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Video Looper Alsa Volume
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Video Looper Alsa Volume

by daboubet on Wed Aug 05, 2020 6:02 am

Hello everyone, I really hope someone can help. I'm an inexperienced user of the Raspberry. Im setting up a video looper (Raspberry Pi Video Looper). I managed to set up the whole video and its configuration trough the "video_looper.ini" file, but I still need to change the volume trough the Alsa configuration. It seems that I have to add a .txt file with a string where it says the value of the required volume. I have tried adding this file but doesn't work. Here I describe what I have been making until now. Maybe someone could offer some hints about this. I have been trying for days now without success :(.

changed the "video_looper.ini" configuration to:

Code: Select all | TOGGLE FULL SIZE
# Main configuration file for video looper.
# You can change settings like what video player is used or where to search for
# movie files.  Lines that begin with # are comments that will be ignored.
# Uncomment a line by removing its preceding # character.

# Video looper configuration block follows.

# set which video player will be used to play movies.  Can be either omxplayer or
# hello_video.  omxplayer can play common formats like , mov, mp4, etc. and
# with full audio and video, but it has a small ~100ms delay between videos.
# if there is only one video omxplayer can also loop seamlessly
# hello_video is a simpler player that doesn't do audio and only plays raw H264
# streams, but loops videos seamlessly if one video is played more than once.  The default is omxplayer.
video_player = omxplayer
#video_player = hello_video

# Where to find movie files.  Can be either usb_drive or directory.  When using
# usb_drive any USB stick inserted in to the Pi will be automatically mounted
# and searched for video files (only in the root directory).  Alternatively the
# directory option will search only a specified directory on the SD card for
# movie files.  Note that you change the directory by modifying the setting in
# the [directory] section below.  The default is usb_drive.
#file_reader = usb_drive
file_reader = directory
#file_reader = usb_drive_copymode

# Copy-Mode:
# If you enable this mode, movies are copied from the usb stick to the path specified
# in the [directory] section below.
# see additonal settings for copy-mode in the [copymode] section

# The rest of the configuration for video looper below is optional and can be
# ignored.

# Control whether informative messages about the current player state are
# displayed, like the number of movies loaded or if it's waiting to load movies.
# Default is true to display these messages, but can be set to false to disable
# them entirely.
osd = true
#osd = false

#Below you can set for how many secounds the osd (and countdown) is displayed after files are found
countdown_time = 5

# Below you can set a timout time (in seconds) that is waited between each videos
# wait time is not honored for the first video that plays after starting a new playlist (e.g. after plugging in usb drive)
# when using a self looping player like hello_video wait_time is not waited between each repeat of one video but between different videos
# with omxplayer wait_time will also happen between every repeat of a video
wait_time = 0

# To play random playlist.
is_random = false

# Control the program via keyboard
# If enabled, hit ESC key to quit the program anytime (except countdown).
keyboard_control = true
#keyboard_control = false

# Set the background to a custom image
# This image is displayed between movies
# Can potentially look broken if video resolution is smaller than display resolution
# bgimage = /home/pi/static/bg.png
bgimage =

# Change the color of the background that is displayed behind movies (only works
# with omxplayer).  Provide 3 numeric values from 0 to 255 separated by a commma
# for the red, green, and blue color value.  Default is 0, 0, 0 or black.
bgcolor = 0, 0, 0

# Change the color of the foreground text that is displayed with the on screen
# display messages.  Provide 3 numeric values in the same format as bgcolor
# above.  Default is 255, 255, 255 or white.
fgcolor = 255, 255, 255

# Output program state to standard output if true.
# Useful for debugging to see whats going on behind the scenes
console_output = false
#console_output = true

# Directory file reader configuration follows.

# The path to search for movies when using the directory file reader.
path = /home/pi/

# USB drive file reader configuration follows.

# The path to mount new USB drives.  A number will be appended to the path for
# each mounted drive (i.e. /mnt/usbdrive0, /mnt/usbdrive1, etc.).
mount_path = /mnt/usbdrive

# Whether to mount the USB drives as readonly (true) or writable (false).  It is
# recommended to mount USB drives readonly for reliability.
readonly = true

