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Minor README clarification (max audio gain)

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F. Duncanh
2024-03-09 11:18:26 -05:00
parent 3de745e53b
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18
README.txt
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@@ -481,9 +481,9 @@ below for help with this or other problems.
with UxPlay-1.64, the other method (GStreamer's "*sync=true*" mode),
which uses timestamps in the audio and video streams sent by the
client, is the new default**. On low-decoding-power UxPlay hosts
(such as Raspberry Pi 3 models) this will drop video frames that
cannot be decoded in time to play with the audio, making the video
jerky, but still synchronized.
(such as Raspberry Pi Zero W or 3 B+ models) this will drop video
frames that cannot be decoded in time to play with the audio, making
the video jerky, but still synchronized.
The older method which does not drop late video frames worked well on
more powerful systems, and is still available with the UxPlay option
@@ -506,10 +506,12 @@ helped to prevent this previously when timestamps were not being used.)
takes effect on the audio played by the server.
AirPlay volume-control attenuates volume (gain) by up to -30dB: the
range -30dB:0dB can be rescaled from *Low*:0, or *Low*:*High*, using the
option `-db` ("-db *Low*" or "-db *Low*:*High*"), *Low* must be
negative. Rescaling is linear in decibels. The option `-taper` provides
a "tapered" AirPlay volume-control profile some users may prefer.
decibel range -30:0 can be rescaled from *Low*:0, or *Low*:*High*, using
the option `-db` ("-db *Low*" or "-db *Low*:*High*"), *Low* must be
negative. Rescaling is linear in decibels. Note that GStreamer's audio
format will "clip" any audio gain above +20db, so keep *High* below that
level. The option `-taper` provides a "tapered" AirPlay volume-control
profile some users may prefer.
The -vsync and -async options also allow an optional positive (or
negative) audio-delay adjustment in *milliseconds* for fine-tuning :
@@ -751,7 +753,7 @@ downloads, "UxPlay" for "git clone" downloads) and build/install with
created with "-vs osxvideosink" is initially big, but has the wrong
aspect ratio (stretched image); in this case the aspect ratio
changes when the window width is changed by dragging its side; the
option "-vs osxvideosink force-aspect-ratio=true" can be used to
option `-vs "osxvideosink force-aspect-ratio=true"` can be used to
make the window have the correct aspect ratio when it first opens.
## Building UxPlay on Microsoft Windows, using MSYS2 with the MinGW-64 compiler.