Audio Switching - Revision history

G8GKQ at 22:48, 14 March 2018

2018-03-14T22:48:50Z

G8GKQ at 20:40, 18 February 2018

2018-02-18T20:40:03Z

G8GKQ: /* Identification of Audio Devices */

2018-01-19T10:42:38Z

Identification of Audio Devices

G8GKQ at 12:52, 11 September 2017

2017-09-11T12:52:07Z

G8GKQ at 19:43, 18 August 2017

2017-08-18T19:43:11Z

G8GKQ at 10:46, 31 July 2017

2017-07-31T10:46:08Z

G8GKQ: /* Identification of Audio Devices */

2017-07-30T19:30:07Z

Identification of Audio Devices

G8GKQ at 19:27, 30 July 2017

2017-07-30T19:27:09Z

G8GKQ at 19:23, 25 July 2017

2017-07-25T19:23:06Z

G8GKQ at 11:51, 25 July 2017

2017-07-25T11:51:18Z

@@ Line 1: / Line 1: @@
-The capability to transmit or stream sound from either the video capture device (EasyCap) or a microphone connected through a cheap USB dongle was overhauled and further developed in software 201707221.  Note that sound is only added to MPEG-2 transmissions.  The capability to add sound to H264 transmissions is being developed, but is not yet ready for release.
+The capability to transmit or stream sound from a microphone connected through a cheap USB dongle, a video capture device (EasyCap) or a Webcam was ofurther developed in software 201803061.  Note that sound is only added to MPEG-2 transmissions.  The capability to add sound to H264 transmissions is only available when a Logitech C920 Webcam is being used.
-In the Console, System Setup, Audio Input menu there are 5 options: auto, mic, video, bleeps and no_audio.  The switching behaviour is as follows:
+On the touchscreen or on the Console (System Setup, Audio Input menu) there are 6 options: auto, USB mic, video (EasyCap), Webcam, Bleeps and no_audio.  The switching behaviour is as follows:
 . If "no_audio" is selected, no audio stream is generated.
@@ Line 7: / Line 7: @@
 . If "bleeps" is selected, mono bleeps are transmitted.
-. If neither an EasyCap or USB Sound Dongle is detected (see below), no audio channel is generated, unless the option for "bleeps" has been requested.  In which case "bleeps" are generated.
+. If no EasyCap, USB Sound Dongle or Webcam is detected (see below), no audio channel is generated, unless the option for "bleeps" has been requested.  In which case "bleeps" are generated.
 . In "auto" mode:
-If both an EasyCap and a USB Sound Dongle are detected, the video source is checked.  If video from the Pi Cam is selected, mono audio from the USB Sound Dongle is transmitted.  If the EasyCap is selected for video, stereo audio from the EasyCap is transmitted.
+If more than one sound source is detected, the video source is checked.  If video from the Pi Cam is selected, mono audio from the USB Sound Dongle is transmitted.  If the EasyCap is selected for video, stereo audio from the EasyCap is transmitted.  If a webcam is selected, audio from the webcam is transmitted
 If only a USB Sound Dongle is detected, mono audio from the USB Sound Dongle is transmitted.
@@ Line 20: / Line 20: @@
 .  In "video" mode, if an EasyCap is detected, stereo audio from the EasyCap is transmitted.  If no EasyCap is detected, but a USB Sound Dongle is, mono audio from the USB Sound Dongle is transmitted.
 ===Identification of Audio Devices===
@@ Line 33: / Line 31: @@
   Head
   Sound Device
   Webcam C525
   U0x46d0x825
@@ Line 43: / Line 42: @@
   Headset [Logitech USB Headset], device 0: USB Audio [USB Audio]
   Device [USB PnP Sound Device], device 0: USB Audio [USB Audio]
   C525 [HD Webcam C525], device 0: USB Audio [USB Audio]
   U0x46d0x825 [USB Device 0x46d:0x825], device 0: USB Audio [USB Audio]  - Logitech C270

@@ Line 58: / Line 58: @@
   AV TO USB
   Grabby
 This takes account of the following devices:
@@ Line 69: / Line 70: @@
   USB20 [AV TO USB2.0], device 0: USB Audio [USB Audio]
   Grabby (TerraTec Grabby), device 0: USB Audio (USB Audio)
 Note that inclusion in this list does not mean that the Portsdown will work with the device for video capture.  All it means is that it can capture audio from it; in particular, the DVC90 and Cx231xxAudio devices will not work for video capture (yet).
 If you want an entry added to either of these lists (which each appear twice between lines 70 and 100 in the file scripts/a.sh) please post full details on the BATC Forum.

