Nativescript FFmpeg

A Nativescript wrapper for the FFmpeg library. (ONLY SUPPORTS ANDROID)

Installation

Run the following command from the root of your project:

tns plugin add nativescript-ffmpeg

This command automatically installs the necessary files, as well as stores nativescript-ffmpeg as a dependency in your project's package.json file.

API

Static Functions

Function	Description
execute(command: string | Array<string>, callback?: Callback, debug?: boolean): void	Executes a FFmpeg command. The second argument is an optional callback function (which only returns an error message). If you choose to enable the debug flag, the third argument should be set as true and the function will log all events during execution of the commang.

Usage

import { Component, OnInit } from "@angular/core";
import { FFmpeg } from "nativescript-ffmpeg";
import { VideoRecorder } from "nativescript-videorecorder";
import * as Permissions from "nativescript-permissions";
import { isAndroid } from "tns-core-modules/platform";
import * as dialogs from "tns-core-modules/ui/dialogs";


declare const android: any;

@Component({
  selector: "Home",
  moduleId: module.id,
  templateUrl: "./home.component.html"
})
export class HomeComponent implements OnInit {
  private _recorder = new VideoRecorder({
    format: "mp4",
    saveToGallery: true,
    hd: true,
    explanation: "We need to be able to record video"
  });

  constructor() {
  }

  ngOnInit(): void {
  }

  private _compress(src: string): void {
    const out = src.replace(/\.[^/.]+$/, "_COMPRESSED.mp4");
    FFmpeg.execute(["-i", src, "-vcodec", "h264", "-acodec", "mp3", out], (err: string) => {
      if (err) {
        this._error(err);
      } else {
        console.log("Compressed file size " + this._getSize(out));
      }
    });
  }

  private _error(error: string | Error): Promise<void> {
    return dialogs.alert({
      title: "Uh oh...",
      message: (error instanceof Error) ? error.message : error,
      okButtonText: "OK, got it"
    });
  }

  private _getSize(path: string): string {
    let length: number = 0;
    if (isAndroid) {
      const file = new java.io.File(path);
      length = file.length();
    } else {
      const defManager = NSFileManager.defaultManager;
      const fileAttributes = defManager.attributesOfItemAtPathError(path);
      length = fileAttributes.objectForKey(NSFileSize);
    }
    return `${(length / (1000 * 1000)).toFixed(2)} MB`;
  }

  private _takeVideo(): void {
    this._recorder.record()
      .then((data) => {
        console.log("Original file size " + this._getSize(data.file));
        this._compress(data.file);
      })
      .catch((error) => { if (error.event !== "cancelled") { this._error("Couldn't record your video"); } });
  }

  public takeVideo(): void {
    if (isAndroid) {
      Permissions.requestPermission([android.Manifest.permission.RECORD_AUDIO, android.Manifest.permission.CAMERA],
        "Demo needs Audio and Camera permissions to record a video")
        .then(() => {
          this._takeVideo();
        }, (error) => this._error("Demo needs Audio and Camera permissions to record a video"));
    } else {
      this._takeVideo();
    }
  }
}

License

Apache License Version 2.0, January 2004