When multiple screen recordings are started at the same time, the recording results of different devices do not correspond.

- [ ] I have read the [FAQ](https://github.com/Genymobile/scrcpy/blob/master/FAQ.md).
- [ ] #4293

**Environment**
- OS: [ Windows]
- scrcpy version: [2.1.1]
- installation method: [ Windows release]
- device model:
- Android version: [12]

**Describe the bug**
use subprocess.Popen(), When multiple screen recordings are started at the same time, the recording results of different devices do not correspond.
My command is scrcpy -s {} --record {} --no-audio --no-control --no-display

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Please paste terminal output in a code block.
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Reproduce the reported Windows case by launching simultaneous `scrcpy -s {} --record {} --no-audio --no-control --no-display` processes for multiple Android 12 devices. Trace how each process is associated with its recording output, and consider the issue done when recordings consistently correspond to the devices that produced them.

Written by the indexing model from the issue text.