Progressive Rendering: generate video preview #60980

New Issue

Sybren A. Stüvel · 2019-01-29T15:16:49+01:00

Sybren A. Stüvel commented

2019-01-29 15:16:49 +01:00

Having a video preview (at least of the first sample chunk) would improve usability of the progressive rendering, as only a list of linear EXR files isn't all that useful.

This would require correct conversion from the linear EXR files to the desired output colour space. Options to investigate are:

Use OpenColorIO's ocioconvert tool to convert the files, then feed to FFmpeg.
Use the Blender sequence editor to output PNG files in the correct colour space to feed to FFmpeg.
- Open the job's blend file, duplicate the scene with 'copy settings only', fill the VSE with the EXR sequence, then render to PNG.
- Create a new blend file, copy certain colour/OCIO-related settings (using BAT maybe?) from the original blend file, then fill the VSE with the EXR sequence and render to PNG.
Bake a LUT file from Blender's colour settings, and give that to FFmpeg to let it do the colour conversion.

Having a video preview (at least of the first sample chunk) would improve usability of the progressive rendering, as only a list of linear EXR files isn't all that useful. This would require correct conversion from the linear EXR files to the desired output colour space. Options to investigate are: - Use OpenColorIO's [`ocioconvert` tool](http://opencolorio.org/userguide/tool_overview.html#ocioconvert) to convert the files, then feed to FFmpeg. - Use the Blender sequence editor to output PNG files in the correct colour space to feed to FFmpeg. * Open the job's blend file, duplicate the scene with 'copy settings only', fill the VSE with the EXR sequence, then render to PNG. * Create a new blend file, copy certain colour/OCIO-related settings (using `BAT` maybe?) from the original blend file, then fill the VSE with the EXR sequence and render to PNG. - Bake a LUT file from Blender's colour settings, and give that to FFmpeg to let it do the colour conversion.

Sybren A. Stüvel self-assigned this 2019-01-29 15:16:49 +01:00

Sybren A. Stüvel commented

2019-01-29 15:16:50 +01:00

Added subscriber: @dr.sybren