Ffmpeg list alsa devices. x11grab usually captures the desktop GUI windows.
Ffmpeg list alsa devices 2 days ago · 1 Synopsis ffmpeg [global_options] { [input_file_options] -i input_url} { [output_file_options] output_url} 2 Description ffmpeg is a universal media converter. Jan 17, 2023 · ALSA (Advanced Linux Sound Architecture) is a widely-used software framework that provides an API to interact with sound card drivers on Linux. In my case the one I wanted was the system's default mixed sound output device (alsa_output. analog-stereo module-alsa-card. Sep 24, 2022 · This option is deprecated, please use the "-sources" option of ffmpeg to list the available input devices. com/ffmpeg/) on linux mint 17. m3u8) Stream With fluent-ffmpeg Convert this command to fluent-ffmpeg node js: My Code: This code generate only one bitrate . NAME ¶ ffmpeg-devices - FFmpeg devices DESCRIPTION ¶ This document describes the input and output devices provided by the libavdevice library. Referenced by av_input_audio_device_next (), and av_input_video_device_next (). To get the list of all PulseAudio available sources, you can type: pactl list short sources If you want more detail for each source, run pactl list sources You can reference sources either by number: -f pulse -i 5 or by name: -f pulse -i alsa_input. c s16le ch 2 44100 Hz RUNNING 6 alsa_output. ffmpeg -f alsa -ac 2 -i pulse -f x11grab -r 25 -s 800x600 -i :0. Referenced by ff_alsa_get_device_list (), ff_decklink_list_devices (), ff_decklink_list Jan 8, 2017 · 104 int ff_alsa_extend_reorder_buf (AlsaData * s, int size); 105 106 av_warn_unused_result 107 int ff_alsa_get_device_list (AVDeviceInfoList *device_list, snd_pcm_stream_t stream_type); 108 109 #endif /* AVDEVICE_ALSA_H */ Generally, there are a few ways to get audio playback and recording devices on Linux. analog-stereo. ffmpeg reads from an arbitrary number of inputs (which can be regular files, pipes FFmpeg includes the video4linux2 and ALSA input devices that enable capturing webcam and audio input. In this tutorial, we’ll learn I've searched over and over and can't find any explanation of what "hw:0,0" means. Alternatively, the video and/or audio input device can be chosen by index using the ‘ -video_device_index <INDEX> ’ and/or ‘ -audio_device_index <INDEX> ’ , overriding any device Jan 8, 2017 · index of default device or -1 if no default Definition at line 346 of file avdevice. ffmpeg -sources pulse will list the available pulse sources. g. Using ffmpeg arecord -L, I am able to identify my Logitech usb webcam as: hw:CARD=U0x46d0x821,DEV=0 USB Device 0x46d:0x821, USB Audio Direct hardware device without any conversions plughw:CARD= FFMPEG-DEVICES Section: (1) Updated: Index NAME ffmpeg-devices - FFmpeg devices DESCRIPTION This document describes the input and output devices provided by thelibavdevice library. I'm focusing on command-line tools in this answer. avi: Dec 27, 2024 · input_device tells ffmpeg which PulseAudio source you would like to use. Jun 4, 2014 · Last modified 11 years ago Last modified on Jun 4, 2014, 6:29:09 PM focal (1) ffmpeg-devices. It means, that application choose the full-range of configurations at first and then application sets single parameters until all parameters are elementary (definite). 3 输入设备 输入设备是 FFmpeg 中配置的元素，允许访问来自连接到系统的多媒体设备的数据。 当您配置 FFmpeg 构建时，默认情况下会启用所有支持的输入设备。 您可以使用配置选项“–list-indevs”列出所有可用的设备。 Nicolas George george at nsup. Whether you’re building a live streaming application or setting up a surveillance system, this guide will walk you through everything you need to know—from understanding the need for an RTSP server to using FFmpeg for a variety of streaming scenarios, including HLS. This is currently only available in Debian Unstable/Sid. In above example, -i hw:0,12, 0 is sound card, and 12 is device number (subdevice). Jan 8, 2017 · 10 * License as published by the Free Software Foundation; either May 24, 2014 · hi, i can't record audio system with ffmpeg and pulseaudio, i have tried these