<p>Audio samples are encapsulated into frames as well. For PCM, the framing is notional, but for DCT-based codecs, it's a basic requirement.</p>

<p>AAC typically bundles 1024 <strong>s</strong>amples <strong>p</strong>er <strong>f</strong>rame, so 1 second of 48000 samples represents 48000/1024 = 46.875 FPS</p>

CC BY-SA 4.0
2018-10-31T18:57:35.557Z
2018-10-31T18:57:35.557Z
Gyan
<p>I have a video file with audio. <code>ffprobe</code> reports two different numbers: Sampling rate and Frame rate. I understand the 48kHz rate--there are 48,000 audio samples every second. What is the other number, and what is a "frame" in this context?</p>

<pre><code> Audio
 ID                                       : 2
 Format                                   : AAC
 ...
 Sampling rate                            : 48.0 kHz
 Frame rate                               : 46.875 FPS (1024 SPF)
</code></pre>

<audio><framerate>
What is the difference between audio Sampling rate and Frame rate?
iter
# What is the difference between audio Sampling rate and Frame rate?

(Asked by: username_0 on 2018-10-31)

I have a video file with audio. ffprobe reports two different numbers: Sampling rate and Frame rate. I understand the 48kHz rate--there are 48,000 audio samples every second. What is the other number, and what is a "frame" in this context?
 Audio
 ID                                       : 2
 Format                                   : AAC
 ...
 Sampling rate                            : 48.0 kHz
 Frame rate                               : 46.875 FPS (1024 SPF)

**Tags:** audio, framerate


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## 1 answers

### Answer by username_1 on 2018-10-31. Score: 7 | Accepted answer

Audio samples are encapsulated into frames as well. For PCM, the framing is notional, but for DCT-based codecs, it's a basic requirement.

AAC typically bundles 1024 **s**amples **p**er **f**rame, so 1 second of 48000 samples represents 48000/1024 = 46.875 FPS


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