[FEAT] Add --enable-libfreetype to FFmpeg build options

[davbauer]

Is this a new feature request?

• I have searched the existing issues

Wanted change

Include the --enable-libfreetype build option in the FFmpeg configuration within the Docker image.

Reason for change

The libfreetype library enables the drawtext filter in FFmpeg, which is essential for overlaying text on videos. This is a very basic yet highly utilized feature in FFmpeg for video processing tasks such as adding captions, watermarks, or text-based overlays. Without this library, users are unable to perform these operations, limiting the utility of the FFmpeg Docker image.

Adding libfreetype will ensure that the drawtext filter is available out of the box, increasing the image's versatility and usability for a wider range of users.

Proposed code change

Update the Dockerfile to include libfreetype-dev as a dependency during the FFmpeg build process and add the --enable-libfreetype flag to the FFmpeg configuration.

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[aptalca]

How did you confirm that it wasn't enabled?

[davbauer]

Hi @aptalca,

I used following command:

ffmpeg -y -i input.mp4 -vf "drawtext=text='Hello':fontcolor=white:fontsize=72:borderw=3:bordercolor=black:x=(w-tw)/2:y=(h-th)/2:box=1:[email protected]:boxborderw=10" -c:v libx264 -crf 23 -preset fast -c:a copy output.mp4

And I received following error:

[AVFilterGraph @ 0x5f89c0dac880] No such filter: 'drawtext'
[vost#0:0/libx264 @ 0x5f89c0d9ab40] Error initializing a simple filtergraph
Error opening output file done.mp4.
Error opening output files: Filter not found

But after some inspection I noticed you guys already have it in the Dockerfile. Therefore this feature request would not solve anything at all..

I will further investigate what is causing this and give an update later.

[davbauer]

Apologizes for the confusion. It seems like I had an older image cached which led to this.

Closed.