[SOLVED] ffmpeg-git records no sound

HitomiTenshi · 03-09-2013, 06:43 AM

Hello dear LinuxQuestions community, I'm a delightful arch linux user and recently I wanted to do a recording with ffmpeg. I compiled x264 from git and then compiled ffmpeg from git with libx264 support. After I was done with compiling I tried to record something with this command:

Code:

ffmpeg -f alsa -ac 2 -i hw:0,0 -f x11grab -r 30 -s 1920x1080 -i :0.0 -acodec pcm_s16le -vcodec libx264 -preset ultrafast -threads 8 output.mkv

The outcome was somehow disappointing though. I had no audio, the video on the other hand was perfectly fine. I've been searching ever since ffmpeg refused to record my audio for a solution. I found many, but none of them worked (except one that didn't involve ffmpeg, more to that in a minute). Before we start, I want to point out that this thread is kinda a repost from the arch linux forum, I reposted it here, because nobody was answering me there. Here's the link: ffmpeg records no sound
-------------------------------------------------------------------------------------------------------
I only have alsa, no PulseAudio or OSS stuff.

I've been trying everything I managed to find through google but nothing seems to work. General sound output works, I can listen to music and do all my stuff like I'm used to, I just can't get ffmpeg to record my sound.

Here are logs from aplay and arecord:

Code:

aplay -L

Quote:

null
Discard all samples (playback) or generate zero samples (capture)

default:CARD=PCH
HDA Intel PCH, ALC898 Analog
Default Audio Device

sysdefault:CARD=PCH
HDA Intel PCH, ALC898 Analog
Default Audio Device

front:CARD=PCH,DEV=0
HDA Intel PCH, ALC898 Analog
Front speakers

surround40:CARD=PCH,DEV=0
HDA Intel PCH, ALC898 Analog
4.0 Surround output to Front and Rear speakers

surround41:CARD=PCH,DEV=0
HDA Intel PCH, ALC898 Analog
4.1 Surround output to Front, Rear and Subwoofer speakers

surround50:CARD=PCH,DEV=0
HDA Intel PCH, ALC898 Analog
5.0 Surround output to Front, Center and Rear speakers

surround51:CARD=PCH,DEV=0
HDA Intel PCH, ALC898 Analog
5.1 Surround output to Front, Center, Rear and Subwoofer speakers

surround71:CARD=PCH,DEV=0
HDA Intel PCH, ALC898 Analog
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers

iec958:CARD=PCH,DEV=0
HDA Intel PCH, ALC898 Digital
IEC958 (S/PDIF) Digital Audio Output

hdmi:CARD=NVidia,DEV=0
HDA NVidia, HDMI 0
HDMI Audio Output

hdmi:CARD=NVidia,DEV=1
HDA NVidia, HDMI 1
HDMI Audio Output

hdmi:CARD=NVidia,DEV=2
HDA NVidia, HDMI 2
HDMI Audio Output

hdmi:CARD=NVidia,DEV=3
HDA NVidia, HDMI 3
HDMI Audio Output

Code:

aplay -l

Quote:

**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC898 Analog [ALC898 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0

card 0: PCH [HDA Intel PCH], device 1: ALC898 Digital [ALC898 Digital]
Subdevices: 1/1
Subdevice #0: subdevice #0

card 1: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0

card 1: NVidia [HDA NVidia], device 7: HDMI 1 [HDMI 1]
Subdevices: 1/1
Subdevice #0: subdevice #0

card 1: NVidia [HDA NVidia], device 8: HDMI 2 [HDMI 2]
Subdevices: 1/1
Subdevice #0: subdevice #0

card 1: NVidia [HDA NVidia], device 9: HDMI 3 [HDMI 3]
Subdevices: 1/1
Subdevice #0: subdevice #0

Code:

arecord -l

Quote:

**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC898 Analog [ALC898 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0

card 0: PCH [HDA Intel PCH], device 2: ALC898 Analog [ALC898 Analog]
Subdevices: 2/2
Subdevice #0: subdevice #0
Subdevice #1: subdevice #1

I tried using -i default, -i sysdefault and -i plughw:0,0 instead of -i hw:0,0. I also tried various hw:0,1 etc. combinations, because I was fustrated and didn't know how to continue. I also tried recording only the sound, without the video, but nothing works at all.
Only the video runs perfectly fine.
-------------------------------------------------------------------------------------------------------
Recording sound directly while playing something works with the following .asoundrc script:

Quote:

pcm.!default
{

type file
slave.pcm
{
type plug
slave.pcm
{
type hw
card 0
device 0
subdevice -1
}
}
file /dev/shm/audio.raw
format raw

