Hyperdeck Studio MXF files: audio out of sync in Avid

[Chris North]

We have now discovered that the HyperDeck itself is not maintaining sync. This is capturing via HDMI from a Sony Camcorder at 1080i, 30fps. Same thing if we capture from a PC’s HDMI output. Playback on the device reveals audio is drifting. The recording format is MXF. The OCZ disks that Blackmagic recommend will not record uncompressed (not fast enough) so I can’t test that.

[Andreas Wojtaschek]

I can confirm that.

We had an event yesterday that was recorded on our new Hyperdeck Studio as DNxHD MXF file.

The event was about 90mins long. After 90min the audio was about 2-4sec off sync. We discovered that when we imported the footage into out Avid MC6 system.

Tomorrow I will test if the drifting occurs when I playback the file in the Hyperdeck itself. I’ll report that when I did the test.

Regards

Andreas

—

Entertainment Producer IHK
mindandvision

[Joshua Helling]

This issue has actually be confirmed with 1080p30 formats by our engineers and we’ve logged it in our bug system.

Sincerely,

Joshua
Director of Support
Blackmagic Design Inc.

[Andreas Wojtaschek]

For me this issue occured with 1080i50. SO it is not only a 1080p30 problem.

Regards

Andreas

—

Entertainment Producer IHK
mindandvision

[Chris North]

Hi Joshua,

Many thanks – that’s great it’s going to be looked into. I should point out that other resolutions also appear to have the issue, but hopefully this bug fix will address those too.

thanks again!

chris

[Andreas Wojtaschek]

BTW.

The new Beta2 firmware is available now on the Blackmagic Hompage. Just saw that they put the new version online.

Regards

Andreas

—

Entertainment Producer IHK
mindandvision

[Chris North]

Hi Andrea,

Did you try the update? I’ve installed it on the Hyperdeck here and the problem is WORSE. Interested in whats happening on yours?

chris

[Andreas Wojtaschek]

Hi Chris,

too bad to hear that this issue is not solved with Beta2. I will install the new firmware today and report what happens with our Hyperdeck. I’m in 50Hz land (Germany) too, so I don’t expect any other results than you. Too bad!

Regards

Andreas

—

Entertainment Producer IHK
mindandvision

[Kristian Lam]

Hi Chris,

For the audi to o be ahead of the video in this instance, there must be dropped video frames happening. Can you please let me know if the record light on the unit is flashing while you’re recording? This will indicate dropped frames. Thanks.

regards

Kristian Lam
Blackmagic Design

[Chris North]

Hi there,

The device seems to record ok, and there is no flashing light to indicate dropped frames or problems with the disk. I have also tried reformatting the disk but the issue remains.

chris