Frequently Asked Questions

The TIB AV-Portal

What is the TIB AV-Portal?

The TIB AV-Portal is a portal for scientific videos with a focus on technology/engineering as well as architecture, chemistry, computer science, mathematics and physics. Other scientific disciplines are also included in the AV-Portal. The videos include among others computer visualisations, learning material, simulations, experiments, interviews, video abstracts, lecture and conference recordings, and (open) audiovisual learning and teaching materials. The portal uses various automatic video analyses. The added value: these video analyses enable pinpoint searches within the video content.

The Lab Non-Textual Materials at the German National Library of Science and Technology (TIB) started developing the portal in cooperation with the Hasso Plattner Institute for Software Systems Engineering in July 2011. In spring 2014, the TIB AV-Portal went online and has since been operated by yovisto GmbH and expanded on behalf of and in close cooperation with TIB. At the beginning of 2020, the portal was completely migrated to TIB. The portal is operated at TIB and continuously developed by a separate team. The team uses agile software development methods according to Scrum.

With the TIB AV-Portal you can easily search, cite and publish scientific videos. Many videos can also be downloaded, licensed or ordered on DVD. On the basis of free licensing (Creative Commons), many videos can be re-used.

The services of the TIB AV-Portal are:

  • hosting & long-term archiving of videos
  • automatic metadata enrichment
  • permanent citation with Digital Object Identifier (DOI)
  • linking between video, scientific papers, research data, NameIDs
  • semantic search
  • legally compliant publishing practices

Get to know the TIB AV-Portal in 120 seconds!

Which types of automated video analysis does the TIB AV-Portal use?

Scene detectionshot boundary detection segments the video based on cuts. A visual table of contents generated from this gives a quick overview of the video content and offers a targeted access. The scenes can be cited to the second via Media Fragment Identifier.

Text recognitionvideo optical character recognition captures and indexes written language (e.g. text on slides), and makes it searchable.

Speech recognitionautomatic speech recognition notes down spoken language in the video in the form of a transcript, which is searchable.

Image recognitionvisual concept detection indexes the moving image with visual concepts such as "computer animation" or "experiment".

Indexingnamed-entity linking describes the individual video segments with semantically associated terms. Synonyms and related terms of entered search terms are searched for automatically, increasing the number of hits.

Which videos are analysed?

In principle, automatic analysis is only performed for videos that are available as video files and belong to the six core subjects of the German National Library of Science and Technology (TIB): technology/engineering, architecture, chemistry, computer science, mathematics, and physics. So far, a vocabulary for automatic annotation is only available for these subjects. 

In addition, video analysis must be legally permissible.

Which languages does the TIB AV-Portal support?

The TIB AV-Portal offers a German and an English view of the user interface, which can be selected via the language selection.

Numerous descriptions of the videos are available in German and English. Hence both German and English search terms can be entered in the search field. When entering a German search term, English translations of the term are automatically included in the search; the same applies vice versa to English search terms.


Upload Videos

How do I benefit from providing the TIB AV-Portal with material?

The TIB AV-Portal increases the visibility of your AV media. Your videos can be found easily, are citable with a time-based citation link and will be available long-term for education and science. The targeted and bilingual (English and German) search - also in the spoken and written content of your video - enables an optimal searchability.

The videos you make available will be:

  • listed in national and international portals such as the German Digital Library and the Europeana, increasing their visibility
  • found easily and quickly by search engines
  • provided with a digital object identifier, making them uniquely referencable and citable
  • professionally evaluated for quality
  • published in a legally compliant manner
  • permanently stored (long-term archived)
  • indexed according to international standards down to the segment level
  • linked to other research information or accompanying material
  • transcribed (speech transcription)
What is collected in the TIB AV-Portal?

