Ffmepg usage guide

1、//Ubuntu Lower installation ffmpeg
sudo apt update
sudo apt install ffmpeg
// Verify the installation , Please use the following ffmpeg -version command , The command shows FFmpeg edition
ffmpeg -version

2、 To print all available FFmpeg The encoder and decoder of

Please enter ：
ffmpeg -encoders ( Commonly used to recode )
ffmpeg -decoders
// Inquire about ffmpeg Which container formats are supported
ffmpeg -formats
// Inquire about ffmpeg Which codec formats and codec names are supported
ffmpeg -codecs
// Basic conversion
When using to convert audio and video files ffmpeg, It is not necessary to specify input and output formats . The input file format is automatically detected , And guess the output format from the file extension .
Remove video files from mp4 Convert to webm：
ffmpeg -i input.mp4 output.webm
Remove audio files from mp3 Convert to ogg：
ffmpeg -i input.mp3 output.ogg​
The encoding of a video is MPEG4, Want to use H264 code
ffmpeg -i input.mp4 -vcodec h264(or libx264) H264_output.mp4  //input.mp4 It refers to the address of the video to be converted ;output.mp4 Is the storage path of the converted video
ffmpeg -i input.mp4 -vcodec libx265 H265_output.mp4
ffmpeg -i input.3gp -vcodec h263 H263_output.3gp           //H263
ffmpeg -i input.webm -vcodec libvpx-vp9 vp9_output.webm
ffmpeg -i input.webm -vcodec libvpx vp8_output.webm
The same is true
ffmpeg -i input.mp4 -vcodec mpeg4 output.mp4
// Frame rate conversion 60 frame
ffmpeg -i 123.mp4 -r 60 456.mp4

//ffmpeg- Modify resolution
ffmpeg -i video_1920.mp4 -vf scale=640:360 video_640.mp4 -hide_banner
ffmpeg -i 4K_120fps_2160-3840.mp4 -vf scale=4096:2160 4k_120fps_4096-3840.mp4 -hide_banner

3、ffmpeg extract mp4 Audio in file , Save as wav file

（1）ffmpeg -i 123.mp4 -acodec pcm_s16le -f s16le -ac 1 -ar 16000 -f wav 123.wav

This creates a wav file , Designated as 16 position 、 Mono 、 The sampling rate is 16k.

among -f wav Is essential , Didn't it , It's generated pcm data , Instead of wav, Pay special attention here .

（2） If you only want to get the original pcm file , You can use the following command ：

ffmpeg -i 123.mp4 -acodec pcm_s16le -f s16le -ac 1 -ar 16000 123.pcm

（3）ffmpeg Extract from the video WAV Format audio ：

ffmpeg -i .[ Thunder download xunbo.cc] Love apartments Season 2 EP20.rmvb -f wav -ar 16000 2-20.wav

4、ffmpeg Convert other formats of audio to wav Format ：

ffmpeg -i 'THE_CROODS__A_NEW_AGE.AC3 5.1 channel .mka' -acodec pcm_s16le -f s16le -ac 6 -ar 48000 -f wav 123.wav