Questions tagged [recording]

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linux record audio (arecord or similair) and seperate left/right channel

I want to record (line in) from an audio device and seperate the left and right channel each to a different process. or record them seperately of course. what I want is something like that (play ...
Paul Neuwirth's user avatar
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0 answers
48 views

ALSA - USB Interface - How to choose only one channel

I am currently trying to record audio with ALSA and a USB interface. I am using a focusrite scarlett 4i4 3rd gen and a raspberry pi 4b with linux debian bookwarm installed. My question is how do I ...
MaDr's user avatar
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7 votes
1 answer
534 views

ffmpeg: record screen area selected by mouse

I have found a ffmpeg command to record area of my screen: ffmpeg -video_size 2000x1600 -framerate 25 -f x11grab -i :0.0+2140,280 output.mp4 But to find the correct area, I had to do multiple trial/...
Martin Vegter's user avatar
0 votes
1 answer
223 views

What is a UVC device and how does it work without drivers?

I searched for video recording equipment to use with Linux. Upon searching I find some products that state that they do not come with drivers because it is a UVC device. Assuming that other products ...
dage86252's user avatar
1 vote
1 answer
1k views

What is "New Virtual Output" in kde screen share (portal) dialog?

In kde wayland when you choose the pipewire source in obs, you get the Desktop Portal dialog that allows you to choose one of your screens or a "Full Workspace". But also there is an option &...
Ashark's user avatar
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-1 votes
1 answer
352 views

Debian 11 - How to record Google Meeting audio?

I'm having psychoterapy through Google Meet and would like to record the sessions for studying them later. But Google does not allows recording natively except if you are the inviter and pay for a ...
BsAxUbx5KoQDEpCAqSffwGy554PSah's user avatar
3 votes
0 answers
694 views

Microphone is detected, but no input from it

I am currently using Pop!_OS version 22.04 LTS. I was trying to get on a Discord call with a friend, but he couldn't hear me. I later discovered that it would detect audio out as the input. I went to ...
StormTrooper720's user avatar
1 vote
0 answers
651 views

ffmpeg; video duration is longer than the actual recording time

I'm using the following command to record the screen with ffmpeg. ffmpeg -nostdin -video_size 720x878 -framerate 24 -f x11grab -i :0.0+720,0 -vf setpts=N/FR/TB -vcodec libx264 -y -loglevel quiet ...
Hamid Lotfy's user avatar
1 vote
1 answer
974 views

Is there a way to record the audio directly from the soundcard (e.g. using ffmpeg)?

I know there it is possible to record sound from the speaker of the computer using command such as: ffmpeg -f avfoundation -i ":0" -t 10 audiocapture.aiff But as the recorded sound is far ...
ecjb's user avatar
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3 votes
2 answers
3k views

Cannot record microphone with SimpleScreenRecorder

As mentioned in the title, I'm unable to simultaneously record my headset microphone and my desktop audio when using SimpleScreenRecorder in KDE Neon 5.24. In the "Audio Input" section of ...
Francesco Cariaggi's user avatar
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1 answer
4k views

alsa: record everything on given sound card

Is there a simple, application-independent way to record audio on given sound card? Lets say I plug in USB headset, which appears as /dev/snd/foo. I then use zoom or skype or any other application to ...
Martin Vegter's user avatar
1 vote
0 answers
119 views

How to avoid audio recording fade in?

Audios recorded from the microphone start with a pop and a fade in. I tried 2 mics from two hardware inputs. I found this solution that describes my problem but Fedora 35 has no default.pa file: In ...
Clodoaldo's user avatar
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1 answer
279 views

Why isn't sox recording anything?

I have an RTL-SDR radio receiver which outputs streaming data to stdout. I can listen to the audio with this command: $ rtl_fm -M wbfm -f 96.5M | play -r 32k -t raw -e s -b 16 -c 1 -V1 - As you can ...
OZ1SEJ's user avatar
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1 answer
348 views

ffmpeg recording slows down when audio inputs are added

I'm trying to record my screen, my mic, and my game audio with ffmpeg. This command records only my screen. ffmpeg \ -video_size 2560x1440 \ -framerate 60 \ -f x11grab -i :0 \ -map 0 \ -c:a copy \ -c:...
LostXOR's user avatar
  • 215
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0 answers
97 views

Video is delayed when recording

I need to record my screen. I have tried different recording softwares, but I always have the same issue: the recording of the video is delayed with respect to the audio (so I hear the audio before ...
Deffo's user avatar
  • 119
0 votes
3 answers
1k views

Hardware accelerated lossless recording on a 6700 XT using ffmpeg

I'm trying to record my screen losslessly (or at near lossless quality) with hardware acceleration on a 6700 XT with ffmpeg. I'm running Linux Mint with the 5.14.14-051414-generic kernel. I've tried: ...
LostXOR's user avatar
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1 vote
0 answers
391 views

ffmpeg how to record a specific window (even when not visible)

I want to record a specific window even when its not visible(another window is above it) using ffmpeg is it possible? if so how?
Thenujan Sandramohan's user avatar
0 votes
1 answer
1k views

