🐛App crashes with "Null check operator used on a null value" for Hi10P media

[Spec-DY]

Description

The app crashes immediately when attempting to play H.264 10-bit (Hi10P) media files.

Reproduction steps

1. Play any video encoded in H.264 High 10 Profile (Hi10P).
2. Either crash occurs immediately (Null check operator used on a null value) or it won't play the video.

Screenshots

No response

Logs

[SEVERE  |  Flutter error: Null check operator used on a null value, 2026-01-12T19:03:24.601385

#0      State.context (package:flutter/src/widgets/framework.dart:959)
#1      _CurrentlyPlayingBarState.openFullScreenPlayer (package:fladder/widgets/navigation_scaffold/components/floating_player_bar.dart:51)
<asynchronous suspension>
]

Platform

Windows

App Version

0.8.1

Jellyfin server

10.11.2 on Linux

[HachiHalation]

I also had this problem yesterday funnily enough, and I think its actually an issue with media kit: media-kit/media-kit#1366. Building a version that set hwdec to none or nvdec (I have an NVIDIA 50 series card) in the VideoControllerConfiguration for the mpv player seems to workaround the issue.

[0Arbor0]

I haven’t tested this more deeply yet, but I ran into the same issue with this file and several other H.264 10-bit (Hi10P) files.

I’m running the same setup, including an NVIDIA 50-series GPU, and the behavior matches what’s described here:

Playback fails on Fladder Desktop

The same files play correctly in mpv CLI and Jellyfin Media Player

Fladder on Android also works as expected

Based on limited testing so far, the issue seems specific to Hi10P content on desktop, rather than the media files or server configuration. I haven’t tested extensively beyond this yet, but it’s been reproducible in my setup.

Sharing this in case it helps confirm the scope of the issue.