FFMPEG AVI to FLV Converting Help!

[sp0oon]

Hello ladies and Gents,

I've been using FFMPEG to convert AVI"s to FLV's for some time now and I am very happy with the results. I have query.

Recently I bought a new computer "because my old one crapped out" and video are now converting 3 times slower then they were converting on my old PC. I used to have a quad-core desktop PC but decided to get a dual core Intel Atom lap-top.

In any-case, I have reason to believe that it's because of the processor power but I just want to confirm that with someone. Is there anyway I can speed it back up? I'm converting at around 40FPS while before I would go at over 200FPS.

Thank you in advance for you help.

[Baldrick]

Intel atom is very slow.

[sp0oon]

Hello Baldrick, so you think the issue has to do with the processor? Is there anyway to speed things up?

[redwudz]

The Atom processors are fine for netbooks as they consume very little power. But the one I have is a 1.6Ghz version and not really that suitable for encoding as it is much too slow. No fix that I am aware of will speed it up much, especially compared to a quad core running at faster CPU speeds.

Encoding is almost all CPU intensive and the faster the CPU runs, the faster the encoding. Multiple cores help with some formats that are able to run on more than one core at a time, such as X.264 and Divx/Xvid. I don't know about ffmpeg and FLV conversion.

You could check to see if both cores are being utilized by looking at the Task Manager>Performance during an encode. If only one, then check to see if there is a multi-thread option in ffmpeg. The fastest encoding will usually be when both cores are approaching 100% utilization.

If your notebook came with minimal RAM, say 512MB or less, then upping it might help if you are having lots of disk access generated by the paging file. The computer uses the HDD when it runs low on RAM storage space and that will slow down operations. Most Atoms run with the XP or Linux OS and about 1GB of RAM is the usually the maximum they would need.

[sp0oon]

Thank you for the reply.

My atom has 2GB or ram I believe and when encoding the cpu is only at 25 percent. I looked into multithread for ffmpeg and I tried the command "-threads 8" but I get an error everytime. I'm not very good with ffmpeg so I'm not sure if I'm even able to use multi thread or not.

I am using a program called Pazera video to Flash.
http://www.pazera-software.com/products/video-to-flash-converter/

but anyway, does anyone know how to get multithread to work when converting avi's to flv's? I read some cases where people went from 40fps up to 150!

Thanks!

[Soopafresh]

try -threads 2

Also, certain versions of ffmpeg do not support multicore conversion to flv

[sp0oon]

Tried -threads 2 and I get an error. I will try using another version of ffmpeg.