commands but the output is always mute: INPUT DEVICES ¶ Input devices are configured elements in FFmpeg which enable accessing the data coming from a multimedia device attached to your system. Jan 8, 2017 · list of autodetected devices Definition at line 474 of file avdevice. Namely, an input device is considered like a demuxer, and an output device like a muxer, and the interface and generic device options are the same provided by libavformat Jan 29, 2014 · 3. When I try to capture audio with the command: ffmpeg -f alsa -ac 2 -i hw:0 Jun 4, 2014 · press All Settings, and the Sound settings is in the Hardware section. gz Provided by: ffmpeg_2. 17-0ubuntu0. Namely, an input device is considered like a demuxer, and an output device like a muxer, and the interface and generic device options are the same provided by 3 输入设备 输入设备是 FFmpeg 中的配置元素，可以访问来自连接到系统的多媒体设备的数据。 当您配置 FFmpeg 构建时，默认情况下会启用所有支持的输入设备。 您可以使用配置选项“–list-indevs”列出所有可用的。 This device allows capturing from an ALSA device. list_devices for dshow works on Windows because Windows has a unified interface for external media devices. Jan 18, 2022 · 通过命令 ffmpeg -list_devices true -f dshow -i dummy 查看支持的设备列表，包含设备名称，设备类型等信息。 6. To find the desired device's ALSA ID, we can use the ALSA development tools to enumerate all available devices and their information. 168. GitHub Gist: instantly share code, notes, and snippets. alsa ALSA (Advanced Linux Sound Architecture——高级Linux音频架构)是Linux系统中用来采集音频的输入设备。如果需要使用这个设备, 系统需要安装libasound库。 使用ffmpeg采集alsa When using pulse audio, it's useful to be able to select exactly which audio device to record. 1 ffmpeg命令 Mar 2, 2010 · INPUT DEVICES ¶ Input devices are configured elements in FFmpeg which enable accessing the data coming from a multimedia device attached to your system. Jan 6, 2024 · This series describes the ffMPEG command line support and use of -devices input and output devices. 2 See Also ffmpeg, ffplay, ffprobe, ffmpeg-devices, libavutil, libavcodec, libavformat 3 Authors The FFmpeg developers. You can list all available ones using the configure option --list-indevs. Besides the sound device drivers, ALSA also bundles a user space driven library for application developers. 1. As a consequence, the (de)muxers in libavdevice are of the AVFMT_NOFILE type (they use their own I/O functions). To see the list of cards currently recognized by your system check the files /proc/asound/cards and /proc/asound/devices. First use ffmpeg -sources and it will list the video ffmpeg reads from an arbitrary number of inputs (which can be regular files, pipes, network streams, grabbing devices, etc. 0. Sep 14, 2013 · Find out what device to use for capturing with ffmpeg? I'm trying to broadcast my screen and I cannot capture audio. Jan 8, 2017 · ff_alsa_get_device_list () Definition at line 362 of file alsa. It can read a wide variety of inputs - including live grabbing/recording devices - filter, and transcode them into a plethora of output formats. When doing ffmpeg -f pulse -i you're specifying a source, not a sink. This is all on a Raspberry Pi 5. To get the list of all installed cards on your machine, you can type arecord -l or arecord -L (longer output). index of default device or -1 if no default Definition at line 463 of file avdevice. Namely, an input device is considered like a demuxer, and an output device like a muxer, and the bionic (1) ffmpeg-devices. complete list of ffmpeg flags / commands. Jun 4, 2021 · 1 I used snd-aloop module to create a loopback audio stream. The Advanced Linux Sound Architecture (ALSA) provides kernel driven sound card drivers. However, the mic and speakers tend to be handled together, so if you want the mic from the Mac to be reachable inside the container, you'll need to pass this through to the VM and then into the container, a very non-trivial task Sep 23, 2025 · 文章浏览阅读1. The empty string is equivalent to "default". You can use v4l2-ctl --list-devices to see which devices are available. It replaces the original Open Sound System (OSS). pci-0000_00_1b. org Wed Oct 22 11:53:22 CEST 2014 Previous message: [FFmpeg-devel] [PATCH] lavd/alsa: implement get_device_list callbacks Next message: [FFmpeg-devel] [PATCH] lavd/alsa: implement get_device_list callbacks Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] ffmpeg-devices This is the command ffmpeg-devices that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator INPUT DEVICES ¶ Input devices are configured elements in FFmpeg which enable accessing the data coming from a multimedia device attached to your system. You can list all available ones using the configure option "−−list−indevs". mp4 from the webcam without audio, assuming that the webcam is correctly recognized under /dev/video0: $ ffmpeg -f v4l2 -video_size 640x480 -i /dev/video0 -c:v libx264 -preset ultrafast webcam. mp4 Jun 3, 2014 · ffmpeg -f avfoundation -list_devices true -i "" To use the default device which is usually the first device in the listing the user can either use an empty name string or default: Oct 15, 2020 · How can I use the ffmpeg's avdevices c library to output audio to an audio device (specifically alsa). The playback period is set to the lower value available for the device, which gives a low latency suitable for real-time playback. Jan 12, 2018 · 8 * FFmpeg is free software; you can redistribute it and/or bionic (1) ffmpeg-devices. A microphone, on linux, will interface using pulseaudio, although there could be others. Anything found on the command line which cannot be interpreted as an option is considered to be an output url. 8. To see the supported values of your device(s) use list Jan 8, 2017 · list of autodetected devices Definition at line 344 of file avdevice. Referenced by audio_get_device_list (). Here are a few solutions for capturing your desktop and recording a video of your screen with ffmpeg. Alex Chamberlain / usb - Live audio stream using FFMPEG - Raspberry Pi Stack Exchange これの意味するのはなんだろうか。 参考: linux - What do ALSA devices like “hw:0,0” mean? How do I figure out which to use? - Super User linux - What do ALSA devices like “hw:0,0” mean? How do I figure out which to use? - Super User Sep 20, 2020 · Note: this assumes your input device is /dev/video0. h. BlueALSA is a Bluetooth audio ALSA backend that allows the use of Bluetooth-connected audio devices without the use of PulseAudio or PipeWire. In windows we can easily get the sources with ffmpeg -list_devices true -f dshow -i dummy But this won’t work for linux system as it does not support dshow and have to get the video and audio sources separately. Libavdevice is a complementary library to libavformat. DEVICE OPTIONS ¶ The libavdevice library provides the same interface as libavformat. Device Options The libavdevice library provides the same interface as libavformat. $ pactl list short sources 5 alsa_input. The filename passed to avformat_open Examples Print the list of AVFoundation supported devices and exit: $ ffmpeg -f avfoundation -list_devices true -i "" Record video from video device 0 and audio from audio device 0 into out. A webcam would usually interface using video4linux. We will use ffmpeg for the job. Namely, an input device is considered like a demuxer, and an output device like a muxer, and the interface and generic device options are Jan 8, 2017 · list of autodetected devices Definition at line 344 of file avdevice. With PipeWire tools If you are running PipeWire as your sound server, you can use pw-cli to get the names of all your inputs and outputs (recording and playback devices): pw-cli list-objects | grep node. monitor). To list recording cards or devices: Jan 10, 2016 · I use the static binaries of ffmpeg (http://johnvansickle. Jan 8, 2017 · 9 * version 2. gz Provided by: ffmpeg_4. Usage example ffmpeg -hide_banner -devices output Devices: D. Feb 28, 2021 · 3 You're doing pactl list sinks short when you should really be doing pactl list sources short. May 13, 2018 · Detailed Description Special devices muxing/demuxing library. The resulting