The TIB AV-Portal mainly collects (German and English) AV media from science and teaching in the core subjects of the German National Library of Science and Technology (TIB):

  • technology/engineering
  • architecture
  • chemistry
  • computer science
  • mathematics
  • physics

In these fields, the TIB AV-Portal focuses on the following materials:

  • recordings of conference presentations, conferences, colloquia, panel discussions, and other scientific lectures, talks, and discussions
  • recordings of experiments from the area of research and development, presentation of technologies and practices of outstanding scientific importance
  • microscopic images, images taken using special cameras (e.g. thermal cameras) and other imaging techniques
  • documentation and presentation of research work and results
  • modelling, simulations and presentations of special software for certain scientific purposes
  • presentations of 3D models (e.g. architectural models) on film
  • video abstracts

Materials collected in selection:

  • recordings of university seminars and lectures
  • e-learning materials such as online tutorials, massive open online courses (MOOCs), teaching experiments and experiments for private study
  • scientific video items/video blogs on websites
  • presentations of scientific organisations, self-portrayals (film clips and slide shows) of research institutions and companies, mainly with a scientific content
  • documentaries, reports and portraits on film (for example, of architects and their buildings)

Advertising films, image films or popular science films are not included in the TIB AV-Portal.

Who is permitted to provide material?

All users registered in the TIB AV-Portal can provide materials that are of scientific relevance and fall within the TIB collection profile.

Register for the TIB AV-Portal free of charge.

How do I go about posting videos and accompanying material in the TIB AV-Portal?
Step 1: Make your videos available to us
  • via data carrier to:

    Lab Nicht-Textuelle Materialien
    Technische Informationsbibliothek (TIB)
    Welfengarten 1 B
    30167 Hannover, Germany

  • in the case of large data transmissions, via an FTP server (to obtain the FTP access data, please contact
  • single films via the upload form of the TIB AV-Portal
  • via list of links:
    • Your videos are already available for download on a web server on the internet? In that case, you can send us a list of links in a text file (1 download link per line). We will download the videos directly from your server. Please note that we only process direct download links; one click hosters or streaming links will not be accepted.
    • As an alternative to a simple list of links, we also accept a shell script with wget commands for each download link.

Accompanying materials such as lecture notes or scientific papers can also be uploaded. Please make sure that the file names are clearly assigned to the respective video.

Step 2: Send us metadata

The more metadata (title, author, publisher, etc.) you provide for each video, the better the video can be found in the portal. We have prepared an XML file for the metadata, which you can complete and send to us.

Please make sure that the XML files are clearly assigned to the respective videos. Further information can be found in the metadata documentation.

Step 3: Conclude a license agreement with us

By concluding a license agreement, you specify the terms of use and grant us permission to offer your AV media via the portal.

If you do not own the necessary rights: please first contact the authors or other rights holders of the films before making the AV media available to the TIB.

If you are the creator of the AV media or have obtained the rights by transfer: you can choose between an open access licence and a declaration of consent, enabling you to decide how you want to make the material available to the TIB.

Open access licence

With an open access licence, you grant users as many rights as possible to the extent provided by law, and permit the diverse use of your film, fostering scientific exchange in the digital environment. We recommend the licence “CC-Namensnennung – Deutschland 3.0”. This licence ensures that the originator is acknowledged and permits the comprehensive use of AV media in research and teaching.

Please use the open access licence form and return it to us by post once you have completed and signed it.

TIB is granted a simple right of use of the AV media and may make them available via its portals. Users may view the film online or download it. However – in contrast to all CC licences – users may not forward it to third parties or make it available online themselves.

Please use the license agreement form and return it to us by post, completed and signed.

Technische Informationsbibliothek (TIB)
Abteilung Bestandsentwicklung und Metadaten
Lars Gottschalk or Tolga Karaarslan
Welfengarten 1B
30167 Hannover, Germany

If the specified types of licensing do not suffice, we will try to find an individual licensing solution for you. In this case, please contact us.

Assistance in the provision of your materials

We will be happy to provide support in the provision of your materials. Please call us or send us an email:

Lars Gottschalk
Tel.: +49 511 762-14224

Tolga Karaarslan
Tel.: +49 511 762-14227

Which video formats can be uploaded?

We accept almost all video formats. We recommend the following basic settings:

  • File format: MP4 or MOV
  • Codec: H.264
  • Aspect ratio: native image format without letterboxing (4:3, 16:9)
  • Resolution: SD (576) or HD (720, 1080)
  • Frames per second (FPS): 25

Find and Use

How can I search the TIB AV-Portal?

When using the search box, a term search is not only performed within the metadata of the video, such as the title, author or abstract, but also within the spoken text, text overlays and images.

