However, if the first frame is not a keyframe, then the frames before the first keyframe in the clip will not be playable. We used the -force_key_frames option because video clipping occurs at keyframes.

Finally, it will carry out an audio correction to match the timestamp and re-encode the video with the original my_video.mp4 codec.Īlternatively, if we need a more time-accurate cut, we can manually add the keyframes to the start and end of the clipped video: $ ffmpeg -i my_video.mp4 -force_key_frames 00:00:15,00:00:25 clip.mp4 The value of -t is added to the sought timestamp, which is 15 seconds. The command above will process the my_video.mp4 input file and seek 15 seconds forward in the video. The value 1 will correct the start of the stream without any later correction. The -async option specifies whether to contract or stretch the audio to match the timestamp.The -t argument is used to specify the duration of the clip.The -ss argument seeks to the timestamp specified as the argument.

The -i argument is used for specifying input files.Now, let’s review each of the options and arguments we used here: Video:5132kB audio:157kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.167893%

Ffmpeg crop video