marshallmassengill

Install gstreamer + plugins on one system:
gst-launch-1.0 -v mpegtsmux name=mux alignment=1 ! udpsink host=238.0.0.1 port=1234 videotestsrc ! video/x-raw,width=1280,height=720,format=I420 ! x264enc speed-preset=ultrafast bitrate=3000 key-int-max=60 ! video/x-h264,profile=high ! mux.

Download and install mediamtx to "receive" the stream sent from gstreamer.
https://github.com/bluenviron/mediamtx

mediamtx will be used to re-broadcast the stream over webrtc.  This can be done on as many systems as seems reasonable for demonstrating multicast.

mediamtx.yml config file (note, this file needs to be edited to have the right IPs):
--------------------------------------------------

sfahadshahzad

from kivy.app import App
from kivy.uix.widget import Widget
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.image import Image
from kivy.clock import Clock
from kivy.graphics.texture import Texture

import cv2
import numpy as np

Skimige

# iptvscan
# Script for scanning and saving IPTV playlist.
# Python v.3 required for using. https://www.python.org/downloads/

# Author: joddude <joddude@gmail.com>

# Disclaimer:
# This script is free and provided "as is" without any warranty.
# You can use it at your own risk.
# The author assumes no responsibility for any moral or material damage caused

44213

# To extract the sound from a video and save it as MP3:
ffmpeg -i <video.mp4> -vn <sound>.mp3

# To convert frames from a video or GIF into individual numbered images:
ffmpeg -i <video.mpg|video.gif> <frame_%d.png>

# To combine numbered images (frame_1.jpg, frame_2.jpg, etc) into a video or GIF:
ffmpeg -i <frame_%d.jpg> -f image2 <video.mpg|video.gif>

# To quickly extract a single frame from a video at time mm:ss and save it as a 128x128 resolution image:

matiaspl

What is it for

FFMPEG based delay loop running in RAM for Blackmagic Decklink video cards. It's useful if you need a "profanity protection" buffer, but could also be used as a poormans instant replay.

How does it work

The idea behind this is to use exploit ffmpeg's concat filter as an intermediate buffer. The length of the delay line is set by the -t parameter before anullsrc in the example below ((or d after smptehdbars).

In my case I wanted PAL interlaced input and output. If you want to use different framerate change the format using the aproppriate -format_code parameter.

stecman

FFmpeg streaming

These are some ffmpeg command lines used when developing VHS dubbing controller.

HLS Stream (on Linux)

#!/bin/bash

# Stream a PAL 50i capture, cropped and de-interlaced using ffmpeg

ProTechEx

FFmpeg build for NVIDIA & Intel hardware on Ubuntu 18.04LTS+:

Build platform: Ubuntu 18.04LTS

Goals: Generate an FFmpeg build that can utilize NVENC hardware acceleration on NVIDIA-based systems on Ubuntu 18.04LTS+.

First steps:

Purge all NVIDIA drivers first:

stoyanovgeorge

#!/bin/bash


ffmpeg -re -analyzeduration 100M -probesize 100M -stream_loop -1 -i <input_file.ts> \
       -vf setdar=16/9 -f decklink -pix_fmt uyvy422 -format_code pal "DeckLink Mini Monitor"

rowe-morehouse

# To extract the sound from a video and save it as MP3:
ffmpeg -i <video.mp4> -vn <sound>.mp3

# To convert frames from a video or GIF into individual numbered images:
ffmpeg -i <video.mpg|video.gif> <frame_%d.png>

# To combine numbered images (frame_1.jpg, frame_2.jpg, etc) into a video or GIF:
ffmpeg -i <frame_%d.jpg> -f image2 <video.mpg|video.gif>

# To quickly extract a single frame from a video at time mm:ss and save it as a 128x128 resolution image:

hum4n0id

• Gstreamer Pipeline Samples
  • Video
    • display test video
    • record to file
    • record and display at the same time(queue)
    • record webcam to *.mp4(jetson nano)
    • fps test
  • Audio
  • Mux Video and Audio
• Media File