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from moviepy.editor import VideoFileClip, CompositeVideoClip, TextClip
import os
def parse_srt(srt_string):
"""Parse the SRT string and return a list of (start, end, text) for each subtitle."""
lines = srt_string.split("\n")
i = 0
subtitles = []
while i < len(lines):
if lines[i].strip().isdigit():
timing_str = lines[i+1].strip().split(" --> ")
start = timing_str[0]
end = timing_str[1]
text = lines[i+2].strip()
subtitles.append((start, end, text))
i += 4
else:
i += 1
return subtitles
def filter_caption_width(caption_mode:str):
if caption_mode == 'desktop':
caption_width_ratio = 0.5
caption_height_ratio = 0.8
elif caption_mode == 'mobile':
caption_width_ratio = 0.2
caption_height_ratio = 0.7
return caption_width_ratio, caption_height_ratio
def subtitler(video_file:str,
srt_string:str,
output_file:str,
fontsize:int,
font: str,
bg_color:str,
text_color:str,
caption_mode:str
):
"""Add subtitles from an SRT string to a video."""
video_file = os.path.abspath(video_file)
output_file = os.path.abspath(output_file)
clip = VideoFileClip(filename=video_file, target_resolution=None)
subtitles = parse_srt(srt_string)
subtitle_clips = []
caption_width_ratio, caption_height_ratio = filter_caption_width(caption_mode)
for start, end, text in subtitles:
# Create TextClip with specified styling
# To get a list of possible color and font values run: print(TextClip.list("font"), '\n\n', TextClip.list("color"))
txt_clip = TextClip(text, fontsize=fontsize, color=text_color, font=font, method='caption',
bg_color=bg_color, align='center', size=(clip.w*caption_width_ratio, None))
txt_clip = txt_clip.set_position(('center', 'bottom')).set_duration(clip.duration).set_start(start).set_end(end)
subtitle_x_position = 'center'
subtitle_y_position = clip.h * caption_height_ratio
text_position = (subtitle_x_position, subtitle_y_position)
subtitle_clips.append(txt_clip.set_position(text_position))
video = CompositeVideoClip(size=None, clips=[clip] + subtitle_clips)
video.write_videofile(output_file, codec='libx264', audio_codec='aac') |