# this setting controls what happens when a usb drive is plugged in while in copymode
# the default setting "replace" clears out the video directory and then copies the files from the drive
# with add files from the drive are copied to the directory in addition to existing files
# NOTE: files with the same name are always overwritten
# copymode setting can be overridden by placing a file named "replace" or "add" on the drive (extension does not matter)

mode = replace
#mode = add

# with this setting you can control if a file named "loader.png" should be copied from the drive to be used eg as a background
# the file is copied to /home/pi/loader.png
copyloader = false
#copyloader = true

# this setting defines a "password" that has to exists as a file (with the password as a filename) (extension does not matter)
# on the usb drive for the videolooper to accept videos from the usb drive
# default is videopi - you should consider changing it - if it is emtpy no check will be performed
# for maximum compatibility use only ascii characters
password = videopi

# This setting allows for a fixed playlist.

# Path to the playlist file.
# If you enter a relative path (not starting with /) it is considered relative to the selected file_reader path (directory or USB drive).
# Leave empty to not use a playlist and play all the files in the file_reader path (directory or USB drive).
path =
#path = playlist.m3u

# ALSA configuration follows.
# This only applies when using omxplayer with sound = alsa.

# ALSA hardware device to use for sound output.  This consists of the card
# number and subdevice number separated by a comma, e.g. '1,0'.  Run
# 'aplay -l' to list available devices.  If empty, the default output device is
# used.
#hw_device =
hw_device = 1,0

# Volume of the hardware device can be set using a text file provided with the
# video files.  If the file does not exist, the hardware volume will remain
# unchanged.  This setting specifies the name of the text file.
# The file should contain a single line with an amixer-compatible volume value,
# such as '50%' or '-10db'.
#hw_vol_file =
hw_vol_file = alsa_volume

# Name of the ALSA control to use for adjusting volume.  Typically this will be
# 'PCM'.  Run 'amixer -c N scontrols' (where N is the card number of your output
# device) to list available controls.
hw_vol_control = PCM

# omxplayer configuration follows.

# List of supported file extensions.  Must be comma separated and should not
# include the dot at the start of the extension.
extensions = mov, mkv, mp4, m4v

# Sound output for omxplayer, either hdmi, local, both or alsa.  When set to
# hdmi the video sound will be played on the HDMI output, and when set to local
# the sound will be played on the analog audio output.  A value of both will
# play sound on both HDMI and the analog output.  A value of alsa will play
# sound through ALSA, using the device specified in the [alsa] section above.
# The both value is the default.
#sound = both
#sound = hdmi
#sound = local
sound = alsa

# Sound volume output for the video player will be read from  a  file  near  the
# video files. If the file does not exist, a default volume of 0db will be used.
# To use this feature create a file in the same directory as the videos and name
# it the value defined below (like 'sound_volume' by default), then inside the
# file add a single line with the volume value in text to pass to omxplayer (using
# its --vol option which takes a value in millibels).
# NOTE: This may introduce audible quantization error. Using hw_vol_file will
# generally give better sound quality.
sound_vol_file = sound_volume

# Fixed playlists may embed titles, which can be shown. See playlist section above.
# If no fixed playlist is given, titles are simply filenames without extensions.
show_titles = false
#show_titles = true

# Title duration in seconds. -1 means endless.
title_duration = 10

# Any extra command line arguments to pass to omxplayer.  It is not recommended
# that you change this unless you have a specific need to do so!  The audio and
# video FIFO buffers are kept low to reduce clipping ends of movie at loop.
# Run 'omxplayer -h' to have the full list of parameters.
extra_args = --no-osd --audio_fifo 0.01 --video_fifo 0.01 --align center --font-size 55

# hello_video player configuration follows.

# List of supported file extensions.  Must be comma separated and should not
# include the dot at the start of the extension.
extensions = h264

Added a .txt file named "alsa_volume" with the text: "amixer -c 1 -- sset Master playback -20dB"

Put the file in the same folder as the video.

Thanks in advance, i would be thankful for some help!
best, Daniel

Posts: 1
Joined: Wed Aug 05, 2020 5:40 am

Please be positive and constructive with your questions and comments.