Can't reproduce video from modal video player (possible ultrawide issue)

[elbisbe]

Describe the bug
When I try to reproduce a video made with the Steam Game Recording feature (it allows you to get clips from the games you have played, akin to Shadowplay), it shows the message "The media could not be loaded, either because the server or network failed or because the format is not supported." It exports as a standard .mp4.

The video is on 21:9 and i think is the culprit of this problem.

An interesting detail is that it works on my phone! (iPhone 16 Pro, using App Store's Chrome) But only the first 30 seconds? Pretty weird.

To Reproduce
Steps to reproduce the behavior:

1. Make a clip using the Steam Game Recording feature on ultrawide format
2. Upload it to Fireshare
3. Try to watch the video
4. See error

Expected behavior
The video should be showing properly.
Screenshots

Desktop (please complete the following information):

• Browser: Chromium Version 145.0.7632.76 (Official Build) (64-bit)
• PC: Windows 11 Pro 25H2

Additional context
The clips are in ultrawide format (21:9). I've tried to upload a clip of another game I play windowed (16:9) and it works fine! So maybe the resolution format is the culprit? I can provide you samples of clips if you need them.

[ShaneIsrael]

What is your steam video recording settings set to? What encoding are you recording the videos in? Does this work with any other videos that you can try?

[ShaneIsrael]

I would also ask, are your volume mounts being mounted over a networked drive?

[elbisbe]

This are the settings I currently have:

• Quality: High (is the default)
• GPU hardware encoding enabled
• HEVC video codec (h265) codec enabled
• Frame rate: 60
• Max video height: no limit (width set automatically to preserve game's aspect ratio)

I'm using fireshare over Docker on my NAS, and the files are locally available in a RAID setup.

I've extracted metadata from both a working video (a Steam Recording of Arc Raiders in 21:9 that I uploaded to YouTube) and the video I'm having problems with.

metadata_working_video.txt

metadata_bad_video.txt

[ShaneIsrael]

21:9 isn't the issue. If you check my demo site almost all the video I upload are 21:9.

More than likely its that your videos are mounted over a NAS which there isn't anything I can do as it is generally an issue with the connection, speeds, or a plethora of other things related to how your NAS is setup. Other than recommend try moving the file in question off the NAS and into a volume on the same system Fireshare is running and then try.

The other potential issue is that its H265 which is generally supported by most browsers today but not all browsers. Might be why it partially works on your phone browser but not desktop. What you can try is changing your steam recording setting to H264 and see if that resolves the issue.