I had separately produced two halves of my daughter's lacrosse game in 4k since they took 5-6 hours each with the intensive edits I'd made, and I went to join them using SVRT before uploading the finshed video to YouTube.
Even though I had verified that the profile I was using was supported by SVRT and I had a solid green on the SVRT track with those two clips on the timeline, the SVRT button was grayed out on the Produce page. Each clip was OK when it was by itself on the timeline, but even adding a second copy of the same clip ended up with a disabled SVRT button.
After some experimenting, I found that the problem only appears when the total timeline content exceeds a specific duration: for my two 4k 60p H.264 75Mbps MP4 clips produced by PD17, that max timeline duration is 43:00:25


I did some more testing, and it appears that the max duration is strongly correlated to the clip's bitrate - as in the higher the bitrate, the earlier on the timeline SVRT disappears when trying to produce (dashes at the end indicate approximate location, not verified to the frame level):
4k 60p H.264 MP4 | 75Mbps | 0:43:00:25 |
4k 30p H.265 MP4 | 62Mbps | 0:52:03:-- |
HD 60p H.264 MP4 | 40Mbps | 1:18:05:24 |
HD 60p H.264 M2TS | 28Mbps | 2:11:53:-- |
I have created this packed project with a 30 sec sample of one of the 4k produced clips from my lacrosse video (it's 277MB in size), and if anyone wants to test this out, here are the simple steps:
- Download and open the test project
- Turn on SVRT track (Alt+S) and verify a full green bar
- Go to the Produce screen, and run Profile Analyzer
- Accept Intelligent SVRT profile (any if mmore than one appears)
- SVRT button should be grayed out (not selectable)
- Click on Edit, and delete the tiny 2-frame section at the end of the timeline
- Return to the Produce screen and verify that SVRT is now available
I would very much appreciate hearing back from anyone after testing this out, along with any other info on various clips and bitrates on other clips you may have tested.
BTW I was able to join my two 13GB clips (47 min duration) in barely 1 minute using SVRT PD14.
This message was edited 2 times. Last update was at Mar 19. 2019 17:56
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