Questions tagged [recording]

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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....
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1answer
20 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" ...
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21 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 ...
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8 views

Recordings come out glitchy

I usually record my computer screen to give tech support or share something, however I found that my recordings have been coming out super glitchy. Windows cut diagonally revelaing the desktop even if ...
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1answer
54 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-...
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65 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 -...
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32 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, ...
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1answer
141 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 ...
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42 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 ...
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0answers
51 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 ...
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0answers
32 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? ...
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58 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 ...
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0answers
94 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 ...
2
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1answer
82 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'...
4
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1answer
567 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 ...
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0answers
240 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) ...
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1answer
1k 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 ...
4
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1answer
2k 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="$(...
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263 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 ...
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1answer
890 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 ...
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4k 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 ...
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1answer
736 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) ...
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1answer
232 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 ...
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1k 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 ...
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0answers
565 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 ...
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1answer
63 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: -...
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0answers
25 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 ...
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1answer
17k 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)+" ...
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66 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....
2
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1answer
169 views

Creating a timelapse with guvcview

Is there a way to create a timelapse video (or similar) with guvcview? I'm using an external (USB) camera and ordinary footage seems to very quickly fill a hard drive. Can I get it to record an ...
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4answers
821 views

Record keystrokes through ssh and be able to replay them

I've been working on a small script today for our minimal server here where I can log into our inventory software, download the csv and put it into the web directory using a cron job periodically. ...
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4answers
15k views

Kali Linux screen recorder

I want kali linux default screen recorder on my Ubuntu but don't know the name since I do not have the kali linux. The unique property which make me fall in love with it was the icon on the top panel ...
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761 views

Mic records sound twice as fast

I've a webcam with a built-in microphone. When I record sound with eg. arecord, it says I've recorded eg. 6 seconds of sound, but when I try to play it with eg. aplay, it says I've only recorded 3 ...
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1answer
751 views

Linux Mint - Glitch in Screen Recording video files

I am new to Linux, and most things seem to work fine; but it is not the case of Screen Recording. I have tried with the following programs: OBS Studio Voko Screen Kazam And I have tried with the ...
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1answer
1k views

Change default sampling input rate for ALSA

I am working on Jasper project on Raspberry pi for voice recognition. The problem is that there is a lot of crackling noise when I record with the default settings. After tinkering with arecord, I ...
8
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1answer
3k views

Programmatically redirect audio output of specific program to file

I would like to redirect the audio output of a program to file, on the command line, like in $ redirect-wrapper file.wav my-program so that I don't hear the output of the program, i.e. the output ...
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1answer
1k views

Understanding scriptreplay timing file

I am trying to understand the timing files produced by the script command (which are supposed to be read by scriptreplay while running typescript files). The timing file is always made of two columns, ...
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1answer
1k views

Alsa capturing mono microphone as right channel of stereo

The laptop microphone is mono but audio seems to get captured as stereo. The resulting recording has the sounds captured by the mic in the right channel and for some reason whatever sound is currently ...
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0answers
124 views

recordMyDesktop can't use jackd for audio

If I try to have recordMyDesktop (technically qt-recordMyDesktop) capture audio via jackd, when I hit record it immediately stops with the message: recordMyDesktop has exited with status: 4352 ...
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0answers
618 views

Linux sound: play back audio from input only on specific output device

I currently have a shairport (AirPlay) server which receives audio data and outputs it over optical SP/DIF (Toslink) via a USB-to-Toslink adapter. This digital signal goes through an equalizer, and ...
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2answers
1k views

Execute command inside another command

I'm trying to record my tmux session. I've got an alias record-session which executes command from ttygif ttyrec ~/ttygif/files/last-session. As far as I understand ttygif starts new terminal instance ...
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0answers
97 views

“Replay” feature (repeat / rewind)

This occurred to me playing some games where there is no live rewind feature. Basically what I'm looking for is an application which records the screen, and - when pressing a shortcut - rewinds what ...
2
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1answer
652 views

Record/Capture desktop for specific time period

I use gtk-recordmydesktop and/or recordmydesktop to record my desktop and create screen-casts. I need to record my desktop for a given period of time, let's say 1 hour, so that I can record stuff ...
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0answers
839 views

Treat USB Sound card mic input as line input

I have a Creative Labs Sounds Blaster Play (SB1140) USB Sound card. When I plug it into either a Windows or Mac computer, I am able to record line level audio through the Mic jack - clean and clear. ...
2
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0answers
198 views

Record video from camera and get frame number on demand

I'm using avconv at the moment to store the input of my camera as an video. This works fine. Now i'm asking myself if it is possible to get the current frame number at a particular time of the video ...
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1answer
20k views

Issues with arecord command: Channels count non available

I'm having some mixed results with the arecord command in the terminal. The hardware I'm using consists of the Cirrus Audio Card for the Raspberry Pi. I'm trying to record a 24-bit 192kHz sound (from ...
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1answer
201 views

Is there any app that records notes with synchronized Audio?

Is there any application that it records audio and you take notes. After recording you can play the audio that was recorded when a specific text was written. There are apps that does this for other OS ...
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0answers
3k views

How to record video from an old webcam using ffmpeg on Linux?

After couple of hours I'm finally ready to accept my absolute lack of knowledge in that topic and decided to post this question here. I've been trying to record video from an old external USB webcam (...
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3answers
103 views

Cannot remember the name of a CLI recorder software

I stumbled across a useful command line recorder that allows the user to copy the text when watching the 'recording'. I just cannot remember the name of the project. I just remember you can play and ...
2
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0answers
428 views

Capture timestamped X mouse events, and render a video with custom mouse pointer?

I am typically using recordmydesktop to record some application interaction; however, on my system, recordmydesktop always shows the same mouse pointer/cursor (the arrow) - regardless if, in reality, ...