Media Encoder Failing: Could not read from the source. Please check if it has moved or been deleted.

[FlyingFourFun]

The following Error is happening since updating to Media Encoder 25.6.0.049, the prev build was working with with the same version of premier beta.

The export project can be successful exported with Premier with no errors.

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- Source File: C:\Users\USER\AppData\Local\Temp\Wagon test_1.prproj
- Output File: D:\Downloads\20250711_161742000_iOS.MOV_1.mp4
- Preset Used: H265 Export
- Video: Based on source, Hardware Encoding, Nvidia Codec
- Audio: AAC, 320 kbps, 48 kHz, Stereo
- Bitrate: VBR, 1 pass, Target 50.00 Mbps
- Encoding Time: 00:00:00
09/01/2025 01:52:43 PM : Encoding Failed
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Could not read from the source. Please check if it has moved or been deleted.

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[FlyingFourFun]

This is not fixed in Sept 2 builds either, still broken.  I have a feeling its broken when you enable the new premier project file for AI object masks - but I cant go back and test this now.....

Versions:

Media Encoder 25.6.050 Sept 2

Premier Pro 25.6.0.040 Sept 2

Versions are synced and error persists.

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- Source File: C:\Users\XXX\AppData\Local\Temp\XXX 2025.prproj
- Output File: H:\Ready For Plex\School XXX First Day Year 2 XXX Sep 1 2025\School UoT First Day Year 2 XXX Sep 1 2025.mp4
- Preset Used: H265 Export TK
- Video: Based on source, Hardware Encoding, Nvidia Codec
- Audio: AAC, 320 kbps, 48 kHz, Stereo
- Bitrate: VBR, 1 pass, Target 50.00 Mbps
- Encoding Time: 00:00:00
09/02/2025 06:30:57 PM : Encoding Failed
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Could not read from the source. Please check if it has moved or been deleted.

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LOG shows the following non helpfull information:

[FlyingFourFun]

Still not fixed in todays build of Media encoder.....

[Scotty is New at this]

I feel your pain. I thought I was the only one. It makes no sense and it's slowing things up.

[LUIS EDUARDO34647316dph8]

Incredibly, no moderator here has seen this massive bug. I made a post showing this on a video and nothing

[FlyingFourFun · Accepted solution]

This appears to be fixed in version:

[LUIS EDUARDO34647316dph8]

It's fixed. But it feels now that is rendering at a lower, MUCH lower speed than before. Videos in 4k that took me 30 minutes tops, to be rendered, now take up to 3 hours to finish.

[FlyingFourFun]

@LUIS EDUARDO34647316dph8 the massive slow down in speed was a vibe I was getting also; but didnt have time to check it out... Do you have some numbers?  to me it feels like its about half the speed it was before.  But there is also a new media encoder beta out today so maybe it fixed that also.

As a side note, finaly, I have a RTX5090FE on its way to me,  so I'm about to dive into the pool of 5000 series issues next week I suspect....  hopefully I can confirm the typical performance returns to ME before I swap over to the 5090 or I will not be able to have soemthign to compare the peformance to.