煎炸熊の記事本

simply convert video files from MKV to MP4

ffmpeg -i in.mkv -movflags +faststart -codec copy out.mp4

convert to HD 720P/1080P

ffmpeg -i in.mp4 -s hd720 -profile:v baseline -vf format=yuv420p out.mp4
ffmpeg -i in.mp4 -s hd1080 -profile:v baseline -vf format=yuv420p out.mp4

convert to h.265

ffmpeg -i in.mp4 -vcodec libx265 -crf 28 out.mp4

convert all files to h.265

find . -type f -exec ffmpeg -i "{}" -vcodec libx265 -crf 28 "{}".h265.mp4 \;

crop a video 80×60 section, starting from position (200, 100)

ffmpeg -i in.mp4 -filter:v "crop=80:60:200:100" -c:a copy out.mp4

cut the videos based on start and end time (timing format: hh:mm:ss)

ffmpeg -ss 00:01:00 -i in.mp4 -to 00:01:17.5 -c copy out.mp4
ffmpeg -ss 00:01:00 -i in.mp4 -t 00:00:17.5 -c copy out.mp4
ffmpeg -ss 00:01:00 -i in.mp4 -t 17.5 -c copy out.mp4

Use ffmpeg to add text subtitles
How to Add Font size in subtitles in ffmpeg video filter
How to set background to subtitle in ffmpeg?
How to Add Subtitles to a Video with FFmpeg (5 Different Styles)

ffmpeg -i in.mp4 -vf subtitles="in.vtt:force_style='OutlineColour=&H80000000,BorderStyle=4,Fontsize=24'" out.mp4

Download m3u8 streaming to mp4
set useragent in ffmpeg

ffmpeg -user_agent "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3554.0 Safari/537.36" -headers "origin: https://XXXXXXX.com" -headers "referer: https://XXXXXXX.com/XXXXXXX"  -y -re -i 'https://XXXXXXX.com/XXXXXXX.m3u8' -c copy -bsf:a aac_adtstoasc -- XXXXXXX.mp4

change framerate

ffmpeg -i in.mp4 -filter:v fps=fps=30 out.mp4

Concatenate two MP4 files
Merge two videos without re-encoding

# Create File List
echo file file1.mp4 >  mylist.txt 
echo file file2.mp4 >> mylist.txt
echo file file3.mp4 >> mylist.txt

# Concatenate Files
ffmpeg -f concat -i mylist.txt -c copy out.mp4