FLV File Documentation

Overview

Feature Value
File Extension .flv
MIME Type video/x-flv
Container Format Flash Video
Video Compression Sorenson Spark, VP6, H.264
Audio Compression MP3, AAC, Linear PCM, ADPCM
Developed by Macromedia
Initial Release 2002
Streaming Support Yes
Metadata Support Yes
Maximum File Size Not strictly limited, but 2 GB recommended for compatibility
Adaptive Bitrate Streaming No
DRM Support Limited, through Adobe Access
Frame Rates Up to 120 fps
Resolution Not fixed, supports up to 4K
Aspect Ratio Variable
Color Depth 24-bit
Alpha Channel Supported (with VP6 and later formats)
3D Support No
Subtitle Support Yes, via separate files or embedded cue points
Popularity Declining, due to the rise of HTML5 and decline of Flash Player support