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ConvertToWAV: Use temporary file to avoid FFmpeg overwrite errors

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This commit is contained in:
Chigozirim Igweamaka 2024-08-03 10:23:18 +01:00
parent d16c6f1553
commit de40d13c6f
1 changed files with 17 additions and 6 deletions
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23
wav/convert.go
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@ -8,8 +8,9 @@ import (
"strings" "strings"
) )
func ConvertToWAV(inputFilePath string, channels int) (wavFilePath string, errr error) { // ConvertToWAV converts an input audio file to WAV format with specified channels.
_, err := os.Stat(inputFilePath) func ConvertToWAV(inputFilePath string, channels int) (wavFilePath string, err error) {
_, err = os.Stat(inputFilePath)
if err != nil { if err != nil {
return "", fmt.Errorf("input file does not exist: %v", err) return "", fmt.Errorf("input file does not exist: %v", err)
} }
@ -21,15 +22,19 @@ func ConvertToWAV(inputFilePath string, channels int) (wavFilePath string, errr
fileExt := filepath.Ext(inputFilePath) fileExt := filepath.Ext(inputFilePath)
outputFile := strings.TrimSuffix(inputFilePath, fileExt) + ".wav" outputFile := strings.TrimSuffix(inputFilePath, fileExt) + ".wav"
// Execute FFmpeg command to convert to WAV format with one channel (mono) // Output file may already exists. If it does FFmpeg will fail as
// it cannot edit existing files in-place. Use a temporary file.
tmpFile := filepath.Join(filepath.Dir(outputFile), "tmp_"+filepath.Base(outputFile))
defer os.Remove(tmpFile)
cmd := exec.Command( cmd := exec.Command(
"ffmpeg", "ffmpeg",
"-y", // Automatically overwrite if file exists "-y",
"-i", inputFilePath, "-i", inputFilePath,
"-c", "pcm_s16le", // Output PCM signed 16-bit little-endian audio "-c", "pcm_s16le",
"-ar", "44100", "-ar", "44100",
"-ac", fmt.Sprint(channels), "-ac", fmt.Sprint(channels),
outputFile, tmpFile,
) )
output, err := cmd.CombinedOutput() output, err := cmd.CombinedOutput()
@ -37,6 +42,12 @@ func ConvertToWAV(inputFilePath string, channels int) (wavFilePath string, errr
return "", fmt.Errorf("failed to convert to WAV: %v, output %v", err, string(output)) return "", fmt.Errorf("failed to convert to WAV: %v, output %v", err, string(output))
} }
// Rename the temporary file to the output file
err = os.Rename(tmpFile, outputFile)
if err != nil {
return "", fmt.Errorf("failed to rename temporary file to output file: %v", err)
}
return outputFile, nil return outputFile, nil
} }