FFmpeg 4.0 Released With New Encoders/Decoders, NVIDIA NVDEC Decoding

[phoronix]

Phoronix: FFmpeg 4.0 Released With New Encoders/Decoders, NVIDIA NVDEC Decoding

FFmpeg 4.0 is now available as the latest major release for this widely-used open-source multimedia encode/decoder library...

http://www.phoronix.com/scan.php?page=news_item&px=FFmpeg-4.0-Released

[SyXbiT]

>>NVIDIA NVDEC GPU-based decoding for H264 / MJPEG / HEVC / MPEG-1/2/4, VC1, VP8, and VP9 formats.
This is excellent news. Just waiting for mpv to get released

[cl333r]

>>NVIDIA NVDEC GPU-based decoding for H264 / MJPEG / HEVC / MPEG-1/2/4, VC1, VP8, and VP9 formats.
This is excellent news. Just waiting for mpv to get released

I'm using an mpv ppa and nvdec already works, mpv.conf (which is at $home/.config/mpv/) needs:
vo=gpu
hwdec=nvdec

[Aleksei]

What's the word on AMD (amdgpu) video decoding?

I'm using an mpv ppa and nvdec already works, mpv.conf (which is at $home/.config/mpv/) needs:
vo=gpu
hwdec=nvdec

Question: how do you check that HW decoding actually happens?

[nanonyme]

What's the word on AMD (amdgpu) video decoding?


Question: how do you check that HW decoding actually happens?

Already exists with OpenMAX, VDPAU and VAAPI. nVidia apparently noticed they were losing the battle so this latest nvdec attempt is designed to assume CUDA to be as badly incompatible with competitor hardware (and nouveau) as possible

[defaultUser]

What's the word on AMD (amdgpu) video decoding?


Question: how do you check that HW decoding actually happens?

For the nvidia decoding. Its possible to use the nvidia-smi utiliy. It will show something like that "C+G" on the column, indicating both a render and computation job

[Brisse]

What's the word on AMD (amdgpu) video decoding?


Question: how do you check that HW decoding actually happens?

Just run mpv from the terminal. The output makes it pretty obvious if HW decoding is used or not. For AMD just use 'hwdec' or 'hwdec=auto' to have mpv automatically pick the best method. It will probably be 'hwdec=vdpau' unless you are on Wayland, in which case only 'hwdec=vaapi-copy' works. Also, mpv on Wayland needs 'opengl-backend=wayland'.

Here's how my config looks for my AMD system:
hwdec=vaapi-copy
profile=opengl-hq
#opengl-backend=wayland

Last option commented out because I'm currently not using Wayland.

[geearf]

What's the word on AMD (amdgpu) video decoding?


Question: how do you check that HW decoding actually happens?

Look at your CPU usage with it off and on, if one is high and one is low, then you know it is working.

[cl333r]

What's the word on AMD (amdgpu) video decoding?


Question: how do you check that HW decoding actually happens?

Play a hi-res movie with mpv with nvdec disabled and enabled and see at the difference of mpv's CPU usage in each case using "top" from the terminal. In my case the CPU drops from like 60% to like 6%.

[Aleksei]

Just run mpv from the terminal. The output makes it pretty obvious if HW decoding is used or not.

Thanks.

[vd] Using hardware decoding (vdpau).

Here's how my config looks for my AMD system:
hwdec=vaapi-copy
profile=opengl-hq
#opengl-backend=wayland
Last option commented out because I'm currently not using Wayland.

You can also do "opengl-backend=wayland, auto" - that's what I have. It tries to use wayland, fails and then looks for best available option.

Look at your CPU usage with it off and on, if one is high and one is low, then you know it is working.

Cool, mpv uses 40-50% CPU with SW decoding for a 1080p and only 14-15% with HW decoding.