fix(cli): generated video duration is 0

[linesoft2]

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name: Contribute to Newcar about: Have a contribution to Newcar! Thank you!

Description: [Please describe the background, purpose, changes made, and how to test this PR]

Related Issues: [List the issue numbers related to this PR]

TODO

• [ ] task1
• [ ] ...

Checklist:

• [ ] Code has been reviewed
• [ ] Code complies with the project's code standards and best practices
• [ ] Code has passed all tests
• [ ] Code does not affect the normal use of existing features
• [ ] Documentation has been updated

Screenshots: [Provide relevant screenshots or GIF animations]

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