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---
title: 'FFmpeg Tips'
date: 2024-07-29T13:22:41-04:00
draft: false
tags: ['Tech', 'Linux', 'Guide']
---
FFmpeg is one of my favorite tools, though it can be quite challenging to master. This page is dedicated to sharing the commands and knowledge I've accumulated from using FFmpeg.
**Check back soon for more updates!**
## Encoding Videos
Here's a simple reference for re-encoding videos.
### WEBM
For WEBM files, there are three common codecs: VP8, VP9, and AV1[^1].
#### VP8
```bash
ffmpeg -i video.mkv -c:v libvpx -c:a libvorbis video.webm
```
#### VP9
```bash
ffmpeg -i video.mkv -c:v libvpx-vp9 -c:a libopus video.webm
```
#### AV1
```bash
ffmpeg -i video.mkv -c:v libsvtav1 -c:a libopus video.webm
```
### MP4
For MP4 files, you can use the following codecs:
#### H.264 (x264)
```bash
ffmpeg -i video.mkv -c:v libx264 -c:a aac video.mp4
```
#### H.265 (x265)
```bash
ffmpeg -i video.mkv -c:v libx265 -c:a aac video.mp4
```
#### NVIDIA NVENC H.264
If you have an NVIDIA GPU, you can use the NVENC encoder for H.264:
```bash
ffmpeg -i video.mkv -c:v h264_nvenc -c:a aac video.mp4
```
#### NVIDIA NVENC H.265
For H.265 using NVIDIA NVENC:
```bash
ffmpeg -i video.mkv -c:v hevc_nvenc -c:a aac video.mp4
```
## Recording Screen
To record your screen, use the following command:
```bash
ffmpeg -y -f x11grab -s 1920x1080 -i :0.0 test.mkv
```
You can also add `-framerate 30` to set a custom frame rate.
### Recording Microphone
To record audio from your microphone:
```bash
ffmpeg -f alsa -i default -c:a flac test.flac
```
### Recording Screen and Microphone
To record both your screen and microphone:
```bash
ffmpeg -y -f x11grab -s 1920x1080 -i :0.0 -f alsa -i default test.mkv
```
With specific codecs:
```bash
ffmpeg -y -f x11grab -s 1920x1080 -i :0.0 -f alsa -i default -c:a flac -c:v libx264 test.mkv
```
[^1]: The FFmpeg codecs are: VP8 = `libvpx`, VP9 = `libvpx-vp9`, AV1 = `libsvtav1`.
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