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VideoLAN Dev Days conferences
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Welcome to Video Dev Days 2019

The VideoLAN non-profit organization is happy to invite you to the multimedia open-source event of the fall!

For its eleventh edition, people from the VideoLAN and open source multimedia communities will meet in Tokyo to discuss and work on the future of the open-source multimedia community.

This is a very technical conference, focused on low-level multimedia.

Who can come?

Literally every one is invited to VDD, we just need registration for legal reason (to enter the building).

This is a technical conference, focused on low-level multimedia, like codecs and their implementations like x264 or dav1d, frameworks like FFmpeg or Gstreamer or playback libraries like libVLC.

Things like Javascript video frameworks or ad-injection frameworks would be considered out of scope.

The price to enter is totally Free.

Sponsorship for Japan

Since Japan is a bit further than the usual conferences, often in Europe, going to Japan is more expensive.

If you want VideoLAN to sponsor your trip, you should read the Sponsorship Policy.

Traveling to Japan

You should consider staying a bit longer to Japan, if you can afford a few extra days. Kyoto is amazing!

You should take care of your passport and, if applicable, your visa very quickly!

See the dedicated page: traveling advice for Japan.

You might want to consider to offset your carbon footprint.
For example: MyClimate CO2 Calculator or CarboonFootPrint.com


Friday November 8th

Community bonding day!

Da Tokyo game


Meeting tbd

Address : tbd

Evening drinks

19:30 Evening drinks at the...

Sponsored by Mozilla.

(NB: food is not provided there)

Saturday November 9th


Time Auditorium
08:30 - 09:00 Registration & Breakfast
09:00 - 09:25 Welcome words by Jean-Baptiste Kempf, VideoLAN
11:50 - 12:15 VLC 4.0 by Jean-Baptiste Kempf, VideoLAN
12:30 - 14:00 Lunch break! by the Lunch committee

Goodies distribution will start at 14:00

14:00 - 18:00 Meetups
19:30 - ??:?? Community Dinner by the Dinner committee

VideoLAN community dinner

To be defined

Sunday November 10

Time Description
09:00 - 09:30 Breakfast
09:30 - 12:00 Lightning talks

12:00 - 14:00 Lunch by the Lunch Committee
14:00 - 18:00 Unconferences
20:00 - ??:?? Unofficial Dinner by the Unofficial Dinner Committee

Unconference schedule

Time Description
06:30 - 07:00 Beyond Breakfast Coffee by VideoLAN

Practical information

  • The official JNTO site has a wealth of practical information targeting first-time visitors.
  • The air travel page provides more info for arrival and departure.

Location / main venue

The meeting is happening at the IIJ HQ:

In English In Japanese
Internet Initiative Japan Inc.

Iidabashi Grand Bloom
2-10-2 Fujimi, Chiyoda-ku
Tokyo 102-0071


〒102-0071 東京都千代田区富士見2-10-2

The venue is within walking distance of Iidabashi station served by the JR East Chuo-Sobu (JB16) train line, the Tokyo Metro Tozai (T06), Yurakucho (Y13) and Namboku (N10) lines, and the Toei Odeo (E06) metro line. From the sponsored attendees' hotel:

  • Tokyo metro Tozai line west-bound from Kayabachō station (T11) to Iidabashi (T06).

Accommodation / Hotel

If you are sponsored by the VideoLAN association, your hotel is:

In English In Japanese
Hotel Villa Fontaine Tokyo Nihombashi Hakozaki

20-10 Hakozaki-cho Nihombashi
Chuo-ku Tokyo, 103-0015


〒103-0015 東京都中央区日本橋箱崎町20−10


Elsewise, please make your own arrangements for accommodation.

Beware that there are plenty of Villa Fontaine hotels in the area. Be sure to head to the Hakozaki one.

