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Fixed in 2022.1.X

Fixed in 2019.4.X, 2020.3.X, 2021.1.X, 2021.2.X



Found in




Issue ID




Crash on WindowsVideoMedia::StepAllStreams when reimporting a .m4v file



Reproduction steps:
1. Open the attached project "1340340"
2. In the Project window, select the "Bin" asset
3. Right-click and select "Reimport"
-- observe crash

Reproducible with: 2019.4.24f1, 2019.4.28f1, 2021.2.0a4, 2021.2.0a19
Not reproducible with: 2018.4.35f1, 2019.4.23f1, 2020.1.0a1, 2020.3.11f1, 2021.1.10f1, 2021.2.0a3

- The crash can no longer be reproduced with any version after opening the project with Unity versions before the regression
- With Unity versions before the regression, this error appears instead of the crash:
VideoClip import error for Assets/bin.m4v

  1. Resolution Note (fix version 2022.1):

    Fixed in: 2022.1.0a12

  2. Resolution Note (fix version 2021.2):

    Fixed in: 2021.2.0b17

  3. Resolution Note (fix version 2021.1):

    Fixed in: 2021.1.28f1

  4. Resolution Note (fix version 2020.3):

    Fixed in: 2020.3.22f1

  5. Resolution Note (fix version 2019.4):

    Fixed in 2019.4.33f1

Comments (3)

  1. MartinHelvig

    Nov 05, 2021 09:17

    Looking forward to 2020.3.22f1 that should fix this. But I just want to mention that I feel game breaking bugs like this should be prioritized in the LTS versions of Unity. and not 2021 and 2022 only.

  2. ViliamVolosV

    Sep 14, 2021 08:56

    Reproducible with : 2020.3.17f1

  3. gotonightmare_unity

    Jul 14, 2021 15:03


    Also formats .mp4, .mov

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