ffmpeg -i /path/to/original/video.mp4 -vf subtitles=/path/to/subtitles.ass /path/to/video.mp4
ffmpeg -protocol_whitelist file,http,https,tcp,tls,crypto -i "https://embedwistia-a.akamaihd.net/deliveries/bb7d4b29e88178fdd5c6839aa15adadbcb904218.m3u8" -c copy video.mp4
ffmpeg -i video.srt video.ass
ffmpeg -i video.mp4 -vf ass=video.ass video-sub-es.mp4
youtube-dl -g youtube_link_org
ffmpeg -ss 00:00:00.00 -i "audio_or_video_stream_path" -t 00:00:60.00 -c copy output.mp4
ffmpeg -i video.mp4 -i audio.wav -c:v copy -c:a aac output.mp4
ffmpeg -i in.mp4 -filter:v "crop=out_w:out_h:x:y" out.mp4