Shi Yan shi-yan

💭

keyboard smashing

shi-yan / subl

Created May 26, 2017 21:20

set subl command on Mac

/usr/local/bin/subl -> /Applications/Sublime Text.app/Contents/SharedSupport/bin/subl

shi-yan / mpegts

Last active February 10, 2017 00:02

ffmpeg cut video into mpegts

	ffmpeg -i 360.mp4 -bsf:v h264_mp4toannexb -f segment -segment_list_type m3u8 -segment_list playl -c copy -map 0 output02%d.ts

	ffmpeg -i result-%03d.png -c:v libx264 -vf fps=25 -pix_fmt yuv420p out.mp4

shi-yan / gist:6fa8aeea3d04f1b149f46ff725408d28

Last active January 14, 2017 21:46 — forked from giosakti/gist:3027026

[Git] Fetch & merge upstream/downstream repo

	downstream github

	git remote add <upstream>/<repo> ssh://[email protected]/<upstream>/<repo>.git
	git fetch <upstream>/<repo>
	git checkout master
	git merge remotes/<upstream>/<repo>/master


	sync submodules
	git submodule update --init --recursive

shi-yan / tricks

Last active October 25, 2016 19:23

Useful tricks

	check symbol:
	http://stackoverflow.com/questions/34732/how-do-i-list-the-symbols-in-a-so-file
	nm -g yourLib.so
	nm -gC yourLib.so

	debug dlopen
	http://stackoverflow.com/questions/34415168/dlopen-returns-with-file-not-found-although-file-exist
	export LD_DEBUG=all

	let gdb break into a program with ctrl-c

shi-yan / caffe_build

Created October 12, 2016 03:24

Build Caffe on Ubuntu 16 with Cuda 8

	Building Caffe on Ubuntu 16 with Cuda 8.0 wasn't smooth for me.

	I googled, many people saw the same problem. I want to briefly document what I did to build Caffe.

	symptoms, you might see errors like this, this is because of gcc 5.

	a new feature added to gcc5 called abi_tag will cause problems like this:

	https://gcc.gnu.org/onlinedocs/gcc/C_002b_002b-Attributes.html

shi-yan / Crunchy apple chips

Last active January 7, 2016 19:07

	X: 1
	T: Crunchy Crunchy Apple Chips
	M: 4/4
	L: 1/8
	Q:1/4=180
	K:D % 2 sharps
	C:Stewie Yan
	O:San Jose CA
	N:Generated with AI
	df df Af e2\| \

shi-yan / chromium_with_h264

Created March 27, 2015 21:51

build chromium with h264 codec

	chromium/src$ export GYP_DEFINES="proprietary_codecs=1 ffmpeg_branding=Chrome"
	chromium/src$ build/gyp_chromium

shi-yan / SYMOPT_LOAD_ANYTHING

Created December 3, 2014 23:55

Force loading debug symbols with windbg

	Force loading debug symbols (for example, mismatched simbols) with windbg:

	.symopt+0x40

	This command enables SYMOPT_LOAD_ANYTHING option.

	Details are here: http://seclib.blogspot.com/2005/07/force-windbg-to-load-symbols.html

shi-yan / sawp_keys

Created November 4, 2014 05:25

Swap the Ctrl and the Windows key under ubuntu

	I'm so used to Mac key mapping that I want to use the windows key as the ctrl, and the ctrl as the windows key.

	I found a very useful link here:
	http://stackoverflow.com/questions/21845209/remap-ctrl-alt-super-keys-in-ubuntu-13-10

	first run this to generate the keymap
	xmodmap -pke > ~/.Xmodmap.

	open .Xmodmap file, add these at the beginning:
	clear control

shi-yan / build_webrtc

Last active August 29, 2015 14:08

Build native webrtc project

	The webrtc build instruction is very shitty in my opinion. It has way too much confusing information that is unrelated to webrtc.

	here are the steps I went through to build it on ubuntu:

	1. install tools:
	git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git
	$ export PATH=`pwd`/depot_tools:"$PATH"

	2. sync code:
	gclient config --name src http://webrtc.googlecode.com/svn/trunk