[FFmpeg-user] Is libplacebo only for GPUs?

[Mark Filipak]

On 15/05/2025 18.48, Ferdi Scholten wrote:
>> пт, 16 мая 2025 г., 00:12 Mark Filipak<markfilipak.imdb at gmail.com>:
>>
>>> On 15/05/2025 16.44, Carl Zwanzig wrote:
>>>> On 5/15/2025 1:33 PM, Mark Filipak wrote:
>>>>> What if I don't have a GPU?
>>>> Then you have a 25+ year old video card?
>>> Laptop
>>>
>>>> AFAIK all video chips for the last few decades have had
>>>> some form of GPU, although it may not be that useful or not accessible
>>> for offload processing.
>>>
>>> FFmpeg says, "using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX"
>>> I guess "AVX" is a GPU? I have no idea.
>>>
>> no, just another cpu SIMD extension ....
>>
>> but llvmpipe/lavapipe (software Vulkan rasterizer) probably can use it.
>>
>>
>>
>>>> A better question might be "What if I don't have a supported GPU?"
>>> It's not a _better_ question, Carl, it's the _next_ question.
>>>
>>>
> Does anyone ever care to read documentation?

Sure. Here: https://ffmpeg.org/ffmpeg-filters.html#libplacebo

> 
> libplacebo currently supports Vulkan (including MoltenVK), OpenGL, and Direct3D 11. It currently has 
> the following minimum hardware requirements:
> 
>   * *Vulkan*: Core version 1.2
>   * *OpenGL*: GLSL version >= 130 (GL >= 3.0, GL ES >= 3.0)
>   * *Direct3D*: Feature level >= 9_1

Where did you find that text? Should I be looking somewhere else for documentation?

> Otherwise, if you have a laptop that was produced after 2010 its hardware almost certainly supports 
> libplacebo in some way as the oldest of the hardware requirements being OpenGL 3.0 was supported by 
> almost all video devices (either dedicated or built in the processor) of the time. OpenGL 3.0 was 
> released in 2008.

I run FFmpeg in Windows.

> The same if you are on Windows, Direct3D Feature level 9_1 was released in 2008

Intel Graphic and Media Control Panel makes no mention of Direct3D. I believe that Direct3D is from 
Microsoft.

> Vulkan is much more recent, version 1.2 is from 2020
> 
> In other words for Intel based laptops, everything going back to Sandy Bridge has hardware support 
> for libplacebo and for AMD based this goes back to the K10 series processors.
> 
>  From the documentation:
> "
> In principle, libplacebo has no mandatory dependencies - only optional ones. However, to get a 
> useful version of libplacebo. you most likely want to build with ...

Build? Come down to Earth, friend. And again, where are you finding your documentation?

> For sure, running FFmpeg with libplacebo on Sandy Bridge hardware won't be fast at all. But it will 
> make use of hardware acceleration via OpenGL ( or DirectX if you use Windows < 10 )

Windows 7x64 SP1. Yeah, I know... but my Acer gaming laptop with NVIDIA died.

Thank you. Then I'll put some time into using libplacebo's 'tonemapping' 
(https://ffmpeg.org/ffmpeg-filters.html#Tone-mapping) in addition to 'tonemap' 
(https://ffmpeg.org/ffmpeg-filters.html#tonemap-1). I've been at this for two days.