Write about the sample multicamera data.

diff --git a/futatabi.rst b/futatabi.rst
index c614fcd9cff1bb8b89a0f927c84429097c8225d4..215d374e8d5673c2bb757c520cbe725c4273080b 100644 (file)
--- a/futatabi.rst
+++ b/futatabi.rst
@@ -54,9 +54,42 @@ Getting started
 Sample multicamera data
 '''''''''''''''''''''''
 
+Good multicamera sample video is hard to come by, so it can be hard to
+test or train before an actual event. To alleviate this, I've uploaded some
+real-world video from the very first event where an early version of Futatabi
+was tested. (There are some issues with the JPEG quality, but it should
+largely be unproblematic.) You are free to use these for training or
+demonstration purposes. Do note that they will not be displayed entirely
+correctly in most video players (see :ref:`futatabiformat`), although
+they will certainly be watchable.
+
+There are two files:
+
+ * `Trøndisk 2018, finals only (MJPEG, 77 GB) <https://storage.sesse.net/trondisk2018-finals-multicam-mjpeg.mkv>`_:
+   The final match, in MJPEG format (roughly 52 minutes). This can be downloaded
+   and then fed directly to Nageru as if it were a real camera stream
+   (remember the --slow-down-input option).
+ * `Trøndisk 2018, entire tournament (H.264, 74 GB) <https://storage.sesse.net/trondisk2018-multicam-h264.mp4>`_: The entire tournament,
+   with no cuts (roughly 12 hours). However, due to space and bandwidth
+   constraints, it has been transcoded to H.264 (with some associated
+   quality loss), and needs to be transcoded to MJPEG before Nageru can use it.
+
+Both files are mixed-resolution, with some cameras at 1080p59.94 and some
+at 720p59.94 (one even switches between matches, as the camera was replaced).
+They contain four different camera angles (overview camera on crane, detail camera
+in tripod, two fixed endzone overhead cameras) with differing quality depending
+on the camera operators. In short, they should be realistic input material
+to practice with.
+
+Please download these files only once, instead of streaming them directly over
+HTTP each time you want to test.
+
+
 Transferring data to and from Nageru
 ------------------------------------
 
+.. _futatabiformat:
+
 Video format specification
 ''''''''''''''''''''''''''