[FFmpeg-devel] PR new filter gltransition

Paul B Mahol onemda at gmail.com
Fri Dec 29 10:24:22 EET 2017

On 12/29/17, Rostislav Pehlivanov <atomnuker at gmail.com> wrote:
> On 27 December 2017 at 23:13, Travis Fischer <fisch0920 at gmail.com> wrote:
>> Hello,
>> This is my first time contributing to ffmpeg, so please go easy on me :)
>> I have a git diff here
>> <https://github.com/transitive-bullshit/ffmpeg-gl-transition> which add a
>> new filter to apply a GLSL transition between two video streams.  The
>> github repo for this patch includes all of the relevant documentation and
>> usage examples.
>> (sorry, I'm not sure how to formally define the patch, as I'm used to just
>> submitting PRs on github)
>> I created this filter because of my frustration with how difficult and
>> limited the *transition* possibilities were with current concat filter
>> chains. Anything aside from basic video cross-fades isn't really possible.
>> After releasing the filter as a standalone extension and seeing some other
>> devs adopt it, I received a lot of feedback that this functionality should
>> be merged info ffmpeg, so I wanted to get the ball rolling and see what
>> everyone thinks on this list.
>> Thanks!
>> -- Travis Fischer <https://github.com/transitive-bullshit>
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> I don't see the point of such a filter. Redundant. We already have a
> properly implemented OpenCL filter support (and there's a patch to make it
> accept generic kernels). This is a quick hack which requires 2 copies and
> that's slow and inefficient.
> Instead, how about a tutorial on how to convert glsl to opencl kernels?

Current OpenCL filters are neither generic nor use framesync.

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