Score:0

Ubuntu

How can I use ffmpeg to record my screen with its input and output audios?

raylight

5/22/23, 10:01 PM

I was trying to use ffmpeg to record my screen with its audios. I'm basing myself on the commands used on this answer. I know that I can record my screen without the audio by using the command:

ffmpeg -video_size 1920x1080 -framerate 30 -f x11grab -i :0.0 -map '0' 0.mp4

I also know I can record the audio of my computer with the command:

ffmpeg -f pulse -i "alsa_input.pci-0000_00_1f.3.analog-stereo" -map '0' 0.mp3

However, if I try to put these commands together with:

ffmpeg -video_size 1920x1080 -framerate 30 -f x11grab -i :0.0 -f pulse -i "alsa_input.pci-0000_00_1f.3.analog-stereo" -map '0' 0.mp4

It generates a video with no sound in it. What am I missing? How can I put these two commands together in order to generate a video with audio using ffmpeg?

0 + 0

ffmpeg

mchid

5/22/23, 10:11 PM

Have you tried using alsa instead of pulse: `-f alsa -i hw:0` for example?

mchid

5/22/23, 10:13 PM

[This answer](https://askubuntu.com/questions/892482/how-to-record-desktop-with-audio-on-ffmpeg) shows an example using alsa instead of pulse.

raylight

5/22/23, 10:32 PM

@mchid Even though when I use the command from that answer it generates a video with audio, the video doesn't show what's on my screen. It shows something like a gray blurry image and the audio is very bad. I'm not sure if I should tweak some of the parameters there in order to make it show my screen correctly.

mchid

5/22/23, 11:25 PM

On [this answer](https://askubuntu.com/a/450786/167115), you may try this with your original command. What they do is install pavucontrol: `sudo apt update` and `sudo apt install pavucontrol` and then open the pavucontrol application (it may show up as pulse audio volume control in your installed apps). Next, start ffmpeg recording and go to the "recording" tab of pavucontrol. Here, ffmpeg should show and you can change the input to "monitor".

mchid

5/22/23, 11:26 PM

Sorry, I didn't include a link. I edited the previous comment to include the link.

mchid

5/22/23, 11:27 PM

You may also want to check out that original question as they use options like `-acodec libmp3lame` and others which may be necessary for an mp4 file?

raylight

5/23/23, 12:51 AM

@mchid I'm tweaking the parameters and trying to make it work here... The closest that I got from making it work is with `ffmpeg -video_size 1920x1080 -framerate 30 -f x11grab -i :0.0 -f alsa -i hw:0 0.mp4`... It records the video well but the audio is very bad, I can't distinguish what's being said, I just know that there's an audio. I've tried putting `-acodec libmp3lame` before the file name and it executes too... But the result is still the same...

mchid

5/23/23, 1:11 AM

Like I said, try with the pulse option but open `pavucontrol` before you run the command. Then, run the command and go to the "Recording" tab on pavucontrol and make sure it is set to the one you want with "monitor" so that it will record the actual output of that device. Another option would be to install the `alsa-utils` package: `sudo apt install alsa-utils` and then run the command `alsamixer` and then adjust the volume. Make sure none of the volumes show in red. Also, make sure automute is disabled.

raylight

5/23/23, 1:38 AM

@mchid Ah, it's solved now. In my case, `pavucontrol` was showing everything alright on its controls. The problem was my `ffmpeg` command. The command from the question on your second link does exactly what I need `ffmpeg -f x11grab -y -r 60 -s 1920x1080 -i :0.0 -vcodec mpeg4 -f alsa -i pulse -ar 44100 -acodec libmp3lame -ab 192k -ac 2 output.mp4 -qscale 0`. Although the OP there said it wasn't working for him, for me it works fine :)

rob grune

5/23/23, 2:00 AM

Myself, loathe to alter any PA configuration, as this creates many problems for my setup. Suggestion... For a GUI approach, simple, try "simplescreenrecorder" from the repos. This records the screen only. To add audio, use a microphone to record from speakers. If you have good hardware, you will have good results. I use this simple, quick method to record live stream off the net (but not to violate copyrights).

mchid

5/23/23, 2:33 AM

Remember though, usually, it's not important that pavucontrol shows the correct device on the record tab, it must show the correct device listed as "monitor of" the correct device. But if it's working it's working. I got it working using the following as well `ffmpeg -f pulse -ac 2 -i default -f x11grab -r 30 -s 1920x1080 -i :0 -c:v libx264 filename.mp4`

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: How can I use ffmpeg to record my screen with its input and output audios?

TH: ฉันจะใช้ ffmpeg เพื่อบันทึกหน้าจอของฉันด้วยเสียงอินพุตและเอาต์พุตได้อย่างไร

RO: Cum pot folosi ffmpeg pentru a-mi înregistra ecranul cu sunetul de intrare și ieșire?

RU: Как я могу использовать ffmpeg для записи моего экрана с входными и выходными звуками?

VI: Làm cách nào tôi có thể sử dụng ffmpeg để ghi lại màn hình của mình với âm thanh đầu vào và đầu ra?

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