No render in VP9 lossless mode #74443

New Issue

forceengine · 2020-03-04T19:37:00+01:00

forceengine commented

2020-03-04 19:37:00 +01:00

System Information

OS: Win 7
Graphics card: AMD Radeon HD 5800 Series

Blender Version

Version: 2.82

Short description of error
I wanted to export a video with

Container: WebM
Video Codec: WebM/VP9
Output Quality: Lossless

Exact steps for others to reproduce the error

Ctrl + F12 to render animation

Image:

Red Box: Render/Output video. I never get any view of the actual scene
Blue Box: Setting (the only thing you set as above)
Green Arrow: The error message "CQ level 0 must be between minimum and maximum quantizer value (2-31)"

I thought it might be the 4K size or the other setting, but it seems that blender does not like the lossless since perceptually lossless with the same setting works as expected. I also check it with cycles, since my GPU is rather old. Cycles is the same problem.

Blender file
VP9 no lossless.blend

You don't even have to use the video editor. blender seems to have the same problem in the dafault 3D view when you press Ctrl + F12

**System Information** * OS: Win 7 * Graphics card: AMD Radeon HD 5800 Series **Blender Version** * Version: 2.82 **Short description of error** I wanted to export a video with * Container: WebM * Video Codec: WebM/VP9 * Output Quality: Lossless **Exact steps for others to reproduce the error** * Ctrl + F12 to render animation ![vp9 lossless error.png](https://archive.blender.org/developer/F8388318/vp9_lossless_error.png) Image: * Red Box: Render/Output video. I never get any view of the actual scene * Blue Box: Setting (the only thing you set as above) * Green Arrow: The error message "CQ level 0 must be between minimum and maximum quantizer value (2-31)" I thought it might be the 4K size or the other setting, but it seems that blender does not like the *lossless* since *perceptually lossless* with the same setting works as expected. I also check it with cycles, since my GPU is rather old. Cycles is the same problem. **Blender file** [VP9 no lossless.blend](https://archive.blender.org/developer/F8388317/VP9_no_lossless.blend) You don't even have to use the video editor. blender seems to have the same problem in the dafault 3D view when you press Ctrl + F12

forceengine commented

2020-03-04 19:37:00 +01:00

Added subscriber: @forceengine

Ankit Meel commented

2020-03-04 19:52:36 +01:00

Added subscriber: @ankitm

Ankit Meel commented

2020-03-04 19:52:36 +01:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Ankit Meel commented

2020-03-04 19:52:36 +01:00

Please share a simple blend file with external resources if any that helps redoing the bug

Aaron Carlisle commented

2020-03-04 21:31:01 +01:00

Changed status from 'Needs User Info' to: 'Needs Developer To Reproduce'

forceengine commented

2020-03-04 23:44:59 +01:00

I wondered if VP9 really has a lossless mode. Wikipedia says "VP9 is customized for video resolutions greater than 1080p (such as UHD) and also enables lossless compression."

ffmpeg.org says "libvpx-vp9*has a lossless encoding mode// that can be activated using -lossless 1"

Lossless code:

ffmpeg -i input.mp4 -c:v libvpx-vp9 -lossless 1 output.webm

Constanat Quality (CQ):

ffmpeg -i input.mp4 -c:v libvpx-vp9 -crf 30 -b:v 0 output.webm

Constrained Quality (also CQ as shortcut):

ffmpeg -i input.mp4 -c:v libvpx-vp9 -crf 30 -b:v 2000k output.webm

or

ffmpeg -i input.mp4 -c:v libvpx-vp9 -minrate 500k -b:v 2000k -maxrate 2500k output.webm

I have no idea, but could it be that simple that the lossless mode tries to pass arguments using one of the CQ-ways. This would explain why it can not work.

I wondered if VP9 really has a lossless mode. Wikipedia says "VP9 is customized for video resolutions greater than 1080p (such as UHD) and also enables *lossless compression*." [ffmpeg.org ](https:*trac.ffmpeg.org/wiki/Encode/VP9#LosslessVP9) says "libvpx-vp9*has a lossless encoding mode// that can be activated using -lossless 1" **Lossless code:** ``` ffmpeg -i input.mp4 -c:v libvpx-vp9 -lossless 1 output.webm ``` * **Constanat Quality (CQ):** ``` ffmpeg -i input.mp4 -c:v libvpx-vp9 -crf 30 -b:v 0 output.webm ``` * **Constrained Quality (also CQ as shortcut):** ``` ffmpeg -i input.mp4 -c:v libvpx-vp9 -crf 30 -b:v 2000k output.webm ``` or ``` ffmpeg -i input.mp4 -c:v libvpx-vp9 -minrate 500k -b:v 2000k -maxrate 2500k output.webm ``` I have no idea, but could it be that simple that the lossless mode tries to pass arguments using one of the CQ-ways. This would explain why it can not work.

Richard Antalik commented

2020-03-05 03:33:11 +01:00

Changed status from 'Needs Developer To Reproduce' to: 'Confirmed'