mismatch silently disagreed with FFMPEG's device opening process, unable to spit out any usable debug data. INPUT DEVICES ¶ Input devices are configured elements in FFmpeg which enable accessing the data coming from a multimedia device attached to your system. format_code<FourCC> This sets the input video format to the format given by the FourCC. Namely, an input device is considered like a demuxer, and an output device like a muxer, and the Jan 8, 2017 · list of autodetected devices Definition at line 344 of file avdevice. The libavdevice library provides a generic framework for grabbing from and rendering to many common multimedia input/output devices, and supports several input and output devices, including Video4Linux2, VfW, DShow, and ALSA. Namely, an input device is considered like a demuxer, and an output device like a muxer, and the interface and generic device options are the same provided by libavformat xenial (1) ffmpeg-devices. 11-0ubuntu0. Run online ffmpeg-devices in free Ubuntu online, free Fedora online, free Windows online emulator or free MACOS online emulator by OnWorks 3 Input Devices Input devices are configured elements in FFmpeg which enable accessing the data coming from a multimedia device attached to your system. name = "Dummy-Driver" node ffmpeg-devices - Man Page FFmpeg devices Description This document describes the input and output devices provided by the libavdevice library. [FFmpeg-user] Listing devices Cecil Westerhof In a script I want to set the default device to the web-cam microphone Hardware related parameters The ALSA PCM devices use the parameter refining system for hardware parameters - #snd_pcm_hw_params_t. Apr 18, 2024 · 167 168 169 const FFOutputFormat ff_alsa_muxer 170 p name "alsa" 171 NULL_IF_CONFIG_SMALL "ALSA audio output" 172sizeof AlsaData 173 DEFAULT_CODEC_ID 174 AV_CODEC_ID_NONE 175 audio_write_header 176 audio_write_packet 177 ff_alsa_close 178 audio_write_frame 179 audio_get_device_list 180 audio_get_output_timestamp 181 AVFMT_NOFILE 182 alsa_muxer 3 Input Devices Input devices are configured elements in FFmpeg which enable accessing the data coming from a multimedia device attached to your system. This enables direct (kernel) interaction with sound devices through ALSA libraries. Although ALSA is a very convenient tool to use, some of its configuration names may be confusing. I have tried many ways to generate multi bitrate hls stream through node js but always generat Oct 22, 2017 · I’m not sure how this will affect the CPU usage. To list recording cards or devices: Mar 11, 2021 · ffmpeg -f alsa -i hw:0,12 -f u16le -acodec copy udp://192. There's one complication however. The first (0) source of pulse on my system is alsa_output. 21:8899 You can determine your device with aplay -l and/or arecord -l. The following command will record a video webcam. 7-0ubuntu0. For example to capture with ffmpeg from an ALSA device with card id 0, you may run the Sep 14, 2025 · Here are a few solutions for capturing your desktop and recording a video of your screen with ffmpeg. For example, when we need to select the audio device, its name usually contains some numbers, such as hw:0,0 or hw:2,1. jammy (1) ffmpeg-devices. The name of the device to capture has to be an ALSA card identifier. c. 0+200,100 -c:a pcm_s16le -c:v libx264 -preset ultrafast -crf 0 -threads 4 output. Input devices are configured elements in FFmpeg which enable accessing the data coming from a multimedia device attached to your system. (A Chinese version of this page is also available. 