Castie works great on many Android devices including Galaxy tablets and phones, the Google Pixels, or Sony, Motorola and LG phones. In all, Castie supports over 15,000 Android devices alone and tens of thousands of other devices.

Below are the formats supported by Castie on Castie for Amazon FireTV

For other versions of Castie please see Supported Formats on Castie.

Video Formats supported by Castie on FireTV
Format	MIME Type	Description
avc	video/avc	Audio-Video-Codec
hevc	video/hevc	ISO/IEC 23008-2, H.265, HEVC
hevc_b	video/hevc	ISO/IEC 23008-2 Annex-B, H.265, HEVC
mkv	video/matroska	Matroska Video Container (with supported codecs)
mpeg1	video/mpeg	ISO/IEC 11172-2, MPEG-1 part 2, H.261
mpeg2	video/mp2t	ISO/IEC 13818-2, MPEG-2 part 2, H.262
mpeg4_2	video/3gpp	ISO/IEC 14496-2, MPEG-4 part 2, H.263 (Fire TV Gen 3, Cube, TV's)
mpeg4_10b	video/avc	ISO/IEC 14496-10, MPEG-4 part 10 Annex-B, H.264, vc-1
mpeg4_15	video/avc	ISO/IEC 14496-15, MPEG-4 part 15
vp8	video/webm	VP8 codec (Fire TV Toshiba and Insignia only)
vp9	video/webm	VP9 codec (Fire TV Gen 3, Cube, TV's)

Audio Formats supported by Castie on FireTV
Format	MIME Type	Description
aac	audio/aac	ISO/IEC 14496-3, Advanced Audio Coding
aac_adif	audio/mp4a-adif	ISO/IEC 14496-3, Advanced Audio Coding, ADIF container
aac_adts	audio/mp4a-adts	ISO/IEC 14496-3, Advanced Audio Coding, ADTS container
aac_latm	audio/mp4a-latm	ISO/IEC 14496-3, Advanced Audio Coding, LATM container
ac3	audio/ac3	Dolby Digital
alac	audio/alac	Apple Lossless
amr-nb	audio/amr-web
amr-wb	audio/3gpp
eac3	audio/eac3	Dolby Digital Plus
flac	audio/flac	Free Lossless Audio Codec
mp2	audio/mp2	ISO/IEC 11172-3, MPEG Audio Layer II
mp3	audio/mpeg	ISO/IEC 11172-3, MPEG Audio Layer III
pcm	audio/pcm	linear PCM
vorbis	audio/vorbis	Ogg Vorbis

Livestream formats supported by Castie on FireTV
Format	MIME Type	Description
m3u8	video/x-mpegURL	HTTP Livestreaming - yes, (HLS, limited to above codecs)
HLS Support is limited, but Amazon is adding more

Image Formats supported by Castie on FireTV
Format	MIME Type	Description
bmp	image/bitmap	Device Independent Bitmap (DIB)
gif	image/gif	Graphics Interchange Format
jpeg	image/jpeg	Joint Photographic Experts Group
png	image/png	Portable Network Graphics

Subtitle formats supported by Castie on FireTV
Format	Description
hardcoded	hardcoded as part of video, yes
embedded mp4/mkv	embedded inside mp4/mkv
vtt	External vtt files - WebVTT

Formats NOT supported by Castie on FireTV
Format	Description
DRM	Digital-Rights-Management - Examples, Netflix, Amazon Prime, HBO, HULU

Key Features:

• Browse the web and automatically find media to playback, simply tap to play!
• Popular websites like PopcornFlix, Vimeo, Aol, Break, YouTube, CollegeHumor, and DailyMotion supported.
• Choose your own search-engine including Bing, Google, and DuckDuckGo.
• Support for new video websites added daily and on request of our users.
• FREE Built in Ad-Blocker for worry free surfing.
• Hassle-free surfing since we block Ad's, Miners and Tracking services.
• Browse your home network and play via Samba or DLNA / UPNP file share.
• Send your favorite photos from your phone or tablet to your TV.
• Supports subtitles when/where supported on the playback device.
• Full playback control including seeking to a position in the media.
• Intuitive hassle-free interface with many extra options (LONG-PRESS an item to see!).
• Bookmark items like videos, music, and websites to return to easily.
• Download items to your local device to save for playback later locally or via Castie.
• Automatic Artwork search for files without artwork (IE: videos, music).
• Playlist support regardless of device type.
• Find something you want to share? Secure-Sharing option allows sharing of files with friends and family.
• Support for avi, mkv, mp4, ts, and hls (Live-TV) videos where supported on the playback device.
• Support for lossless flac audio, mp3, pcm, ogg, and other audio formats where supported on the playback device.
• Support for industry-standard image formats like jpeg, gif, png, and bmp where supported on the playback device.
• Support for Android phones, tablets, TV Sticks, Android boxes, and Android TV devices.

Castie is optimized for the latest versions of Android: Pixel, Pixel XL, Galaxy, HTC, LG, Huewai, Xiaomi, Galaxy Tablets, and Android TV devices like the NVIDIA Shield or TV's with Android embedded.