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--- erfavoc [2019/03/12 10:32] – [Audio Technik] derpeter
+++ erfavoc [2026/07/26 21:08] (current) – external edit 127.0.0.1
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-= Erfa Video Setup
+# Erfa / (Hack)space Video Setup
-Live-Streaming and recording setups in CCC Erfas and Hackerspaces.
-Recordings of these groups can be found on [[https://media.ccc.de/b/erfas]]
-== Existing setups in local CCC Erfas
+Live-Streaming and recording setups in CCC Erfas and Hackerspaces.
-  * [[erfa:cccac | CCCAC]]
+Recordings of these groups can be found on
-  * [[erfa:cccb | CCCB]]
+<https://media.ccc.de/b/erfas>
-  * [[erfa:c4 | CCC Köln]]
-  * [[erfa:muc | CCC München]]
-  * [[https://scratchbook.ch/2019/01/vortragsaufzeichnung-und-videostreaming-im-eigenbau/|CCC Zürich]]
-== Ideas for your own Setup
+## Existing setups in local CCC Erfas
-<block box info round centeralign 90% center :en>
-The following content needs to be updated, please do not use this as a blueprint without talking to us
-</block>
-== Design Goals
+- [ CCCAC](erfa:cccac )
-A hard- and software collection that can be used entirely or in peaces for small to midsize events in hacker-spaces / erfas. \\
+- [ CCCB](erfa:cccb )
-It should be aligned with the best practices worked out in the operation of c3voc but be a more cost efficient solution. \\
+- [ CCCH - Leitstelle511 (WIP)](erfa:c3h )
-It also should be modular that it can be tailored to the needs and budgets of user. \\
+- [ CCC Köln](erfa:c4 )
-In the following we list the main building blocks an make some suggestions what could be used.
+- [ CCC München](erfa:muc )
-*  FullHD Video recording
+- [CCC Zürich](https://scratchbook.ch/2019/01/vortragsaufzeichnung-und-videostreaming-im-eigenbau/)
-  *  live mxing => [[:voctomix]]
+- [ Verschwörhaus Ulm](https://wiki.verschwoerhaus.de/voc )
-  *  Streaming in FullHD  => [[erfavoc#streaming]]
-  *  Slides via "Framegrabber"  => [[erfavoc#framegrabber]]
-  *  At least one Kamera => [[erfavoc#camera]]
-* Capture Audio
-  *  Headset + hand mic
-  *  Audio mixer (optional)
-*  Postprocessing support to publishing on media.ccc.de and optional other platforms
-  *  without fuse recording  => tracker import recording worker
-  * with full tracker stack  => normal tracker chain
-[[ erfavoc-old | alter Seite ]]
+# Ideas for your own Setup
-== Idee
+## Design Goals
-Die Idee ist ein Setup zu zusammen zu stellen welches FullHD Recordings und Streaming ermöglicht.
+A hard- and software collection that can be used entirely or in peaces
-Dabei sollen Komponenten vorgeschlagen werden welche erprobt sind und es ermöglichen Vorträge mit
+for small to midsize events in hacker-spaces / erfas.
-einer guten Qualität von Bild und Ton ermöglicht. Weiter dient dieses Projekt dazu mehr Mitgliedern
+It should be aligned with the best practices worked out in the operation
-den Zugang zu dieser Technologie zu ermöglichen um Forschung zu ermöglichen.
+of c3voc but be a more cost efficient solution.
+We will list here only components we tested / use our self. This doesn't
+mean you can't use other components, its just an blueprint.
+It also should be modular that it can be tailored to the needs and
+budgets of user and already existing components can be integrated.
-Der Vorschlag ist modular aufgebaut und setzt wenn möglich auf Komponenten welche ggf schon im
+In the following we list the main building blocks an make some
-Erfa verfügbar sind.
+suggestions what could be used.
-Da engere zusammenarbeit der Erfas welche Vorträge veranstalten und dem VOC team soll dafür sorgen das vor
+- FullHD Video recording
-allem bei der Nachberarbeitung und dem Veröffentlichen auf bestehende Tools zurück gegeriffen werden kann.
+- live mxing =\> [:voctomix](:voctomix)
+- Streaming in FullHD =\> [erfavoc#streaming](erfavoc#streaming)
+- Slides via "Framegrabber" =\>
+  [erfavoc#framegrabber](erfavoc#framegrabber)
+- At least one Kamera =\> [erfavoc#camera](erfavoc#camera)
+- Capture Audio =\> [erfavoc#audio](erfavoc#audio)
+- Headset + hand mic
+- Audio mixer (optional)
+- Postprocessing support to publishing on media.ccc.de and optional
+  other platforms =\> [erfavoc#publishing](erfavoc#publishing)
+- without fuse recording =\> tracker import recording worker
+- with full tracker stack =\> normal tracker chain
-== Camera
+[ old page (ger) ]( erfavoc-old )
+## Camera
-== Audio
+There are numerous options for cameras depending on your budget. In most
-Ein Headset ist in den meisten fällen für den Speaker am angenehmsten zu tragen da er die Hände frei hat.
