[FFmpeg-devel] Regression: r20954-5 broke threads auto in libx264

[Jason Garrett-Glaser]

-threads 0 now no longer works to specify auto threads in libx264.  We
have received a ton of complaints from users already about ffmpeg
performance going down massively in the past few weeks.

This is a serious regression.

If nobody can come up with a reasonable fix for this in the next day
or two, I will disconnect the threads option in libx264.c, forcing it
to auto in all cases.

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