}

I then convert the raw file with ffmpeg from RAM. This is extremely annoying though, because the audio file isn't synced to the video. But IT WORKS. I want a solution with ffmpeg though, I have gathered more information, if somebody is interested:

Code:

amixer -c 0 contents

Quote:

numid=42,iface=CARD,name='Front Headphone Jack'
; type=BOOLEAN,access=r-------,values=1
: values=off

numid=44,iface=CARD,name='Front Mic Jack'
; type=BOOLEAN,access=r-------,values=1
: values=off

numid=45,iface=CARD,name='Line Jack'
; type=BOOLEAN,access=r-------,values=1
: values=off

numid=40,iface=CARD,name='Line Out CLFE Jack'
; type=BOOLEAN,access=r-------,values=1
: values=off

numid=38,iface=CARD,name='Line Out Front Jack'
; type=BOOLEAN,access=r-------,values=1
: values=on

numid=41,iface=CARD,name='Line Out Side Jack'
; type=BOOLEAN,access=r-------,values=1
: values=off

numid=39,iface=CARD,name='Line Out Surround Jack'
; type=BOOLEAN,access=r-------,values=1
: values=off

numid=43,iface=CARD,name='Rear Mic Jack'
; type=BOOLEAN,access=r-------,values=1
: values=off

numid=46,iface=CARD,name='SPDIF Phantom Jack'
; type=BOOLEAN,access=r-------,values=1
: values=on

numid=47,iface=CARD,name='SPDIF Phantom Jack',index=1
; type=BOOLEAN,access=r-------,values=1
: values=on

numid=37,iface=MIXER,name='Master Playback Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on

numid=36,iface=MIXER,name='Master Playback Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=87,step=0
: values=70
| dBscale-min=-65.25dB,step=0.75dB,mute=0

numid=12,iface=MIXER,name='Headphone Playback Switch'
; type=BOOLEAN,access=rw------,values=2
: values=on,on

numid=11,iface=MIXER,name='Headphone Playback Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=87,step=0
: values=87,87
| dBscale-min=-65.25dB,step=0.75dB,mute=0

numid=53,iface=MIXER,name='PCM Playback Volume'
; type=INTEGER,access=rw---RW-,values=2,min=0,max=255,step=0
: values=255,255
| dBscale-min=-51.00dB,step=0.20dB,mute=0

numid=21,iface=MIXER,name='Front Mic Boost Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=3,step=0
: values=0,0
| dBscale-min=0.00dB,step=10.00dB,mute=0

numid=16,iface=MIXER,name='Front Mic Playback Switch'
; type=BOOLEAN,access=rw------,values=2
: values=on,on

numid=15,iface=MIXER,name='Front Mic Playback Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=31,step=0
: values=23,23
| dBscale-min=-34.50dB,step=1.50dB,mute=0

numid=2,iface=MIXER,name='Front Playback Switch'
; type=BOOLEAN,access=rw------,values=2
: values=on,on

numid=1,iface=MIXER,name='Front Playback Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=87,step=0
: values=87,87
| dBscale-min=-65.25dB,step=0.75dB,mute=0

numid=4,iface=MIXER,name='Surround Playback Switch'
; type=BOOLEAN,access=rw------,values=2
: values=on,on

numid=3,iface=MIXER,name='Surround Playback Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=87,step=0
: values=87,87
| dBscale-min=-65.25dB,step=0.75dB,mute=0

numid=7,iface=MIXER,name='Center Playback Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on

numid=5,iface=MIXER,name='Center Playback Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=87,step=0
: values=87
| dBscale-min=-65.25dB,step=0.75dB,mute=0

numid=8,iface=MIXER,name='LFE Playback Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on

numid=6,iface=MIXER,name='LFE Playback Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=87,step=0
: values=87
| dBscale-min=-65.25dB,step=0.75dB,mute=0

numid=18,iface=MIXER,name='Line Playback Switch'
; type=BOOLEAN,access=rw------,values=2
: values=on,on

numid=17,iface=MIXER,name='Line Playback Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=31,step=0
: values=23,23
| dBscale-min=-34.50dB,step=1.50dB,mute=0

numid=22,iface=MIXER,name='Capture Switch'
; type=BOOLEAN,access=rw------,values=2
: values=on,on

numid=23,iface=MIXER,name='Capture Switch',index=1
; type=BOOLEAN,access=rw------,values=2
: values=off,off

numid=24,iface=MIXER,name='Capture Switch',index=2
; type=BOOLEAN,access=rw------,values=2
: values=off,off

numid=25,iface=MIXER,name='Capture Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=63,step=0
: values=63,63
| dBscale-min=-17.25dB,step=0.75dB,mute=0