264 encoding guide. ), specified by the -i option, and writes to an arbitrary number of outputs, which are specified by a plain output url. . , `v4l2`, `alsa`, `x11grab`, `decklink`), their unique options, and how to interact with them using the main `ffmpeg` command-line tool. 3 module-alsa-card. name Example output: node. For more info about H. 1 ffmpeg命令 Devices: D. To list the output devices, execute the command: An alsa PCM device can be many different things, like a simple alias for a hardware device, or any of the many plugins supported by ALSA. ) Mar 18, 2023 · 简介 用FFmpeg5. Referenced by avdevice_free_list_devices (), ff_alsa_get_device_list (), ff_decklink NAME ffmpeg-devices - FFmpeg devices DESCRIPTION This document describes the input and output devices provided by the libavdevice library. gz Provided by: ffmpeg_3. How do I determine the number of my USB audio card? MPD requires me to enter something like this: audio_output { Usage example ffmpeg -hide_banner -devices output Devices: D. ) For the sake of brevity, these commands do not specify any additional encoder settings. 2-0ubuntu0. w64 remix 1 2 6 8 sox FAIL formats: can't open input `plughw:CARD=F8,DEV=0': snd_pcm_open error: Device or resource busy I guess access via ALSA just doesn't work when you have PipeWire and PulseAudio running on top of it. 264 encoding, see the H. When you configure your FFmpeg build, all the supported input devices are enabled by default. It appears that FFMPEG was indeed hooking into the device via the drivers, but the device wasn't ready because its power was suspended. = Demuxing supported . avfoundation is Mac only. mkv The image is wonderful, but, unfortunately, the audio is recorded with a bit lag : ( Feb 26, 2023 · Setting up ffmpeg in ubuntu to record audio and video is a bit complicated. Namely, an input device is considered like a demuxer, and an output device like a muxer, and the interface and generic device options are the same provided by libavformat Jun 14, 2012 · I wish to select a default sound card, or disable all others, in order to have the correct one selected after suspend. avi: $ ffmpeg -f avfoundation -i "0:0" out. PCM devices are normally defined in the ALSA configuration file see the ALSA Plugin Documentation for a list of the available plugins. Namely, an input device is considered like a demuxer, and an output device like a muxer, and Apr 10, 2017 · I haven't been following the linux sound device development (ALSA appears to be the current version with /dev/snd). If you call ffmpeg from an application like VLC media player, you can set the output device within the preferences, without affecting other applications: click Tools -> Preferences (or Control-p); under Audio, select ALSA audio output as the output module; Aug 12, 2020 · Each input device is controlled by some specific interface. Jul 19, 2022 · 获得可用设备列表 【方法一】ffmpeg只能输出可用设备信息，无法直接获得设备列表包括名字。 【方法二】直接利用dshow通过com口获得 获取设备列表 终端命令 #列出可用设备 ffmpeg -list_devices true -f dshow -i dummy #查看指定设备可用参数 ffmp Jul 16, 2023 · $ sox -t alsa "plughw:CARD=F8,DEV=0" -r 48000 -c 4 -b 32 -e signed-integer output. By default, these commands will use the x264 encoder, which should be reasonably fast on Jan 29, 2024 · INPUT DEVICES Input devices are configured elements in FFmpeg which enable accessing the data coming from a multimedia device attached to your system. The option "-devices" of the ff* tools will display the list of supported input devices. Nov 26, 2023 · input_device tells ffmpeg which audio capturing card or device you would like to use. avi Record video from video device 2 and audio from audio device 1 into out. Now, if I try to record from a single device, one of them works fineif I refer to it by the name hw:2. list_formats If set to true, print a list of supported formats and exit. mkv But ffmpeg doesn't recognize the "alsa" format or the "pulse" file. You can list all available ones using the configure option "--list-indevs". I don't have pulseaudio, and it simply doesn't work on my system, so installing it is out of question. All I could find is its doxygen and the only useful thing I was able to take out of it is, quo This option is deprecated, please use the "-sources" option of ffmpeg to list the available input devices. DEVICE OPTIONS The libavdevice library provides the same interface aslibavformat. TL;DR I wanted to send audio via network from my rooted LG TV to my Archlinux home server to LedFx webOS