AAC Audio 128kbit, h264 Video CRF 23: ffmpeg -i input_video.avi -codec:audio aac -b:audio 128k -codec:video libx264 -crf 23 output_video.mp4 Trim a video from a given start time mm:ss to an end time mm2:ss2 (omit the -to flag to trim till the end): ffmpeg -ss mm:ss -to mm2:ss2 -i video.mp4 -codec copy output.mp4.

Quickly extract a single frame from a video at time mm:ss and save it as a 128x128 resolution image: ffmpeg -ss mm:ss -i video.mp4 -frames 1 -s 128x128 -f image2 image.png.Combine numbered images ( frame_1.jpg, frame_2.jpg, etc) into a video or GIF: ffmpeg -i frame_%d.jpg -f image2 video.mpg|video.gif.Save a video as GIF, scaling the height to 1000px and setting framerate to 15: ffmpeg -i video.mp4 -vf 'scale= -1: 1000' -r 15 output.gif.Extract the sound from a video and save it as MP3: ffmpeg -i video.mp4 -vn sound.mp3.There are shortcuts too, -map 0:v selects all the video type streams as -map 0:a does for audio type streams. Processing what you mapped is done sequentially, -map 0:0 is the video stream and was my first map so once I had finished mapping the first action was going to be run on this video stream. Keeping only the video, English audio and subtitles however encode the video (fast crf 25): ffmpeg -i inputfile.mkv -map 0:0 -map 0:1 -map 0:2 -c:v libx264 -preset fast -crf 25 -c:a copy -c:s copy english-output.mp4 Making a French only audio copy with: ffmpeg -i inputfile.mkv -map 0:3 french-audio.mp3 Ī simple FFmpeg map example to create an audio only and then a video only copy from the input: ffmpeg -i inputfile.mkv -map 0:1 audio.mp3 -map 0:0 video.mp4īecause Stream #0:1 is the audio stream and #0:0 is the video stream. You will see (depending on your input file) multiple streams, they look like: Stream #0:0: Video: hevc. Run ffmpeg -i inputfile to see all the information about the media.

Video usually has different streams for quality when it is a live stream. Streams means video, audio, subtitles, attachments and data within the file this is rather complex on movie files where there could be multiple audio streams for different languages and the same for subtitles. Map in FFmpeg can be best understood as selecting streams within a file you want to encode, keep or remove when creating an output.

Ffmpeg map encoded