Fornax96

package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
	"strings"
)

Fornax96

package main

import (
	"context"
	"fmt"
	"net"
	"net/http"
	"os"
	"os/exec"
	"os/signal"

Fornax96

package util

// ExecutionLimiter is a utility which limits the concurrent execution of a
// function. When it is initialized it creates a channel with x capacity and
// fills it with x booleans. Every time the Lock() function is called a bool is
// removed from the channel. When the channel is empty the function will block
// until the Unlock function is called, which puts a new bool into the channel.
type ExecutionLimiter struct {
	channel chan bool
}

Fornax96

Keybase proof

I hereby claim:

• I am fornax96 on github.
• I am fornax96 (https://keybase.io/fornax96) on keybase.
• I have a public key ASAg6qRo5dRf-RB5DYxujXaF40NXIU96BYzafs1f3a37eAo

To claim this, I am signing this object:

Fornax96

func videoThumbnail(ps *pixelstore.PixelStore, sourceFile pixelstore.FileID) (image.Image, error) {
	// To generate thumbnails from video files we use FFMPEG. One challenge is
	// that FFMPEG needs to seek to the end of the video to decode the stream
	// metadata. Saving the whole file to disk would be inefficient. Luckily
	// FFMPEG supports reading (and seeking) videos over HTTP. Here we start a
	// HTTP server on a random TCP port, then the address of the listener is
	// given to FFMPEG to read the file from. When FFMPEG exits we shut down the
	// listener and the HTTP server. The resulting thumbnail image is piped to
	// stdout and saved in a buffer. The buffer is then decoded and returned
	// from the function