The youtube-dl downloaded file was 8.52 seconds long (off by 1.52s). I compared the extracted clips produced above against the expected duration (37s-44s = 7s duration). Result: yt-dlp was 76x more accurate than youtube-dlĪ faster method is not necessarily better if the result is worse in its accuracy. I imagine the factor could change for different circumstances, but it's a promising signal. So by that simple benchmark it's 20 times faster! Then I ran it the way I'm suggesting, using yt-dlp: time yt-dlp -f best -download-sections "*0:00:37-0:00:44" -force-keyframes-at-cuts Result: yt-dlp was 20x faster than youtube-dlįor benchmarking, I ran the other answer's example below: time ffmpeg -ss 00:00:37 -to 00:00:44 -i "$(youtube-dl -f best -get-url '')" -c:v copy -c:a copy coffee_sliding.mp4 I also passed the -extract-audio -audio-format mp3 options and checked the true length of the resulting file with ffprobe: ffprobe extracted_clip.mp3 2>&1 | grep Durationĭuration: 00:00:30.02, start: 0.023021, bitrate: 68 kb/s Its timing is accurate ("albeit slower") when given the -force-keyframes-at-cuts option: yt-dlp -download-sections "*1:00:00-1:00:30" -force-keyframes-at-cuts FFmpeg: Seeking A solid outline of seeking, cutting and the correct time unit syntaxĪ nice alternative not shared here is yt-dlp, a fork of youtube-dl which is far less held back by rate throttling.youtube-dl Download Range: Great discussion of the possibilities, some a little misguided :).I have tested this extensively with YouTube and all works well on my own system. -t 00:00:30: This specifies the duration of the encode, in this case 30 seconds only.This is slower and less efficient than placing the seek options before the input file ( input seeking) but works better in this example (in particular when copying audio and video streams) -ss 00:00:10: Placed after the input file this encodes and discards samples up until the 10 second mark.The 2 sections which govern the clip start and end in this example are: One fairly basic technique is the following one liner which works well enough on my system with a YouTube clip: ffmpeg -i $(youtube-dl -f 18 -get-url ) \
There is indeed a plethora of techniques available online to accomplish this.
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