saving images to VFB histroy takes realy long

[Khazmadu]

I'am using the VFB history a lot and had always the problem that saving the images takes way to long.

Here an example:

3500x2000 with 35 passes:
2:31min to save

the image has 460MB and im saving it to an SSD.

Why exactly does it take so long and is there anything I can do to make it faster?

[vlado]

The bigger part of the saving process is taken up by the zlib compression. It is on the "to do" list to try and make the process multithreaded so that it can go through faster.

3500x2000x35x12 is about 2.7 GB that need to be compressed and written to the disk.

Best regards,
Vlado

[Khazmadu]

Thanks for the Info.

Is it possible to deactivate the compression?

[vlado]

For the moment, no. The code allows this, but there is no option exposed in the UI.

Best regards,
Vlado

[Khazmadu]

Why is the saving of the actual file faster?

It's a different Scene this time:

3500x2000 with 16 Passes:
VFB: 1:40min
Writing exr: 0:16min (Starting after the Last Render-Bucked disapeared


Is this an different Compression algorithm?

[vlado]

I don't know. Are you writing an .exr file or a .vrimg file as render output?

Best regards,
Vlado

[Khazmadu]

I'm writing an .exr file. With 32Bit and Scanline Compression.

I tested it again with .vrimg as render output and thats even faster it took just a Second to save.

VFB: 1:38min (530MB)
Render Out as vrimg: ~0.01min (539MB)

The .vrimg from render output is bigger

The images are identical. I compared them in Nuke.

After Converting them to .exr the file size for booth is files the same. So it must be a difference in the Compression.

[Khazmadu]

I could Upload the Scene and .vrimg files if it's helpful.

[Svetlozar Draganov]

.vrimg file is being stored progressively during the rendering, each bucket is written to the disk immediately after its completion.
This of course will make the rendering slightly slower but at the render end you won't monitor any slowdowns.

[Bashmack]

saving images to VFB histroy takes realy long

Does it take this long when opening in safe mode or with empty user profile?

[Svetlozar Draganov]

Not sure what do you mean?