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ubuntu-如何在Linux上使用ffmpeg录制音频?

(ubuntu - How to record audio with ffmpeg on linux?)

发布于 2013-11-07 04:51:03

我想从麦克风录制音频。我的操作系统是ubuntu。我尝试了以下操作并出现错误

$ ffmpeg -f alsa -ac 2 -i hw:1,0 -itsoffset 00:00:00.5 -f video4linux2 -s 320x240 -r 25 /dev/video0 out.mpg

ffmpeg version 0.8.8-4:0.8.8-0ubuntu0.12.04.1, Copyright (c) 2000-2013 the Libav
developers
  built on Oct 22 2013 12:31:55 with gcc 4.6.3
*** THIS PROGRAM IS DEPRECATED ***
This program is only provided for compatibility and will be removed in a future release.
Please use avconv instead.
ALSA lib conf.c:3314:(snd_config_hooks_call) Cannot open shared library
libasound_module_conf_pulse.so
ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM hw:1,0
[alsa @ 0xbda7a0] cannot open audio device hw:1,0 (No such file or directory)
hw:1,0: Input/output error

然后我尝试

$ ffmpeg -f oss -i /dev/dsp audio.mp3

ffmpeg version 0.8.8-4:0.8.8-0ubuntu0.12.04.1, Copyright (c) 2000-2013 the Libav
developers
built on Oct 22 2013 12:31:55 with gcc 4.6.3
*** THIS PROGRAM IS DEPRECATED ***
This program is only provided for compatibility and will be removed in a future release.
Please use avconv instead.
[oss @ 0x1ba57a0] /dev/dsp: No such file or directory
/dev/dsp: Input/output error

我无法获得ffmpeg来找到我的麦克风。如何告诉ffmpeg从麦克风录音?
似乎由于该主题而可以忽略“已弃用”消息

Questioner
Conor Patrick
Viewed
0
GreenGuerilla 2014-02-28 07:29:05

我意识到这有点老了。以防万一其他人正在寻找:

ffmpeg -f alsa -ac 2 -i default -itsoffset 00:00:00.5 -f video4linux2 -s 320x240 -r 25 -i /dev/video0 out.mpg

这样,它将使用默认设备进行记录。你还缺少视频捕获设备之前的-i- / dev / device0

如果你想更具体一点,应该看一下/ proc / asound检查设备pcm文件和子目录。你应该能够收集到足够的信息以进行有根据的猜测;例如hw:1,0hw:2,0

该文档可能会提供更多线索:

网络摄像头也是如此-可能不是/ dev / video0,也许你插入了外部网络摄像头,并且在/ dev / video1上-在/ dev目录中查看有哪些可用