Imported video has loud static for a second, then no audio

I have imported a video clip into Davinci Resolve, but instead of the expected audio it has a big burst of loud static and then no audio for the rest of the clip. Below is a screenshot of the audio waveform:

Screenshot of the audio waveform

Screenshot 2024-04-28 102607.png (172.34 KiB) Viewed 213 times

And below is the audio waveform in Audacity:

Audacity screenshot

Screenshot 2024-04-28 102802.png (27.6 KiB) Viewed 213 times

And it plays just fine in both Audacity and VLC.

Is there a way to stop the static?

Here's some more information:

• Windows 11
• Davinci Resolve 16.8.1 build 8
• Footage shot with a Polaroid Cube+
• File is an MP4
• Video is 1920x1080 @ ~8Mbps and 29.97 fps
• Audio is 128kbps stereo with 16kHz (!) sampling rate according to Windows, but Audacity reports 48kHz

I will double-post to give a workaround:

I was able to use ffmpeg to change the sample rate of the original video: https://superuser.com/questions/253467/ ... o-44100-hz

I used the command

Code: Select all

ffmpeg -i originalClip -ar 48000 outputClip

. I was then able to import the new clip and use it as intended.

However, this is not a solution. It is merely a workaround. I suspect it may be due to the extremely low audio sample rate.

I am not an audio guy, but my understanding of Nyquist is that you need to sample at twice the highest frequency of interest. A 16 KHz sample rate means your highest frequency is 8 KHz which is in the range of old-school voice telephony. CD audio is around 44 KHz so I am not surprise Resolve might be confused by the lack of data.

Thanks for the followup. And three cheers for ffmpeg!