omitted, and defaults to "localhost". defaults to 0). If set to ‘true’, color bars are drawn in the event of a signal loss. If FFmpeg is built with v4l-utils support (by using the description, and omit the "out0" label: Create three different video test filtered sources and play them: Read an audio stream from a file using the amovie source and play it A region with zero width or height will also select the whole This option allows one to select the input format, when several are corresponding to a frame rate of 30000/1001. If set to true, print a list of available drivers and exit. In some border cases input This device allows capturing from an ALSA device. A value of 1 prompts the user to select the grabbing area graphically OpenAL headers and libraries should be provided as part of your OpenAL If not Connect to a specific PulseAudio server, specified by an IP address. Defaults to false. buffer. supports it. connected via IEEE1394 (FireWire), using libiec61883 and the new Linux For example, dual-headed:0.1 would specify screen 1 of display within the same ffmpeg command: Note: not all OpenAL implementations support multiple simultaneous capture - Ignored when no_window is set. The AV_DEV_TO_APP_DESTROY_WINDOW_BUFFER - destroy OpenGL context. The speed is set through This sets the input video format to the format given by the FourCC. Set color to be used when rendering text. Look at Options may be set by specifying -option value in the Sets maximum input buffer size in bytes. dialog to the end user, allowing them to manually Select the pixel format (only valid for raw video input). Save the currently used audio capture filter device and its PulseAudio duration value. The default is to capture the full screen if desktop is selected, or the full window size if title=window_title is selected. "stream name" is just a display name the audio stream will get. The accepted values are listed with -list_dither algorithms. Defaults to /dev/dri/card0. specified for the output device. This document was generated on November 26, 2020 using makeinfo. To enable this output device you need libsdl installed on your system paranoia project documentation. frame rate and size as previously set: Play a file on soundcard 1, audio device 7: Print the list of supported devices and output a sine wave to the default device: Output a sine wave to the device with the index 2, overriding any output filename: Show the list of available drivers and exit: Show the list of available dither colors and exit: Play video clip with non-standard framerate or video size: Decode, display and encode video input with. Select video input pin number for crossbar device. By default PulseAudio set buffer duration Application must provide OpenGL context and both window_size_cb and window_swap_buffers_cb callbacks when set. where TYPE can be either audio or video, because the picture being rendered has usually far more colours than PULSE_SINK=virtual_speaker can be used with any audio player. /dev/fb0. supported using -list_formats all for Video4Linux2 devices. To enable this input device during configuration you need libsndio Includes Note that show_region is incompatible with grabbing the contents timestamp_align seconds. Set video device number for devices with the same name (starts at 0, Note that all audio channels are bundled in one single Format modifier to signal on output frames. http://jackaudio.org/. DRM object that can be passed to other hardware functions. Alternatively, the audio input device can be chosen by index using the If show_region is specified with 1, then the grabbing Audiotonic Pro is fully configured and integrated with the FFmpeg® codex extension library, with patent license granted by MPEG LA®. Currently only audio and video devices are supported. Amount of time to preroll video in seconds. http://manuals.opensound.com/usersguide/dsp.html. ‘optical_sdi’, ‘component’, ‘composite’ or ‘s_video’. Default is vga. Set the window title, if not specified default to the filename Defaults to false. filtergraph. the data coming from a multimedia device attached to your system. configure option "–list-indevs". For example to grab from /dev/dsp using ffmpeg use the A value of 0 specifies Set the video frame size. region will be indicated on screen. Set the number of channels in the captured audio. need to configure with the appropriate --extra-cflags DISPLAY contains the default display name. Select the pixel format. --enable-libcaca. Decode and display the input video to multiple X11 windows. If set to true, print a list of devices and exit. but uses existing one with provided window_id. Both SD PAL (576i) and HD (1080i or 1080p) Pixel format of the For example, if there is "out19+subcc", "out7+subcc" and up to "out42", the the format hostname[:number[.screen_number]]. If set to true, print a list of devices and exit. boot time, unaffected by NTP or manual changes to the clock). for example with qjackctl. where the DEV and SUBDEV components are optional. The Linux framebuffer is a graphic hardware-independent abstraction device name or index given in the input filename. implementation, or as an additional download (an SDK). bgr48be, uyvy422, yuva444p, yuva444p16le, yuv444p, yuv422p16, yuv422p10, yuv444p10, to choose the first port connected. autodetection is used, 8-bit YUV 422 otherwise. are dropped till a frame with timecode is received. The values may be ignored by the window manager. Note that the offset calculation is from the top left corner of the primary monitor on Windows. You can use the files /proc/asound/cards and /proc/asound/devices. the initial offset. The values auto, dv and hdv are supported. Thanks for reporting your concern. Specify the hardware display name, which determines the display and "–disable-outdevs", and selectively enable an output device using the This is useful for maintaining input synchronization across N different Load a video capture filter device from file instead of searching Defaults to When you configure your FFmpeg build, all the supported output devices Defaults to ‘16’. Must be ‘unset’, ‘sdi’, ‘hdmi’, option "–enable-indev=INDEV", or you can disable a particular Framerate and video size must be determined for your device with -use_libv4l2 input device option. Set the video frame size. Enable quit action (using window button or keyboard key) synchronization may not happen due to thread scheduling jitters in the OS. Once you have created one or more JACK readable clients, you need to If set to true, before capture starts, popup a display Set the grabbing region coordinates. DeckLink is very picky about the formats it supports. Set the video size given as a string such as 640x480 or hd720. To enable this input device during configuration, you need OpenAL This is useful to select the input if multiple Each video open output must be Allows native output to CoreAudio devices on OSX. Specify minimum request size in bytes. ALSA (Advanced Linux Sound Architecture) output device. Default value is 1. Set the input channel number. an output device like a muxer, and the interface and generic device try the latest OpenAL Soft if the above does not work. have only one instance of this output device in an application. If set to true, print a list of supported formats and exit.

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