tzutalin

使用ffmpeg合并MP4文件

ffmpeg -i "Apache Sqoop Tutorial Part 1.mp4" -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate1.ts
ffmpeg -i "Apache Sqoop Tutorial Part 2.mp4" -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate2.ts
ffmpeg -i "Apache Sqoop Tutorial Part 3.mp4" -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate3.ts
ffmpeg -i "Apache Sqoop Tutorial Part 4.mp4" -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate4.ts
ffmpeg -i "concat:intermediate1.ts|intermediate2.ts|intermediate3.ts|intermediate4.ts" -c copy -bsf:a aac_adtstoasc "Apache Sqoop Tutorial.mp4"

tzutalin

design

Requests are handled by flask, a bunch of urls are inserted in the object store (redis) and arguments are put on the queue (redis again) for workers to consume. More workers would mean more items processed in parallel.

Other possible implementations:

• multiprocessing module for consuming all cpus.
• multiprocessing.managers.SyncManager for distributing task to other machines.

tzutalin

#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/sem.h>
#include <unistd.h>
#include <sys/types.h>

tzutalin

#!/usr/bin/env sh
# Clone Boost.Compute-Android
git clone --recursive https://github.com/tzutalin/Boost.Compute-Android
# Download NDK
wget https://dl.google.com/android/ndk/android-ndk-r10e-linux-x86_64.bin
chmod +x android-ndk-r10e-linux-x86_64.bin
./android-ndk-r10e-linux-x86_64.bin 1> /dev/null 2>&1
mv android-ndk-r10e android-ndk
export PATH=`pwd`/android-ndk:$PATH

tzutalin

#!/usr/bin/env python
__author__ = 'TzuTaLin'

# Copyright (c) 2016 Tzutalin
# Create by TzuTaLin <tzu.ta.lin@gmail.com>

import os
import platform
import subprocess

tzutalin

#!/bin/sh
git remote add upstream $1
git fetch upstream
git pull --rebase upstream master

tzutalin

#! /bin/bash
#
# This file is part of keytool-importkeypair.
#
# keytool-importkeypair is free software: you can redistribute it
# and/or modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation, either version 3 of
# the License, or (at your option) any later version.
#
# keytool-importkeypair is distributed in the hope that it will be

tzutalin

#!/usr/bin/env sh
NDK_ROOT="${1:-${NDK_ROOT}}"

if [ ! -d "${WD}/android-cmake" ]; then
    echo 'Cloning android-cmake'
    git clone https://github.com/taka-no-me/android-cmake.git
fi

### ABI setup
#ANDROID_ABI=${ANDROID_ABI:-"armeabi-v7a with NEON"}

tzutalin

DIR=.
VERSION=12

echo "Downloading headers for version ${VERSION}..."

mkdir -p "${DIR}/CL-${VERSION}"
cd "${DIR}/CL-${VERSION}"

wget https://raw.githubusercontent.com/KhronosGroup/OpenCL-Headers/opencl${VERSION}/opencl.h

tzutalin

#include <iostream>
#include <ctime>

class Timer
{
public:
    Timer() { clock_gettime(CLOCK_REALTIME, &beg_); }

    double elapsed() {
        clock_gettime(CLOCK_REALTIME, &end_);