Fix env in open source

PiperOrigin-RevId: 864773064

Merge pull request #61 from hhoppe:main

PiperOrigin-RevId: 845802990

Merge pull request #54 from hhoppe:main

PiperOrigin-RevId: 753520071

Slight API change for running ffmpeg internally.

PiperOrigin-RevId: 747505970

Merge pull request #48 from hhoppe:main

PiperOrigin-RevId: 640872341

Merge pull request #43 from hhoppe:main

PiperOrigin-RevId: 638219237

Merge pull request #41 from hhoppe:main

PiperOrigin-RevId: 588342735

Improve finding rotation from metadata.

PiperOrigin-RevId: 554505165

Merge pull request #35 from hhoppe:compare_images

PiperOrigin-RevId: 544006443

Merge pull request #34 from hhoppe:main

PiperOrigin-RevId: 543486088