问题
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 ?
回答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
来源：https://stackoverflow.com/questions/29261283/extract-audio-from-video-with-ffmpeg-but-not-the-same-duration