- Posts: 547
- Joined: Fri Aug 16, 2013 6:07 pm
F18 b5
OS 12.5
opened up older project from a couple years ago to make a few small changes. prev render had alpha ch
render to new mov file with ProRes 444
Bring back new render file into F18 and into main comp and mov shows no alpha. old renders on intel did have alpha. when I rendered I did check there was alpha and saw correct B&W image before render. So no reason to think alpha was no in file.
So either F is not writing some bit in the file correctly, or its. not reading it.
QT player says there is an alpha. Opened file in Compressor, change view to Checker board and indeed there is a good alpha, so F is failing to read alpha in file sometimes but not all the time.
re-rendering mov out of compressor with 4444 preset and load into F, same result F not reading alpha ch.
yet F18 does read some ProRes alphas with no rhyme or reason why its working or not. if you want the file I can provide link to it.
What is ProResHW ? is that M1 hardware encoder ? I tried both with same results, identical file sizes.
UPDATE 1: rendered out ARGB16 uncompressed file. F18 read the alpha but its a 13gb file vs 134mb !!!!! 10X size difference. I'm using this bit X 3 vers which theoretically saves me 12 min of render time but I suspect the file I/O will even that out
S
OS 12.5
opened up older project from a couple years ago to make a few small changes. prev render had alpha ch
render to new mov file with ProRes 444
Bring back new render file into F18 and into main comp and mov shows no alpha. old renders on intel did have alpha. when I rendered I did check there was alpha and saw correct B&W image before render. So no reason to think alpha was no in file.
So either F is not writing some bit in the file correctly, or its. not reading it.
QT player says there is an alpha. Opened file in Compressor, change view to Checker board and indeed there is a good alpha, so F is failing to read alpha in file sometimes but not all the time.
re-rendering mov out of compressor with 4444 preset and load into F, same result F not reading alpha ch.
yet F18 does read some ProRes alphas with no rhyme or reason why its working or not. if you want the file I can provide link to it.
What is ProResHW ? is that M1 hardware encoder ? I tried both with same results, identical file sizes.
UPDATE 1: rendered out ARGB16 uncompressed file. F18 read the alpha but its a 13gb file vs 134mb !!!!! 10X size difference. I'm using this bit X 3 vers which theoretically saves me 12 min of render time but I suspect the file I/O will even that out
S
Last edited by steve oakley on Tue Jul 05, 2022 6:52 pm, edited 2 times in total.
S
mac Studio Ultra 128gb OS 13.5+
TB3 ext 1TB SSD Cache, 1TB SSD Sys
4K 27Dell
Presonus Quantum 2626 TB3 Word clocked 96K
MiniPanel via enet
Behinger Xtouch USB via USB3 Hub->PCIe USB3X4 card
Wacom XL Pro
mac Studio Ultra 128gb OS 13.5+
TB3 ext 1TB SSD Cache, 1TB SSD Sys
4K 27Dell
Presonus Quantum 2626 TB3 Word clocked 96K
MiniPanel via enet
Behinger Xtouch USB via USB3 Hub->PCIe USB3X4 card
Wacom XL Pro