numid=26,iface=MIXER,name='Capture Volume',index=1
; type=INTEGER,access=rw---R--,values=2,min=0,max=63,step=0
: values=63,63
| dBscale-min=-17.25dB,step=0.75dB,mute=0

numid=27,iface=MIXER,name='Capture Volume',index=2
; type=INTEGER,access=rw---R--,values=2,min=0,max=63,step=0
: values=63,63
| dBscale-min=-17.25dB,step=0.75dB,mute=0

numid=35,iface=MIXER,name='IEC958 Default PCM Playback Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on

numid=31,iface=MIXER,name='IEC958 Playback Con Mask'
; type=IEC958,access=r-------,values=1
: values=[AES0=0x0f AES1=0xff AES2=0x00 AES3=0x00]

numid=32,iface=MIXER,name='IEC958 Playback Pro Mask'
; type=IEC958,access=r-------,values=1
: values=[AES0=0x0f AES1=0x00 AES2=0x00 AES3=0x00]

numid=33,iface=MIXER,name='IEC958 Playback Default'
; type=IEC958,access=rw------,values=1
: values=[AES0=0x04 AES1=0x00 AES2=0x00 AES3=0x00]

numid=34,iface=MIXER,name='IEC958 Playback Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on

numid=19,iface=MIXER,name='Auto-Mute Mode'
; type=ENUMERATED,access=rw------,values=1,items=2
; Item #0 'Disabled'
; Item #1 'Enabled'
: values=0

numid=54,iface=MIXER,name='Digital Capture Volume'
; type=INTEGER,access=rw---RW-,values=2,min=0,max=120,step=0
: values=60,60
| dBscale-min=-30.00dB,step=0.50dB,mute=0

numid=28,iface=MIXER,name='Input Source'
; type=ENUMERATED,access=rw------,values=1,items=3
; Item #0 'Rear Mic'
; Item #1 'Front Mic'
; Item #2 'Line'
: values=2

numid=29,iface=MIXER,name='Input Source',index=1
; type=ENUMERATED,access=rw------,values=1,items=3
; Item #0 'Rear Mic'
; Item #1 'Front Mic'
; Item #2 'Line'
: values=2

numid=30,iface=MIXER,name='Input Source',index=2
; type=ENUMERATED,access=rw------,values=1,items=3
; Item #0 'Rear Mic'
; Item #1 'Front Mic'
; Item #2 'Line'
: values=2

numid=20,iface=MIXER,name='Rear Mic Boost Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=3,step=0
: values=0,0
| dBscale-min=0.00dB,step=10.00dB,mute=0

numid=14,iface=MIXER,name='Rear Mic Playback Switch'
; type=BOOLEAN,access=rw------,values=2
: values=on,on

numid=13,iface=MIXER,name='Rear Mic Playback Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=31,step=0
: values=23,23
| dBscale-min=-34.50dB,step=1.50dB,mute=0

numid=10,iface=MIXER,name='Side Playback Switch'
; type=BOOLEAN,access=rw------,values=2
: values=on,on

numid=9,iface=MIXER,name='Side Playback Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=87,step=0
: values=87,87
| dBscale-min=-65.25dB,step=0.75dB,mute=0

numid=49,iface=PCM,name='Capture Channel Map'
; type=INTEGER,access=r----R--,values=2,min=0,max=27,step=0
: values=0,0
| | TLV size error (257, 8, 0)!

numid=48,iface=PCM,name='Playback Channel Map'
; type=INTEGER,access=r----R--,values=8,min=0,max=27,step=0
: values=3,4,0,0,0,0,0,0
| | TLV size error (257, 8, 0)!

numid=50,iface=PCM,name='Playback Channel Map',device=1
; type=INTEGER,access=r----R--,values=2,min=0,max=27,step=0
: values=0,0
| | TLV size error (257, 8, 0)!

numid=51,iface=PCM,name='Capture Channel Map',device=2
; type=INTEGER,access=r----R--,values=2,min=0,max=27,step=0
: values=0,0
| | TLV size error (257, 8, 0)!

numid=52,iface=PCM,name='Capture Channel Map',index=1,device=2
; type=INTEGER,access=r----R--,values=2,min=0,max=27,step=0
: values=0,0
| | TLV size error (257, 8, 0)!

Is there any way to add Item 'IEC958 Default PCM' to numid=28,iface=MIXER,name='Input Source'? I tried recording from 'Line' but it doesn't work.
Am I doing something wrong? I'm still digging mad for a solution, and only the .asoundrc script works this far.

HitomiTenshi · 03-09-2013, 12:04 PM

Sorry for posting it here, I was hoping to get a faster answer by doing that.
Solved in the Arch Linux forum: [Solved] ffmpeg records no sound