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• download and fill file on fly

  4 mai 2017, par Gianluca Calabria

  I’m trying to create a service for a client which takes some audio chunks and concatenate them. For this I’m using FFmpeg. The user should also be able to download the result on the fly without waiting for the conversion/concatenation to finish. The idea is to "fill" the file as the process goes on. I cannot work my way around it, is it possible to do ? I’m using a RESTful service which calls a class like this one

  public ReadableRepresentation serveDownloadRequest(Representation entity) throws SystemInitializationException {
  
      InputStreamChannel inputStreamChannel;
  
      Form reqParameters=getQuery();
  
      try {
  
  
  
          String parameters = readStringParameter(reqParameters, AudioCutAndJoinParameters.PARAMETERS, AudioCutAndJoinParameters.PARAMETERS_MANDATORY);
  
          trace.debug(this.getClass().getSimpleName() + " parameter " + AudioCutAndJoinParameters.PARAMETERS + "=" + parameters);
  
  
  
          String inputUri = readStringParameter(reqParameters, AudioCutAndJoinParameters.INPUT_URI, AudioCutAndJoinParameters.INPUT_URI_MANDATORY);
  
          trace.debug(this.getClass().getSimpleName() + " parameter " + AudioCutAndJoinParameters.INPUT_URI + "=" + inputUri);
  
  
  
          String markInRelative = readStringParameter(reqParameters, AudioCutAndJoinParameters.MARKIN_ID_RELATIVE, AudioCutAndJoinParameters.MARKIN_ID_RELATIVE_MANDATORY);
  
          trace.debug(this.getClass().getSimpleName() + " parameter " + AudioCutAndJoinParameters.MARKIN_ID_RELATIVE + "=" + markInRelative);
  
  
  
          String parametersString = readStringParameter(reqParameters, AudioCutAndJoinParameters.PARAMETERS_STRING, AudioCutAndJoinParameters.PARAMETERS_STRING_MANDATORY);
  
          trace.debug(this.getClass().getSimpleName() + " parameter " + AudioCutAndJoinParameters.PARAMETERS_STRING + "=" + parametersString);
  
  
  
          String cmdFolder = readStringParameter(reqParameters, AudioCutAndJoinParameters.COMMAND_FOLDER, AudioCutAndJoinParameters.COMMAND_FOLDER_MANDATORY);
  
          trace.debug(this.getClass().getSimpleName() + " parameter " + AudioCutAndJoinParameters.COMMAND_FOLDER + "=" + cmdFolder);
  
  
  
          Map markInIdRelativeMap=JsonEntityManager.getInstance().deserializeMap(markInRelative);
  
          Map parametersMap=JsonEntityManager.getInstance().deserializeMap(parameters);
  
          List <string> InputUri= JsonEntityManager.getInstance().deserializeList(inputUri);
  
  
  
          InputStream transcodeOutput = Services.getInstance().runAudioCutAndJoin(parametersMap,markInIdRelativeMap,InputUri,parametersString,cmdFolder);
  
          inputStreamChannel = new InputStreamChannel(transcodeOutput);
  
  
  
          ReadableRepresentation result = new ReadableRepresentation(inputStreamChannel, MediaType.AUDIO_ALL);
  
  
  
          Disposition disp = new Disposition(Disposition.TYPE_ATTACHMENT);
  
  
  
          disp.setFilename("test-cut.wav");
  
          result.setDisposition(disp);
  
  
  
          return result;
  
  </string>

  I’m using the process.getInputStream() as return of my runAudioCutAndJoin but no download happens until the process of conversion/concatenation is done. Can somebody please help me out ?

• How to find and download m3u8 file from websites's link like hotstar, voot and sonyliv in php, javascript or nodejs or python [on hold]

  10 juillet 2018, par gaurav pandey

  I’m trying to download the m3u8 file from website’s(Like hotstar, voot etc) video link using php or javascript or nodejs or python.

  Please help.
  Thanks

• Attempting to use recursion, why does my code only download 4 videos and exit ?

