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Woodstock 2007: Difference between revisions
about the streaming set-up planned and executed.
Dummy User (talk | contribs) (a lot about the rig) |
Dummy User (talk | contribs) (about the streaming set-up planned and executed.) |
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This broadcast feed then passed through the Coriogen providing overlay from Graphics PC and out to broadcast via the Return feed to Goodricke and the normal infrastructure. | This broadcast feed then passed through the Coriogen providing overlay from Graphics PC and out to broadcast via the Return feed to Goodricke and the normal infrastructure. | ||
== Projection == | |||
Projection at the event got off to a bad start when RAG failed to budget anything for hire of equipment to do it with. Many bold plans were hatched to rig a large screen onto the side of Central Hall to give maximum impact, however costs, lack of a suitable projector and lack of time to design and assemble it conspired against this, and at one point it looked like we might once again be without live event output. However [[Drew Perry]] kindly loaned us a pair of 1800 Lumen projectors, and RAG found 50 to cover the hire of a screen from YSL. YSTV paid another 50 to ship the projectors back to Drew, having used them for [[Birthday Party|YSTV 40]] the following week. | |||
Paired up on the same screen the projectors gave us a reasonable brightness, however it was obviously not going to compete outdoors with no shade until well into the evening. The last-minute decision was taken to cram the 6'x7' screen into the dining hall, and feed the indoor stage mix onto it. This ran for the whole duration of the indoor stage, proving surprisingly visible in the dining hall even with sunlight coming in the windows. After the indoor stage ended, the screen and projectors were then transferred to the outdoor stage, where thanks to good weather we were able to erect the screen in the open on a pair of Ents wind-up stands (suitably ratchet-strapped to the ground), with the projectors in a pile of flight cases back-projecting onto the screen. This provided live output from 9:30pm until the event finished. | |||
== Network Output == | |||
With two stages running continually, there was always a question of what to send round campus. In the end it was decided to pick and choose between the two stages to try and provide a continual broadcast throughout the event. This required an extra video and audio mixer to mix between the two feeds available from the two stages. This was done using the [[Down Stream Keyer]] as a two-input video mixer, and a borrowed Behringer UB802 as an audio mixer. | |||
The audio mix was straight forward enough, with a single mono signal from each of the feeds being mixed into a single mono signal to go to network. Video was a little more complicated, because the DSK requires syncronised video inputs, and one of the video sources (the [[Panasonic Max]]) was a significant distance away, with a shortage of video signals to send it a sync signal. The solution was to lock the local frame-store vision mixer ([[Magic DaVE]]) onto the incoming signal from the Max, so that the two were in sync, following the Max's master oscillator. Thus the DSK could be used to mix between the two video feeds, once the dirt has been worn off the control pot by rattling the T-bar around. | |||
In the main control room the audio was balanced using one channel of Magic Alice, and the video with a Rediffusion video line driver. The audio went off down a standard XLR cable, and the balanced video down a couple of lengths of spare CAT5 cable scrounged from contractors in Goodrike a few years earlier. These ran to the Vanbrugh vent room, where the audio was passively split to go to Vanbrugh Stalls (for local broadcast) and over the return feed back to YSTV in Goodricke. To split the video, it was first de-balanced using a Rediffusion receiver, fed through a composite DA, and re-balanced for the trip to Goodricke. Another output of the DA fed the co-ax cable to Vanbrugh stalls and thence the netbox for the local TVs. | |||
This allowed the station to broadcast to Vanbrugh despite the fact that the single working link between Vanbrugh and Goodricke was in use for the return feed. | |||
== Streaming == | |||
The original intention was to stream both stages in their entirety, on two independent video streams. One would be the normal hardware located in Goodrike, and the other would be a specially commissioned machine located in Vanbrugh and sending the stream back over the campus computer network. This required a separate video return to Goodrick for the stream (as the network would be showing a mixture of stages), as well as the extra computer system, and outlets for two streams at once. | |||
In practise, it didn't get sorted out due to a shortage of people and time. The second return feed was obtained via AV's feed from Central Hall to PX001 and thence the old Derwent return from PX003 to YSTV in Goodricke college. Matthew Tole sorted out some website improvements to support multiple streams, however the computer to encode this 2nd stream was never commissioned - the fact that the TV card supposed to capture the video refused to work wasn't a good start, and computing services also failed to register the MAC address needed to get a network connection in Vanbrugh. | |||
The fall-back position was therefore adopted, with the network video feed being hooked into the main streaming set-up in Goodricke, the single stream carrying the mixture of the two stages, which worked fine. | |||
{{Woodstock}} | |||
{{YSTV Productions}} | |||
[[Category:Productions]] | |||