@@ Line 25: / Line 25: @@
 ===Identification of Audio Devices===
-Audio devices are identified as being Microphone Dongles or EasyCaps by analysing the response to the Linux command "arecord -l".
+Audio devices are identified as being Microphone Dongles with a single audio channel or EasyCaps with stereo audio channels by analysing the response to the Linux command "arecord -l".
 If the response includes any of the following strings (case sensitive) , the device is classed as a USB Microphone Dongle:
@@ Line 33: / Line 33: @@
   Head
   Sound Device
 This means that the following audio devices are supported by this logic:
@@ Line 41: / Line 43: @@
   Headset [Logitech USB Headset], device 0: USB Audio [USB Audio]
   Device [USB PnP Sound Device], device 0: USB Audio [USB Audio]
 Note that the Samson C01UPro USB Microphone is not supported.  It requires relatively complex Linux driver software that is beyond the scope of this project.
@@ Line 54: / Line 58: @@
   AV TO USB
   Grabby
 This takes account of the following devices:
@@ Line 66: / Line 69: @@
   USB20 [AV TO USB2.0], device 0: USB Audio [USB Audio]
   Grabby (TerraTec Grabby), device 0: USB Audio (USB Audio)
 Note that inclusion in this list does not mean that the Portsdown will work with the device for video capture.  All it means is that it can capture audio from it; in particular, the DVC90 and Cx231xxAudio devices will not work for video capture (yet).
 If you want an entry added to either of these lists (which each appear twice between lines 70 and 100 in the file scripts/a.sh) please post full details on the BATC Forum.

@@ Line 1: / Line 1: @@
-The capability to transmit or stream sound from either the video capture device (EasyCap) or a microphone connected through a cheap USB dongle was overhauled and further developed in software 201707221.
+The capability to transmit or stream sound from either the video capture device (EasyCap) or a microphone connected through a cheap USB dongle was overhauled and further developed in software 201707221.  Note that sound is only added to MPEG-2 transmissions.  The capability to add sound to H264 transmissions is being developed, but is not yet ready for release.
 In the Console, System Setup, Audio Input menu there are 5 options: auto, mic, video, bleeps and no_audio.  The switching behaviour is as follows:
-If "no_audio" is selected, no audio stream is generated.
+. If "no_audio" is selected, no audio stream is generated.
-If "bleeps" is selected, mono bleeps are transmitted.
+. If "bleeps" is selected, mono bleeps are transmitted.
-If neither an EasyCap or USB Sound Dongle is detected (see below), no audio channel is generated, unless the option for "bleeps" has been requested.  In which case "bleeps" are generated.
+. If neither an EasyCap or USB Sound Dongle is detected (see below), no audio channel is generated, unless the option for "bleeps" has been requested.  In which case "bleeps" are generated.
-In "auto" mode:
+. In "auto" mode:
 If both an EasyCap and a USB Sound Dongle are detected, the video source is checked.  If video from the Pi Cam is selected, mono audio from the USB Sound Dongle is transmitted.  If the EasyCap is selected for video, stereo audio from the EasyCap is transmitted.
@@ Line 17: / Line 17: @@
 If only an EasyCap is detected, stereo audio from the EasyCap is transmitted.
-  In "mic" mode, if a USB Sound Dongle is detected, mono audio from the USB Sound Dongle is transmitted.  If no USB Sound Dongle is detected, but an EasyCap is, stereo audio from the EasyCap is transmitted.
+.  In "mic" mode, if a USB Sound Dongle is detected, mono audio from the USB Sound Dongle is transmitted.  If no USB Sound Dongle is detected, but an EasyCap is, stereo audio from the EasyCap is transmitted.
 .  In "video" mode, if an EasyCap is detected, stereo audio from the EasyCap is transmitted.  If no EasyCap is detected, but a USB Sound Dongle is, mono audio from the USB Sound Dongle is transmitted.
@@ Line 41: / Line 41: @@
   Headset [Logitech USB Headset], device 0: USB Audio [USB Audio]
   Device [USB PnP Sound Device], device 0: USB Audio [USB Audio]
 If the response includes any of the following strings, the device is classed as a video capture device:

