Blackmagic Forum

Just upgraded to Studio and downloaded the 17 beta that's on the download page so I could play with my new Speed Editor. I was stabilizing a video clip, the sound worked fine, and as I was playing it back the sound just blinked out. The sound is still there in the source clip but re-importing and re-linking it don't help.

Waveforms looked blank. I turned up the track volume and still nothing. I didn't change anything on the Fairlight page and can't find any place where the audio, track audio, or computer audio are low or muted. Sound is fine in other applications. Any ideas of things I can look for? I've tried the videos I've seen on YouTube; none of them seem to apply.

Mac OS 10.15.2 on a 2017 MacBook Pro with EGPU. Happy to provide more detail as needed. I don't want to be a complainer, but I do music videos and people tend to like having sound on 'em.

I exported the project just for fun, and there is no audio in the exported file.

(also, to be clear: I have tried turning it off and back on again.)

The plot thickens! I open other files and the audio is fine.

Is there any way the stabilization could have impacted the audio tracks?

Soooo I guess I'm talking to myself in here, but for the record, I redid this: same clip, same process, same everything, and it worked just fine. ¯\_(ツ)_/¯

Stabilisation should have no effect.
if you find a reliable way to repo please report again.

PDXHolly wrote:I'm talking to myself in here

Your original post was made after 9PM my time. Given such time differences, forum solutions can often take days.

I am having the exact same issue with mp4 file. On two machines. I use Studio version, my wife uses free version. Both having the same issue with the same video clip on mp4 format. We can hear the video fine in many other programs. As we bring it to the timeline in DR, there is no sound. The mixer does not move. We import another mp4 clip to the same timeline, place it side by side and it plays fine with sound. Tried converting to .mov. Same issue. Only with these two clips. They were recorded on cellphone. Again, plays fine on the phone, on VLC.

You must remember, Resolve was never designed to accept the variable frame rate that phones typically generate. It was designed for formats with a constant frame rate. If the frame rate of the video is constantly varying Resolve has to try and keep the audio in step with it by altering the sample rate of the audio stream in realtime. If the video frame rate is changing dramatically Resolve will simply not play the audio. Simple players like VLC, and more consumer orientated editing programs such as Pinnacle Studio are designed to cope with this.
In time this may be addressed by BMD.
In the meantime try converting phone footage to a constant frame rate using either Shutter Encoder or Handbrake, both of which are free.

Thank you very much for your reply, Charles. Will try that.

Hi all

A link where we can download and examine a log archive (from the Help menu), a sample clip (that you see these issues with) and a detailed description of hardware, OS, drivers etc (see FAQs) would help.

In the same FAQs, you can find a list of supported codecs that you can refer to and make decisions on your recording format based on your OS and hardware.

Thanks
Shrinivas