Build VAAPI with support for VP8/9 decode and encode hardware acceleration on a Skylake validation testbed:
Build platform: Ubuntu 16.04LTS.
First things first:
Install baseline dependencies first
sudo apt-get -y install autoconf automake build-essential libass-dev libtool pkg-config texinfo zlib1g-dev libva-dev cmake mercurial libdrm-dev libvorbis-dev libogg-dev git libx11-dev libperl-dev libpciaccess-dev libpciaccess0 xorg-dev intel-gpu-tools
| # ======================================================== | |
| # Setup a Dumb AP, Wired backbone for OpenWRT / LEDE | |
| # ======================================================== | |
| # Set lan logical interface as bridge (to allow bridge multiple physical interfaces) | |
| uci set network.lan.type='bridge' | |
| # assign WAN physical interface to LAN (will be available as an additional LAN port now) | |
| uci set network.lan.ifname="$(uci get network.lan.ifname) $(uci get network.wan.ifname)" | |
| uci del network.wan.ifname | |
| # Remove wan logical interface, since we will not need it. | |
| uci del network.wan |
Streaming your Linux desktop to Youtube and Twitch via Nvidia's NVENC and VAAPI:
Considerations to take when live streaming:
The following best practice observations apply when using a hardware-based encoder for live streaming to any platform:
Set the buffer size (-bufsize:v) equal to the target bitrate (-b:v). You want to ensure that you're encoding in CBR mode.
Set up the encoders as shown:
| #!/usr/bin/env python | |
| """ | |
| Runs "ip xfrm state" and outputs lines to be added to ~/.wireshark/esp_sa | |
| This process must be run using sudo. | |
| This allows Wireshark to decrypt ipsec traffic captured with 'sudo tcpdump -vni any -U -w /tmp/esp.pcap "ip proto 50"' | |
| """ | |
| import sys | |
| import subprocess |
Examples here use the default settings, see the VidStab readme on GitHub for more advanced instructions.
Here's an example video I made
brew install ffmpeg --with-libvidstab
| /* | |
| * Simple printf for writing to an Arduino serial port. Allows specifying Serial..Serial3. | |
| * | |
| * const HardwareSerial&, the serial port to use (Serial..Serial3) | |
| * const char* fmt, the formatting string followed by the data to be formatted | |
| * | |
| * int d = 65; | |
| * float f = 123.4567; | |
| * char* str = "Hello"; | |
| * serial_printf(Serial, "<fmt>", d); |
| # input: fullchain.pem and privkey.pem as generated by the "letsencrypt-auto" script when run with | |
| # the "auth" aka "certonly" subcommand | |
| # convert certificate chain + private key to the PKCS#12 file format | |
| openssl pkcs12 -export -out keystore.pkcs12 -in fullchain.pem -inkey privkey.pem | |
| # convert PKCS#12 file into Java keystore format | |
| keytool -importkeystore -srckeystore keystore.pkcs12 -srcstoretype PKCS12 -destkeystore keystore.jks | |
| # don't need the PKCS#12 file anymore |
| #!ipxe | |
| dhcp | |
| echo Starting Ubuntu x64 installer for ${hostname} | |
| set base-url http://archive.ubuntu.com/ubuntu/dists/lucid/main/installer-amd64/current/images/netboot/ubuntu-installer/amd64 | |
| kernel ${base-url}/linux | |
| initrd ${base-url}/initrd.gz | |
| #imgargs linux auto=true url=http://yourserver/some/path/preseed.cfg | |
| boot || | |
| # If everything failed, give the user some options | |
| echo Boot from ${base-url} failed |