Webcam Support - Revision history

GI7UGV: /* Compatibility */

2019-03-11T09:28:52Z

Compatibility

G8GKQ: /* Compatibility */

2018-10-28T18:38:59Z

Compatibility

G8GKQ: /* Compatibility */

2018-10-28T12:48:47Z

Compatibility

G8GKQ at 12:46, 28 October 2018

2018-10-28T12:46:29Z

G8GKQ at 11:41, 21 March 2018

2018-03-21T11:41:46Z

G8GKQ at 22:52, 14 March 2018

2018-03-14T22:52:00Z

G8GKQ at 15:29, 7 March 2018

2018-03-07T15:29:46Z

G8GKQ at 15:17, 7 March 2018

2018-03-07T15:17:02Z

G8GKQ: Created page with "Portsdown software version 201803060 introduces proper support for some Logitech Webcams. The only versions tested so far are the Logitech C170 (a very old basic 640x480 devi..."

2018-03-07T10:07:57Z

Created page with "Portsdown software version 201803060 introduces proper support for some Logitech Webcams. The only versions tested so far are the Logitech C170 (a very old basic 640x480 devi..."

New page

Portsdown software version 201803060 introduces proper support for some Logitech Webcams. The only versions tested so far are the Logitech C170 (a very old basic 640x480 device) and the Logitech C920 (full HD with internal H264 encoding).

Normal Webcam Modes

Selecting Webcam as the source from the source menu will take the video input from the Webcam and output it at close to the selected resolution.

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 ===Compatibility===
-In Portsdown Stretch (the current latest software), the use of a Webcam with the RPi Camera connected requires that the webcam is unplugged at boot, and only plugged in once the Portsdown has booted up.  This is because of an incompatibility between the way that the RPi Camera drivers are loaded and the way that the Webcam drivers are loaded.  This problem could be corrected if anyone is prepared to develop suitable udev rules to sort it out.  It is beyond the capability of the current Portsdown team - any volunteers?
+In Portsdown Stretch (pre 201902072), the use of a Webcam with the RPi Camera connected requires that the webcam is unplugged at boot, and only plugged in once the Portsdown has booted up. This is because of an incompatibility between the way that the RPi Camera drivers are loaded and the way that the Webcam drivers are loaded. There is no issue if the RPi Camera is not connected.
-There is no issue if the RPi Camera is not connected.
+Note that if you do boot-up with the Webcam and Pi Camera both connected, the Portsdown will not cleanly shutdown.  It hangs half-way through shutdown, but may then be safely powered off.
-Note that if you do boot-up with the Webcam and Pi Camera both connected, the Portsdown will not cleanly shutdown.  It hangs half-way through shutdown, but may then be safely powered off.
+The incompatibility issue has been resolved since Portsdown Stretch update 201902072 and the two cameras should now co-exist.
 ===Normal Webcam Modes===

← Older revision		Revision as of 18:38, 28 October 2018
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	There is no issue if the RPi Camera is not connected.		There is no issue if the RPi Camera is not connected.
		+
		+	Note that if you do boot-up with the Webcam and Pi Camera both connected, the Portsdown will not cleanly shutdown. It hangs half-way through shutdown, but may then be safely powered off.

	===Normal Webcam Modes===		===Normal Webcam Modes===

← Older revision		Revision as of 12:48, 28 October 2018
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	In Portsdown Stretch (the current latest software), the use of a Webcam with the RPi Camera connected requires that the webcam is unplugged at boot, and only plugged in once the Portsdown has booted up. This is because of an incompatibility between the way that the RPi Camera drivers are loaded and the way that the Webcam drivers are loaded. This problem could be corrected if anyone is prepared to develop suitable udev rules to sort it out. It is beyond the capability of the current Portsdown team - any volunteers?		In Portsdown Stretch (the current latest software), the use of a Webcam with the RPi Camera connected requires that the webcam is unplugged at boot, and only plugged in once the Portsdown has booted up. This is because of an incompatibility between the way that the RPi Camera drivers are loaded and the way that the Webcam drivers are loaded. This problem could be corrected if anyone is prepared to develop suitable udev rules to sort it out. It is beyond the capability of the current Portsdown team - any volunteers?
		+
		+	There is no issue if the RPi Camera is not connected.

