You can list private options such as with ffmpeg -h encoder=libx265. The private options are specific to each individual encoder. There are two types of options: general and private. Option mixupĪlso, you're mixing up options: -rc vbr_2pass -rc-lookahead 20 -gpu any are private options for nvenc_hevc, but you attempted to apply them to libx265, so they were ignored. NVENC is more suitable when speed is more important than quality or encoding efficiency, or when the CPU is not available or not up to the task, such as on a mobile platform where using the CPU would possibly consume more battery power and take a long time. x265 may be slower, but it provides more quality per bit. These encoders are generally for different use cases. What settings, options, and algorithms they use is up to the authors as long as the output conforms to the specs. X265 and NVENC are two different encoder implementations that can output the same format, HEVC. Just because you can get a hamburger at different restaurants doesn't mean they'll taste and look the same. | Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. | GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. When encoding I seem to only be using a small percentage of the GPU despite the huge performance increase: nvidia-smi -l +-+
My command is: ffmpeg -i infile.avi -c:v nvenc_hevc -rc vbr_2pass -rc-lookahead 20 -gpu any out7.mp4įfmpeg -i infile.avi -c:v libx265 -rc vbr_2pass -rc-lookahead 20 -gpu any out7.mp4 With that understanding the resulting file sizes would be identical regardless of which I used, just the nvenc_hvec would be faster. Obviously I would like to keep the low file size, but take advantage of the GPU to process it 15X faster.Īnyone else have any experience with this video codec? My understanding is that the difference between libx265 and nvenc_hvec is not the algorithm that is used to do the compression, but that it utilizes the GPU to accelerate processing. Doing the exact same command with libx265 gives me a file size of only 68M. My input file is 269M and when I use the nvenc_hevc it grows to 394M. Using the library libx265 I am getting about 85fps when working on a file that is 720p, but if I use the nvenc_hevc I get around 600-700fps
I am working with x264 files to x265 and wanted to go faster. I got a new Nvidia GPU to speed up my video encoding.
0 kommentar(er)
