GPU Rendering Tests: Kdenlive 21.04.3 (Ubuntu 20.10)
Channel: Daniel Rosehill
Date: 2021-11-18

I upgraded my Kdenlive to 21.04.3 this morning so as the rendering options looked to have changed, I decided to do another batch of test renders using a small amount of stock footage. 

Results:

MP4-H264/AAC
15.5 MB file size rendered in 20 seconds

NVENC H264 ABR
27.3 MB file rendered in 18 seconds

NVENC H264 VBR
11.7 MB file rendered in 18 seconds

NVENC H265 ABR
27.4 MB file rendered in 16 seconds

Fastest GPU rendering profile: NVENC H265 ABR
Smallest file size with GPU accelerated rendering: NVENC H264 VBR

== Melt commands ==

MP4-H264/AAC:
f=mp4 movflags=+faststart vcodec=libx264 progressive=1 g=15 bf=2 crf=%quality acodec=aac ab=%audiobitrate+'k'

NVENC H264 ABR:
f=mp4 vcodec=nvenc_h264 vb=%bitrate+'k' acodec=aac ab=%audiobitrate+'k'

NVENC H264 VBR:
f=mp4 vcodec=nvenc_h264 rc=constqp vglobal_quality=%quality vq=%quality acodec=aac ab=%audiobitrate+'k'

NVENC H265 ABR:
f=mp4 vcodec=hevc_nvenc vb=%bitrate+'k' acodec=aac ab=%audiobitrate+'k'

By: Daniel Rosehill 

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