Fix: Correct command parsing to solve File name too long & FileNotFound

[shaishaicookie]

Fix command parsing issues by using shlex.split to properly handle command parsing

Description of the Issue

1. When both the audio file and the srt files are under the same directory as the stable_whisper.encode_video_comparison script is executed, [Errno 63] File name too long error occurs on macOS.

2. When both the audio file and the srt files are not under the same directory as the stable_whisper.encode_video_comparison script is executed, FileNotFound error occurs due to incorrect command parsing

Reproduce

https://github.com/shaishaicookie/stable-ts/tree/reproduce-error-encode_video_comparison/reproduce_error

When running python reproduce_error.py, the following error occurs:

ffmpeg -n -f lavfi -i color=size=720x90:rate=25:color=black -f lavfi -i color=size=720x3:rate=25:color=white -i "audio.mp3" -filter_complex "[0]drawtext=text='FileNameTooLong':fontcolor=white:fontsize=14:x=10:y=10[a0],[a0]subtitles='audio.srt':force_style='Fontsize=70'[b0],[0]drawtext=text='FileNameTooLong':fontcolor=white:fontsize=14:x=10:y=10[a1],[a1]subtitles='audio.srt':force_style='Fontsize=70'[b1];[b0][1][b1]vstack=inputs=3" -shortest "FileNameTooLong.mp4"
**** An error occurred ****
**** When input files are under same dir as this script ****
[Errno 63] File name too long: 'ffmpeg -n -f lavfi -i color=size=720x90:rate=25:color=black -f lavfi -i color=size=720x3:rate=25:color=white -i "audio.mp3" -filter_complex "[0]drawtext=text=\'FileNameTooLong\':fontcolor=white:fontsize=14:x=10:y=10[a0],[a0]subtitles=\'audio.srt\':force_style=\'Fontsize=70\'[b0],[0]drawtext=text=\'FileNameTooLong\':fontcolor=white:fontsize=14:x=10:y=10[a1],[a1]subtitles=\'audio.srt\':force_style=\'Fontsize=70\'[b1];[b0][1][b1]vstack=inputs=3" -shortest "FileNameTooLong.mp4"'

ffmpeg -n -f lavfi -i color=size=720x90:rate=25:color=black -f lavfi -i color=size=720x3:rate=25:color=white -i "audio/audio.mp3" -filter_complex "[0]drawtext=text='FileNotFoundError':fontcolor=white:fontsize=14:x=10:y=10[a0],[a0]subtitles='audio/audio.srt':force_style='Fontsize=70'[b0],[0]drawtext=text='FileNameTooLong':fontcolor=white:fontsize=14:x=10:y=10[a1],[a1]subtitles='audio/audio.srt':force_style='Fontsize=70'[b1];[b0][1][b1]vstack=inputs=3" -shortest "FileNotFoundError.mp4"
**** An error occurred ****
**** When input files are not under same dir as this script ****
[Errno 2] No such file or directory: 'ffmpeg -n -f lavfi -i color=size=720x90:rate=25:color=black -f lavfi -i color=size=720x3:rate=25:color=white -i "audio/audio.mp3" -filter_complex "[0]drawtext=text=\'FileNotFoundError\':fontcolor=white:fontsize=14:x=10:y=10[a0],[a0]subtitles=\'audio/audio.srt\':force_style=\'Fontsize=70\'[b0],[0]drawtext=text=\'FileNameTooLong\':fontcolor=white:fontsize=14:x=10:y=10[a1],[a1]subtitles=\'audio/audio.srt\':force_style=\'Fontsize=70\'[b1];[b0][1][b1]vstack=inputs=3" -shortest "FileNotFoundError.mp4"'

[YeDaxia]

感谢您的来信，我会尽快阅读的。 Thanks, I would read it as soon as possible~