NVIDIA’s cutting-edge CUDA tech is cool, and it’s been talking about throughout the internet. Also it’s attractive to us, we started cuda working from the start of the year. After a period of hard working, we finally successfully integrated it into MediaCoder, it’s very awsome. We can’t wait to annouce it and publish the test report.
The report mainly compares transcoding performance between CUDA-accelerated H.264 and X264. There are two parts, one is performance on HD encoding, the other is on low resolution encoding.
Test platform: CPU: AMD Athlon(tm) 64 X2 Dual Core Processor 5200+
GPU: NVIDIA GeForce 9600 GT
Memory: DDR2 2G
Source video: transformer.mov preview clip (1920X800), details as fowllowing:
1. Test one: HD encoding(output: 1920X800)
CUDA H264 encoding result
video info get from MediaInfo:
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.0
Format settings, CABAC : Yes
Format settings, ReFrames : 2 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 2mn 16s
Bit rate mode : Variable
Bit rate : 4 801 Kbps
Maximum bit rate : 14.7 Mbps
Width : 1 920 pixels
Height : 800 pixels
X264 result
video info get from MediaInfo:
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.0
Format settings, CABAC : Yes
Format settings, ReFrames : 2 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 2mn 16s
Bit rate mode : Variable
Bit rate : 4 808 Kbps
Nominal bit rate : 5 000 Kbps
Maximum bit rate : 14.8 Mbps
Width : 1 920 pixels
Height : 800 pixels
2. Test two: low resolution encoding(output: 480X272)
CUDA H.264 Result
x264 Result
Conclusion: Generally, CUDA H.264 Encoder is superior to x264 Encoder on my platform(midrange NV GPU and midrange dual-core CPU). Especially doing HD transcoding, CUDA H.264 Encoder is 3~4 times as faster as X264 encoder.
HI: since the AVIVO codec now works pretty well for most windows OSs (even 64 bits) I’m just wondering if you will support ATI STREAM for MEDIACODER soon. Thanks
Hi, could you please support ATI’s Stream too.
Thanks.
Due to license issues, the CUDA encoder is temporaliy disabled.
So i can’t use the CUDA Speed…
Sorry for that. We need a new license to be signed with nvidia before we can re-enable this feature.
What about quality ?
by the way please compare cuda encoder speed vs AMD Phenome x4.
How long until you get the license from Nvidia ?
I thought CUDA was supposed to be free.
to bad. how long will it take until you can reenable CUDA?
We have not yet received the license document from nvidia which they claimed to send us this week.
Does the cudaH264enc.exe encoder have a bitrate limit? I have a large (12GB) move that was trying to transcode to a bitrate of 9700 kbps. The maximum it would outupt was about 4500 kbps. Just wondering.
I could never get it to work from the command line either, even if i did a cut/paste from the console. Always said it was missing a needed parameter…