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openSUSE:Recording presentation
tagline: From openSUSE
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Recording setup
This is the proposed setup (idea taken from debconf-video team, after working with their equipment once). This setup is designed to avoid any postprocessing (making all the steps detailled further down obsolete). We aim at doing everything on-site for the following benefits:
- Recordings are available in a timely manner.
- Allow live broadcast as an add-on feature.
- Avoid tiresome and repetitive low-fun work.
- Avoid backlog and simplify management of recording, especially for multiple tracks over several days.
- Have more fun while working.
For comparison, please also check our pointers to alternate setups.
Equipment
Rundown of needed gear for the 2012 setup. This takes into account the slides presentation and allows us to do picture in picture. I.e. make the speaker visible in small, while showing the slides in full.
We ressort to a) existing Hardware owned by SUSE, b) existing Hardware privatly owned. c) New equipment bought through both openSUSE and SUSE cost centers. We plan to eliminate the use of b) later in 2012, through c).
Storage
Limited storage capacity is avaliable in Nuremberg, room 3.2.24 (trainee-lab), 2.1.8 (office jw) while most of the Equipment is in the Storage space behind the All-Hands-Area. Juergen (jw) and Christopher (cwh) take care of labeling, listing and transportation. The current inventory is listed here: https://docs.google.com/spreadsheet/ccc?key=0Au7gtaw-TZXldC0xS3JBQ19kOTduTGRTRXlFZC1qS2c#gid=0
We need more dedicated storage space in Nuremberg later in 2012.
Units
Assuming the room has
- Video Projector (we hook into the existing VGA cable)
- Microphones and Speakers, (we need an XLR output)
- A small desk with LAN and power, where Laptop operators can work.
- A safe place for the main Camera tripod.
For openSUSE conference, we assemble 3 units, each comprising
- Mixer Laptop (with Firewire & Gbit)
- Mini-PC (dual Firewire & Gbit)
- VGA-grabber with Splitter: Canopus Twinpact 100
- Main HDV-Camera (Canon Legria HV20, HV30, HV40)
- Backup DV-Camera (suse's old Sony VX2000; Canon MV450 etc from ebay.)
- 2x Camera tripod (the better one for the main camera)
- Cables: 3x Firewire 3m, 3x XLR 10m each, 2x Eth 10m+30m, Power lines, gbit-switch
- Audio Mixer with Compressor BEHRINGER XENYX 1204, with headphones & cables.
Additional helpful gear (single items, not per unit)
- Portable USB Harddisks for moving recordings around.
- An HDMI to VGA converter to help presenters with Tablet-PCs.
- One VGA adapter for iBooks.
- One cheap XLR Cable Microphone, just in case.
Software
DVswitch is built for openSUSE 11.4, 12.1, and 12.2:
See Juergen's HOWTO for using a twinpact 100.
Staff needed
- Host (helps speakers with headset and VGA connector)
- Audio Engineer (operates the mixer, responsible for Speaker volume, mic quality)
- Cameraman (keeps speaker in the frame)
- Director (switches between camera, slides, title-loop, pip)
Depending on experience, these roles can be merged into fewer persons.
Announcements and Coordination
Coordination is often done via private email. Sorry for this non-transparent medium. We better use
- freenode: #opensuse-video
- video@opensuse.org
from now on. Please also subscribe there for video notifications.
Post processing the recording
The above proposed setup would minimize post processing, as all material is directly available on harddisk. The typical postprocessing is a simple
ffmpeg -i file:INPUT.dv -deinterlace OUTPUT.webm
This reduces ca. 6GB per hour to ca. 100MB per hour.
The description below assumes the old setup, from 2011 and earlier, where we are rewinding tapes and spending hours in post production. It is here only for reference.
Tools
To get a raw dv file on disk, connect the camera with firewire, rewind the tape and grab the recording with (as root):
dvgrab -size 0 dvout
To grab live data from the plugged in camera:
dvgrab -size 0 -noavc dvout
KDEnlive
With version 0.7.8 of kdenlive we found our tool of choice to create the openSUSE videos. Grab it from Packman (1-click).
Templates
You can download the template we use to create the talk recordings with the openSUSE logo in the upper right corner and a startscreen that displays the topic.
- File:FOSDEM2011-KDENLIVE-TEMPLATE.tgz.doc used for FOSDEM 2011
Publish the media
See https://en.opensuse.org/openSUSE:Video_Recording/Notice_Template for instructions how to properly announce recordings.
In general we asume all our presentations are public. We welcome external guests, both as speakers and audience. Recordings or live video feeds are shared with our community and the public in general unless there is reason not to do so. If you (as speaker or audience) want to restrict distribution, please let us know before the presentation [1]. Public recordings are listed on http://www.youtube.com/user/opensusetv while others are accessible only with a direct link.
If you announce a presentation, please also make sure that video recording is mentioned in the announcement, and clearly say if it is wanted for public, or for internal audience only.
We understand that the copyright remains with the authors, with the production team and supporting companies potentially acting as contributing authors. Unless exceptions are mentioned, we distribute our footage under CC-BY-3.0 license. Feel free to suggest a dual license model if needed.
streaming.nue.suse.com
streaming.nue.suse.com is the internal video server for hosting both, recordings, and live streaming. All videos (done by the openSUSE Video Team) are uploaded here, including those that are also on youtube and elsewhere.
live-stream at bambuser
http://bambuser.com/channel/opensusetv is a promising candiate for providing live streams. The live Encoder can be implemented like this:
ffmpeg -v -re -i ... -af aresample=22050 -s 480x360 -vcodec flv -b:v 300k -g 150 -cmp 2 -subcmp 2 -mbd 2 -f flv rtmp://NNNNN.fme.bambuser.com/b-fme/XXXXXXXXXXXXXXXXXXXXXXXXXX
The magic credentials for this are owned by Jürgen Weigert <jw@suse.de> .
wiki
Please add talks to the openSUSE:Tube page, for conferences we have dedicated pages, such as Fosdem 2008, Fosdem 2009.
Syntax see: Adding Videos to openSUSE wiki.
opensuse.blip.tv
Andrew Wafaa started a dedicated openSUSE channel on opensuse.blip.tv. Ask FunkyPenguin or digitltom in irc to get files published there.
Files from blip.tv will automatically be pushed to our youtube channel.
SUSE internal
Other videos, where permission to publish externally is unsure, or clearly not granted, are linked here:
If you can follow these link from outside of suse, let us know. If you find a video there, that can go public, let us know too.
Lunch & Learn
Some of the Lunch and Learn Presentations are public. For References, the complete list is available internally at: