ffmpeg How to fix "Unable to parse option value "/subtitle.ass" as image size"
value "/project/temp/subtitle.ass" as image size That is wrong value "D:/project/temp/subtitle.ass" as image size that is right Here's my code import subprocess from pathlib import Path ass_path = r'D:\project\temp\subtitle.ass' cmd = [ ' ffmpeg ' , ' -i ' , r ' D:\pycharm_project\other\original_video.mp4 ' , ' -vf ' , f " ass={Path(ass_path).resolve().as_posix()} " , ' -c:v ' , ' libx264 ' , ' -crf ' , ' 18 ' , ' -c:a ' , ' copy ' , ' -y ' , ' mmmmm.mp4 ' ] subprocess.run(cmd, check =True) change the subtitle path to the following: f"ass={Path(ass_path).resolve().as_posix()}".replace(':','\\\\:') finally import subprocess from pathlib import Path ass_path = r'D:\project\ffmpeg_demo\20251106155922.ass' cmd = [ 'ffmpeg', '-i', r'D:\py...