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Hardware Acceleration (lemmy.dbzer0.com)

submitted 6 days ago by [email protected] to c/[email protected]

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I've pirated every video converter known to man (UniConverter, WinX, VideoProc, Aiseesoft, Tipard, etc) & even tried open source tools like ffmpeg and handbrake and I can't get hardware acceleration to work unless I just don't understand how it's supposed to work. I have a Radeon (TM) RX 470 graphics card and plenty of processing power.

An example is when I attempt to convert a video to HEVC and don't use acceleration, I can get like 100 FPS and 2-3 mins rendering time but all my CPUs go to over 100%.

However, when I turn on acceleration or use the AMD HEVC Encoder (ffmpeg, handbrake), the FPS rate drops to like 10-15 FPS, the CPUs barely go over 10% and the GPU then jumps to over 100% which is fine but then it tells me it'll take like 20 mins to render a 20 mins tv episode!?!?

This is driving me crazy. Can someone provide some insight on this? I'd be forever grateful. Thanks!

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[–] [email protected] 9 points 6 days ago (1 children)

We need more detailed information, what codec you want do encode in, what’s the settings to the encoder, what type of input file etc. And since you use windows it would be nice to check if you use the 3D accelerator or the Encoder. This is easy shown in the taskmanager, when you encode in hardware the hardware encoder should show usage. For me I use both intels quicksync aswell as nvidias nvec for encoding and never had any issue so it just might be an AMD issue or your specific GPU may be faulty-or driver issue.

[–] [email protected] 3 points 6 days ago (1 children)

Sorry, I'll try to be a bit clearer here. I have an MKV (h.264, aac, ass soft sub) file 1920x1080 16:9 I want to re-encode with HEVC reducing it to a 640x360 while retaining the soft subs. Actually, I would like to burn in the soft subs but it keeps defaulting to the programs standard font instead of using the soft subs styles. I use HWMonitor when checking the various softwares so I can see how much CPU or GPU usage is going on. I'm wondering if it's just a freaking AMD issue. I HATE so bad I didn't get an Intel or Nvidia graphics card when I had my system rebuilt. Anyway, I hope this provides a bit more clarity. Feel free to ask anything else as I'm just basically going around in circles right now. Thanks so much for your input!

[–] [email protected] 4 points 5 days ago

thats the issue, downscaling. when I downscale 4K to HD it takes about 45min for a 2h film, when I keep the resolution its like 5min.