Paper Presentation Requirements for ICCV 2021

Paper presentations preparation at ICCV'21


All accepted “oral” papers should prepare a 12-minutes video and poster PDF for their presentation.  All accepted “poster” papers should prepare a 5-minutes video and poster PDF for presentation. In addition, all *main conference papers will have a "live Q&A session" where attendees can meet the authors via a video link to discuss the paper and answer questions.  (*Workshop paper authors – please reach out to organizers for their requirements.) See the detailed requirements below.

 You must submit the following by September 30th, 2021:

  • If your paper was accepted as an ORAL, a 12-minutes video presentation of your work.
  • If your paper was accepted as a POSTER, a 5-minutes video presentation of your work.

 For BOTH types of papers, you also need to provide:

  • A one slide PDF “summary slide” serving as the high-level summary of your work (in the 16:9 aspect ratio format. See the slides and poster-PDF instructions below). The minimum font size for the first slide is 8-point. If your paper was accepted as a poster, this second slide can use a smaller font and will serve as your poster-PDF.
  • An abstract with keywords
  • OPTIONAL but advised - A PDF with the slides from your presentation. Most people will be looking at your presentation slide and the second poster-PDF on a typical laptop or computer screen. If your paper was accepted as an oral, you can use the “summary slide” as you see fit, i.e., you can use it during poster sessions, if you wish, but it is not required.

 (1) A 12-minute or 5-minutes video presentation

Authors should prepare either a 12-minutes or a 5-minutes video presentation of their accepted “oral” or “poster” papers, respectively.  Videos will be made available on the conference platform (Cadmium) for viewing at any time during the conference.  Attendees will be able to post questions to the authors asynchronously via a text Q/A box associated with each paper.  Videos should be encoded in an MP4 format, at 1920 x 1080p (HD), using H264 compression.  Please ensure that your associated audio is clear and at the appropriate level. It is highly recommended to use external separate microphone or those within a good quality headset to produce clear quality audio for the web conference. Most microphones that come with laptops/desktops would not produce clear audio. The maximum video file size allowed by the virtual platform is 100 MB, however, we recommend a much smaller file size (e.g., ~ 50 MB) to avoid issues with uploading, downloading, and streaming. 

·               Note that our virtual platform provider has a feature called Warpwire to record your video. This service will automatically generate closed captioning and is a good solution for all recording needs. It is highly recommended to use this option. 

 ·             Should you choose to record your video externally into an MP4 file, make sure to also have slides presentation mode enabled just like you would do a web seminar using zoom, Google Meet, or MS Teams. In this case, make sure to also use external close caption generation (YouTube has auto caption generation if you upload your video to YouTube. See instructions on how to auto generate a caption in YouTube at the end of this guideline in the Closed Captioning Section). 

(2) A poster-PDF

Authors should also prepare a poster PDF for their paper presentation.  The virtual platform has a feature to browse all posters in a paper session.  Posters can also be used as a talking point for the “live” sessions. 

 Detailed Instructions for Posters, Videos, and Closed Captioning


Poster Instructions

If your paper or workshop has posters, a template for poster-PDF can be found here: However, it is optional to use this template. You can use your own poster templates as long as it is in16:9 aspect ratio (48 in x 27 in) format similar to the provided template.

 Slides Deck PDF Instructions

It is optional, but highly encouraged, to upload a PDF of the slides used in your presentation. You should also submit a “summary slide” to the Harvester platform together with your video and poster-PDF. You can use your poster-PDF as the "summary slide”. Otherwise, to the minimum, you should submit a single slide as the “summary slide” with the title of the paper and the authors with clearly visible font sizes.

Video instructions

For video on the virtual platform, as described above, there is a limit of 12-minutes or 5-minutesmaximum for uploaded videos based on your paper acceptance as “oral” or “poster”, respectively.

It is strongly recommended that videos are prepared as MP4 using 1920 x 1080p (HD) in H264 compression. Although other formats may be supported, they are strongly discouraged.  The only constraint for the virtual platform is that the video file must be less than 2 GB, however, we recommend you aim for a smaller size (such as ~ 50 MB) to ensure easy upload and streaming.

All videos should have narration and closed captioning (see instructions below). You may get someone else to do your voice-over. Human narration is preferred but text-to-speech (TTS) is allowed if it makes the video easier to understand. However, make sure of the accuracy of the TTS system before uploading your video. Similarly, please ensure the accuracy of any automatically generated closed captioning to adhere to the reasonable accessibility policy of the conference.

When presenting, please introduce yourself. We recommend any text/math should use at least 24-point font (and ideally should be >32pt) as smaller fonts will not be readable on small mobile screens.

Examples of a 5-minute video

If this is your first ICCV paper and you need ideas on how to present your work, here are some nice examples on YouTube from CVPR 2020. 

 Video/Slide Presentation Formatting

Most videos will be recordings of slide presentations (e.g., PPT).   If you prepare your presentation using PowerPoint, you can time your slides and save the presentation as a WMV video directly from PowerPoint. Some instructions on how to do this can be found here: 

The Cadmium Harvester site you were invited to has a feature to record your video using Warpwire. Unless you have specific reasons to record outside of the platform, it is strongly recommended to use the platform for your video recording. In addition to the video and slide combined recording, the Harvester platform also gives you the ability to generate and edit closed captions. 

Your WMV from your presentation can be converted into MP4 YouTube or FFMPEG.

Alternatively, there are many free screen capture programs that directly produce proper MP4:

  • VLC- (, which works on all platforms.
  • OBS-
  • Tinytake- ( for Windows.
  • For Mac there is the built-in QuickTime, which will need to be exported as MP4 because the QuickTime default is MOV).
  • For Mac users using keynote for your presentation slides.
    • You can do Play > Record Slideshow…, then record it. This seems to just record timestamps. But then you do File > Export to Movie, select “Slideshow Recording”, Custom resolution (1920×1080).

Closed Captioning Instructions

As described above, it is strongly recommended to use the Cadmium Harvester platform provided task, Warpwire, to record your videos in order to utilize the different features such as direct presentation with your slides and closed caption generation. To generate caption using the Warpwire caption generation tool integrated in cadmium, please follow: If you would like to edit your generated captions, please follow:

Should you prefer to record your video outside, please use an external closed captioning service such as the YouTube auto caption generator. If you choose this option, first upload your video to YouTube and then use this step-by-step instruction ( to generate your captions. Once you are satisfied with the caption, download the video into MP4 format and upload it to the Harvester site.

Other closed captioning generation tools, which we don’t encourage but you can use at your own risk, may include: Rev, MixCord, Amara, Zubtitle.

 If you choose to use these outside captioning tools or YouTube’s auto captioning, you can either embed the captions into the videos (strongly preferred) or submit a separate .srt caption file together with your video under a separate task via the Cadmium Harvester platform.

Final Notes on Cadmium Harvester Platform Invitation

The primary author will receive an invitation to complete these tasks from our virtual site, Cadmium.  If you do not receive this invitation by September 14th, please check your Junk Folder.  If the primary author still has not received the invite, please reach out to Nicole (Nicole AT ctocevents DOT com)