When uploading video content to the EventHub platform, factors like network connection and file size affect the upload process. This article includes troubleshooting tips for uploading simulive video streaming content.
1. File Requirements
Reference the following table for file type and size requirements.
| File Type | mp4, avi, mov, wmv |
| Size | up to 20GB |
| Recommended Aspect Ratio | 16:9 |
| Recommended Resolution | 1920×1080 |
2. Factors Affecting Video File Size
Frame Rate
Frame rate refers to how many individual images, or frames, make up one second of a video. Frame rate is measured in "frames per second" (fps).
Videos with higher fps appear smoother but result in larger file sizes, whereas videos with lower fps may appear choppier but have smaller file sizes. 30fps is a generally accepted standard for videos, but for video content that does not have a lot of movement, reducing it to 20fps may have minimal impact on the quality while still reducing file size.
Bitrate
A video's bitrate (bps) refers to how much data is transferred in one second, combining both the video and audio components. A higher video bitrate results in a clearer, smoother picture at the cost of a larger file size. Depending on a viewer's network, they may be unable to smoothly view videos with a high bitrate.
The following table provides a general outline of recommended video bitrates for an mp4 file at 24fps.
| Resolution | Video With Little Movement | Video With Lots of Movement |
| 480p (SD) | 0.94〜1.13 Mbps | 2 Mbps |
| 720p (HD) | 2〜2.4 Mbps | 5 Mbps |
| 1080p (Full HD) | 4.5〜5.4 Mbps | 8 Mbps |
| 2160p (4K) | 35～45 Mbps | 53～68 Mbps |
An audio bitrate of 128-160 Kbps is generally sufficient for most video content. If audio quality is less important for your content, you can reduce the audio bitrate to 64 Kbps to accommodate a higher video bitrate and help manage overall file size.
Resolution
Resolution refers to the number of pixels presented horizontally and vertically in a video and determines the clarity of the picture. You may see resolution indicated using phrasing like 1920×1080, 1080p, or HD. The higher the resolution, the more pixels are used to generate a video's images, thus resulting in a clearer picture and larger file size. We recommend a resolution of 1080p, but for videos where most of the content is presentations or materials, 720p may be sufficient. The following table outlines standard resolutions and their dimensions.
| Resolution | Dimensions |
| 360p | 640×360 |
| 480p (SD) | 720×480 |
| 720 (HD) | 1280×720 |
| 1080p (Full HD) | 1920×1080 |
| 2160p (4K) | 3840×2160 |
A viewer's network affects their video resolution. Even if you upload a video with a high resolution, if a viewer's network is unstable, they will only be able to watch the video in a lower resolution.
3. Tips for Uploading
- The larger the video, the longer it will take to upload and complete the encoding process. To speed up this process, try reducing the file size by adjusting parameters like the frame rate, bitrate, or resolution. If you cannot compromise on video quality to reduce the file size, try splitting the file into multiple parts. For example, split the content between sessions and upload the videos separately.
- An unstable or slow internet connection will affect video upload time. Videos should upload within three hours, but if the progress is especially slow after one hour, try connecting to a different network and attempting the upload again.
- An upload will fail under any of the following circumstances:
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- The internet connection is disrupted
- The uploading computer enters sleep mode
- The upload popup window is closed
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- When multiple admins log in simultaneously to the event management page, if one admin uploads a simulive video, the others will see the following error message for the uploaded video. The upload is progressing, so other admins should only attempt additional video uploads once the current upload is complete.