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• How to add watemark in a video with ffmpeg, Python ?

  16 décembre 2023, par Mr.Slow

  I would like to add a .png watemark with 50% opacity over all my video. I would prefer using a ffmpeg filter over merging the watemark image with video-to-be images.

  


  audio = f'{PROJECT_PATH}/data/ppt-elements/audio_{file_id}.txt'
images = f'{PROJECT_PATH}/data/ppt-elements/images_{file_id}.txt'

image_input = ffmpeg.input(images, f='concat', safe=0, t=seconds).video
audio_input = ffmpeg.input(audio, f='concat', safe=0, t=seconds).audio

additional_parameters = {'c:a': 'aac', 'c:v': 'libx264'}

audio_input = ffmpeg.filter(audio_input, "amix", inputs=2, duration="longest")

watermark_file = f"{PROJECT_PATH}/data/logo/logo.png"

# add watermark
watermark = ffmpeg.input(watermark_file)

inputs = [image_input, audio_input, watermark]

watermark_filter = '[0:v][2:v]overlay=10:10'  

command = ffmpeg.output(*inputs, f"{PROJECT_PATH}/data/final-{file_id}.mp4", vf=[watermark_filter, "fps=10,format=yuv420p"],
                        preset="veryfast", shortest=None, r=10, max_muxing_queue_size=4000,
                        **additional_parameters)
command.overwrite_output().run(capture_stdout=True, capture_stderr=True)


  


  This code, however, creates a video without any watermark in it. Can you see any error ?

  


• Rtsp streaming on nodejs - Blank screen

  17 juillet 2024, par theplaceofburak

  I am currently working on a Node.js project where I need to implement streaming using ffmpeg. However, I am facing an issue with the streaming process, as I am getting an empty blank screen instead of the expected video stream.

  


  Here's a brief overview of what I have done so far on the server-side :

  


  Installed ffmpeg and made sure it is accessible in the environment.
Configured the server-side code for the streaming process.
However, despite these efforts, the stream is not working correctly, and I am unable to see the video stream on the client-side.

  


  Server-side code :
app.js

  


  const express = require('express');
const Stream = require('node-rtsp-stream');

const app = express();
const port = 4000;

// Start the RTSP stream
const stream = new Stream({
  name: 'rtsp_server_name',
  streamUrl: 'rtsp://wowzaec2demo.streamlock.net/vod/mp4:BigBuckBunny_115k.mp4',
  wsPort: 3000,
  ffmpegOptions: {
    '-stats': '', // an option with no necessary value uses a blank string
    '-r': 30, // options with required values specify the value after the key
  },
});

stream.on('data', data => {
  console.log(data);
});

app.get('/', (req, res) => {
  res.send('Hello World');
});

app.listen(port, () => {
  console.log(`Server running at http://localhost:${port}/`);
});


  


  index.html

  


  &#xA;  &#xA;    <canvas></canvas>&#xA;  &#xA;  <h1>Test rtsp video</h1>&#xA;  <code class="echappe-js">&lt;script type=&quot;text/javascript&quot; src='http://stackoverflow.com/feeds/tag/js/jsmpeg.min.js'&gt;&lt;/script&gt;&#xA;  &lt;script type=&quot;text/javascript&quot;&gt;&amp;#xA;    player = new JSMpeg.Player(&amp;#x27;ws://localhost:3000&amp;#x27;, {&amp;#xA;      canvas: document.getElementById(&amp;#x27;canvas&amp;#x27;), // Canvas should be a canvas DOM element&amp;#xA;    });&amp;#xA;  &lt;/script&gt;&#xA;&#xA;

  


  I got no console error when I open index.html but only get blank black screen
  


  


• Error with RTSP Stream in Node.js : Could not find codec parameters for stream 0 (Video : h264, none)

  7 août 2023, par theplaceofburak

  I have a Node.js application that uses the node-rtsp-stream package to stream an RTSP video from an IP camera. However, when I run the application, I encounter the following errors in the console after a few minutes :

  


  [rtsp @ 000002402795dd80] Could not find codec parameters for stream 0 (Video: h264, none): unspecified size
Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options
Input #0, rtsp, from 'rtsp://fake_test:jksdfhskhdfsomethingfake@111.111.11.1111:50213/cam/realmonitor?channel=1&subtype=1'(fake rtsp link used for privacy)':
  Metadata:
    title           : Media Server
  Duration: N/A, bitrate: N/A
  Stream #0:0: Video: h264, none, 90k tbr, 90k tbn
Output #0, mpegts, to 'pipe:':
[out#0/mpegts @ 0000024027987b80] Output file does not contain any stream
Error opening output file -.
Error opening output files: Invalid argument
RTSP stream exited with error


  


  I am certain that the RTSP stream from the camera is in H.264 - MPEG-4 AVC format, and I can play it in VLC without any issues. However, when I try to stream it using the node-rtsp-stream package, I encounter these errors.

  


  Here is my Node.js code :

  


  const express = require('express');
const Stream = require('node-rtsp-stream');

const app = express();
const port = 4000;


const stream = new Stream({
  name: 'rtsp_server_name',
  streamUrl: 'rtsp://fake_test:jksdfhskhdfsomethingfake@111.111.11.1111:50213/cam/realmonitor?channel=1&subtype=1'(fake rtsp link used for privacy),
  wsPort: 9999,
  ffmpegOptions: {
    '-stats': '', // an option with no necessary value uses a blank string
    '-r': 30, // options with required values specify the value after the key
  },
});

// Middleware to log each request
app.use((req, res, next) => {
  console.log(`${req.method} ${req.url}`);
  next();
});

app.get('/', (req, res) => {
  res.send('Hello World');
});

app.listen(port, () => {
  console.log(`Server running at http://localhost:${port}/`);
});

// Event listener to check if the RTSP stream is ready
stream.on('data', (data) => {
  if (data.includes('frame=')) {
    console.log('RTSP stream is ready and streaming.');
  }
});


  


  I have tried increasing the values for 'analyzeduration' and 'probesize' options, but the errors persist. How can I resolve these errors and successfully stream the RTSP video in H.264 format using the node-rtsp-stream package ? Any help or guidance would be appreciated. Thank you !