  16 avril 2024, par Andrew Atwood

  I am attempting to download videos from an API that I have access to. This should loop through all of the videos that were returned from the API call, save them to disc, use ffmpeg to verify the meta data from the API (this step is necessary because the API is sometimes returning incorrect information), then save attribution information and continue on if no error. However, my output from the below code is simple this :

  


  []
Download Done: 0
Saved 'Owner: Anthony �; Owner URL: https://www.pexels.com/@inspiredimages' to animals.txt     
13
0
Download Done: 1
Saved 'Owner: PMA; Owner URL: https://www.pexels.com/@pma-1470250' to animals.txt
35
1
Download Done: 2
Saved 'Owner: Pressmaster; Owner URL: https://www.pexels.com/@pressmaster' to animals.txt      
65
2
Download Done: 3
Saved 'Owner: Ruvim Miksanskiy; Owner URL: https://www.pexels.com/@digitech' to animals.txt    
75
3


  


  No errors, no exit code. Just stops running. I've walked through the process in my head a few times, and I can't figure out why it only gets called 4 times. Would anyone have any insight as to where I could try troubleshooting ?

  


  Code Here :

  


  require("dotenv").config();
const axios = require("axios");
const concat = require("ffmpeg-concat");
const fluent = require("fluent-ffmpeg");
const fs = require("fs");

const PEXELS_API_KEY = process.env.PEXELS_API_KEY;

const SUBTOPIC = "animals";

const URLBase = `https://api.pexels.com/videos/search?query=${SUBTOPIC}&per_page=80&size=medium&orientation=landscape`;
let rVideos;
let videosToConcat = [];
let duration = 0;
let current = 0;

const fetchVideos = async () => {
  const response = await axios.get(URLBase, {
    headers: {
      Authorization: PEXELS_API_KEY,
    },
  });

  return response.data.videos;
};

const writeVideoToDisc = async (videoObj) => {
  let found = false;
  videoObj.forEach(async (file, index) => {
    if (
      found === false &&
      file.quality === "hd" &&
      file.width === 1920 &&
      file.height === 1080 &&
      file.file_type === "video/mp4"
    ) {
      found = true;
      let writer = fs.createWriteStream("raw/" + current + ".mp4");
      let streamResponse = await axios({
        url: rVideos[current].video_files[index].link,
        method: "get",
        responseType: "stream",
      });
      streamResponse.data.pipe(writer);
      writer.on("finish", () => {
        console.log(`Download Done: ${current}`);
        fluent.ffprobe(`./raw/${current}.mp4`, (err, metadata) => {
          if (err) {
            console.error(err);
          } else {
            if (
              metadata.streams[0].width !== 1920 ||
              metadata.streams[0].height !== 1080
            ) {
              fs.unlink(`./raw/${current}.mp4`, (err) => {
                if (err) throw err;
                console.log("File deleted!");
              });
            } else {
              duration += rVideos[current].duration;
              videosToConcat.push(`./raw/${current}.mp4`);
              fs.appendFile(
                `./attribution/${SUBTOPIC}.txt`,
                `Owner: ${rVideos[current].user.name}; Owner URL: ${rVideos[current].user.url} \n`,
                function (err) {
                  if (err) throw err;
                  console.log(
                    `Saved 'Owner: ${rVideos[current].user.name}; Owner URL: ${rVideos[current].user.url}' to ${SUBTOPIC}.txt`
                  );
                  if (duration < 600) {
                    console.log(duration);
                    console.log(current);
                    current++;
                    writeVideoToDisc(rVideos[current].video_files);
                  }
                }
              );
            }
          }
        });
      });
      writer.on("error", () => console.error("Error while dowloading video"));
    }
  });
};

const main = async () => {
  rVideos = await fetchVideos();
  console.log(rVideos.length);
  await writeVideoToDisc(rVideos[current].video_files);
  console.log(videosToConcat);
  // concat videos together
};

main();