From: christina zou <zou.christina@gmail.com>
To: sox-users@lists.sourceforge.net
Subject: Several beginner q's about Sox encoding (mp3/aac)?
Date: Mon, 20 Feb 2017 19:43:36 -0800 [thread overview]
Message-ID: <CAMmPYJ3Z8Tg3rTS3M-bUyey2cpGMkis4R=cpmvzP_v9NFc-Mrg@mail.gmail.com> (raw)
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Hi,
I have a Raspberry Pi running Debian Jessie, as well as a MEMS I2S mic and
a Pi Camera. My mic records 32bit raw PCM audio. I am trying to stream
video and audio to Youtube Live. I am using Sox for audio recording and
encoding.
YouTube Live only accepts mp3 or aac encoded audio.
I have installed sudo apt-get install libsox-fmt-mp3, so my Sox is able to
encode mp3.
I am using this command to record and encode audio:
rec --buffer 2000000 -c 1 -r 44100 -b 32 test.mp3
/usr/bin/rec WARN formats: mp3 can't encode to 32-bit
Input File : 'mic_mono' (alsa)
Channels : 1
Sample Rate : 44100
Precision : 32-bit
Sample Encoding: 32-bit Signed Integer PCM
-------
1. I get the warning: " mp3 can't encode to 32-bit" - what should I do
about this?
2. My resultant MP3 file has small clicks and popping noises throughout. I
know this is not a problem with my mic, as I've produced AAC encoded audio
with FFMPEG that was perfectly clean. Any idea why this is happening?
3. Is it possible to compile SOX with AAC encoding support? I want to try
AAC encoding to see if that eliminates the clicks and pops.
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next reply other threads:[~2017-02-21 3:43 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-21 3:43 christina zou [this message]
2017-02-21 5:52 ` Several beginner q's about Sox encoding (mp3/aac)? Erich Eckner
2017-02-21 6:06 ` harsh kurra
2017-02-21 8:16 ` unosonic
2017-02-22 11:00 ` Alexander Stephen Thomas Ross
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