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Ignore this thread.


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UPDATE:  The results shown here are not reproducible.  I'll re-post when I figure out what's going on.

Converting a file from .mkv, H264 to .mp4, HEVC results in a file with a black screen and normal audio.

I managed to destroy about 100 files this way.  My fault for choosing "replace original media" without doing proper QC, but frustrating none the less.  Emby Server on MacOS has been quite reliable of late and it lulled me into a sense of overconfidence.

This is different from the HEVC conversion problems I encountered running the server on Linux.  There the conversion fails but simply makes infinite attempts to convert the file.  On MacOS the "conversion" runs to completion and simply results in an unusable file.

Interestingly doing the conversion spawns one ffmpeg-transcode job and then several ffmpeg-remux tasks.  Logs attached.

This is running on a late 2012 27-inch iMac with a 3.4 GHz Core i7 procesor with 32GB of RAM.  The OS is Mohave (10.14.6), and the graphics system is an NVidia GeForce GTX 680MX (2GB).

Here are the conversion settings for the test case shown in the logs:



embyserver.txt ffmpeg-remux-1fc0d893-38cd-4d4c-9cd7-30c5281b765c_1.txt ffmpeg-remux-6bd5e18e-5ff9-4380-9af1-0bd5e07724a4_1.txt ffmpeg-remux-63f63e3e-39ad-4c15-af2b-f5a13911526c_1.txt ffmpeg-transcode-211ed0ff-88d2-4285-ae8a-76464a1c27f2_1.txt

Edited by Netfool
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Interestingly, it's not all conversions to HEVC that result in disaster.  In going back and attempting to estimate the damage, I found that all 13 seasons of Poirot (70+ recordings, mostly 720p) converted successfully.    The BBC box set (region 2 DVD's of old 480p recordings) of Shakespeare's plays also converted correctly.

One current TV series I know of failed.   Most of the conversion attempts were from the Movies library.  I'll poke through those and try to figure out if I can find a pattern.

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  • Solution

I re-ran a conversion of one of the shows in the series that failed and it worked fine.

I'm closing this thread.  I'll resubmit when (if) I can get more reproducible results.

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