VIDEO LOOM

What does video loom do?

This is a portable / multi-platform application that helps you trim videos. Say you have 4 cameras shooting a scene simultaneously, video loom can cut these videos by timestamps and combine them into the dynamic final product, try it out!

User guide

Before start using the software, be sure to have following softwares installed on your local machine.

windows - chocolatey and ffmpeg

• for NVidia graphics cards users, the minimum required Nvidia driver for nvenc is 522.25 or newer
• python v3.9+

mac - ffmpeg

Windows

How to install chocolatey on windows

1. Open powershell on windows w/ administration access

2. In powershell, type Set-ExecutionPolicy AllSigned then click enter

3. Execute this command

   Set-ExecutionPolicy Bypass -Scope Process -Force; [System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072; iex ((New-Object System.Net.WebClient).DownloadString('https://community.chocolatey.org/install.ps1'))

How to install ffmpeg

1. open powershell on windows w/ administration access
2. In powershell, type choco install ffmpeg-full, then click enter
3. wait till the installation process is complete
4. (optional) to verify ffmpeg is installed, reopen another powershell terminal and type ffmpeg and click enter. You should not see any error messages.

Mac

How to install ffmpeg

1. in terminal. run brew install ffmpeg

How to run the application

• download the .exe (windows) or .app (macOS) file here

• open the application

• click on "Import files" button and start importing videos (up to 4)

  • 

• click on "Play all videos" and "Pause all videos" to play all video files simutaneously

  • use skip -5 / +5 buttons to skip backward and forward
  • (optional) if you want to play video with audio. Choose an audio track, then click on "generate preview" button under "Audio settings"
    • 
    • Wait till the application prompts you the preview generation is complete. Now when you play vidoes, you can hear the audio from the video simutenously

• In the text box, type in the segments of the videos you want to trim

  • e.g. If you'd like to use 0:00:00 - 0:10:00 from video 1, and 0:10:00 - 0:15:05 from video 2. Then the text would look like (as shown below):

  1,0:00:00,0:10:00
  2,0:10:00,0:15:05

  • 

• select the audio you would like to use for the final video

• then click "generate video" to start generating the final output. The output file will be in .mp4 format and named after the current timestamp

Environment setup (for developers)

windows (WSL2)

1. In order to allow rendering in WSL2. We need to ensure Xming is installed.

2. Before starting development, launch application "XLaunch"

3. Follow below steps, for Additional parameters for VcXsrv, type -ac

4. After above steps, click Finish and launch Xming

5. Once Xming is launched, we'll need to configure the $DISPLAY variable to point to the local machine's IP. To do that, open a terminal and follow below steps:

$cat /etc/resolv.conf

# this is what you will see
# # This file was automatically generated by WSL. To stop automatic generation of this file, add the following entry to /etc/wsl.conf:
# # [network]
# # generateResolvConf = false
# nameserver 172.27.176.1

$export DISPLAY=172.27.176.1:0 # ensure :0 appended in the end

6. (optional) If you are running application using code-runner in VSCode. You can configure "code-runner.runInTerminal": true in settings.json. As well as setting python command as python3 -m. See below

   

   (If you are seeing errors related to $DISPLAY, make sure to run export DISPLAY=172.27.176.1:0 in your VSCode terminal)

7. Now you can run python3 <app_name>.py to execute programs.

Install dependencies

# ensure python3.10+ is installed
# install pip dependencies

$pip3 install -r requirements.txt

Testing

# running tests
$pytest -vvs

Packaging

# Generate executables
# note: executables will automatically be determined by the OS. e.g. '.exe' for Windows and '.app' for MacOS

$cd src
$./bundle.sh <app.win32.spec | app.macos.spec> <v_[major][minor][patch]>
# e.g. ./bundle.sh app.win32.spec v1.9.13

Change log

change logs can be found here