#2504: Audio glitches and distortion when recording alsa
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Reporter: MrNice | Owner:
Type: defect | Status: new
Priority: important | Component: avdevice
Version: git-master | Resolution:
Keywords: regression | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Comment (by MrNice):
I installed Ubuntu13.04 in a spare HD and I have run the basic command:
First versions:
!Kernel Information
!!------------------
Kernel release: 3.8.0-19-generic
Operating System: GNU/Linux
Architecture: x86_64
Processor: x86_64
SMP Enabled: Yes
!!ALSA Version
!!------------
Driver version: k3.8.0-19-generic
Library version: 1.0.25
Utilities version: 1.0.25
Second test:
$ ffmpeg -f alsa -ac 2 -i hw:0,0 -y out.wav
ffmpeg version 0.8.6-6:0.8.6-1ubuntu2, Copyright (c) 2000-2013 the Libav
developers
built on Mar 30 2013 22:20:06 with gcc 4.7.2
*** THIS PROGRAM IS DEPRECATED ***
This program is only provided for compatibility and will be removed in a
future release. Please use avconv instead.
[alsa @ 0x114ab20] Estimating duration from bitrate, this may be
inaccurate
Input #0, alsa, from 'hw:0,0':
Duration: N/A, start: 2575.326973, bitrate: N/A
Stream #0.0: Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536 kb/s
Output #0, wav, to 'out.wav':
Metadata:
encoder : Lavf53.21.1
Stream #0.0: Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536 kb/s
Stream mapping:
Stream #0.0 -> #0.0
Press ctrl-c to stop encoding
^Csize= 3251kB time=17.34 bitrate=1536.0kbits/s
video:0kB audio:3251kB global headers:0kB muxing overhead 0.001382%
Received signal 2: terminating.
I played with aplay and there is the distortion. Still bad.
Does this confirm your thought?
Alsa is now 1.0.25 instead of 1.0.22
What I have to do now to help to fix the bug?
Yes I need the bug to be fixed as I need to run ffmpeg to capture video
and audio.
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2504#comment:75>
FFmpeg <http://ffmpeg.org>
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