A visual table of contents below the player provides an overview of the video content. The segments highlighted in red contain your search terms. Click on one of the segments to navigate directly to the desired position in the video.

Search in German and English

You can enter German and English search terms.

Synonyms, related terms, and English or German translations that are semantically linked to the search terms you entered will also be searched for automatically. This increases the number of relevant hits. If you search for the German term PKW, for example, you will also receive hits for the German synonym Auto and the English translation car.

Search operators

You can use operators when searching in the AV-portal.

Place a plus sign in front of a search term to search for hits that necessarily contain this term. The minus sign in front of the search term indicates that this term must not be contained in the hit. For example, if you type +linux and -Hanover in the search box, you will get hits that contain linux but not Hanover.

If you search for videos that contain linux or Hanover, place the operator "OR" between the individual search terms. For example: linux OR Hanover.

If you want to search for an exact phrase, enclose the terms that belong together in quotation marks. For example: "information retrieval".


Please pay attention to the correct spelling of the search terms. Search terms with typos or misspelling will not be found. The upper or lower case of the search terms makes no difference.

Searching the TIB-Portal

Every time a search is performed in the TIB AV-Portal, an additional search is triggered in the TIB-Portal, the portal for science and technology of the German National Library of Science and Technology (TIB). Hits in the TIB-Portal are displayed below the results list of the TIB AV-Portal. Simply click on the hits displayed in the box to switch to the TIB-Portal.

How to register to the TIB AV-Portal?
Note for TIB-Portal customers

If you are already registered to the TIB-Portal, you can log in to the TIB AV-Portal using your TIB customer number and password. In this case, you do not need to register additionally to the TIB AV-Portal.

How to register to the TIB AV-Portal
  1. Call up the registration form.
  2. Fill in the fields. All fields marked with an asterisk (*) are mandatory.
  3. Click on “Register”.

After you have submitted the registration request, the portal will display the message that you have successfully registered. In addition, we will send you a confirmation email to your address.

If you have any problems registering, please contact the TIB customer service:

TIB customer service
+49 511 762-8989

Can I use the TIB AV-Portal free of charge?

With a few exceptions, the use of the portal, its services and content is free of charge. As soon as a service is subject to a charge – for example, when ordering DVDs or licensing AV media – you will be expressly informed.

Is the content freely accessible?

All contents of the TIB AV-Portal itself are free of charge and are usually accessible without having to register to the TIB AV-Portal. Whether a specific film may be viewed, downloaded and distributed online or whether the information about the film only contains a link to an external website depends on the conditions under which the licensor has made the film available to TIB.

A separate licence agreement must be concluded for the acquisition of television licences and licences for public screenings.

How can I download videos and accompanying material?

In the drop-down list “Download video” below the video player you will find various formats in which you can download the video. However, this option is only available if there are no legal restrictions on the download.

Some videos have accompanying material such as lecture recordings or journal articles. Accompanying material can be found in the metadata section (below the video player) and can also be downloaded.

Can I purchase audiovisual media?

The IWF media shown online in the TIB AV-Portal can also be purchased on DVD. In addition, many other IWF films that are not available online – especially from the fields of ethnology and medicine – can also be purchased on DVD. Some medical films are subject to a use restriction for members of the medical profession only (can only be sold upon presentation of a confirmation of use).

You will find the “Purchasing a DVD” option below the video player. The prices quoted in the price list for DVD orders apply.

Do you require assistance in ordering a DVD or searching for a IWF film? Then give us a call or send us an email:

Paul Feindt
Tel.: +49 511 762-14221

Can I license audiovisual media?

For the IWF media shown online in the TIB AV-Portal, sublicenses for the use of excerpts in film and television or for the public screening of entire films can also be acquired.

You will find the “Granting licences” option below the video player. After receiving the licence request, TIB checks whether the requested medium can be licensed for the desired purpose. The prices quoted in the licensing price list apply.

Do you need assistance in sublicensing IWF media? Then please call one of our contact persons or send us an email.

Contact person for sublicensing excerpts for film and television:
Elke Brehm / Tel.: +49 511 762-8138

Contact person for sublicensing films for public screening:
Thomas Werner / Tel.: +49 511 762-14222

How can I view films that are unavailable online at present?

