How do I download youtube videos for a specified time period

[GuanghuiSong]

Checklist

• [ x] I'm asking a question
• I've looked through the README and FAQ for similar questions
• I've searched the bugtracker for similar questions including closed ones

Question

Can someone help me, please

[GuanghuiSong]

I have used the following two forms of parameters, neither of which worked
ydl_opts = {
'path':"/home/sgh/code/Text-To-Video-Finetuning/datasets/download_videos",
'outtmpl':caption,
'merge_output_format':'mp4',
'format':format_id,
'skip_download':False,
'quiet':True,
"download_ranges": download_range_func(None, [[start_time, end_time]] ),
"force_keyframes_at_cuts": True
}
and

ydl_opts = {
'path':"/home/sgh/code/Text-To-Video-Finetuning/datasets/download_videos",
'outtmpl':caption,
'merge_output_format':'mp4',
'format':format_id,
'skip_download':False,
'quiet':True,
"external_downloader": "ffmpeg",
"external_downloader_args": {"ffmpeg_i": ["-ss", str(start_time)."-to", str(end_time)]},
}

[dirkf]

[ ] I've searched the bugtracker for similar questions including closed ones

Why do you think this checklist item is there? #30839, #4821, #31448 (comment).