arecord -f cd -D 默认:CARD=Intel -| avconv -i pipe:0 -acodec libmp3lame -aq 128k g3-$dt-$$.mp3
我正在尝试通过我的笔记本电脑 MIC 进行录音。在开始录制之前有一个不受欢迎的暂停。
avconv version 0.8.10-6:0.8.10-1, Copyright (c) 2000-2013 the Libav developers
built on Feb 5 2014 03:52:19 with gcc 4.7.2
Recording WAVE '-' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
<DELAY>
[wav @ 0x21b4300] max_analyze_duration reached
Input #0, wav, from 'pipe:0':
Duration: 03:22:53.94, bitrate: N/A
Stream #0.0: Audio: pcm_s16le, 44100 Hz, 2 channels, s16, 1411 kb/s
Output #0, mp3, to 'g3-Monday-April-14-2014-06_38_07PM-15308.mp3':
Metadata:
TSSE : Lavf53.21.1
Stream #0.0: Audio: libmp3lame, 44100 Hz, 2 channels, s16, 200 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (pcm_s16le -> libmp3lame)
Press ctrl-c to stop encoding
^CAborted by signal Interrupt...te= 51.7kbits/s
size= 94kB time=14.86 bitrate= 51.6kbits/s
video:0kB audio:93kB global headers:0kB muxing overhead 0.143132%
Received signal 2: terminating.
我尝试了 strace -f 我看到了这个
read(3, 0x7fff06200b80, 128) = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=3, events=POLLIN|POLLERR|POLLNVAL}], 1, -1^C <unfinished ...>
Aborted by signal Terminated...
向上滚动
stat("/usr/share/alsa/alsa.conf", {st_mode=S_IFREG|0644, st_size=9184, ...}) = 0
open("/dev/snd/controlC0", O_RDONLY|O_CLOEXEC) = 3
fcntl(3, F_SETFD, FD_CLOEXEC) = 0
ioctl(3, UI_DEV_CREATE, 0x7fff06201b90) = 0
close(3) = 0
open("/dev/snd/timer", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = 3
fcntl(3, F_SETFD, FD_CLOEXEC) = 0
ioctl(3, 0x80045400, 0x7fff06201eb8) = 0
ioctl(3, SNDCTL_TMR_START or TCSETS, 0x7fff06201ebc) = 0
ioctl(3, TIOCSPGRP, 0x7fff06201ec0) = 0
ioctl(3, 0x80045400, 0x7fff0620230c) = 0
semop(786432, {{0, -1, SEM_UNDO|IPC_NOWAIT}}, 1) = 0
open("/dev/snd/controlC0", O_RDONLY|O_CLOEXEC) = 5
fcntl(5, F_SETFD, FD_CLOEXEC) = 0
ioctl(5, UI_DEV_CREATE, 0x7fff062022f0) = 0
close(5)
= 0
我也手动执行此操作.. 将其保存到文件中,然后在文件上运行 avconv;那要快得多(立即完成)。
可能是什么问题呢。