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• The problem of code that generated typescript (node-fluent-ffmpeg module)

  10 décembre 2022, par Steve Rock

  This is my typescript code :

  



  import { NestFactory } from '@nestjs/core';
import { AppModule } from './app.module';
import { FfmpegCommand } from 'fluent-ffmpeg'

async function bootstrap() {
  const app = await NestFactory.create(AppModule);
  let test

  try {
    test = new FfmpegCommand('./adventure.mkv');
  } catch (error) {
    console.log(error);

  }

  await app.listen(3000);
}

bootstrap();


  



  Generated Javascript code :

  



  "use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
Object.defineProperty(exports, "__esModule", { value: true });
const core_1 = require("@nestjs/core");
const app_module_1 = require("./app.module");
const fluent_ffmpeg_1 = require("fluent-ffmpeg");
function bootstrap() {
    return __awaiter(this, void 0, void 0, function* () {
        const app = yield core_1.NestFactory.create(app_module_1.AppModule);
        let test;
        try {
            test = new fluent_ffmpeg_1.FfmpegCommand('./adventure.mkv');
        }
        catch (error) {
            console.log(error);
        }
        yield app.listen(3000);
    });
}
bootstrap();
//# sourceMappingURL=main.js.map


  



  When I run this application I've next error :

  



  main.ts:12
message :"fluent_ffmpeg_1.FfmpegCommand is not a constructor"
stack :"TypeError : fluent_ffmpeg_1.FfmpegCommand is not a constructor\n at c :\nest\dist\src\main.js:20:20\n at Generator.next ()\n at fulfilled (c :\nest\dist\src\main.js:5:58)\n at process._tickCallback (internal/process/next_tick.js:68:7)\n at Function.Module.runMain (internal/modules/cjs/loader.js:834:11)\n at startup (internal/bootstrap/node.js:283:19)\n at bootstrapNodeJSCore (internal/bootstrap/node.js:622:3)"

  



  That's beacause this raw test = new fluent_ffmpeg_1.FfmpegCommand('./adventure.mkv'). When I change this on just test = new fluent_ffmpeg_1('./adventure.mkv') I haven't the error. Do you know how to fix it. If you know where are ffmpeg exapmles on typescript please share with me :)

  


• FFmpeg : create data streams in MP4 container

  28 mars 2022, par Soeren

  Is there a way to make FFmpeg create data streams in MP4 or Quicktime (.mov) containers ? I have tried -attach ... (works fine for Matroska containers, but not MP4/MOV) or -codec bin_data, but to no avail.

  


  -attach ... technically creates streams with codec type "attachment", which are different from data streams. And while FFmpeg isn't smart enough to directly create data streams in containers where attachment streams aren't supported (ie. MP4), a two-step approach works :

  


  ffmpeg -i <some media="media" file="file"> -attach <some file="file"> -metadata:s:2 mimetype=<data mime="mime" type="type"> -map 0:v -map 0:a -codec copy attached.mkv&#xA;ffmpeg -i attached.mkv -codec copy attached.mp4&#xA;</data></some></some>

  


  The first command creates a Matroska file that contains a stream with codec_type=attachment. The second command then simply re-packages this into an MP4 container, turning the attachment stream into a data stream (codec_type=data). So the question is : could this be combined into a single step ?

  


• Is there any option to create a single frame thumbnail for a video in java ?

  13 juin 2020, par Prashanth Shyamprasad

  Is there any option to create a single frame thumbnail for a video in java with java libraries.

  



  I am using Jave2 in my application. Does Jave2 provides any such options ? I didn't find a single documentation related to this.

  



  I heard Xuggler provides some options. But I don't want to move to Xuggler if Jave2 provides the facility as I'm already using Jave2 for many purposes extensively. Adding a full library like Xuggler is an overhead. Replacing Jave2 with Xuggler also is a tedious task

  



  If any light weight thumbnail feature specific utility library is available, then that should also be fine.