Joseph cjdonato

About YUV formats

First of all: YUV pixel formats and Recommended 8-Bit YUV Formats for Video Rendering. Chromium's source code contains good documentation about those formats too: chromium/src/media/base/video_types.h and chromium/src/media/base/video_frame.cc (search for RequiresEvenSizeAllocation(), NumPlanes() and those kinds of functions).

YUV?

You can think of an image as a superposition of several planes (or layers in a more natural language). YUV formats have three planes: Y, U, and V.

Y is the luma plane, and can be seen as the image as grayscale. U and V are reffered to as the chroma planes, which are basically the colours. All the YUV formats have these three planes, and differ by the different orderings of them.

	#!/usr/bin/env bash


	if [ "$AWS_PROFILE" = "" ]; then
	echo "No AWS_PROFILE set"
	exit 1
	fi


	for region in $(aws ec2 describe-regions --region eu-west-1 \| jq -r .Regions[].RegionName); do

	global
	maxconn 16384
	log 127.0.0.1 len 8192 local0
	log-send-hostname
	chroot /var/lib/haproxy
	stats socket /run/haproxy/admin.sock mode 660 level admin expose-fd listeners
	stats timeout 30s
	user haproxy
	group haproxy
	daemon

	Encoder hevc_nvenc [NVIDIA NVENC hevc encoder]:
	General capabilities: dr1 delay hardware
	Threading capabilities: none
	Supported hardware devices: cuda cuda d3d11va d3d11va
	Supported pixel formats: yuv420p nv12 p010le yuv444p p016le yuv444p16le bgr0 bgra rgb0 rgba x2rgb10le x2bgr10le gbrp gbrp16le cuda d3d11
	hevc_nvenc AVOptions:
	-preset <int> E..V....... Set the encoding preset (from 0 to 18) (default p4)
	default 0 E..V.......
	slow 1 E..V....... hq 2 passes
	medium 2 E..V....... hq 1 pass

	AXIS_UP ignore
	AXIS_DOWN ignore
	AXIS_LEFT ignore
	AXIS_RIGHT ignore
	MOUSE_BTN3 add volume 5
	MOUSE_BTN4 add volume -5
	MOUSE_BTN5 seek -5
	MOUSE_BTN6 seek 5