+situations we recommend to feed you audio into the camera via XLR. This
-Gerade ungeübte Sprecher haben oft Probleme ein Stabmikrofon konstant gleich zu halten.
+has two main advantages, one it that you audio will be in sync with the
+video all the time, the other is that you have a backup of audio and
+video on the SD card of your cam. Also using SDI to connect the camera
+to your video mixer is a much more stable and reliable solution than
+e.g. HDMI. Therefore the following points should be taken into concern
+when buying a cam.
-Da Publikumsfragen ein wichtiger Teil eines Vortrags sind macht sich darüber hinaus ein Handmikrofon fürs Publikum gut.
+- Audio in (preferable XLR)
+- Video out (preferable SDI)
+- SD card recording (much cheaper than other solutions)
+- A wide-aperture lens (if you don't have a professional light setup)
-An die vorgeschlagen Kamera lassen sich zwei Mikrofone direkt anschließen ein Audiomischer ist daher nicht zwingend notwendig
+In most cases this will lead you to semi- / professional cameras which
-bietet aber durch aus Vorteile und sollte bei nicht zu engem Budget auch angeschafft werden.
+can be expensive. It may be a good option to look for used ones. A
+entrance level cam is the [hardware:hm-200e](hardware:hm-200e) which
+sadly has not the best lens but has a reasonable price. A much better
+lens can be found in many Panasonic cams like
+[hardware:ag-ac-160-eej](hardware:ag-ac-160-eej) which you probably can
+buy second hand.
-== Encoding / Recording / Mischen
+A list of cameras which are also suitable to some extend can be found in
-Dies kann alles in einem PC erfolge wenn genug CPU vorhanden ist.
+our [distributed-conference](distributed-conference) page.
-...
-== Framegrabber
+## Audio
-== Streaming
+In most situations a headset results in the best audio quality,
-VOC CDN can be used by all erfas/frinds just ask us :-) \\
+especially with untrained speakers. As the speaker don't alternates the
-we can either pull a "voc default mkv" from an icecast running at your side or offer an RTMP endpoint.
+distance between mic and mouth this also makes it easier for the audio
-Both ways the stream will end up in our cdn and you can use our [[software:streamingwebsite]] as a frontend. This also also you to embedd the stream in your own webpage.
+mixer operator. In our experience most speakers prefer a headset because
+it keeps there hands free.
+For question from the audience and moderation purposes a hand mic is a
+useful addition to the headset.
+Depending on the budget a audio mixer is a useful addition to the setup.
+Especially if audio from the presenter laptop should be included. If a
+camera without audio input is used, a mixer with build-in sound card can
+be very useful. Our recommendation is to feed the output of the mixer
+(or of the two mic's) into the camera, preferable via XLR).
+If it is in the budget, digital mixers can be a good addition to the
+setups. For references what is used by us have a look at
+[hardware:audiocase](hardware:audiocase).
+## Encoding / Recording / Mixing
+A machine that is capable of running a software video mixer, encode the
+results for recording and streaming and that has capture devices is the
+central point of the setup. In our setup we run voctomix on it, Open
+Broadcast Studio (OBS) is another alternative. We recommend to run Linux
+here but if you into pain windows could work for to with obs.
+## Framegrabber / Capture Cards
+Capture cards can be either PCIe based or USB 2/3 depending on budget
+and use case. We use mostly blackmagic decklink
+[hardware:decklink](hardware:decklink). A (probably not complete) list
+of alternatives can be found here
+[hardware:framegrabber](hardware:framegrabber) . Grabbing the camera
+input is usualy straid forward, capturing slides from speaker notebooks
+can be quite challenging. E.g. Apple Computer tend to believe the
+presentation belongs to Apple so they encrypt the output, also you will
+run into hackers with there hand tailored graphic stack which output
+x42 and you need to somehow scale that. Here are devices that can do
+scalling, or grabber cards that are agnostic regarding the input a good
+option.
+## Streaming
+VOC CDN can be used by all erfas/friends just ask us :-)
+we can either pull a "voc default mkv" from an icecast running at your
+side or offer an RTMP endpoint. Both ways the stream will end up in our
+cdn and you can use our
+[software:streamingwebsite](software:streamingwebsite) as a front-end.
+The preferred way is to just send us an pull request with your
+configuration. This also also you to embed the stream in your own
+webpage.
+## Publishing
+Depending on how much of our stack you use we have different option on
+ingesting you content in our publishing pipeline. The
+[:c3tracker](:c3tracker) can support you from cutting the raw videos to
+publish numerous formats to voctoweb (the software behind
+[:media.ccc.de](:media.ccc.de)) and other platforms like youtube. We can
+ingest ready produced videos with pre and postrole or let the tracker
+add those to the file.
-== Publishing
-Depending on how much of our stack you use we have different option on ingesting you content in our publishing pipeline.
-The [[:c3tracker]] can support you from cutting the raw videos to publish numerous formats to voctoweb (the software behind [[:media.ccc.de]]) and other platforms like youtube.
-We can ingest ready produced videos with pre and postrole or let the tracker add those to the file.