MeGui very slow

[migmigson]

Hi all,

Some help would be greatly appreciated. MeGui is encoding at a very slow rate (about 4 fps) on my NEW computer (i7-5820 3.3 GHz, 32 GB RAM). I remember it being much faster on my old computer. My main concern is the CPU usage is only about 15%, so there must be a bottleneck somewhere.

avisynth script:

AVISource("E:\Client Renders\etc.avi", audio=false).AssumeFPS(30000,1001)
ConvertToYV12()

x264 script:

program --tune film --pass 2 --bitrate 4096 --stats ".stats" --threads 10 --keyint 300 --bframes 2 --ref 2 --output "output" "input"

x.264 version: 2525 (komisar)
MeGui version: 2524

Anyone know what's going on here? I've browsed the internet and tried many solutions listed in forums and nothing's seemed to work.

[newpball]

What it the CPU utilization of the individual cores?
What disk do you read from and what is the original bitrate

[migmigson]

File information:

original bitrate: 337 Mbps using Lagarith lossless codec, 1080p, .avi container
encoding to: 5 Mbps, 1080p, .mp4 container

Reading and writing to the same drive, WD caviar green 3 Gb/s 64 MB cache (I did not realize this... damn that drive is old and crappy; perhaps this could be the bottleneck, I'll test on a faster drive in the meantime)

For CPUs it looks like 6 threads are at about 40-50% load and the other 6 are doing nothing. When I render an After Effects composition multithreaded, all threads are under a 80-90% load. Would the hard drive bottleneck cause some CPUs to work and some to be idle like that?

[newpball]

original bitrate: 337 Mbps using Lagarith lossless codec, 1080p, .avi container
encoding to: 5 Mbps, 1080p, .mp4 container

Reading and writing to the same drive, WD caviar green 3 Gb/s 64 MB cache (I did not realize this... damn that drive is old and crappy; perhaps this could be the bottleneck, I'll test on a faster drive in the meantime)

Yes, that may certainly be a factor.

Get a WD black for the source and write the results to another drive.

I take it your OS is on a separate SSD?

For CPUs it looks like 6 threads are at about 40-50% load and the other 6 are doing nothing. When I render an After Effects composition multithreaded, all threads are under a 80-90% load. Would the hard drive bottleneck cause some CPUs to work and some to be idle like that?

Your CPU has 6 cores so that could be fine, it depends if hyper threading is enabled. Enabling hyper threading usually, but not always, improves performance. You may want to check that all the filters in your script actually support MT.

Memory may be an issue as well. 32GB is a good choice, I have that as well on my machine but unfortunately avisynth is using the legacy 32 bit architecture, so only 4GB of memory can be used.

[manono]

You may want to check that all the filters in your script actually support MT.

If he provided the entire script he either hasn't installed a multi-threaded version of AviSynth or isn't using it if he has. Using an MT version of AviSynth could speed things up considerably.