RuntimeError: memory access out of bounds fixed after running invalid command

[allen-garvey]

Describe the bug
For certain video files, when converting from video to images, ffmpeg will fail with RuntimeError: memory access out of bounds. However if ffmpeg.exec is run before, with an invalid command, the operation will succeed.

To Reproduce

// for certain videos, fails with RuntimeError: memory access out of bounds
ffmpeg.exec(["-i", "movie.mp4", "-vf", `fps=1`, `/tmp/%02d.jpg`]);

// however the following will succeed
ffmpeg
  .exec(["-i", "not-found"])
  .then(() =>
    ffmpeg.exec(["-i", "movie.mp4", "-vf", `fps=1`, `/tmp/%02d.jpg`])
  );

Expected behavior
ffmpeg.exec should work the first time without having to execute an invalid command.

Desktop (please complete the following information):

• OS: Ubuntu 24.04
• Browser Chrome
• Version 132.0.6834.83