@@ Line 52: / Line 52: @@
   AV TO USB
   Grabby
 This takes account of the following devices:
@@ Line 63: / Line 64: @@
   USB20 [AV TO USB2.0], device 0: USB Audio [USB Audio]
   Grabby (TerraTec Grabby), device 0: USB Audio (USB Audio)
 Note that inclusion in this list does not mean that the Portsdown will work with the device for video capture.  All it means is that it can capture audio from it; in particular, the DVC90 and Cx231xxAudio devices will not work for video capture (yet).
 If you want an entry added to either of these lists (which each appear twice between lines 70 and 100 in the file scripts/a.sh) please post full details on the BATC Forum.

@@ Line 37: / Line 37: @@
   Device [USB Audio Device], device 0: USB Audio [USB Audio]
   Set [C-Media USB Headphone Set], device 0: USB Audio [USB Audio]
   Headset [Logitech USB Headset], device 0: USB Audio [USB Audio]
   Device [USB PnP Sound Device], device 0: USB Audio [USB Audio]
@@ Line 57: / Line 57: @@
   usbtv [usbtv], device 0: USBTV Audio [USBTV Audio Input]
   U0x534d0x21 [USB Device 0x534d:0x21], device 0: USB Audio [USB Audio]
   STK1160 [STK1160], device 0: USB Audio [USB Audio]
   U0xeb1a0x2861 [USB Device 0xeb1a:0x2861], device 0: USB Audio [USB Audio ]

← Older revision		Revision as of 19:23, 25 July 2017
Line 22:		Line 22:

	The "auto", "mic" and "EC" (video) modes can also be selected from Menu 2 of the Touchscreen.		The "auto", "mic" and "EC" (video) modes can also be selected from Menu 2 of the Touchscreen.
		+
		+	===Identification of Audio Devices===
		+
		+	Audio devices are identified as being Microphone Dongles or EasyCaps by analysing the response to the Linux command "arecord -l".
		+
		+	If the response includes any of the following strings (case sensitive) , the device is classed as a USB Microphone Dongle:
		+
		+	USB Audio Device
		+	USB AUDIO
		+	Head
		+	Sound Device
		+
		+	If the response includes any of the following strings, the device is classed as a video capture device:
		+
		+	usbtv
		+	U0x534d0x21
		+	DVC90
		+	Cx231xxAudio
		+	STK1160
		+	U0xeb1a0x2861
		+	AV TO USB
		+
		+	Note that inclusion in this list does not mean that the Portsdown will work with the device for video capture. All it means is that it can capture audio from it; in particular, the DVC90 and Cx231xxAudio devices will not work for video capture (yet).
		+
		+	If you want an entry added to either of these lists (which each appear twice between lines 70 and 100 in the file scripts/a.sh) please post full details on the BATC Forum.

← Older revision		Revision as of 11:51, 25 July 2017
Line 21:		Line 21:
	6. In "video" mode, if an EasyCap is detected, stereo audio from the EasyCap is transmitted. If no EasyCap is detected, but a USB Sound Dongle is, mono audio from the USB Sound Dongle is transmitted.		6. In "video" mode, if an EasyCap is detected, stereo audio from the EasyCap is transmitted. If no EasyCap is detected, but a USB Sound Dongle is, mono audio from the USB Sound Dongle is transmitted.

−	The "auto", "mic" and ""EC" (video) modes can also be selected from Menu 2 of the Touchscreen.	+	The "auto", "mic" and "EC" (video) modes can also be selected from Menu 2 of the Touchscreen.