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fix: audio transcription only charge for the length of audio duration
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,40 @@ | ||
| package helper | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "context" | ||
| "io" | ||
| "os" | ||
| "os/exec" | ||
| "strconv" | ||
|
|
||
| "github.com/pkg/errors" | ||
| ) | ||
|
|
||
| // SaveTmpFile saves data to a temporary file. The filename would be apppended with a random string. | ||
| func SaveTmpFile(filename string, data io.Reader) (string, error) { | ||
| f, err := os.CreateTemp(os.TempDir(), filename) | ||
| if err != nil { | ||
| return "", errors.Wrapf(err, "failed to create temporary file %s", filename) | ||
| } | ||
| defer f.Close() | ||
|
|
||
| _, err = io.Copy(f, data) | ||
| if err != nil { | ||
| return "", errors.Wrapf(err, "failed to copy data to temporary file %s", filename) | ||
| } | ||
|
|
||
| return f.Name(), nil | ||
| } | ||
|
|
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| // GetAudioDuration returns the duration of an audio file in seconds. | ||
| func GetAudioDuration(ctx context.Context, filename string) (float64, error) { | ||
| // ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 {{input}} | ||
| c := exec.CommandContext(ctx, "ffprobe", "-v", "error", "-show_entries", "format=duration", "-of", "default=noprint_wrappers=1:nokey=1", filename) | ||
| output, err := c.Output() | ||
| if err != nil { | ||
| return 0, errors.Wrap(err, "failed to get audio duration") | ||
| } | ||
|
|
||
| return strconv.ParseFloat(string(bytes.TrimSpace(output)), 64) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,37 @@ | ||
| package helper | ||
|
|
||
| import ( | ||
| "context" | ||
| "io" | ||
| "net/http" | ||
| "os" | ||
| "testing" | ||
|
|
||
| "github.com/stretchr/testify/require" | ||
| ) | ||
|
|
||
| func TestGetAudioDuration(t *testing.T) { | ||
| t.Run("should return correct duration for a valid audio file", func(t *testing.T) { | ||
| tmpFile, err := os.CreateTemp("", "test_audio*.mp3") | ||
| require.NoError(t, err) | ||
| defer os.Remove(tmpFile.Name()) | ||
|
|
||
| // download test audio file | ||
| resp, err := http.Get("https://s3.laisky.com/uploads/2025/01/audio-sample.m4a") | ||
| require.NoError(t, err) | ||
| defer resp.Body.Close() | ||
|
|
||
| _, err = io.Copy(tmpFile, resp.Body) | ||
| require.NoError(t, err) | ||
| require.NoError(t, tmpFile.Close()) | ||
|
|
||
| duration, err := GetAudioDuration(context.Background(), tmpFile.Name()) | ||
| require.NoError(t, err) | ||
| require.Equal(t, duration, 3.904) | ||
| }) | ||
|
|
||
| t.Run("should return an error for a non-existent file", func(t *testing.T) { | ||
| _, err := GetAudioDuration(context.Background(), "non_existent_file.mp3") | ||
| require.Error(t, err) | ||
| }) | ||
| } |
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