is slightly different Linux (but still Linux). @chapter Input Devices @c man begin INPUT DEVICES Input devices are configured elements in FFmpeg which enable accessing the data coming from a multimedia device attached to your system. Trying to identify available standards also ffplay is using SDL for audio, therefore you should make sure SDL is using the alsa driver (by setting the SDL_AUDIODRIVER environment variable) and the audio device you want (by setting the AUDIODEV environment variable). E = Muxing supported -- DE alsa ALSA audio output E caca caca (color ASCII art) output device DE fbdev Linux framebuffer D iec61883 libiec61883 (new DV1394) A/V input device D jack JACK Audio Connection Kit This documentation details device-specific formats (e. usb-Pinnacle_Systems_GmbH_DVC100-01 module-alsa-card. You can disable all the input devices Oct 21, 2018 · Another problem is that in order to achieve this, I'm pretty sure I'll need to refer to the hardware devices directly (since -f alsa -i pulse can, I believe, only refer to the "currently selected" pulse device). If I remove both of those, it can capture the specified region of the screen just fine, but silently. Below is the command I'm trying: -acodec pcm_s16le -vcodec libx264 \ 3 days ago · Namely, an input device is considered like a demuxer, and an output device like a muxer, and the interface and generic device options are the same provided by libavformat (see the ffmpeg-formats manual). 1的 API：avdevice_list_input_sources ()列出本机所有音视频设备，并对音频和视频设备进行筛选输出。 UI界面 使用Qt实现 思路 输入 命令行：ffmpeg -list_devices true -f dshow -i dummy 每个设备的后面都会在结尾括号里标出的设备类型，audio或者video。我们只要在输出设备信息的API里，找到代表设备 Jan 19, 2022 · From then, under any honest audio app enabling you to select the preferred audio output device, you should be able to choose the "Alsa Playback & Record" device, start playing then, on the command line, either : arecord on the "loopout" device ffmpeg on the "loopout" device if wishing resampling / other file formats. Input Devices are used to collect/capture data from multimedia devices connected to the system, such as microphone/microphone audio Jan 6, 2024 · This series describes the ffMPEG command line support and use of -devices input and output devices. list capabilites / device options for a specific device ffmpeg -f dshow -list_options true -i video="MiraBox Video Capture" Selecting the input card input_device tells ffmpeg which audio capturing card or device you would like to use. 22. c The following ffmpeg command successfully records video, but records severely distorted, broken and out-of-sync audio: How to create mp4 to multi bitrate hls (. May 16, 2023 · 输入设备介绍 通过配置ffmpeg的输入设备,我们可以访问系统中的某个多媒体设备的数据。下面详细介绍一下各个系统中的常见设备。 1. Changing VLC's "video standard" option in general didn't seem to have any effect. For example (ffmpeg will > display it in different way, but the content is the same) > > default > Playback/recording through the PulseAudio sound server > null > Discard all samples (playback) or generate zero samples (capture) > pulse > PulseAudio Sound Server > sysdefault:CARD=PCH > HDA Intel PCH, ALC887-VD Analog > Default Audio Device ffmpeg How to capture audio with mic This command will start capturing, press Ctrl+C when finished: ffmpeg -f alsa -i hw:1 -vcodec h264 -f v4l2 -i /dev/video0 -vcodec copy -y -t 10 out4. Namely, an input device is considered like a demuxer, and an output device like a muxer, and the 160 AVOutputFormat ff_alsa_muxer 161 name "alsa" 162 NULL_IF_CONFIG_SMALL "ALSA audio output" 163sizeof AlsaData 164 DEFAULT_CODEC_ID 165 AV_CODEC_ID_NONE 166 write_header audio_write_header 167 write_packet audio_write_packet 168 write_trailer ff_alsa_close 169 audio_write_frame 170 audio_get_device_list 171 audio_get_output_timestamp 172 Feb 5, 2016 · Here are my two command lines, which captures video using raspivid and pipes it into ffmpeg, with ffmpeg capturing audio using the alsa plugin (for which I had to recompile ffmpeg) and muxing the h264 video and AAC audio streams