zeranoe win exe mp4 video freezes, audio ok

[lekdrup]

We are trying to reduce mp4 file size with ffmpeg on Win7 64bit with critical updates done, Intel i3-2367M, using Zeranoe 32-bit precompiled exe.

In a one minute video the image very often (90% of cases) freezes at some point during 20 first seconds and usually restarts later. Audio continues normally. In the example below the freezing happens in the very beginning.

We could not reproduce the bug on another Windows PC, and on a Mac the same command line works fine.

ffmpeg.exe -i in.mp4 -c:v libx264 -preset veryfast -crf 37 -report -c:a copy out.mp4 -v 9 -loglevel 99

[lekdrup]

log file created with -report