e04

This article is out of date. Please refer to the following repository

go-irl: A modern SRTLA Streaming Stack

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Step-by-Step Setup Guide

Follow these steps to configure the entire pipeline on your PC.

Bytexionl

#!/bin/sh

apt update -y
apt-get upgrade -y 
dpkg-reconfigure tzdata
apt install build-essential checkinstall
apt install ubuntu-restricted-extras
apt install software-properties-common
apt upgrade -o APT::Get::Show-Upgraded=true
apt-show-versions | grep upgradeable

LuizStSantos

Compiling and Installing FFmpeg with Decklink Support and Nvidia Cuda on Ubuntu Server

1. Download and Install the NVIDIA Driver

Install the NVIDIA driver for CUDA and other GPU-related tools:

• Version: nvidia-driver-535

sudo apt update
sudo apt-get install nvidia-driver-535
sudo reboot

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 <[email protected]>

# 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.

ericxtang

Hosting the Community Grants Orchestrator

The community grants orchestrator switched from using a cloud-hosted CPU node to a GPU-based CherryServer node on 12/27/2020.

As a result, the transcoding performance according to the leader board has increased from 15% success rate to over 99% success rate.

We want to share the exact steps we took for the migration.

Step1: Provisioning a CherryServer GPU Machine

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