https://nervous.io/ffmpeg/opengl/2017/01/31/ffmpeg-opengl,Applying OpenGL Shaders with FFmpeg,https://github.com/transitive-bullshit/awesome-ffmpeg#readme,FFmpeg error: <HTTPError 403: 'Forbidden'> | reason: Forbidden
https://nervous.io/ffmpeg/opengl/2017/05/15/ffmpeg-pbo-yuv,follow-up,https://github.com/transitive-bullshit/awesome-ffmpeg#readme,FFmpeg error: <HTTPError 403: 'Forbidden'> | reason: Forbidden