> For the complete documentation index, see [llms.txt](https://book.bsdcn.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://book.bsdcn.org/ask/flat/chapter-11-multimedia-and-external-devices/di-11.7-jie-duo-mei-ti-chu-li.md).
# 11.7 Multimedia Processing
FreeBSD supports tools such as Audacity (audio editing), Kdenlive/FFmpeg (video and subtitle processing), Inkscape (vector graphics processing), MuseScore (music notation), Blender (3D modeling), and Krita (digital painting). This section provides installation and basic usage methods by category.
## Video Streaming and Live Recording
### OBS Studio
OBS Studio is a free and open-source video streaming and live recording software.
Install using pkg:
```sh
# pkg install obs-studio
```
Or compile and install using Ports:
```sh
# cd /usr/ports/multimedia/obs-studio/
# make install clean
```
Adjust OBS Studio video input sources:
The microphone can adapt automatically. The main interface after adjustment:
## Audio Editing
### Audacity
Audacity is an open-source cross-platform audio editing software.
Install using pkg:
```sh
# pkg install audacity
```
Or compile and install using Ports:
```sh
# cd /usr/ports/audio/audacity/
# make install clean
```
## Video Editing
### Kdenlive
Kdenlive is an open-source non-linear video editing software.
Install Kdenlive using pkg:
```sh
# pkg install kdenlive
```
Or compile and install using Ports:
```sh
# cd /usr/ports/multimedia/kdenlive/
# make install clean
```
## Subtitles
### FFmpeg
FFmpeg is an open-source multimedia processing framework that can be used to burn subtitles into video.
Install FFmpeg using pkg:
```sh
# pkg install ffmpeg
```
Or compile and install using Ports:
```sh
# cd /usr/ports/multimedia/ffmpeg/
# make install clean
```
Example command for burning ASS (Advanced SubStation Alpha) format subtitles into video using FFmpeg:
```sh
$ ffmpeg -i video_file.mp4 -vf subtitles=corresponding_subtitle.ass output_video.mp4
```
Where:
* `-i` specifies the input video file;
* `-vf subtitles=` applies the subtitle filter and specifies the subtitle file path;
* `output_video.mp4` specifies the name of the output video file.
## Clipping
Inkscape is a vector drawing program. This section introduces basic clipping operations.
### Installing Inkscape
* Install Inkscape using pkg:
```sh
# pkg install inkscape
```
* Or compile and install using Ports source code:
```sh
# cd /usr/ports/graphics/inkscape/
# make install clean
```
### Basic Clipping Method with Inkscape
1. Use the shortcut `Ctrl` + `O` (the letter `o`) to open the image file to be processed;
2. Use the shortcut `Shift` + `F6` to switch to the Bezier curve and straight line drawing mode;
3. Use Bezier curves to draw a closed path along the edge of the target area (return to the starting point to close the path);
4. Hold down the `Shift` key and click to select the image and the closed path in sequence (the path must be above the image);
5. In the menu bar, select **Object** → **Clip** → **Set Clip** to achieve the clipping effect.
### References
* Inkscape. Inkscape Tutorials\[EB/OL]. \[2026-03-25]. . Provides detailed tutorials for the Inkscape vector drawing software, covering basic operations and advanced features.
## Music
### Music Notation Software MuseScore
MuseScore is an open-source music notation software that supports score creation, editing, and playback.
Install using pkg:
```sh
# pkg install musescore
```
Or install using Ports:
```sh
# cd /usr/ports/audio/musescore/
# make install clean
```
## 3D Graphics
### 3D Modeling Blender
Blender is an open-source 3D modeling and animation software that supports modeling, rendering, animation, and other features.
Install using pkg:
```sh
# pkg install blender
```
Or install using Ports:
```sh
# cd /usr/ports/graphics/blender/
# make install clean
```
The software supports Simplified Chinese. Through the menu **Edit** → **Preferences** → **Interface** → **Translation**, select **Simplified Chinese (简体中文)** from the **Language** dropdown menu to switch the interface language.
## Painting
### Krita
Krita is an open-source digital painting software designed specifically for illustrators and concept artists.
Install using pkg:
```sh
# pkg install krita
```
Or install using Ports:
```sh
# cd /usr/ports/graphics/krita/
# make install clean
```
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