GPGPU při enkódingu.

[DOC_ZENITH]

Hodně zajímavá recenze:

http://www.behardware.com/articles/828- ... -x264.html

Shrnující, že enkóding přes GPU je pořád, a to i přes to že už máme na trhu věci jako APU, v naprosto useless a mizerném stavu. Tomu řikam pokrok za ty 4 roky co o tom pořád slýcháme a ihmo skutek utek. Nejlépe tam dokonce zhodnotili dekóding přes Inteláckou grafiku v SB.... fakt špatné.

" In trying to sum up what AMD, NVIDIA and Intel are offering via these third party applications, we do owe it to ourselves to make a few remarks. Firstly, the AMD encoder is anything but stable. The applications that it was running in crashed on numerous occasions, something that we were able to reproduce when launching the AMD transcoding interface manually (you can access it via the CCC control panel). In limiting the encoder to the baseline profile here again, AMD isn‘t giving itself any real opportunity in terms of decent quality overall. This is particularly regrettable as in static scenes the quality is often pretty good. Implementing a high H.264 profile would be a good idea.

NVIDIA possibly has the most advanced SDK and its results are often the best when it comes to GPU acceleration. Nevertheless, the visual quality remains poor, to the point where the pure CPU solutions are often able to give an equivalent quality/encoding time ratio. What’s more, power consumption of these graphics cards is very high.

The Intel offer is the most surprising of the lot. The video encoding is managed by units added to the GPU which seem to accelerate a large part of the decoding. With very low CPU occupation, energy consumption is by far the lowest. In terms of issues with the Intel solution, you need to have an H67 or Z68 motherboard to run it, which greatly reduces the potential user base. Even if you do have one of these however, the visual quality of the encoded files frankly leaves too much to be desired for it to be really usable.

At the end of the day, the marketing promises in terms of GPGPU transcoding haven’t been kept. The manufacturers highlight the rapidity of their solutions as a solution to the very real problem of the excessive amount of time required for CPUs to encode video alone. By offering rapid encoding solutions, but with quality that leaves too much to be desired, H.264 encoding via GPGPU solutions remains, as yet, a poor solution to what is a real problem. "

[Hladis]

jj je to stale humac . Kazdopadne v dost pracovnich vecech CUDA pomaha tak aspon neco.