Audio frequency spectrum of a video at a given time

Question

Is there a simple way to get the audio frequency spectrum at a given time of a video?

My motivation is the following: I was wondering if it is possible to "measure" the Doppler shift from YouTube videos like this using only my laptop.

Answer 1

Meanwhile I found the following solution:

1. Launch audacity
2. Open your video file say video.flv Alternatively you can use ffmpeg to extract the audio: ffmpeg -i video.flv audio.wav and open in audacity audio.wav
3. Select a region of the waveform
4. Go to Analyze – Plot Spectrum

I think it is helpful to set the axis to Log frequency and use the largest value for size so select relevant peaks.