

I'll then use map to map the video 0:v and audio 1:a (0 means first input, which is the video and 1 means the second input, which is the audio) and then choose my encoding options. I wanted to cut from 43:00 to 50:10 so I'm going to do -ss 42:30 (giving me a few seconds to catch a good keyframe) on both inputs and then do a -ss 30 after the inputs to start at 43:00. Video youtube-dl -youtube-skip-dash-manifest -g

Here's a real example using one of my youtube videos. I also recommend doing it about 30 seconds earlier and then using another -ss 30 to avoid losing any key frames. You'll need to use the -ss option for each stream. Use youtube-dl -youtube-skip-dash-manifest -g "URL" to get the video and audio streams.
