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103 lines
4.4 KiB
Markdown
103 lines
4.4 KiB
Markdown
% ncplayer(1)
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% nick black <nickblack@linux.com>
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% v2.3.4
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# NAME
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ncplayer - Render images and video to a terminal
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# SYNOPSIS
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**ncplayer** [**-h**] [**-V**] [**-q**] [**-d** ***delaymult***] [**-l** ***loglevel***] [**-b** ***blitter***] [**-s** ***scalemode***] [**-k**] [**-L**] [**-t** ***seconds***] [**-n**] [**-a**] files
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# DESCRIPTION
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**ncplayer** uses a multimedia-enabled Notcurses to render images and videos to a
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terminal. By default, **stretch**-type scaling is used to fill the rendering
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area, and the **sex**-type blitter is used (where known to work well) for a
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3x2→1 mapping from pixels to cells. In a terminal that doesn't support Unicode
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13 sextants, the **quadblitter** is used instead.
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# OPTIONS
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**-d** ***delaymult***: Apply a non-negative rational multiplier to the delayscale.
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Only applies to multiframe media such as video and animated images. Not supported with **-k**.
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**-t** ***seconds***: Delay **seconds** after each file. If this option is used,
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the "press any key to continue" prompt will not be displayed. **seconds** may
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be any non-negative number.
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**-l** ***loglevel***: Log between everything (loglevel 8) and nothing (loglevel 0) to stderr.
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**-s** ***scalemode***: Scaling mode, one of **none**, **hires**, **scale**, **scalehi**, or **stretch**.
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**-b** ***blitter***: Blitter, one of **ascii**, **half**, **quad**, **sex**, **braille**, or **pixel**.
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**-m margins**: Define rendering margins (see below).
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**-L**: Loop frames until a key is pressed. Not supported with **-k**.
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**-k**: Use direct mode (see **notcurses_direct(3)**). This will have the effect of leaving the output on-screen after program exit, and generating it inline (rather than clearing the screen and placing it at the top). Not supported with **-L** or **-d**.
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**-q**: Print neither frame/timing information along the top of the screen, nor the output summary on exit.
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**-a**: Treat color 0x000000 as if it were transparent.
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**-n**: Use non-interpolative scaling. The result is usually less pleasing to the eye, but it doesn't introduce new colors.
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**-V**: Print the program name and version, and exit with success.
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**-h**: Print help information, and exit with success.
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files: Select which files to render, and what order to render them in.
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Default margins are all 0 and default scaling is **stretch**. The full
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rendering area will thus be used. Using **-m**, margins can be supplied.
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Provide a single number to set all four margins to the same value, or four
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comma-delimited values for the top, right, bottom, and left margins
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respectively. Top, right, and bottom margins are ignored when **-k** is used.
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Negative margins are illegal.
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Scaling mode **stretch** resizes the object to match the target rendering
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area exactly. Unless a blitter is specified with **-b**, **stretch** will use
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the highest-resolution non-pixel blitter available. **scale** resizes the
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object so that the longer edge of the rendering area is matched exactly, and
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the other edge is changed to maintain aspect ratio. **none** uses the original
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image size. Both **scale** and **none** aim for a 1:1 aspect ratio, and default
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to **NCBLIT_2x1** at the cost of some potential resolution. The alternatives
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**scalehi** and **hires** use the highest-resolution non-pixel blitter
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available. Pixel blitting is never performed unless explicitly requested with
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**-bpixel**.
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Blitters can be selected at runtime by pressing '0' through '6'.
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**NCBLIT_DEFAULT** corresponds to '0'. The various blitters are described in
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**notcurses_visual(3)**. If a blitter cannot be used in the current environment,
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the current blitter will be retained.
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Multiframe media can be paused with space. Press space (or any other valid
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control) to resume.
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# NOTES
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If you're looking for a fast, inline image viewer for the shell, try using
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**ncplayer -k -t0 -q**.
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Optimal display requires a terminal advertising the **rgb** terminfo(5)
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capability, or that the environment variable **COLORTERM** is defined to
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**24bit** (and that the terminal honors this variable), along with a
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fixed-width font with good coverage of the Unicode Block Drawing Characters.
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# BUGS
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Direct mode is kinda fundamentally suboptimal for multiframe media, and
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is not yet supported with **-L** nor **-d**. Top, right, and bottom
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margins are ignored without warning when using direct mode.
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# SEE ALSO
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**notcurses(3)**,
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**notcurses_direct(3)**,
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**notcurses_visual(3)**,
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**terminfo(5)**,
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**unicode(7)**
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