I'm trying to analyze a spectrogram while simultaneously checking the video, without having to switch between them. Something like this, but with the video combined in the same output:
The idea is to be able to scrub through both video and the spectrogram so that they're synced. Most editing software only lets me see the waveforms. The command I used for that is as follows:
ffplay -f lavfi 'amovie=/Users/hdl/Desktop/HDLS3K.mp4, asplit [a][out1]; [a] showspectrum=size=1280x512:mode=separate:slide=scroll [out0]'