152 lines
3.4 KiB
TypeScript
152 lines
3.4 KiB
TypeScript
'use strict';
|
|
|
|
/** @module FFPROBE **/
|
|
|
|
import { exists } from 'fs-extra';
|
|
import { extname } from 'path';
|
|
import { exec } from 'exec';
|
|
//const spawn = require('spawn');
|
|
//const exit = require('exit');
|
|
|
|
class FFPROBE {
|
|
private bin : string;
|
|
private log : any;
|
|
constructor (sys : any) {
|
|
this.bin = sys.deps.ffprobe;
|
|
}
|
|
|
|
/**
|
|
* Parse the fps entry into a float representing the fps of a video
|
|
**/
|
|
private parseFps (fpsStr : string) {
|
|
let fps : number = 30.0;
|
|
let parts : string[];
|
|
if (fpsStr.indexOf('/') !== -1) {
|
|
parts = fpsStr.split('/');
|
|
fps = parseFloat(parts[0]) / parseFloat(parts[1]);
|
|
} else {
|
|
fps = parseFloat(fpsStr);
|
|
}
|
|
return fps
|
|
}
|
|
/**
|
|
* Get info on a video in json format. Use for filmout.
|
|
*
|
|
* @param {string} video Path to video
|
|
*
|
|
* @returns {object} Video info in an object
|
|
**/
|
|
public async info (video : string) {
|
|
const cmd : string = `${this.bin} -v quiet -print_format json -show_format -show_streams "${video}"`
|
|
let fileExists : boolean;
|
|
let raw : any;
|
|
let json : any;
|
|
let vid : any; //whether video has stream with video data
|
|
|
|
try {
|
|
fileExists = await exists(video);
|
|
} catch (err) {
|
|
return exit(err, 5);
|
|
}
|
|
if (!fileExists) {
|
|
//return exit(`File ${video} does not exist`, 6);
|
|
console.error(new Error(`File ${video} does not exist`));
|
|
return false
|
|
}
|
|
|
|
try {
|
|
console.log(cmd);
|
|
raw = await exec(cmd);
|
|
} catch (err) {
|
|
//return exit(err, 7);
|
|
console.error(err);
|
|
return false
|
|
}
|
|
|
|
try {
|
|
json = JSON.parse(raw.stdout);
|
|
} catch (err) {
|
|
return raw.stdout;
|
|
}
|
|
|
|
if (json.format && json.format.duration) {
|
|
json.seconds = parseFloat(json.format.duration);
|
|
}
|
|
|
|
if (json && json.streams) {
|
|
vid = json.streams.find((stream : any) => {
|
|
if (stream.width && stream.height) return stream;
|
|
});
|
|
}
|
|
|
|
if (vid) {
|
|
json.width = vid.width;
|
|
json.height = vid.height;
|
|
json.fps = this.parseFps(vid.r_frame_rate)
|
|
}
|
|
|
|
return json;
|
|
}
|
|
/**
|
|
* Count the number of frames in the video using one of two methods.
|
|
* The first uses -select_streams and is very fast. The second uses
|
|
* -count_frames and is VERY slow.
|
|
*
|
|
* @param {string} video Path to video
|
|
*
|
|
* @returns {integer} Number of frames in video
|
|
**/
|
|
public async frames (video : string) {
|
|
const ext : string = extname(video.toLowerCase());
|
|
let cmd : string = `${this.bin} -v error -select_streams v:0 -show_entries stream=nb_frames -of default=nokey=1:noprint_wrappers=1 "${video}"`;
|
|
let backup_cmd : string = `${this.bin} -v error -count_frames -select_streams v:0 -show_entries stream=nb_read_frames -of default=nokey=1:noprint_wrappers=1 "${video}"`;
|
|
let gif_cmd : string = `identify -format "%n\n" "${video}" | head -1`
|
|
let fileExists : boolean;
|
|
let raw : any;
|
|
let frames : number;
|
|
|
|
try {
|
|
fileExists = await exists(video);
|
|
} catch (err) {
|
|
//return exit(err, 5);
|
|
console.error(err);
|
|
return false
|
|
}
|
|
if (!fileExists) {
|
|
//return exit(`File ${video} does not exist`, 6);
|
|
console.error(new Error(`File ${video} does not exist`));
|
|
return false;
|
|
}
|
|
|
|
if (ext === '.mkv') {
|
|
cmd = backup_cmd;
|
|
} else if (ext === '.gif') {
|
|
cmd = gif_cmd;
|
|
}
|
|
try {
|
|
console.log(cmd);
|
|
raw = await exec(cmd);
|
|
} catch (err) {
|
|
console.error(err);
|
|
return false;
|
|
}
|
|
|
|
try {
|
|
frames = parseInt(raw.stdout);
|
|
} catch (err) {
|
|
return raw.stdout;
|
|
}
|
|
|
|
return frames;
|
|
}
|
|
}
|
|
|
|
/*
|
|
function map (obj : any) {
|
|
console.dir(obj);
|
|
}
|
|
*/
|
|
|
|
module.exports = (sys : any) => {
|
|
return new FFPROBE(sys);
|
|
} |