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• avcodec/nvenc : hardcode color characteristics for internal RGB2YUV conversion

  6 août 2022, par Timo Rothenpieler

  avcodec/nvenc : hardcode color characteristics for internal RGB2YUV conversion
  nvenc does not appear to use these values as inputs for its built in RGB
  
  to YUV conversion, but instead sets them on the output as-is.
  Testing indicates the input is expected to be sRGB, with the output
  
  ending up as limited range bt.470.
  

  • [DH] libavcodec/nvenc.c

• avcodec/internal : Move ff_thread_can_start_frame() to threadframe.h

  1er août 2022, par Andreas Rheinhardt

  avcodec/internal : Move ff_thread_can_start_frame() to threadframe.h
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavcodec/internal.h
  • [DH] libavcodec/threadframe.h

• POST http://localhost:3000/api/video/thumbnail 500 (Internal Server Error) MongoDB and FFmpeg

  5 juillet 2022, par VoicedCreator

  I am trying to insert a thumbnail on my page using POST and im getting this error
I want to screenshot a video using FFmpeg

  


  const express = require('express');
const router = express.Router();
const multer = require('multer');
var ffmpeg = require('fluent-ffmpeg');
const { User } = require("../models/User");

const { auth } = require("../middleware/auth");
const storage = multer.diskStorage({
    destination: function (req, file, cb) {
      cb(null, 'uploads/')
    },
    filename: function (req, file, cb) {
      cb(null, `${Date.now()}_${file.originalname}`)
    },
    fileFilter: (req, file, cb) => {
        const ext = path.extname(file.originalname);
        if(ext !== '.mp4' || ext !== '.mov' || ext !== '.wmv'){
            return cb(res.status(400).end('Solo archivos mp4-mov-wmv son aceptados'), false);
        }
        cb(null, true)
    }
  })
  
  const upload = multer({ storage: storage }).single("file")


//=================================
//             User
//=================================

router.post("/uploadfiles", (req, res) => {

    upload(req, res, err => {
        if(err) {
            return res.json({ success: false, err })
        }
        return res.json({ success: true, filePath: res.req.file.path, fileName: res.req.file.filename })
    })

});

router.post("/thumbnail", (req, res) => {


    let filePath = ""
    let fileDuration = ""


    ffmpeg.ffprobe(req.body.url, function (err, metadata) {
        console.dir(metadata); // all metadata
        console.log(metadata.format.duration);
        console.log(metadata) 
        fileDuration = metadata.format.duration
    });


    ffmpeg(req.body.url)
        .on('filenames', function (filenames) {
            console.log('Will generate ' + filenames.join(', '))
            console.log(filenames)


            filePath = "uploads/thumbnails/" + filenames[0]
        })
        .on('end', function () {
            console.log('Screenshots taken');
            return res.json({ success: true, url: filePath, fileName: filenames, fileDuration: fileDuration });
        })
        .on('error', function (err) {
            console.error(err);
            return res.json({ success: false, err });
        })
        .screenshots({
            // Will take screenshots at 20%, 40%, 60% and 80% of the video
            count: 3,
            folder: 'uploads/thumbnails',
            size: '320x240',
            //'%b': input basename (filename w/o extension)
            filename: 'thumbnail-%b.png'
        })
});




router.post("/thumbnail", (req, res) => {


    let filePath = ""
    let fileDuration = ""


    ffmpeg(req.body.url)
        .on('filenames', function (filenames) {
            console.log('Will generate ' + filenames.join(', '))
            console.log(filenames)


            filePath = "uploads/thumbnails/" + filenames[0]
        })
        .on('end', function () {
            console.log('Screenshots taken');
            return res.json({ success: true, url: filePath, fileName: filenames, fileDuration: fileDuration });
        })
        .on('error', function (err) {
            console.error(err);
            return res.json({ success: false, err });
        })
        .screenshots({
            // Will take screenshots at 20%, 40%, 60% and 80% of the video
            count: 3,
            folder: 'uploads/thumbnails',
            size: '320x240',
            //'%b': input basename (filename w/o extension)
            filename: 'thumbnail-%b.png'
        })
});



module.exports = router;


  


  Error : POST http://localhost:3000/api/video/thumbnail 500 (Internal Server Error)
TypeError : Cannot read properties of undefined (reading 'format')

  


  I think is because ffmpeg is not connecting to mongodb