Originally posted by Hiryuu

---

Comes with GPU encoding now.

---

Pretty nifty, but it looks like the way they do it has the video card sending decompressed frames back to the CPU. (It also isn't supported in Windows XP, but that's not surprising.)

____________________

Originally posted by paulguy

---

but very possible that they do have GPGPU based encoders

using multiple cores with x264 hurts compression ratio

who knows what effect GPGPU might have

real time encoding at all costs for streaming or something

---

There are no open-source GPU encoders.

Not by any amount you'd notice if you weren't looking for it, and adding --non-deterministic to the command line decreases that amount. (Or run multiple instances limited to one thread each, if you're encoding multiple videos.)

GPGPU is quite a bit different than simply throwing more CPU cores at the same task. All GPUs are designed to perform the same calculations at the same time (on different data) within groups of cores, so it's nearly useless for anything that cannot be done in parallel. Taking into consideration the relative slowness* between the CPU and GPU, this leaves very little that the GPU could do better.

CPU encoding is faster, and x264 already can do this.


So can you guess what I read about in my free time?

*I blame my sister for my use of this word.

____________________