How do I record just the internal audio with ffmpeg?

ffmpeg -f x11grab -s 1920x1080 -i :0.0 -f alsa -i default -c:a aac -c:v libx264 -crf 18 -preset slower ~/Videos/recording-(date +%F-%I-%M).mp4 I'm using this command to record the screen and my ...
fahimscirex's user avatar
0 votes
1 answer
3k views

Change default recording sample rate for "arecord"

I'm attempting to change the default sample rate when recording audio with arecord. Currently, when running arecord test.wav the rate is 8000 Hz: arecord test.wav Recording WAVE 'test.wav' : Unsigned ...
Bortus's user avatar
  • 3
-1 votes
2 answers
782 views

Highest Quality Possible in SimpleScreenRecorder

I have installed SimpleScreenRecorder On My Linux Machine but I recorded and Edited Some Videos With it Like This Example But the Recorded Quality is Not Good Enough, Please Tell me Some Settings ...
ADMI's user avatar
  • 11
1 vote
1 answer
818 views

Recording from Pulseaudio sink AND source at the same time

I'm trying to record a Google Meet call I'm participating in (audio only). Creating a combined sink from a null sink and my headphones sink, redirecting browser to combined sink and recording null ...
s0me0ne's user avatar
  • 111
0 votes
1 answer
266 views

How can i use my headset for listening but using laptop built-in microphone to record my voice?

In windows it's very easy. How come in linux there is no solution? I have already tried using hda-jack-retask, but it was updated in 2014 last time and now its 2020 with Ubuntu 20.04 LTS. A lot has ...
John Dale's user avatar
1 vote
0 answers
1k views

Create virtual display output device or new X display for recording fullscreen desktop application

I'd like to create a virtual display which emulates a hardware monitor. For example, I'd like to be able to move application windows to this "monitor", record on the "monitor", etc....
TheIntern's user avatar
  • 113
1 vote
1 answer
607 views

Lossless ffmpeg recordings with low resource usage

I'm trying to record lossless videos with ffmpeg of My screen My computer audio My microphone audio using this script: MIC="alsa_input.usb-Logitech_Logitech_USB_Headset-00.mono-fallback" ...
LostXOR's user avatar
  • 215
0 votes
0 answers
72 views

Is it possible to record radio using headphones?

Disclaimer 1: I'm programmer, not a hardware expert, maybe – I just don't know – is the question completely stupid. Disclaimer 2: I'm not a english native. With my MP3-Player I can record radio (in ...
zvavybir's user avatar
  • 101
0 votes
1 answer
3k views

Setting the default pulseaudio capture source to "monitor" via command-line

I want to do this from commandline: What I've done so far is to create a ~/.asoundrc file with the following contents: pcm.pulse_monitor { type pulse device alsa_output.pci-0000_00_1b.0.analog-...
Parsa Mousavi's user avatar
0 votes
1 answer
869 views

How can one record mic audio straight to a FLAC file?

Months ago I would occasionally record little snippets of audio as FLAC files using ffmpeg and ALSA. I used a command that looked more or less like this: ffmpeg -f alsa -ar 48000 -ac 1 -acodec flac -...
wundrweapon's user avatar
2 votes
0 answers
203 views

How to show keyboard hits while recording with kazam?

Looking to make some demonstrations or tutorials, I am able to record the screen "easily" with kazam. However, even if the mouse pointer is recorded, keyboard shortcuts are not. For some software, ...
Adrian Maire's user avatar
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1 vote
1 answer
213 views

How to use an handheld device with GNU/Linux and YouTube to protect from death threats?

Suppose you fear you could meet someone who will threaten you with death. Assuming the bad guy won't destroy your handheld (for example an Ubuntu Touch device) on sight, a barely decent form of ...
Scrooge McDuck's user avatar
0 votes
0 answers
209 views

How do I record video from my MacBook Air's webcam?

I recently installed Linux Mint on my MacBook Air, and I would like to record video from it's built in camera. It seems that the drivers are not installed, since guvcview gives an error when I try to ...
LostXOR's user avatar
  • 215
2 votes
0 answers
427 views

Using PulseAudio to pipe audio from multiple applications into separate files in parallel

I would like to redirect the audio output of multiple applications to multiple files in parallel on Ubuntu. For example, if I have two instances of Chrome running in the background at the same time, I ...
Jonathan Gould's user avatar
2 votes
0 answers
78 views

Program for constantly recording audio of the past 24 hours

I want a program to continuously record the audio of my microphone for the past 24 hours (like a surveillance system) so I can have the audio of the past 24 hours. Is there a progeny for doing this? ...
poyynt's user avatar
  • 31
1 vote
0 answers
221 views

How to record the lock screen and other users sessions?