Public transit

Origin Recommended route
Conference venue Tokyo metro Tozai line east-bound to Kayabachō station (T11).
Sengakuji station
Haneda airport via the Keikyu railway
Toei metro Asakusa line north-bound to Ningyōchō station (A14)
Ueno station
Narita airport via the Keisei electric railway
Tokyo metro Hibiya line south-bound to Ningyōchō station (H13).
T-CAT bus terminal
Airport coaches
Short walk.
Keisei bus Yaesu
Narita airport by bus
1,7 km walk from the North exit.

The Suitengu-mae station (Z10) on the Tokyo metro Hanzōmon line is also close-by.


Be sure to get a Japanese electronic payment card to travel easily on the public transports.

NOTE: VideoLAN does not refund taxi, car rental and public transport.

If you have a voucher, you should save your JR Pass for before or after the conference days, as it is of limited use within central Tokyo. You can use it to freely ride on the Yamanote loop and the Chuo-Sobu east-west transverse train lines, as well as JR-operated buses, but it is not valid on the metro networks.

Means of payment

VISA and MasterCard cards are not universally accepted in Japan.


You will need to withdraw cash from an international ATM. You can find those:

  • at arrivals in the airport terminal,
  • in 7-11 convenience stores throughout Tokyo and other cities,
  • and during office hours in Japanese Post offices.

Do not bother with to local banks ATMs, most of which do not accept overseas cards. To be on the safe side, you could exchange a few tens of thousands of yens in advance. Compare prices and avoid the extortionate bureaux de change at airports!

Electronic payments

For small day-to-day purchases, you should procure a FeliCa electronic payment card, a.k.a. an IC card. It can be used to enter and exit public transports (train, metro, bus, etc), to check out at convenience stores and many shops. You can load the card with Japanese bank notes at dedicated machines. There are two options in Tokyo area:

Vendor Regular card Tourist card Tourist point of sale
JR East Suica
¥500 deposit
Welcome Suica
JR East Travel Service Center
Tokyo Metro Pasmo
¥500 deposit
Pasmo passport
  • Keisei at Narita airport
  • Keikyu at Haneda airport

Tourist cards with their cutesy design are meant to keep as memento and provide third-party discounts. But beware that they expire after 28 days (including any unused credit).


Japan has the lowest household voltage in the world, so check the specifications on your power adapters. Outlets are not compatible with European or Commonwealth plugs, so most attendees will need passive adapters. They are easier to find at home, so BUY BEFORE DEPARTURE.

Voltage 100 V
Frequency 50 Hz (60 Hz in Kyoto/Osaka)
Socket Type A


Please bring your own internet.

Mobile data

You can buy, or better yet pre-order, a prepaid data SIM card at international arrival at the airport. Don't postpone, as it might be difficult to find elsewhere.

Wireless LAN

Free Wi-Fi is common but may need registration - in Japanese. There is a map of known Wi-Fi access points in the JNTO app (see #Transportation).

Group Chat

Participants can share information and discuss using the dedicated VDD 2019 Telegram Group.


119 is the fire and ambulance emergency number in Japan. 110 is the local police number.

Please carry your travel insurance card or certificate on you at all times. If you do not have a travel insurance yet, buy a fixed-term one before you depart. EU social security cards are not not valid in Japan. Advise your relatives, and if applicable, your government:

Personal safety risks in Japan primarily stem from natural disasters:

  • JNTO safety tips
  • In case of earthquake:
    • Seek cover (e.g. under a table) if indoors,
    • Get away from structures (especially glass windows) if outdoors.
    • After the quake, get away from the shore onto high ground away from tidal waves.
  • In case of typhoon, follow instructions from authorities. Typhoon are predicted several days ahead.


The VideoLAN Dev Days are organized by the board members of the VideoLAN non-profit organization:

  • Jean-Baptiste Kempf,
  • Denis Charmet,
  • Konstantin Pavlov, and
  • Hugo Beauzée-Luyssen.

You can reach us here.