Use a specific input plugin with options for opening media sources.Use -list-input to list available plugins and -list-plugin-parameters <plugin> to list all supported options

Set audio processing options

q=<number> (1..5, default: 2)

Conversion Quality

Set the conversion quality for format conversions. Lower quality means more speed. Values above 3 enable slow high quality calculations.

dm=<string>

Supported strings: auto none rect tri shaped

Default: auto

Dither mode

Dither mode. Auto means to use the quality level. Subsequent options are ordered by increasing quality (i.e. decreasing speed).

sm=<string>

Supported strings: auto zoh linear sinc_fast sinc_medium sinc_best

Default: auto

Resample mode

Resample mode. Auto means to use the quality level. Subsequent options are ordered by increasing quality (i.e. decreasing speed).

fixed_channel_setup=[1|0] (default: 0)

Fixed channel setup

If disabled, the output channel configuration is taken from the source. If enabled, the setup you specify below us used.

num_front_channels=<number> (1..5, default: 2)

Front channels

num_rear_channels=<number> (0..3, default: 0)

Rear channels

num_lfe_channels=[1|0] (default: 0)

LFE

front_to_rear=<string>

Supported strings: mute copy diff

Default: copy

Front to rear mode

Mix mode when the output format has rear channels, but the source doesn't.

stereo_to_mono=<string>

Supported strings: left right mix

Default: mix

Stereo to mono mode

Mix mode when downmixing Stereo to Mono.

Set video processing options

q=<number> (1..5, default: 2)

Conversion Quality

Set the conversion quality for format conversions. Lower quality means more speed. Values above 3 enable slow high quality calculations.

alpha_mode=<string>

Supported strings: ignore blend_color

Default: ignore

Alpha mode

This option is used if the source has an alpha (=transparency) channel, but the output supports no transparency. Either, the transparency is ignored, or the background color you specify below is blended in.

background_color=<r>,<g>,<b> (default: 0.000,0.000,0.000)

<r>, <g> and <b> are in the range 0.0..1.0

Background color

Background color to use, when alpha mode above is "Blend background color".

rc=[1|0] (default: 0)

Resample chroma

Always perform chroma resampling if chroma subsampling factors or chroma placements are different. Usually, this is only done for qualities above 3.

skip=[1|0] (default: 1)

Skip frames

Skip frames to keep A/V sync

threads=<number> (1..1024, default: 1)

Number of threads

Threads to launch for processing operations. Changing this requires program restart

Set audio output plugin. Use -list-oa to list available plugins and -list-plugin-parameters <plugin> to list all supported options

Set video output plugin. Use -list-ov to list available plugins and -list-plugin-parameters <plugin> to list all supported options

Add an audio filter with options to the chain. This option can be given multiple times. Use -list-fa to list available plugins and -list-plugin-parameters <plugin> to list all supported options

Add a video filter with options to the chain. This option can be given multiple times. Use -list-fv to list available plugins and -list-plugin-parameters <plugin> to list all supported options

Set generic input options

still_framerate=<number> (0..100, default: 10)

Still image repitition rate

When showing still images, gmerlin repeats them periodically to make realtime filter tweaking work.

sync_offset=<number> (-1000..1000, default: 0)

Sync offset [ms]

Use this for playing buggy files, which have a constant offset between audio and video. Use positive values if the video is ahead of audio

Set OSD options

enable_osd=[1|0] (default: 1)

Enable OSD

mode=<string>

Supported strings: simple box outline

Default: box

Mode

fontname=<string> (Default: Sans Bold 20)

Font

color=<r>,<g>,<b>,<a> (default: 1.000,1.000,1.000,1.000)

<r>, <g>, <b> and <a> are in the range 0.0..1.0

Foreground color

border_color=<r>,<g>,<b> (default: 0.000,0.000,0.000)

<r>, <g> and <b> are in the range 0.0..1.0

Border color

border_width=<number> (0.00..10.00, default: 0.00)

Border width

justify_h=<string>

Supported strings: center left right

Default: center

Horizontal justify

justify_v=<string>

Supported strings: center top bottom

Default: center

Vertical justify

border_left=<number> (0..65535, default: 10)

Left border

Distance from the left text border to the image border

border_right=<number> (0..65535, default: 10)

Right border

Distance from the right text border to the image border

border_top=<number> (0..65535, default: 10)

Top border

Distance from the top text border to the image border

border_bottom=<number> (0..65535, default: 10)

Bottom border

Distance from the bottom text border to the image border

box_color=<r>,<g>,<b>,<a> (default: 0.200,0.200,0.200,0.700)

<r>, <g>, <b> and <a> are in the range 0.0..1.0

Box color

box_radius=<number> (0..20, default: 10)

Box corner radius

box_padding=<number> (0..20, default: 10)

Box padding

duration=<number> (0..10000, default: 2000)

Duration (milliseconds)

Disable time display

Use ncurses frontend

Set volume (0.0 - 1.0)

<track_spec> can be a ranges mixed with comma separated tracks

Selects audio stream index (starting with 1)

Selects subtitle stream index (starting with 1)

Select audio recoder plugin. Use -list-ra to list available plugins and -list-plugin-parameters <plugin> to list all supported options

Use -list-rv to list available plugins and -list-plugin-parameters <plugin> to list all supported options

List the names of the installed input plugins

List the names of the installed audio output plugins

List the names of the installed video output plugins

List the names of the installed audio filter plugins

List the names of the installed video filter plugins

List the names of the installed audio recorder plugins

List the names of the installed video recorder plugins

List the parameters supported by the plugin

Print this help message and exit

Print this help message as a manual page and exit

Print this help message in texinfo format and exit

Print version info and exit

Set verbosity level (0..4)

Log to syslog the specified name

Always log to stderr

Cache of the plugin registry (shared by all applications)

Default plugin parameters are read from there. Use gmerlin_plugincfg to change them.