Automatic Proxy Creation Stopped Working

[ssoher]

Windows 10 22H2 Build 19045.3930; Shotcut 24.0.1.28

I have manually deleted some proxy files through Windows explorer and now proxy creation doesn't fire automatically. It was working fine before that.

Upon clicking Settings->Proxy->Use Proxy I get the "Do you want to create missing proxies for every file in this project" dialog. Upon clicking yes nothing happens but the Proxy is ON at 540p label is shown on the UI. There are no proxies in the proxy path (Checked with Proxy->Storage->Show option).

shotcut-log.txt contains the following lines when I click yes on the missing proxy creation dialog:

[Debug  ] <ProxyManager::GoProProxyFilePath> "D:/art/breakout/trailer/source/GLOXY_TEST.LRV" 
[Debug  ] <ProxyManager::isValidVideo> pix_fmt = "yuv420p"  codec.frame_rate = ""  alpha_mode = false 
[Debug  ] <ProxyManager::generateIfNotExists> 640 x 1080 threshold 702 
[Debug  ] <ProxyManager::GoProProxyFilePath> "D:/art/breakout/trailer/source/GLOXY_TEST.LRV" 
[Debug  ] <ProxyManager::isValidVideo> pix_fmt = "yuv420p"  codec.frame_rate = ""  alpha_mode = false 
[Debug  ] <ProxyManager::generateIfNotExists> 640 x 1080 threshold 702 

I guess it thinks the proxies already exist and exit early from the proxy generation function?

Things I have tried:

• Create fresh project
• Completely remove (appdata and cache folders as well as the program itself) and reinstall Shotcut with delete registry settings option checked
• Try an older version of Shotcut

Proxies only get generated and applied if I manually create a proxy for each clip in their Properties panel. Otherwise like I said the label Proxy is ON at 540p is shown but there is no P tag on the clips, there is no (Proxy) in the timeline and judging by the quality of the clip it's clearly not 540p.

[ddennedy]

Proxies are only automatically generated under certain conditions. This log line

[Debug ] 640 x 1080 threshold 702

tells me the width and height of the source video is not high enough for automatic proxy generation. From the documentation:

Both the image width and image height are more than 1.3X the preview scaling resolution (or 540 if preview scaling is off).

You can still manually make a proxy for it in Properties.

[ssoher]

@ddennedy thank you, didn't know preview scaling affected proxy generation, that's a bit confusing tbh. Anyways my problem is solved 👍