FFmpeg

Information

Program info

See FFmpeg version and compile flags:
```
  ffmpeg -version
```
Show supported decoders:
```
  ffmpeg -decoders
```
Show supported encoders:
```
  ffmpeg -encoders
```
Show supported demuxers and muxers:
```
  ffmpeg -formats
```
Show supported filters:
```
  ffmpeg -filters
```
Show supported codecs:
```
  ffmpeg -codecs
```
Show supported protocols:
```
  ffmpeg -protocols
```
Show available sources:
```
  ffmpeg -sources
```

File info

Get information about file:
```
  ffmpeg -i input.mp4 -hide_banner
```

Converting

Convert from MP4 container to MKV:
```
  ffmpeg -i input.mp4 output.mkv
```

Copy everything but re-encode audio:

  ffmpeg -i input.mp4 -map 0 -c copy -c:a libmp3lame output.mp4

Copy everything but re-encode video:

  ffmpeg -i input.mkv -map 0 -c copy -c:v mpeg2video output.mkv

Extracting

Create sample of 2 minutes:

  ffmpeg -ss 00:10:00 -i input.mp4 -t 00:02:00 output.mp4

Extract audio track only from video file:
```
  ffmpeg -i input.mp4 -vn audio.mp3
```
Extract video track only from video file:
```
  ffmpeg -i input.mp4 -an video.mp4
```

Extract video, audio and subtitle to separate files:

  ffmpeg -i input.mkv -map 0:0 video.mkv -map 0:1 audio.mkv -map 0:2 subtitle.srt

Extract and convert WebVTT subtitle to SubRip format:

  ffmpeg -txt_format webvtt -i input.mkv subtitle.srt

Extract and convert multiple WebVTT subtitles to SubRip format:

  ffmpeg -txt_format webvtt -i input.mkv -map 0:2 subtitle.spa.srt -map 0:3 subtitle.eng.srt

Modifying

Add subtitles to a video (with appropriate metadata):

  ffmpeg -i input.mp4 -i subtitle.spa.srt -i subtitle.eng.srt -map 0 -map 1 -map 2 -metadata:s:s:0 language=spa -metadata:s:s:1 language=eng -c copy output.mp4

Change resolution of video:

  ffmpeg -i input.mp4 -filter:v scale=1280:720 output.mp4

Crop video:

  ffmpeg -i input.mp4 -filter:v crop=640:480:100:100 output.mp4

Splitting and joining

Split video file into multiple parts of 20 seconds each:

  ffmpeg -i input.mp4 -map 0 -c copy -segment_time 00:20:00 -f segment -reset_timestamps 1 output%03d.mp4

Join multiple video files into one:

  printf "file '%s'\n" ./input*.mp4 > mylist.txt && ffmpeg -f concat -safe 0 -i mylist.txt -c copy output.mp4

Combine two videos in split screen (side by side):

  ffmpeg -i left.mp4 -i right.mp4 -filter_complex hstack output.mp4