Cast video to Fire TV from a Windows PC
Fire TV sticks, cubes and built-in Fire TV sets can receive supported video from your PC, up to the quality the source and device support, without a receiver app installed on the stick.
Supported videos from your PC can be cast to Fire TV, up to 4K HDR where the source, PC, network and TV support it, with selected subtitles rendered on screen. AIX Player converts unsupported parts while streaming when needed.
Which files can I cast?
File support varies by Fire TV model; AIX sends compatible files directly or converts unsupported parts while streaming.
How does it connect to your Fire TV?
AIX Player pairs with Fire TV directly rather than mirroring your screen, so the television decodes the film itself and the picture stays sharp. A compatible Fire TV can appear by name when it is reachable and discovery succeeds.
What to expect on a Fire TV
- How it plays: AIX Player pairs with the Fire TV directly, with no app to install; the first connection shows a PIN on the TV that you type once.
- Plays directly: H.264, HEVC, MPEG-2, VP8, VP9 and AV1 video, up to 2160p (4K) at 60 frames per second on the models that support it.
- HDR formats: HDR10, HLG, HDR10+ and DV HDR, on the models that support them.
- HDR casting uses AIX Pro or the casting trial: HDR stays HDR on a compatible direct-play route; converted video is SDR.
- Sound: a file the TV plays directly keeps its own soundtrack; every stream AIX Player converts carries AAC sound.
- Subtitles: the subtitle you choose in AIX Player shows on the TV.
- Casting allowance: the free app includes 60 casting minutes in total, once, not per session; AIX Pro makes casting unlimited.
From AIX Player’s device catalogue; AIX uses device information and the selected route to choose direct playback or conversion for your Fire TV. Casting an MKV? Cast an MKV to the TV. Something not working? Fix casting problems.
How do I cast it? Three steps
Jellyfin, Emby and Plex videos play on your PC; casting media-server videos is not supported. Network shares can be browsed freely; SDR playback is unlimited, while HDR uses its trial or AIX Pro. These casting steps are for supported local files. Read about media servers.
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Open the video and set it up how you want it
Open it from your PC’s drive or a USB or SD drive, then pick the audio track and choose the subtitle. The soundtrack and subtitle you choose are the ones the TV gets.
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Press cast and choose your Fire TV
AIX Player scans the network and lists what it finds by name. When one television offers several supported protocols, AIX ranks the available routes; Google Cast has priority when detected.
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Sit down — your PC is the remote
Use the playback controls available for the selected TV and route; some audio or subtitle changes require a new cast. Nothing is mirrored, so you can carry on using the PC.
Devices appear on their own. The first connection to a Fire TV shows a PIN on the television — type it once and AIX Player remembers it. Film behind the cast list: Charge © Blender Foundation / studio.blender.org, CC BY 4.0.
Will my subtitles show on the TV?
AIX delivers supported external subtitles along with the cast video.
AIX Player takes care of it. Choose a subtitle in the player, a track inside the video or a separate file you added, and that subtitle shows on the Fire TV. Some subtitle changes work during playback; tracks that need to be drawn into the video can require a new cast. The subtitles when casting guide has the details.
What if my TV refuses the file?
Fire TV devices support a limited set of media formats, so AIX Player converts unsupported parts while the video streams. Supported Intel, AMD and NVIDIA graphics hardware can accelerate video conversion; on Qualcomm, only H.264 encoding is hardware-assisted, and other stages use the processor.
Fire TV casting questions
Why can I not find my Fire TV Stick?
Wake the Fire TV and check that it is reachable on the same network as the PC. Press a button on its remote to wake it, then reopen the cast list in AIX Player.
Is a Fire TV Stick fast enough for 4K?
4K playback depends on the model, file, PC and connection; check the model’s supported networking options and compare network quality.
Do I need to install an app on the Fire TV?
No. AIX Player pairs with it directly. There is nothing to add from the Amazon store and nothing to sign into on the stick. The first connection shows a short PIN on the television that you type once in AIX Player; after that the stick is remembered.
Why is there picture but no sound on my Fire TV?
Check mute, volume and the selected audio track; a converted stream uses AAC, while a direct file retains its audio.
Casting to something else?
AIX supports several TV families; setup, supported files and available controls depend on the device and route.
Put tonight’s film on the Fire TV.
Install AIX Player, open a supported local video, choose the TV and follow any connection prompts.
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