To help with your request, I've provided a step-by-step guide on how to burn DVB-Sub titles into a video using FFmpeg. This process is CPU-friendly and utilizes the GPU for better performance.
Prerequisites:
- Install FFmpeg on your system. You can download it from the official FFmpeg website: https://www.ffmpeg.org/download.html
Steps:
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Open a terminal or command prompt and navigate to the directory containing your video and subtitle files.
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Run the following command to burn the subtitles into the video:
ffmpeg -i input_video.avi -vf "subtitles=input_subtitle.srt:force_style='Fontname=Arial;Fontsize=24;Fontcolor=white;' -c:v libx264 -preset veryfast -crf 23 -c:a aac -b:a 192k -movflags +faststart output_video.mp4
Replace input_video.avi with the name of your video file, input_subtitle.srt with the name of your subtitle file, and output_video.mp4 with the desired name of the output file.
Explanation:
-i input_video.avi: Specifies the input video file.-vf "subtitles=input_subtitle.srt:force_style='Fontname=Arial;Fontsize=24;Fontcolor=white;': Enables video filtering and sets the subtitle file and its style.-c:v libx264: Sets the video codec to H.264.-preset veryfast: Sets the encoding preset to "veryfast" for faster processing.-crf 23: Sets the constant rate factor to 23 for a balance between file size and quality.-c:a aac: Sets the audio codec to AAC.-b:a 192k: Sets the audio bitrate to 192 kbps.-movflags +faststart: Enables fast start for streaming.output_video.mp4: Specifies the output file name.
References:
- FFmpeg Official Documentation: https://ffmpeg.org/documentation.html
- FFmpeg DVB Subtitles: https://trac.ffmpeg.org/wiki/Subtitles#DVBSub
- FFmpeg Presets: https://trac.ffmpeg.org/wiki/Encode/H.264#Presets
This command should generate a valid HTML output that burns the DVB-Sub titles into your video. Make sure to adjust the settings according to your specific needs and the quality of your video and subtitle files.