Some IWF films are not available online for technical or legal reasons. On request, most of these films can be viewed on site at the TIB. The analogue IWF film heritage is also accessible again: a four-plate editing table for 16 mm and 35 mm film copies is available to enable users to view films for research purposes.

Would you like to make a request? Then give us a call or send us an email:

Paul Feindt
Tel.: +49 511 762-14221

Place where digital films can be viewed
Technische Informationsbibliothek (TIB)
Lab Nicht-Textuelle Materialien
Lange Laube 32
30159 Hannover, Germany

Place where analogue films can be viewed
Technische Informationsbibliothek (TIB)
Haus 2 - Außenmagazin
Bremer Straße 2
30880 Laatzen/Rethen, Germany

Which film stocks have special terms of use?

The AV-Portal contains certain films, in particular historical films or film collections, which are not freely accessible for licensing or privacy reasons. These are subject to specific terms of use. These include:

Ethnological films for research from the IWF collection

With the acquisition of the IWF film heritage (formerly IWF Wissen und Medien gGmbH), TIB also took over the valuable ethnological film collection of IWF Göttingen.

As part of the DELFT project, these films were digitized to a high standard.

Most of the footage was not intended for the public, but specifically for ethnological research. In this sense, these film documents are - as far as legally possible - continuously made available in the TIB AV-Portal. Individual activation is required to use the collection.

For download: Flyer with further information incl. form "Declaration on the scientific use of ethnological films provided by the German National Library of Science and Technology (TIB)".

How can I cite videos from the TIB AV-Portal?

Below the video player, you will find the link "Cite video". By clicking on this link you can download the metadata of the video such as title, author or year of publication in the formats BibTeX, RIS, or text.

If you have installed a literature management program such as Zotero or Citavi, you can load the embedded metadata directly into that program via plugin. This works on the detail view of a single video as well as on the result page.

In the TIB AV-Portal, you also have the possibility to cite individual segments of the video. You will find the citation link of the segment immediately below the video player.

How do I use the watchlist?

You will find a star in the upper right corner of each video image.

Click on the star to save the video in a watch list. The star is filled in red for watched videos.

You can find the lists you have created by clicking on "watchlist" at the top of the metanavigation. You can change the order of the videos by drag & drop and share your watch list with other people.

In order to use the watchlist functionality, you need to be registered in the TIB AV-Portal (registration form).


Download Open Data

Where can I download the metadata of the TIB AV-Portal in RDF?

The German National Library of Science and Technology (TIB) aims to promote the use and dissemination of its collections. In this context, TIB publishes metadata of videos of the TIB AV-Portal as Linked Open Data.

Please note that some of the data was generated automatically and may contain errors or be incomplete.

You will find the data sets on the download page of the TIB AV-Portal.

Where do I download the metadata of the TIB AV-Portal via an OAI interface?

Metadata in the formats OAI Dublin Core, MARC XML, and RDF XML can be downloaded via TIB’s OAI interface - there may be daily updates.


Conference Recordings

Can I have my conference or scientific event recorded by TIB?

The German National Library of Science and Technology (TIB) offers a professional recording service for conferences and scientific events - whether they take place physically, virtually or even hybrid. The TIB Conference Recording Service (TIB Conrec) offers conference organisers from science and industry a comprehensive package - from recording to live streaming and publication on the TIB AV-Portal.

Further information can be found at TIB Conrec. Please feel free to contact us directly at

Will the videos be published on the TIB AV-Portal?

All videos recorded by TIB Conrec can be published free of charge on the TIB AV-Portal with all associated services. You and all actively involved persons decide whether and under which license conditions the videos will be published.

Can I also publish the videos on the conference website or other video portals?

You and all actively involved persons determine where and under which license conditions the videos are published. Videos from our AV-Portal can be integrated into your website via embedded player.

What does the conference recording service cost?

For a one-day event in one room you can expect about 1000€ plus VAT and travel expenses. For each further room or day additional costs of approx. 400-600€ arise. These values are only approximate values and may vary depending on the scope of the offer (staff and equipment).

Get in touch with us! We will prepare an individual offer - according to your specifications and wishes.

Mail to: