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Hi,
I'm stumped and need some help.
I'm running a late 2015 iMac (Retina 5K, 27-in) 4GHz Intel Core i7 with a AMD Radeon R9 M395X 4096 MB graphics card. I recently upgraded the OS to Mohave 10.14.1. The most intensive work I use it for is amateur video editing. So I'm processing a lot of .mp4 files that range anywhere from 2GB to 7GB. I also may convert some of these videos from H.264 to H.265 using the Super265 app.
Everything's been going fine until a few weeks ago. In the middle of a batch file process, all the videos turned solid green. Both the original source video and the finished file. Audio remains, but the video that was there just moments before appears gone. The first time this happened, I thought my external HDD had failed. So I replaced it last week.
It happened again tonight, but this time even videos that had already been processed a few days ago were also effected. Even videos I'd previously converted with Super265 days ago. So both H.264 and H.265 files were effected this time. I plugged the drive into my media player connected to my TV, and the same videos looked fine. No green screen. Restarted the iMac, plugged the HDD back into the computer, and most of the files looked okay again. But some of the file sizes were really way off. Like 93MB on video files I know should have read 3GB. So I deleted them, processed one of the files again, and it seemed fine. Video showed up, and the file size was accurate. Tried a second file--great. Tried a third--Oops!--green video again.
So I know the problem is not my external HDD. And it's not my software, because even files done in other apps were affected this time.
From what I've read online tonight, it seems like a hardware failure of some kind. I hear the fan running very loudly when processing a video. And I noticed when I was upgrading to Mohave that the system reported "Machine thermal status is now fair," more often and for longer periods (30min to an hour) than "Machine thermal status is now normal" (only 2-5 min.).
Does anyone know if this sounds like a CPU or GPU failure? And if so, what remedies are advisable?
Thanks in advance!
I'm stumped and need some help.
I'm running a late 2015 iMac (Retina 5K, 27-in) 4GHz Intel Core i7 with a AMD Radeon R9 M395X 4096 MB graphics card. I recently upgraded the OS to Mohave 10.14.1. The most intensive work I use it for is amateur video editing. So I'm processing a lot of .mp4 files that range anywhere from 2GB to 7GB. I also may convert some of these videos from H.264 to H.265 using the Super265 app.
Everything's been going fine until a few weeks ago. In the middle of a batch file process, all the videos turned solid green. Both the original source video and the finished file. Audio remains, but the video that was there just moments before appears gone. The first time this happened, I thought my external HDD had failed. So I replaced it last week.
It happened again tonight, but this time even videos that had already been processed a few days ago were also effected. Even videos I'd previously converted with Super265 days ago. So both H.264 and H.265 files were effected this time. I plugged the drive into my media player connected to my TV, and the same videos looked fine. No green screen. Restarted the iMac, plugged the HDD back into the computer, and most of the files looked okay again. But some of the file sizes were really way off. Like 93MB on video files I know should have read 3GB. So I deleted them, processed one of the files again, and it seemed fine. Video showed up, and the file size was accurate. Tried a second file--great. Tried a third--Oops!--green video again.
So I know the problem is not my external HDD. And it's not my software, because even files done in other apps were affected this time.
From what I've read online tonight, it seems like a hardware failure of some kind. I hear the fan running very loudly when processing a video. And I noticed when I was upgrading to Mohave that the system reported "Machine thermal status is now fair," more often and for longer periods (30min to an hour) than "Machine thermal status is now normal" (only 2-5 min.).
Does anyone know if this sounds like a CPU or GPU failure? And if so, what remedies are advisable?
Thanks in advance!
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