processed to JPEG in PS. The PS edited file adds a lot of 'stuff'. But the important difference is the camera JPEG even in fine mode uses chroma (color) channel sub sampling (4.2.2) whereas all post processed export in Adobe PS use no chroma sub sampling. Try this app. to see just how much Adobe adds to your image files!
My TV and many others including Sony have card slots which I suspect are intended for camera cards with a JPEG file format using chroma sub sampling. Unfortunately there is no easy way of telling if an unplayable file is chroma sub sampled or not which is why JPEGsnoop is a great tool.
Now I have a few thoughts. Most Adobe products do not produced chroma sub sampled JPEG output. I can see their reason because if an input file is already sub sampled you preserve quality by not re-sampling. But there is a little understood trick which Adobe get up to. When you 'Save as' JPEG you set the quality threshold. Medium Quality threshold 6 WILL output a chroma sub sampled JPEG. Medium threshold 7 and above uses no chroma sub sampling. Medium threshold 7 is not advised by many PS users. The problem with this is you cannot have the lower compressed highest quality (luminance) larger JPEG files with chroma sub sampling. Unprocessed camera JPEGS still deliver better quality.
Then I have another conundrum. Nikon are doing what every other camera manufacturer does by offering High quality JPEG Fine - but it is chroma sub sampled and really not the highest quality JPEG could deliver. In a professional camera where JPEGS may be used, I might have expected Nikon to take the Adobe approach of turning off chroma sub sampling in the highest JPEG quality mode. Of course there will be some increase in file size, but not huge.
I still want to keep my post workflow in NEF raw and I've been unable to find an easy App to sub sample Adobe processed JPEGS to show on my TV. For now I am continuing to shoot NEF+JPEG and don't post process the camera JPEGs in Adobe products. However, I think I might start using a dedicated media player over HDMI to store my TV photos and get around the internal TV JPEG format restriction.
In the past I have used camera JPEGS, batch cropped and resized with IrfanView. You work out from the TV native resolution what variables to put into Irfanview. Because Irfanview saves the batch profile, you can create 3 profiles for say top crop, center crop, and bottom crop. Usually I would preview jpegs copied from the camera card, decide which area to crop and place each file in one of three folders and run IrfanViews batch command. It takes seconds to crunch a bunch of jpeg files ready to display on a flat screen TV.
Since I've had my D750 I have shot combined NEF (raw) and JPEG Fine. I decided a sensible workflow would be post processing in NEF raw then convert to JPEG and run Irfanview batch to resize. I've tried PS actions, but didn't get on with it.
My last set of holiday photos failed to display on my oldish Pioneer plasma displaying error (!) on each thumbnail. I have been all around the houses trying to find a solution and here it is:
First I downloaded an excellent free app. called JPEGsnoop. This shows you everything in the file header you cannot see with EXIF viewers. I compared an unedited JPEG fine file off the D750 with the NEF raw file post processed to JPEG in PS. The PS edited file adds a lot of 'stuff'. But the important difference is the camera JPEG even in fine mode uses chroma (color) channel sub sampling (4.2.2) whereas all post processed export in Adobe PS use no chroma sub sampling. Try this app. to see just how much Adobe adds to your image files!
My TV and many others including Sony have card slots which I suspect are intended for camera cards with a JPEG file format using chroma sub sampling. Unfortunately there is no easy way of telling if an unplayable file is chroma sub sampled or not which is why JPEGsnoop is a great tool.
Now I have a few thoughts. Most Adobe products do not produced chroma sub sampled JPEG output. I can see their reason because if an input file is already sub sampled you preserve quality by not re-sampling. But there is a little understood trick which Adobe get up to. When you 'Save as' JPEG you set the quality threshold. Medium Quality threshold 6 WILL output a chroma sub sampled JPEG. Medium threshold 7 and above uses no chroma sub sampling. Medium threshold 7 is not advised by many PS users. The problem with this is you cannot have the lower compressed highest quality (luminance) larger JPEG files with chroma sub sampling. Unprocessed camera JPEGS still deliver better quality.
Then I have another conundrum. Nikon are doing what every other camera manufacturer does by offering High quality JPEG Fine - but it is chroma sub sampled and really not the highest quality JPEG could deliver. In a professional camera where JPEGS may be used, I might have expected Nikon to take the Adobe approach of turning off chroma sub sampling in the highest JPEG quality mode. Of course there will be some increase in file size, but not huge.
I still want to keep my post workflow in NEF raw and I've been unable to find an easy App to sub sample Adobe processed JPEGS to show on my TV. For now I am continuing to shoot NEF+JPEG and don't post process the camera JPEGs in Adobe products. However, I think I might start using a dedicated media player over HDMI to store my TV photos and get around the internal TV JPEG format restriction.