Function get_audio_duration

core/asr_backend/audio_preprocess.py:55–69

Get the duration of an audio file using ffmpeg.

(audio_file: str)

        rprint(f"[green]🎬➡️🎵 Converted <{video_file}> to <{_RAW_AUDIO_FILE}> with FFmpeg\n[/green]")

def get_audio_duration(audio_file: str) -> float:
    """Get the duration of an audio file using ffmpeg."""
    cmd = ['ffmpeg', '-i', audio_file]
    process = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    _, stderr = process.communicate()
    output = stderr.decode('utf-8', errors='ignore')
    
    try:
        duration_str = [line for line in output.split('\n') if 'Duration' in line][0]
        duration_parts = duration_str.split('Duration: ')[1].split(',')[0].split(':')
        duration = float(duration_parts[0])*3600 + float(duration_parts[1])*60 + float(duration_parts[2])
    except Exception as e:
        print(f"[red]❌ Error: Failed to get audio duration: {e}[/red]")
        duration = 0
    return duration

def split_audio(audio_file: str, target_len: float = 30*60, win: float = 60) -> List[Tuple[float, float]]:
    ## 在 [target_len-win, target_len+win] 区间内用 pydub 检测静默，切分音频