With 1.9.0 Decklink in progressive mode, ghost frame can appear

[pcossinet]

Describe the bug Using Plugin 1.8.6 Decklink output is OK on a Windows 10 config. After 1.9.0 upgrade, sometimes there is a "ghost frame" that can appear sometimes. Works really perfectly on Windows 10 with Plugin 1.8.6 Decklink

The problem is here only with 1080p50 and 1080p25, no "ghost frame" in 1080i50. Perhaps it come from double framerate for interleaved mode ?

Your Setup (please complete the following information):

• Unity version: Unity version: 2020.3.12f1
• AVPro DeckLink version: AVPro DeckLink version: 1.9.0
• Operating system version: Windows 10
• Hardware model: i9-10900X, 32Go RAM, RTX 3080
• Desktop Video version: 12.0
• Video mode (resolution, frame-rate, pixel-format): 1080p50 & 1080p25

To Reproduce Steps to reproduce the behavior:

1. Choose 1080p50 or 1080p25 SDI output
2. Play various graphics
3. Sometimes a "ghost" image appear on monitor

Screenshots

Videos https://user-images.githubusercontent.com/64129152/138226528-00782c3e-488a-43a9-b336-6f23e5a1127f.mp4

[RichRH]

Hi @pcossinet,

Thanks for your bug report. I've been trying to reproduce this issue, matching your setup as closely as I can (1 x 1080i50 + 3 x 1080p50), but so far without luck - would you mind answering the following questions?

1. I'm testing using our '05_OutputDemo' scene by duplicating the 'OutputCamera'/'DeckLink' objects 3 times and setting each one to a unique 1080i50/1080p50 device index - would you be able to try this and see if you still get the ghosting?
2. Is the content you're outputting purely a video or more generative? If a video, what are you using for playback?
3. Just to be sure, your DeckLink outputs are continuously running (i.e. you're not stopping/starting them in anyway) and you're not using any inputs in the above video? (Or maybe any particular non-default 'DeckLinkOutput' component flags?)

Hopefully the above can help us narrow it down.

Cheers,

[Chris-RH]

Could not reproduce. Please reopen if this is still an issue.