CODEWITHSUNDEEP
pythonffmpegmoviepy
Sefi_k
Sefi_k

Reputation: 107

ffmpeg reverts to default subtitle font

I'm using ffmpeg-python to burn an SRT into a video file. My code looks something like this:

caption_file = "captions.srt"
style = "FontName=Roboto-Regular,FontSize=8"
fonts_dir = "fonts-main/apache"

(
    ffmpeg  
    .concat(video.filter("subtitles", caption_file, fontsdir=fonts_dir, force_style=style), audio, v=1, a=1)
    .output("my_video_w_subs.mp4")
    .run()
)

When I run the code, the SRT indeed gets burned, but not in the specified font (Roboto-Regular).

Here are the output logs:

[Parsed_subtitles_0 @ 0x55adfd490e80] Loading font file 'fonts-main/apache/Roboto-Regular.ttf'
[Parsed_subtitles_0 @ 0x55adfd490e80] Using font provider fontconfig
[Parsed_subtitles_0 @ 0x55adfd490e80] fontselect: (Roboto-Regular, 400, 0) -> /usr/share/fonts/truetype/dejavu/DejaVuSans.ttf, 0, DejaVuSans

It seems the desired font was found and loaded so I'm not sure why wasn't it used.

Upvotes: 1

Views: 1337

Answers (1)

Rotem
Rotem

Reputation: 32124

It looks like fonts_dir should include the font file name.

Instead of fonts_dir = "fonts-main/apache", try:

fonts_dir = "fonts-main/apache/Roboto-Regular.ttf"

Note: fonts-main/apache/Roboto-Regular.ttf uses relative path.
You may try using full path like: /fonts-main/apache/Roboto-Regular.ttf.

For debugging add the argument .global_args('-report'), and check the log file.

Here is a complete code sample:

import ffmpeg

caption_file = "captions.srt"
style = "FontName=Roboto-Regular,FontSize=8"
fonts_dir = "/fonts-main/apache/Roboto-Regular.ttf"

input = ffmpeg.input('1.avi')

video = input.video
audio = input.audio

(
    ffmpeg  
    .concat(video.filter("subtitles", filename=caption_file, fontsdir=fonts_dir, force_style=style), audio, v=1, a=1)
    .output("my_video_w_subs.mp4")
    .global_args('-report')
    .overwrite_output()
    .run()
)

When using fonts_dir = "/fonts-main/apache", I am getting an error ass_read_file(/fonts-main/apache/����): fopen failed

Note:

  • I am using Windows, and I am not sure that the fonts_dir value is the true problem (I am not getting the Loading font file message).

Upvotes: 0

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