https://github.com/natlee/ffmpeg-video-writter-with-python

This is a video writter used to write video with FRENDLY ffmpeg.
https://github.com/natlee/ffmpeg-video-writter-with-python

ffmpeg image-processing opencv python video-processing videowriter

Last synced: about 2 months ago
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This is a video writter used to write video with FRENDLY ffmpeg.

• Host: GitHub
• URL: https://github.com/natlee/ffmpeg-video-writter-with-python
• Owner: NatLee
• License: mit
• Created: 2020-01-31T10:21:56.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2020-02-03T03:20:21.000Z (over 6 years ago)
• Last Synced: 2025-07-13T02:41:53.365Z (12 months ago)
• Topics: ffmpeg, image-processing, opencv, python, video-processing, videowriter
• Language: Python
• Size: 10.9 MB
• Stars: 1
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# FFmpeg Video Writter with Python

[![License: MIT v3](https://img.shields.io/badge/license-MIT-blue.svg)](./LICENSE) [![Python 3](https://img.shields.io/badge/python-3-blue.svg)](https://www.python.org/)

## Introduction

As title, this is a video writter used to write video with **friendly** ffmpeg.

I'm angry with the fucking OpenCV because the video writter always saves only **6KB** video header instead of saving videos.

> I found the reason is that the video writter in OpenCV dose **NOT** check the shape of frame when writting into a file and it does **NOT** give any errors and warnings. In short, if the size is different from the original setting of video writter, it will **NOT** write any frames.

## Requirements

- ffmpeg-python

- opencv-python

- numpy

> OpenCV is optional and it's only used in the demo.

## Usage

### Quick Start

```python

import cv2

from FFmpegVideoWritter import FFmpegVideoWritter

ffvw = FFmpegVideoWritter('./data/test.mp4', './result/result.mp4')

while True:

    frame = ffvw.get_frame()

    if frame is not None:

        out_frame = cv2.resize(frame, None, fx=0.5, fy=0.5)

        cv2.imshow('frame', cv2.cvtColor(out_frame, cv2.COLOR_BGR2RGB))

        cv2.waitKey(1)

        ffvw.write(out_frame)

    else:

        break

ffvw.close()

# You can get gif output!

ffvw.output_to_gif('./result/test.gif')

```

### Demo

You can run the DEMO with the following command.

```

python main.py

```

## Results

Drawing ramdomly rectangles from original video in `main.py`.

![Result](./result/result.mp4.gif)