marcoc2 / ffmpeg-notes

FFmpeg command list

FFmpeg_notes

FFmpeg command list

".vid" = Any video format supported ".aud" = Any audio format supported

Resize

ffmpeg -i input.vid -vf scale=$w:$h -vf format=yuv420p output.vid

Insert audio on video

$ ffmpeg -i a_input.aud -i v_input.vid -codec copy -shortest v_output.vid

Comments: Seems not to work if you put the audio file as the second input parameter

Remove audio from video

$ ffmpeg -i input.vid -c copy -an output_noaudio.vid

Extract audio from video

$ ffmpeg -i input.vid -c copy -vn -acodec copy audio.aac

Concatenate video files

$ ffmpeg -f concat -safe 0 -i v_input1.vid -i v_input2.vid -c copy v_output.vid

Crop video (in frame dimension)

$ ffmpeg -i input.mp4 -filter:v "crop=80:60:200:100" -c:a copy output.mp4

80:60 - Crop window size in pixes

200:100 - Starting from x=200, y=100 (on original image)

Cut video (in lenght)

$ ffmpeg -i input.vid -ss 00:00:03 -t 00:00:08 -async 1 output.vid

ss - Video start time

t - Lenght of the part to be cut

Repeat video with reverted version (vai e volta)

Without audio

$ ffmpeg -i input.mp4 -filter_complex "[0:v]reverse,fifo[r];[0:v][r] concat=n=2:v=1 [v]" -map "[v]" output.mp4

With audio

$ ffmpeg -i input.mp4 -filter_complex "[0:v]reverse,fifo[r];[0:v][0:a][r] [0:a]concat=n=2:v=1:a=1 [v] [a]" -map "[v]" -map "[a]" output.mp4

Convert ogv to mp4

$ ffmpeg -i input.ogv -c:v libx264 -preset veryslow -crf 22 -c:a libmp3lame -qscale:a 2 -ac 2 -ar 44100 output.mp4

Convert avi to mkv

$ ffmpeg -fflags +genpts -i input.avi -c:v copy -c:a copy output.mkv

Tirar "-c:v copy" e "-c:a copy" para refazer o enconding

MP3 to MP4 with Image

$ ffmpeg -loop 1 -i image.png -i audio.mp3 -c:a copy -c:v libx264 -shortest video.mp4

Convert video to gif

This example will skip the first 30 seconds of the input and create a 3 second output. It will scale the output to be 320 pixels wide and automatically determine the height while preserving the aspect ratio. The palettegen and paletteuse filters will generate and use a custom palette generated from your source. (source: https://superuser.com/questions/556029/how-do-i-convert-a-video-to-gif-using-ffmpeg-with-reasonable-quality)

Generate a palette:

$ ffmpeg -y -ss 30 -t 3 -i input.flv -vf fps=10,scale=320:-1:flags=lanczos,palettegen palette.png

Output the GIF using the palette:

$ ffmpeg -ss 30 -t 3 -i input.flv -i palette.png -filter_complex "fps=10,scale=320:-1:flags=lanczos[x];[x][1:v]paletteuse" output.gif

Other option

$ ffmpeg -i video.avi video.gif -hide_banner

Create video from folder with images

$ ffmpeg -r 5 -i filename_%02d.jpg -c:v libx264 -vf fps=25 -pix_fmt yuv420p out.mp4

-r images per second

%02d regular expression forming strings starting from 00, 01, 02, 03...