Im testing with this piece of code to send opencv img from python to nodejs with socket.io but its not working can anyone help me with?
Python
from socketio import Client
from cv2 import imread, imencode
import base64
socket = Client( )
@socket.on( 'connect' )
def connect( ):
print( 'connected to server' )
img = imread( 'screenshot.png' )
frame = imencode( '.png', img )[ 1 ]
encoded = base64.b64encode( frame )
socket.emit( 'img', encoded )
@socket.on( 'disconnect' )
def disconnect( ):
print( 'disconnected from server' )
socket.connect( 'http://127.0.0.1:3000' )
socket.wait( )
Nodejs
const express = require( 'express' )
const app = express( )
const http = require( 'http' ).Server( app )
const socket = require( 'socket.io' )( http )
const path = require( 'path' )
const fs = require( 'fs' )
const cv = require( 'opencv4nodejs' );
app.get( '/', ( req, res ) => {
res.sendFile( path.join( __dirname + '/index.html' ) )
} )
socket.on( 'connect', ( player ) => {
console.log( 'Connected: '+ player.id )
player.on( 'img', ( encoded ) => {
var buffer = Buffer.from( encoded, 'base64' )
var image = cv.imdecode( buffer, cv.IMREAD_COLOR )
cv.imwrite( 'img.png', image )
} )
player.on( 'disconnect', ( player ) => {
console.log( 'Disconnected: '+ player.id )
} )
} )
http.listen( 3000, ( ) => {
console.log( 'listening on *:3000' )
} )
Im getting this warnings/error in nodejs:
libpng warning: Image width is zero in IHDR
libpng warning: Image height is zero in IHDR
libpng error: Invalid IHDR data
Sorry for me bad english, and thanks by the way.
