X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=README;h=bc6a5a87a58e80c0ab4821888cfa6643d5f2d2e4;hp=e738f7f4207f8aa868bb706addb7259690fc1dfa;hb=90ac46cdc5845432df13385f946c63b5496c685e;hpb=d843bbc41c20e1f0abe25df5162423270af78896 diff --git a/README b/README index e738f7f..bc6a5a8 100644 --- a/README +++ b/README @@ -20,13 +20,11 @@ OK, you need * A C++98 compiler. GCC will do. (I haven't tried Windows, but it works fine on Linux and OS X, and Movit is not very POSIX-bound.) * GNU Make. -* A GPU capable of running GLSL fragment shaders, - process floating-point textures, and a few other things. If your machine - is less than five years old _and you have the appropriate drivers_, - you're home free. -* The [Eigen 3] and [Google Test] libraries. (The library itself - depends only on the former, but you probably want to run the unit tests.) -* The [GLEW] library, for dealing with OpenGL extensions on various +* A GPU capable of running OpenGL 3.0 or newer. GLES3 (for mobile devices) + will also work. +* The [Eigen 3], [FFTW3] and [Google Test] libraries. (The library itself + does not depend on the latter, but you probably want to run the unit tests.) +* The [epoxy] library, for dealing with OpenGL extensions on various platforms. Movit has been tested with Intel GPUs with the Mesa drivers @@ -43,10 +41,10 @@ Blur, diffusion, FFT-based convolution, glow, lift/gamma/gain (color correction), mirror, mix (add two inputs), luma mix (use a map to wipe between two inputs), overlay (the Porter-Duff “over” operation), scale (bilinear and Lanczos), sharpen (both by unsharp mask and by Wiener filters), saturation -(or desaturation), vignette, and white balance. +(or desaturation), vignette, white balance, and a deinterlacer (YADIF). Yes, that's a short list. But they all look great, are fast and don't give -you any nasty surprises. (I'd love to include denoise, deinterlace and +you any nasty surprises. (I'd love to include denoise and framerate up-/downconversion to the list, but doing them well are all research-grade problems, and Movit is currently not there.) @@ -54,7 +52,8 @@ all research-grade problems, and Movit is currently not there.) TL;DR, but I am interested in a programming example instead =========================================================== -Assuming you have an OpenGL context already set up: +Assuming you have an OpenGL context already set up (either a classic OpenGL +context, a GL 3.x forward-compatible or core context, or a GLES3 context): using namespace movit; @@ -90,16 +89,17 @@ OK, I can read a bit. What do you mean by “modern”? Backwards compatibility is fine and all, but sometimes we can do better by observing that the world has moved on. In particular: -* It's 2014, so people want to edit HD video. -* It's 2014, so everybody has a GPU. -* It's 2014, so everybody has a working C++ compiler. +* It's 2017, so people want to edit HD video. +* It's 2017, so everybody has a GPU. +* It's 2017, so everybody has a working C++ compiler. (Even Microsoft fixed theirs around 2003!) -While from a programming standpoint I'd love to say that it's 2014 +While from a programming standpoint I'd love to say that it's 2016 and interlacing does no longer exist, but that's not true (and interlacing, hated as it might be, is actually a useful and underrated technique for -bandwidth reduction in broadcast video). Movit will eventually provide -limited support for working with interlaced video, but currently does not. +bandwidth reduction in broadcast video). Movit may eventually provide +limited support for working with interlaced video; it has a deinterlacer, +but cannot currently process video in interlaced form. What do you mean by “high-performance”? @@ -124,9 +124,9 @@ decoding. Exactly what speeds you can expect is of course highly dependent on your GPU and the exact filter chain you are running. As a rule of thumb, you can run a reasonable filter chain (a lift/gamma/gain operation, -a bit of diffusion, maybe a vignette) at 720p in around 30 fps on a two-year-old +a bit of diffusion, maybe a vignette) at 720p in around 30 fps on a four-year-old Intel laptop. If you have a somewhat newer Intel card, you can do 1080p -video without much problems. And on a mid-range nVidia card of today +video without much problems. And on a low-range nVidia card of today (GTX 550 Ti), you can probably process 4K movies directly.