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| FFmpeg compressing a video. |
Hello guys, good evening. Today I want to share a simple Bash scripting trick to automatically convert videos from the current directory where the script is placed.
I usually use this script to compress videos before storing them on my old phone, so they don’t take up too much storage.
Let’s get started.
The Bash Script
for f in *.mp4; do
ffmpeg -i "$f" -vcodec libx264 -crf 27 -preset fast -b:v 1M "${f%.mp4}_compressed.mp4"
done
Explanation:
1. for f in *.mp4; do
This will loop everything in the current directory and find only the .mp4 file format to be executed in loop.
2. ffmpeg -i "$f" -vcodec libx264 -crf 27 -preset fast -b:v 1M "${f%.mp4}_compressed.mp4"
- ffmpeg, the program that runs the video tool.
- i "$f", input file "video.mp4"
- vcodec libx264, use H.264 codec to compress.
- crf 27, its quality level and higher number is smaller size of the compressed video.
- preset fast, encoding speed faster encode same as bigger file.
- b:v 1M, video bitrate is 1 Mbps
- "${f%.mp4}_compressed.mp4", the output filename is the original name with _compressed.mp4
3. done
- Every loop in Bash must end with the done keyword.
Saving And Running
Save the file with anything you mean, but here I save the script file with "AutoCompress.sh".
Before you can do the automate compress with this script you need to add the execute permission to the file with:
chmod +x AutoCompress.sh
Now you can run with:
./AutoCompress.sh
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| Running the scrip. |
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| Progress of compressing video. |
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| Video is compressed. |
End
Well, that's all I can share and thank you very much for visiting my blog. I hope to see you again soon!
