音频导出失败，可能是因为您指定的比特率大于两倍或对于视频编解码器而言太低

Question

尝试使用 write_videofile 和 moviepy 库将 m4a (aac) 音频文件写入视频时，我偶尔会收到以下错误。我无法确定导致此错误的确切原因，因为它很少发生。我试过指定不同的音频比特率，但它仍然引发异常。

video = video.set_audio(AudioFileClip("asdf.m4a"))
video.write_videofile("video.mp4", fps=FPS, codec='libx264', audio_codec="aac", temp_audiofile='temp-audio.m4a', remove_temp=True, audio_bitrate="256k")

[Errno 32] Broken pipe MoviePy error: FFMPEG encountered the following error while writing file temp-audio.m4a:

temp-audio.m4a: Permission denied

The audio export failed, possily because the bitrate you specified was two high or too low for the video codec.: IOError Traceback (most recent call last):

video.write_videofile("video.mp4", fps=FPS, codec='libx264', audio_codec="aac", temp_audiofile='temp-audio.m4a', remove_temp=True, audio_bitrate="256k")

File "", line 2, in write_videofile File "/var/task/moviepy/decorators.py", line 54, in requires_duration return f(clip, *a, **k)

File "", line 2, in write_videofile File "/var/task/moviepy/decorators.py", line 137, in use_clip_fps_by_default return f(clip, *new_a, **new_kw) File "", line 2, in write_videofile File "/var/task/moviepy/decorators.py", line 22, in convert_masks_to_RGB return f(clip, *a, **k)

File "/var/task/moviepy/video/VideoClip.py", line 331, in write_videofile verbose=verbose) File "", line 2, in write_audiofile File "/var/task/moviepy/decorators.py", line 54, in requires_duration return f(clip, *a, **k) File "/var/task/moviepy/audio/AudioClip.py", line 204, in write_audiofile verbose=verbose, ffmpeg_params=ffmpeg_params) File "", line 2, in ffmpeg_audiowrite File "/var/task/moviepy/decorators.py", line 54, in requires_duration return f(clip, *a, **k) File "/var/task/moviepy/audio/io/ffmpeg_audiowriter.py", line 162, in ffmpeg_audiowrite writer.write_frames(chunk) File "/var/task/moviepy/audio/io/ffmpeg_audiowriter.py", line 122, in write_frames raise IOError(error)

IOError: [Errno 32] Broken pipe MoviePy error: FFMPEG encountered the following error while writing file temp-audio.m4a: temp-audio.m4a: Permission denied The audio export failed, possily because the bitrate you specified was two high or too low for the video codec.

Answer 1

问题是我在 AWS Lambda 实例上运行这个脚本。如 AWS Lambda 文档所述，我的所有文件都应该写入 /tmp。一旦我所有的临时文件都写入指定目录； FFMpeg 不再引发异常。

Answer 2

举个例子，这看起来像：

vid_path = "/tmp/outputvideofile.mp4"
audio_path = "/tmp/myaudiofile.mp3"
finalclip.write_videofile(vid_path,fps=15, temp_audiofile=audio_path, remove_temp=True)

音频导出失败，可能是因为您指定的比特率大于两倍或对于视频编解码器而言太低

The audio export failed, possily because the bitrate you specified was > two high or too low for the video codec

python

ffmpeg

moviepy