[FFmpeg-user] Why do these blank spots appear in spectrograms of converted youtube videos?
Paul B Mahol
onemda at gmail.com
Fri Jan 6 14:09:49 EET 2017
On 1/6/17, Ethan Lewis <dummycommandline at gmail.com> wrote:
> I was converting a bunch of youtube videos into 16kHz wav files using ffmpeg
> I used the following commands
> youtube-dl -f best /path/to/youtube/video/ -f 'bestvideo,bestaudio' -o
> ffmpeg -i /path/to/download/m4a/audio -acodec pcm_s16le -ar 16000 -ac
> When I use these youtube videos
> I see many blank spots in their spectrograms (see the ones uploaded here
> Natural speech should not have such artefacts.
> I am confused why this is happening. Is it because of ffmpeg conversion of
> m4a audio OR was it somehow fault of the original recording?
Have you compared with original audio? prior to resampling with ffmpeg?
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