into the FLV format for YouTube and Facebook. x11grab usually captures the desktop GUI windows. format_code <FourCC> This sets the input video format to the format given by the FourCC. Now I want to somehow mux my desktop audio from pulseaudio and my microphone audio streams into this loopback stream, and while that can be done via ffmpeg, I can't find a way to write the output to the ALSA device. E = Muxing supported -- DE alsa ALSA audio output E caca caca (color ASCII art) output device DE fbdev Linux framebuffer D iec61883 libiec61883 (new DV1394) A/V input device D jack JACK Audio Connection Kit D kmsgrab KMS screen capture D lavfi Libavfilter virtual 3 Input Devices Input devices are configured elements in FFmpeg which enable accessing the data coming from a multimedia device attached to your system. You can list all available ones using the configure option "–list-indevs". usb-Burr-Brown_from_TI_USB_Audio_CODEC-00. monitor which is the monitor of your audio output (so it records exactly what is being played). Referenced by ff_alsa_get_device_list (), ff_decklink_list_devices (), ff_decklink_list Devices: D. Feb 19, 2025 · In Volume ontrol , Device Profiles there is a long list of options, and clicking on the ones that look promising makes no difference. Jan 8, 2017 · ALSA input and output: output Author Luca Abeni ( lucabe72 email it ) Benoit Fouet ( benoit fouet free fr ) This avdevice encoder can play audio to an ALSA (Advanced Linux Sound Architecture) device. To get the list of all pulseaudio available sources, you can type pactl list short sources. It's expected to land in Debian 12/Bookworm. Sep 11, 2020 · ffplay -f dshow -video_size 1920x1080 -framerate 30 -vcodec mjpeg -i video="USB Video":audio="Digital Audio Interface (USB Digital Audio)" Oct 23, 2023 · Driver limitations For the USB device I had, I couldn't figure out how to get VLC or ffmpeg to support NTSC (480i@60hz), so I always configured the output device to use PAL (576i@50Hz) instead, which works as default. Namely, an input device is considered like a demuxer, and an output device like a muxer, and the Feb 24, 2024 · It consistently records the audio stream without any hesitation. Access modes ALSA knows about five access modes. Referenced by ff_alsa_get_device_list (), ff_decklink_list_devices (), ff_decklink_list focal (1) ffmpeg-devices. To see the supported values of your device (s) use list Referenced by ff_alsa_get_device_list (), ff_fbdev_get_device_list (), and ff_pulse_audio_get_devices (). Referenced by ff_alsa_get_device_list (), ff_decklink_list_devices (), ff_decklink_list NAME ffmpeg-devices - FFmpeg devices DESCRIPTION This document describes the input and output devices provided by the libavdevice library. analog-stereo or just use: -f pulse -i default to use the ffmpeg-devices(1) ffmpeg-devices(1) NAME ffmpeg-devices - FFmpeg devices DESCRIPTION This document describes the input and output devices provided by the libavdevice library. A description of the currently available input devices follows. c 14 alsa_card. Input Devices Input devices are configured elements in FFmpeg which allow to access the data coming from a multimedia device attached to your system. A screenshot of ffmpeg running is attached (couldn't copy the text) Selecting the USB device plays sound through the headphones. DEVICE OPTIONS The libavdevice library provides the same interface as libavformat. FFmpeg Devices Documentation:The first entry selects the video input while the latter selects the audio input. The three arguments (in order: CARD, DEV, SUBDEV) specify card number or identifier, device number and subdevice number (-1 means any). Jan 8, 2017 · Definition at line 70 of file alldevices. Anyone care to offer a way of making this work? Jan 8, 2017 · ALSA input and output: definitions and structures Author Luca Abeni ( lucabe72 email it ) Benoit Fouet ( benoit fouet free fr ) Definition in file alsa. 4. m3u8 stream. c s16le ch 2 44100 Hz A closer look at the enumerated output of the device list reveals that, the one corresponding to 'name': u'M-Track Eight: USB Audio (hw:1,0)' does show that the number of input and output channels are 8, but listed as a single device. 