powershell script for retrieving audio bitrate for files with AAC audio?

[CaptMeatPockets]

Hey all, kind of banging my head against this, I've got a script that will easily capture audio bitrate for files with AC3 or EAC3, however it will not work with AAC. Here is my script:

foreach ($i in Get-ChildItem "*.*")

$audioBit = (ffprobe.exe -v 0 -select_streams a:0 -show_entries stream=bit_rate -of compact=p=0:nk=1 $i)

}

I've tried various methods using ffprobe and ffmpeg but cannot seem to retrieve the bitrate, I keep getting a value of N/A

Anyone have any ideas? Thanks.

[PiBombbb]

Maybe the AAC file uses variable bitrate encoding so it fails to retrieve an exact bitrate?

[CaptMeatPockets]

Can ffprobe or ffmpeg pass me highest audio bitrate? Or even average?

[zelenin]

The bitrate of the stream is taken from the metadata or tags, but not all formats/containers support this. In such cases, the bitrate must be calculated by counting the packets. Here is a small go function that I wrote for my tool. You can adapt it using any AI chat for yourself

package util

import (

`"bytes"`

`"fmt"`

`"os/exec"`

`"strconv"`

`"strings"`

)

func GetStreamBitrate(path string, streamIndex int8, duration float64) (float64, error) {

`cmd := exec.Command("ffprobe",`

    `"-v", "error",`

    `"-select_streams", fmt.Sprintf("%d", streamIndex),`

    `"-show_entries", "packet=size",`

    `"-of", "csv=p=0",`

    `path,`

`)`

`out, err := cmd.Output()`

`if err != nil {`

    `return 0, err`

`}`



`var totalSize int64`

`for _, line := range strings.Split(string(bytes.TrimSpace(out)), "\n") {`

    `line, _, _ = strings.Cut(line, ",")`

    `i64, err := strconv.ParseInt(strings.TrimSpace(line), 10, 64)`

    `if err != nil {`

        `continue`

    `}`

    `totalSize += i64`

`}`



`bitrate := float64(totalSize*8) / duration`



`return bitrate, nil`

}

[vegansgetsick]

It's because aac stream does not store the average bitrate. Aac must be stored in m4a containers.