aaron@terbium:~$ mwscript showJobs.php commonswiki --group
...
webVideoTranscode: 18013 queued; 281 claimed (153 active, 128 abandoned); 0 delayed
aaron@fluorine:~/mw-log$ grep -r 'transcode' runJobs.log | grep 'error=' | wc -l
62
Seem to be lots of "Source not found" errors.
Version: unspecified
Severity: normal
Perhaps the job gets run before the file fully gets settled into swift. Ive noticed lots of cases where the transcode is "queued" when first uploaded but doesnt run until somebody "resets" it.
Actually more likely answer is that Brion added about 80000 transcode jobs (by adding 2 new transcodes for each file) so maybe the job queue is simply getting much more use, and thus much more errors.
I think this was due to old system where lots of duplicate jobs got filed and most of them "failed" because they were already done, which has been since reworked. Closing out for now; reopen if still issues such as this.