1 of the License, or (at your option) any later version. E = Muxing supported -- DE alsa ALSA audio output E caca caca (color ASCII art) output device DE fbdev Linux framebuffer D iec61883 libiec61883 (new DV1394) A/V input device D jack JACK Audio Connection Kit D kmsgrab KMS screen capture D lavfi Libavfilter virtual In this post, I will show you how to list all connected media devices in Windows. Regards, Marton The PulseAudio listing for the device is as follows: $ pactl list cards short 0 alsa_card. Referenced by ff_alsa_get_device_list (), ff_decklink_list_devices (), ff_decklink_list Jan 8, 2017 · list of autodetected devices Definition at line 466 of file avdevice. Selecting the input card input_device tells ffmpeg which audio capturing card or device you would like to use. 1w次，点赞6次，收藏23次。本文全面介绍了FFmpeg命令行中输入输出设备的使用和支持，包括麦克风、摄像头、屏幕捕获等输入设备，以及音频播放、窗口渲染等输出设备。涵盖各种平台如Windows、Mac和Linux的设备使用细节。 Jan 8, 2017 · Definition at line 72 of file alldevices. Referenced by ff_alsa_get_device_list (), ff_fbdev_get_device_list (), and ff_pulse_audio_get_devices (). for grabbing devices, audio capture and playback etc. 2. The stream has to be specified by the device name or the device index as shown by the device list. The empty string is equivalent Feb 5, 2016 · Here are my two command lines, which captures video using raspivid and pipes it into ffmpeg, with ffmpeg capturing audio using the alsa plugin (for which I had to recompile ffmpeg) and muxing the h264 video and AAC audio streams into the FLV format for YouTube and Facebook. 1_amd64 NAME ffmpeg-devices - FFmpeg devices DESCRIPTION This document describes the input and output devices provided by the libavdevice library. 04. So I uploaded FFMpeg 3 Input Devices # TOC Input devices are configured elements in FFmpeg which enable accessing the data coming from a multimedia device attached to your system. Defaults to false. pci-0000_00_1f. It provides various "special" platform-specific muxers and demuxers, e. You can list all available ones using the configure option "-list-indevs". Input Devices are used to collect/capture data from multimedia devices connected to the system, such as microphone/microphone audio Oct 26, 2025 · where the DEV and SUBDEV components are optional. They can then use those ALSA drivers for high level API development. monitor module-alsa-card. E = Muxing supported -- DE alsa ALSA audio output E caca caca (color ASCII art) output device DE fbdev Linux framebuffer D iec61883 libiec61883 (new DV1394) A/V input device D jack JACK Audio Connection Kit D kmsgrab KMS screen capture D lavfi Libavfilter virtual input device D libcdio D libdc1394 dc1394 v. It is not clear from the ffmpeg documentation for v4l2 how to provide additional flags (such as h264_profile and repeat_sequence_header) to v4l2. Namely, an input device is considered like a demuxer, andan output device like a muxer, and the interface and generic deviceoptions Jan 8, 2017 · device name, format depends on device Definition at line 334 of file avdevice. The filename parameter is the name of an ALSA PCM device capable of capture, for example "default" or "plughw:1"; see the ALSA documentation for naming conventions. 2 A I have downloaded the static build of ffmpeg for Windows and am trying to get all my sound devices (input/output) I have googled and found this command to retrieve audio devices , but when I use it Nov 27, 2020 · Selecting the input input_device tells ffmpeg which pulseaudio source you would like to use. Namely, an input device is considered like a demuxer, and an output device like a muxer, and the Feb 15, 2025 · Streaming video and audio has never been more accessible, thanks to powerful tools like FFmpeg and robust protocols such as RTSP. eclnnohhbvfxxtobikwrtwvvcaitcvirwevjxvrioxtrxysguhfxftdjjiuqjx