A chance cursor movement screws up audio sync.

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PalmerWoodrow

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A chance cursor movement screws up audio sync.

PostTue May 08, 2018 12:12 am

When attempting to sync a video and audio file in the Media Pool, my effort was repeatedly thwarted by the viewer scrubbing all over the place.

To sync files, you have to position the footage in the viewer, and the audio in the waveform display next to it. But simply rolling the cursor across a thumbnail in the gallery causes the viewer to jump to a different position for some reason, even if it's not the clip in the viewer. Hell, even accidentally dragging the cursor over an audio file will cause the video in the viewer to scrub... breaking the sync you're trying to set up.

Thumbnail scrubbing should never affect the viewer, even if it belongs to the same clip. We have the viewer's scrub bar for that.

Screen grab showing the viewer scrubbing for no reason while cursor rolls over thumbnails:



Also (probably related), the viewer will often show the wrong filename:
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Shrinivas Ramani

Blackmagic Design

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Re: A chance cursor movement screws up audio sync.

PostTue May 08, 2018 5:47 am

There is an option to turn off Live Previews in the viewer's context drop down on the top right.
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PalmerWoodrow

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Re: A chance cursor movement screws up audio sync.

PostWed May 09, 2018 8:58 am

Thanks for that reply.

Is that suggestion a workaround until the bug is fixed?
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Shrinivas Ramani

Blackmagic Design

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Re: A chance cursor movement screws up audio sync.

PostWed May 09, 2018 9:17 am

The Live Preview controls how thumbnails are previewed on the viewer. If you prefer to have it on, the preview (and clip name) restores to your previously loaded viewer clip once your mouse is outside the thumbnail.

Unless I've misunderstood your original description, this is the intended behaviour for Live Previews.
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PalmerWoodrow

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Re: A chance cursor movement screws up audio sync.

PostWed May 09, 2018 9:30 am

The thumbnails aren't being previewed in the viewer; the viewer isn't showing the video that I'm rolling over in the gallery. Please examine the screen grab.

The viewer is scrubbing the same video (the one I'm trying to sync), regardless of which thumbnail I'm rolling over with the cursor. For example, if the cursor happens to roll across an audio file, the video file in the viewer is scrubbing.

Aside from the clearly defective behavior it's currently exhibiting, this feature would be OK if, once the cursor left the thumbnail, the video in the viewer were restored to its previous position. Rolling the cursor around the screen should never change the playhead position within the clip that's actually loaded in the viewer (even if I roll over that clip's thumbnail). Doing so messes up the operation you're trying to perform.
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Shrinivas Ramani

Blackmagic Design

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Re: A chance cursor movement screws up audio sync.

PostWed May 09, 2018 9:42 am

Thank you for the report. We can now see the issue.

Please consider turning off the Live Preview as a workaround for now.
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PalmerWoodrow

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Re: A chance cursor movement screws up audio sync.

PostWed May 09, 2018 6:11 pm

Thanks, Shrinivas. That workaround will help a lot.

One other issue I noticed: The Media Pool gives no indication of which clips are in the viewer and the audio waveform display. It would be great if they were highlighted. The lack of highlights makes thumbnail view pretty impractical, because you can't read the filename (the label under the thumbnail is too short) and there's no ToolTip. But those are too tedious anyway; the clips that are loaded into the viewer and the audio panel should simply be highlighted, so you can be sure you're linking the correct files.

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