After I log in to my Linux session I start recording my screen with the command recordmydesktop --fps 2 --no-sound --on-the-fly-encoding --compress-cache --no-frame --v_quality 10 But when I to go ...
user's user avatar
  • 781
2 votes
0 answers
146 views

Recording screen on openSUSE Tumbleweed leads to black screen

I want to record my screen in openSUSE Tumbleweed, but it always fails. I've tried four recorders (listed below), but my video always results in a black video. The only thing that can be seen is the ...
Amaterastis's user avatar
2 votes
1 answer
92 views

Is there a tool that will let me listen to segments of a single audio file while it is still recording

This project encompasses accomplishing the following goals: Record the professor. Listen to past segments of recording while recording is still adding new segments. I apologise if this is obscure. I'...
Douglas Bentley's user avatar
4 votes
1 answer
2k views

How to use asciinema offline?

How can I record and play asciinema screen recordings in a LAN without internet connection? The tool uploads the recordings per default to the asciinema website but I want to keep it local and run ...
Jonas Stein's user avatar
  • 4,078
1 vote
0 answers
490 views

ALSA mono configuration not working

I installed a new PCI based soundcard in my PC. It has 8 S/PDIF based I/O pairs with each line numbered 1 to 8 for input as well as output. And I'm trying to use input lines 3, 5, 7 for input (mics) ...
skrowten_hermit's user avatar
0 votes
1 answer
5k views

Using and configuring ALSA plugins dmix and dsnoop for stereo play and capture

I installed a new PCI based soundcard in my PC. It has 8 S/PDIF based I/O pairs with each line numbered 1 to 8 for input as well as output. And I'm trying to use lines 3-8 for input (mics) and 3-8 for ...
skrowten_hermit's user avatar
5 votes
2 answers
6k views

record screen and internal audio with ffmpeg

What is the ffmpeg command to record screen and internal audio (on Ubuntu 18.04)? I'll omit the many things I tried that did not work and skip to the something close to what I am looking for; V="$(...
user1133275's user avatar
  • 5,534
0 votes
0 answers
448 views

record audio on Linux - stop generating output automatically

I am using pulseaudio, but I don't really understand it. I am recording the audio stream from a video playing in my browser. If I use module-combine-sink, I can record the monitor stream as well as ...
sfink's user avatar
  • 151
1 vote
1 answer
1k views

Easiest way to record mic and line in simultaneosly and without pain?

I'm using Arch Linux with alsa, pulseaudio, pavucontrol, jack, and whatever else. I want to record a microphone and a guitar simultaneously no matter how low level I should get. There are several ...
ape1's user avatar
  • 41
1 vote
0 answers
5k views

ffmpeg "moov atom not found" when merging MP4 & MKV

I am trying to merge an MP4 file (which contains only video), with a MKV file (which contains only audio). I am using this command: ffmpeg -i video.mp4 -i audio.mkv -c copy output.mp4 But I am ...
Madno's user avatar
  • 165
1 vote
1 answer
1k views

X Window / VNC session recording

While I am aware of rfbproxy and ffmpeg's x11grab capability, all the examples online seem to be aimed at users wanting to record their own sessions. My usage model is to maintain a (reasonably) ...
symcbean's user avatar
  • 5,462
1 vote
1 answer
449 views

What are several different and alternative methods to backup the audio levels in linux?

The audio recording levels can be saved for Ubuntu / Debian users using a command from the package alsa-mixer, alsactl --file ~/filename store However I am looking for alternative ways to save and ...
Mephisto's user avatar
  • 1,077
1 vote
0 answers
2k views

Capturing remote VNC to x264 without storing first

I'm looking for a way to capture a remote VNC display into a local h.264 recording without having to record first in another format and then convert it after the fact. I'd see that it's is possible to ...
seanr8's user avatar
  • 111
1 vote
0 answers
832 views

Uploading a webcam stream via ftp in realtime

So here's the situation. I'm trying to build a watching program for my linux box with an inbuilt webcam, that starts recording when motion is detected, and uploads the recording to my domain. Motion ...
Lahcahnoe's user avatar
0 votes
1 answer
100 views

Growisofs renaming files

I was trying to copy several files to a dvd with growisofs. The command I use it is: growisofs -Z /dev/dvd -R -J /media/34GB/tmp/ But when I send it to command line, I receive this message I: -...
user2752471's user avatar
1 vote
0 answers
33 views

streamer not recording audio

I am trying to record a video from my webcam with streamer, this is my command: streamer -t 1:0:0 -c /dev/video0 -f rgb24 -r 5 -o outfile.avi Unfortunately this is not recording any audio, which ...
Reyx_0's user avatar
  • 931
9 votes
2 answers
27k views

'Device or resource busy' error thrown when trying to record audio using arecord

I'm trying to record audio that is being played on separate channels using arecord. I do this by executing the following command in separate threads in a python script: arecord -D plug:"+str(in_id)+" ...
skrowten_hermit's user avatar
0 votes
0 answers
98 views

Why does Debian records in 1080p and Ubuntu record in 720p

Last year I was using Debian Jessie 8 as my main linux os and I used to record my screen with Record My Desktop the resolution of the video rendered as 1080p but recently I have switched to Ubuntu 16....
Katz's user avatar
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