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--- operation:framegrabbing [2016/03/22 20:44] – moved, partially translated danimo
+++ operation:framegrabbing [2017/04/03 19:08] (current) – andi
@@ Line 1: / Line 1: @@
+= Ephiphan Broadcaster operation
+== Settings
+The best working settings depended on hardware generation, see [[hardware:epiphan-broadcaster]]
+The Admin-UI can be accessed by appending /admin to the URL (ie http://grabber3/admin).
+Login is in the Keepass.
+== Operational notes
+Some projector setups require a custom resolution on the Broadcaster configuration to work properly.
+Typical howto:
+ * Generate a EDID file by connecting the mixer laptop (or another linux box) to the projector and run make-edid.pl.
+ * cat/copy output to file on a machine with an web browser (currently not the mixer laptops, due to florolf ;-)
+ * open http://grabberX.lan.c3voc.de/admin/
+ * goto framegrabber settings
+ * upload edid file via upload form
+ * After replacing the EDID file, the Broadcaster does not need to be restarted. Dis- and reconnecting the cable from the computer's display port is sufficient.
+ * If you see "Cannot update EDID. Please verify integrity and authenticity of the EDID file. E1011-3", this is usually resolved by dis- and reconnecting the cable leading towards the projector.
+How to get a EDID file:
+ * Preferred way: Script by Florolf that will create EDID files for the projector/display connected at a given machine: https://github.com/voc/scripts/blob/master/vgabroadcaster/make-edid.pl
+If you want to force a special resolution, or subset of resolutions (e.g. prefer 16:9, no 16:10 only fallback 4:3)
+ * http://www.epiphan.com/support/vgadvi-broadcaster-drivers-documentation/ -> Downloads -> EDID
+   * see also https://github.com/voc/scripts/tree/master/vgabroadcaster/edid-files
+ * FIXME how to allow multiple resolutions at once? Concatenate EDID Files?
+   * Rumor has it https://ez.analog.com/docs/DOC-2143 will make it work. Otherwise, request the required data from Ephipan support via the support chat on their website {{hardware:edid:customedid_16-9.edid}}
+   * mithro of timvideos pointed us towards http://edid.tv/ und https://github.com/timvideos/edid.tv/tree/master/edid_parser.
+Framegrabber settings: The Web admin interface contains most of the information that you need to make image adjustments including a brief description of the effect of each adjustment and the adjustment range.
+To make an adjustment, add a value to one or more fields and select Apply.
+**To clear any adjustments, delete the value from one or more fields and select Apply. To have changes take effect, you must reboot the VGA Broadcaster Lite device.** You can make more than one change before selecting Apply and rebooting.
 == Use of Broadcasters with DVSwitch
@@ Line 5: / Line 41: @@
 Assuming a 16:9 projector, use the following line to feed the mjpeg stream to DVSwitch:
-Sofern man einen 16:9 Projektor hat kommt folgende Zeile zum Einsatz:
 <code>
 ffmpeg -i http://10.73.x.2:1881/vgabroadcaster.mjpg \
@@ Line 12: / Line 47: @@
 </code>
-Sie nimmt das Bild vom Framegrabber und zerrt es so weit auf, das das Video-Bild komplett gefüllt ist. Hat man einen Projektor der zwingend eine 4:3 Auflösung vom Broadcaster baucht muss man (nachdem einspielen der entsprechenden EDID Datei, siehe oben) in DVswitch links und rechts schwarze Balken hinzufügen. Dazu ersetzt man in der /etc/services/grabbersource die obrige Zeile durch folgende bzw. fügt die Filteroption an der richtigen Stelle ein:
+This fetches the image off the framegraber and distorts it to fill the video image. If the projector requires a 4:3 resolution, uou first need to upload an EDID file to the broadcaster (see respective section). Next, you need to add artifical bars on the left and on the right by replacing above line in /etc/services/grabbersource by this (or by modfiying it accordingly):
 <code>ffmpeg -i http://10.73.x.2:1881/vgabroadcaster.mjpg \
@@ Line 19: / Line 54: @@
 dvsource-file-voc -h "10.73.x.1" -i 1 -p 2000 /dev/stdin</code>
-Das einzige Problem das man jetzt noch hat sind Vortragende die mit 16:9 Folien kommen. Der Rechner des Vortragenden macht oben und unten schwarze Streifen hin, die obrige Zeile links und rechts. Insgesammt wird die Folie also viel kleiner dargestellt als eigentlich notwendig. Es empfiehlt sich eine weitere Quelle anzulegen, die die schwarzen streifen vom Laptop weg schneidet. Dazu z.B. folgende Zeile auf encoderX in einem Screen laufen lassen:
+A final problem that you might be facing is a presenter with 16:9 slides. The computer of the speaker will add black rows on top and bottom to accomodate for the 4:3 aspect. In total, this will now have borders on all four sides and make the slides appear much smaller than necessary.
+The recommendd workaround is to add a second source that cuts off the black bars received from the laptop. Run the following line inside a screen session on one of the encoders:
 <code>ffmpeg -i http://10.73.x.2:1881/vgabroadcaster.mjpg \
   -filter:v 'crop=h=3/4*in_h, scale=720:576' \
@@ Line 26: / Line 62: @@
 dvsource-file-voc -h "10.73.x.1" -i 5 -p 2000 /dev/stdin</code>
+== Misc
-== Settings
+The broadcasters are available via 192.168.255.250, no matter which IP is configured on the web interface. To reach it, set up your computer with IP address 192.168.255.249 using 255.255.255.252 as netmask.
-MJPEG with “Default” setting (not “High speed”)
+The integrated 4 GB USB stick fits 3-4 hours of video at 1280x720 (H264, incl. Audio). The broadcaster can be configured such that it doesn't record anything if there is no input signal (VGA/DVI).
-fps
-no audio
-no recording
-== hax0r
+It can take up to 10 minutes for the broadcaster to come up.
-broadcaster lite partition layout
+If you wish to replace the USB stick with a larger model, please make sure to ext-3-format the stick and move the files from the old stick. Do not use dd.
-<code>
-Disk /dev/sdc: 1967 MB, 1967128576 bytes
-heads, 62 sectors/track, 1015 cylinders, total 3842048 sectors
-Units = sectors of 1 * 512 = 512 bytes
-Sector size (logical/physical): 512 bytes / 512 bytes
-I/O size (minimum/optimal): 512 bytes / 512 bytes
-Disk identifier: 0x00000000
-   Device Boot      Start         End      Blocks   Id  System
-/dev/sdc1   *           1     1051395      525697+   b  W95 FAT32
-/dev/sdc2   *     1051396     3838729     1393667   83  Linux
-</code>