	===Normal Webcam Modes===		===Normal Webcam Modes===

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-Portsdown software version 201803061 introduces proper support for some Logitech Webcams.  The only versions tested so far are the Logitech C170 (a very old basic 640x480 device), the Logitech C525, the Logitech C910 and the Logitech C920 (full HD with internal H264 encoding).
+Portsdown software version 201803061 introduces proper support for some Logitech Webcams.  The only versions tested so far are the Logitech C170 (a very old basic 640x480 device), the Logitech C310, the Logitech C525, the Logitech C910 and the Logitech C920 (full HD with internal H264 encoding).
 ===Normal Webcam Modes===
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 ===C920 H264 Webcam Mode===
-The Logitech C920 can output H264 encoded video with audio at a fixed bit rate.  The Portsdown software has been modified to accept this stream and transmit it.  Just select C920 as the video source, H264 encoding and then select the resolution that you want.  As the stream is at a fixed bit rate of 3.4 MBit/s (for all resolutions), the Portsdown needs to be set up to transmit at 2MS, 7/8 FEC.  TRANSMISSIONS AT OTHER SRs and FECs ARE UNLIKELY TO WORK.
+The Logitech C920 can output H264 encoded video with audio at a fixed bit rate.  The Portsdown software has been modified to accept this stream and transmit it.  Just select C920 as the video source, H264 encoding and then select the resolution that you want.  As the stream is at a fixed bit rate of 3.4 MBit/s (for all resolutions), the Portsdown needs to be set up to transmit at 2MS or more, 7/8 FEC.  TRANSMISSIONS AT LOWER SRs and FECs ARE UNLIKELY TO WORK.

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-Portsdown software version 201803061 introduces proper support for some Logitech Webcams.  The only versions tested so far are the Logitech C170 (a very old basic 640x480 device), the Logitech C525 and the Logitech C920 (full HD with internal H264 encoding).
+Portsdown software version 201803061 introduces proper support for some Logitech Webcams.  The only versions tested so far are the Logitech C170 (a very old basic 640x480 device), the Logitech C525, the Logitech C910 and the Logitech C920 (full HD with internal H264 encoding).
 ===Normal Webcam Modes===
-In the normal webcam modes, the webcam acts just the same as any video source and can be encoded in MPEG-2 (with audio) or H264 (without audio).
+In the normal webcam modes, the webcam acts just the same as any video source and can be encoded in MPEG-2 (with audio) or H264 (without audio).  Some Webcams will also work at 576p and 720p widescreen resolutions.
-The normal Webcam modes have been tested with The Logitech C170, C525 and C920.  They should work with the Logitech C270.  If you have another Logitech webcam that you would like included please report it on the BATC Forum and we will try to modify the software for compatibility.
+The normal Webcam modes have been tested with The Logitech C170, C525, C910 and C920.  They should work with the Logitech C270.  If you have another Logitech webcam that you would like included please report it on the BATC Forum and we will try to modify the software for compatibility.
-Selecting Webcam as the source from the source menu will take the video input from the Webcam and output it at close to the selected resolution.  Many Webcams are limited to set resolutions and you may find that the image size produced in 4:3 mode is 640x480 rather than 720x576.  The mono audio from older webcams is reproduced as a single channel and the stereo audio from the C920 is reproduced as stereo (in MPEG-2 modes).
+Selecting Webcam as the source from the source menu will take the video input from the Webcam and output it at close to the selected resolution.  Many Webcams are limited to set resolutions and you may find that the image size produced in 4:3 mode is 640x480 rather than 720x576.  The mono audio from older webcams is reproduced as a single channel and the stereo audio from the C910 and C920 is reproduced as stereo (in MPEG-2 modes).
-At the end of a transmission using the Logitech C525 (or C270) the driver needs time to be reset.  Do not touch the touchscreen during this time - this causes unpredictable results.  To be cured in a future version!
+At the end of a transmission using the Logitech C270, C525 or C910 the camera driver needs time to be reset.  During this 3 second reset process, the touchscreen does not respond to commands.  After the reset, the touchscreen is re-enabled.
 ===C920 H264 Webcam Mode===
 The Logitech C920 can output H264 encoded video with audio at a fixed bit rate.  The Portsdown software has been modified to accept this stream and transmit it.  Just select C920 as the video source, H264 encoding and then select the resolution that you want.  As the stream is at a fixed bit rate of 3.4 MBit/s (for all resolutions), the Portsdown needs to be set up to transmit at 2MS, 7/8 FEC.  TRANSMISSIONS AT OTHER SRs and FECs ARE UNLIKELY TO WORK.

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 ===Normal Webcam Modes===
 The normal Webcam modes have been tested with The Logitech C170 and the Logitech C920.  They should work with the Logitech C270 and the Logitech C525.  If you have another Logitech webcam that you would like included please report it on the BATC Forum and we will try to modify the software for compatibility.
@@ Line 9: / Line 11: @@
 ===C920 H264 Webcam Mode===
-The Logitech C920 can output H264 encoded video with audio at a fixed bit rate.  The Portsdown software has been modified to accept this stream and transmit it.  As the stream is at a fixed bit rate of 3.4 MBit/s, the Portsdown needs to be set up to transmit at 2MS, 7/8 FEC.  TRANSMISSIONS AT OTHER SRs and FECs ARE UNLIKELY TO WORK.
+The Logitech C920 can output H264 encoded video with audio at a fixed bit rate.  The Portsdown software has been modified to accept this stream and transmit it.  Just select C920 as the video source, H264 encoding and then select the resolution that you want.  As the stream is at a fixed bit rate of 3.4 MBit/s (for all resolutions), the Portsdown needs to be set up to transmit at 2MS, 7/8 FEC.  TRANSMISSIONS AT OTHER SRs and FECs ARE UNLIKELY TO WORK.