I found this: - The gen command in "tests/fate/seek.mak", lines 204 to 211, does not pin the thread count (i.e. it does not have `-threads 1`).
- There are a lot of tests which use -threads 1 when encoding video, for example, just do this from the top level directory: rgrep '\-threads 1' They do that presumably to make sure that the output is always the same. So, it would seem that upstream actually intends for those tests to be reproducible and independent of number of available threads in the building machine, but forgot to do the same in the test which is failing here. So, my suggestion is to disable the test in the Debian package and forward the bug upstream. Thanks.
