从具有FFMPEG的视频中提取音频，但持续时间不同

Question

My problem is that i need to extract with FFMPEG the audio contained in a video with the same duration. But for some files that i tested, the audio's duration is sometimes shorter than the video's duration. I need to have the exact same duration between the audio and the video file.

The command that i have already tried is this following:

ffmpeg -i input_video.mp4 output_audio.wav

How can i fix this with options in my command ?

Answer 1

I found the solution. To get an audio extract with the exact same length. I use the option -async 1 like this:

ffmpeg -i input_video.mp4 -async 1 output_audio.wav