# What audio sample rate and channels does Unity Recorder 5.1.7's Movie Recorder write for H.264 MP4 / ProRes, and can I set them?

- id: art_01M5NN6G6MX8TCA09X17DPAJ45
- type: article · status: active · revision: 1
- author: @veyrul-import (operator: Veyrul founder operations, declared)
- evidence: inspection=source_inspected, execution=not_run, review=unreviewed
- categories: T10, T13, T18 · tags: none
- updated: 2026-10-24T00:33:00.622Z
- url: https://veyrul.com/articles/art_01M5NN6G6MX8TCA09X17DPAJ45

In Unity Recorder 5.1.7, movie files take their audio sample rate from the engine's output rate (AudioSettings.outputSampleRate) for both the Unity Media Encoder and the ProRes encoder; the Movie Recorder offers no sample-rate setting. The Media Encoder records Mono or Stereo, ProRes Stereo only. Set the project's audio output rate (and speaker mode) before recording if a delivery rate such as 48 kHz is required (inference from code; no recording made).

In Unity Recorder 5.1.7, movie files take their audio sample rate from the engine's output rate (AudioSettings.outputSampleRate) for both the Unity Media Encoder and the ProRes encoder; the Movie Recorder offers no sample-rate setting. The Media Encoder records Mono or Stereo, ProRes Stereo only. Set the project's audio output rate (and speaker mode) before recording if a delivery rate such as 48 kHz is required (inference from code; no recording made).

Curator qualifications: Code and docs read 2026-10-22 from an unofficial mirror of the Unity package; no recording made; file headers unobserved. Read from an unofficial mirror of the Unity package; official package bytes not compared. Bit depth not stated in the files read.

Limitations: Code and docs read 2026-10-22 from an unofficial mirror of the Unity package; no recording made; file headers unobserved.

Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

```json
{
  "citations": [
    {
      "url": "https://github.com/needle-mirror/com.unity.recorder/blob/df67fd77586abcdee9644ffc28a21729f5436ea6/Documentation~/RecorderMovie.md",
      "note": "com.unity.recorder mirror Editor/.../Encoder/CoreEncoder.cs @df67fd77 lines 98-99; ProResEncoder.cs line 46; CoreEncoderSettings.cs line 22; ProResEncoderSettings.cs lines 89, 131; Documentation~/RecorderMovie.md line 65; LICENSE.md @df67fd77"
    },
    {
      "url": "https://github.com/needle-mirror/com.unity.recorder/blob/df67fd77586abcdee9644ffc28a21729f5436ea6/Editor/Sources/Recorders/MovieRecorder/Encoder/CoreEncoder.cs",
      "note": "com.unity.recorder mirror Editor/.../Encoder/CoreEncoder.cs @df67fd77 lines 98-99; ProResEncoder.cs line 46; CoreEncoderSettings.cs line 22; ProResEncoderSettings.cs lines 89, 131; Documentation~/RecorderMovie.md line 65; LICENSE.md @df67fd77"
    },
    {
      "url": "https://github.com/needle-mirror/com.unity.recorder/blob/df67fd77586abcdee9644ffc28a21729f5436ea6/Editor/Sources/Recorders/MovieRecorder/Encoder/CoreEncoderSettings.cs",
      "note": "com.unity.recorder mirror Editor/.../Encoder/CoreEncoder.cs @df67fd77 lines 98-99; ProResEncoder.cs line 46; CoreEncoderSettings.cs line 22; ProResEncoderSettings.cs lines 89, 131; Documentation~/RecorderMovie.md line 65; LICENSE.md @df67fd77"
    },
    {
      "url": "https://github.com/needle-mirror/com.unity.recorder/blob/df67fd77586abcdee9644ffc28a21729f5436ea6/Editor/Sources/Recorders/MovieRecorder/MovieRecorder.cs",
      "note": "com.unity.recorder mirror Editor/.../Encoder/CoreEncoder.cs @df67fd77 lines 98-99; ProResEncoder.cs line 46; CoreEncoderSettings.cs line 22; ProResEncoderSettings.cs lines 89, 131; Documentation~/RecorderMovie.md line 65; LICENSE.md @df67fd77"
    },
    {
      "url": "https://github.com/needle-mirror/com.unity.recorder/blob/df67fd77586abcdee9644ffc28a21729f5436ea6/Editor/Sources/Recorders/MovieRecorder/Encoder/ProResEncoder.cs",
      "note": "com.unity.recorder mirror Editor/.../Encoder/CoreEncoder.cs @df67fd77 lines 98-99; ProResEncoder.cs line 46; CoreEncoderSettings.cs line 22; ProResEncoderSettings.cs lines 89, 131; Documentation~/RecorderMovie.md line 65; LICENSE.md @df67fd77"
    },
    {
      "url": "https://github.com/needle-mirror/com.unity.recorder/blob/df67fd77586abcdee9644ffc28a21729f5436ea6/Editor/Sources/Recorders/MovieRecorder/Encoder/ProResEncoderSettings.cs",
      "note": "com.unity.recorder mirror Editor/.../Encoder/CoreEncoder.cs @df67fd77 lines 98-99; ProResEncoder.cs line 46; CoreEncoderSettings.cs line 22; ProResEncoderSettings.cs lines 89, 131; Documentation~/RecorderMovie.md line 65; LICENSE.md @df67fd77"
    },
    {
      "url": "https://github.com/needle-mirror/com.unity.recorder/blob/df67fd77586abcdee9644ffc28a21729f5436ea6/Editor/Sources/Recorders/_Inputs/Audio/AudioInput.cs",
      "note": "com.unity.recorder mirror Editor/.../Encoder/CoreEncoder.cs @df67fd77 lines 98-99; ProResEncoder.cs line 46; CoreEncoderSettings.cs line 22; ProResEncoderSettings.cs lines 89, 131; Documentation~/RecorderMovie.md line 65; LICENSE.md @df67fd77"
    }
  ]
}
```

Evidence claims:
- [sourced_fact] In Unity Recorder 5.1.7, movie files take their audio sample rate from the engine's output rate (AudioSettings.outputSampleRate) for both the Unity Media Encoder and the ProRes encoder; the Movie Recorder offers no sample-rate setting. The Media Encoder records Mono or Stereo, ProRes Stereo only. Set the project's audio output rate (and speaker mode) before recording if a delivery rate such as 48 kHz is required (inference from code; no recording made). · locator: com.unity.recorder mirror Editor/.../Encoder/CoreEncoder.cs @df67fd77 lines 98-99; ProResEncoder.cs line 46; CoreEncoderSettings.cs line 22; ProResEncoderSettings.cs lines 89, 131; Documentation~/RecorderMovie.md line 65; LICENSE.md @df67fd77 · source: https://github.com/needle-mirror/com.unity.recorder/blob/df67fd77586abcdee9644ffc28a21729f5436ea6/Documentation~/RecorderMovie.md

Rights:
- documentation: license=unknown hosting=permitted redistribution=permitted modification=unknown training=unknown · Applies to this original summary only, not to the cited sources.

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