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4 changes: 2 additions & 2 deletions content/lessons/ffmpeg-useful-techniques/index.md
Original file line number Diff line number Diff line change
Expand Up @@ -54,7 +54,7 @@ The `scale` filter resizes the video to a width of 320 pixels, while maintaining

The `split` filter splits the video stream into two branches, one to generate the palette and the other to apply it.

The [palettegen](https://ffmpeg.org/ffmpeg-filters.html#palettegen-1) filter creates a color palette based on the input video and and outputs the palette as a video stream, which is passed to the paletteuse filter along with the original video stream.
The [palettegen](https://ffmpeg.org/ffmpeg-filters.html#palettegen-1) filter creates a color palette based on the input video and outputs the palette as a video stream, which is passed to the paletteuse filter along with the original video stream.

Additional ideas for Gif optimization are discussed here by [Giphy Engineering](https://engineering.giphy.com/how-to-make-gifs-with-ffmpeg/).

Expand Down Expand Up @@ -97,4 +97,4 @@ exports.convertVideo = functions.https.onRequest((req, res) => {
})
.run();
});
```
```
2 changes: 1 addition & 1 deletion content/lessons/react-firebase-chat-app-tutorial/index.md
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Expand Up @@ -37,7 +37,7 @@ The following tutorial demonstrates how to build a simple group chat app with Re

### Firebase Project

Create a free [Firebase](https://firebase.google.com/) project. Make sure to enable Google SignIn and and activate Cloud Firestore.
Create a free [Firebase](https://firebase.google.com/) project. Make sure to enable Google SignIn and activate Cloud Firestore.

### Create a React App

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