flvlib 0.1.13

Parsing, manipulating and indexing FLV files

A library for manipulating, parsing and verifying FLV files.

It includes three example scripts, debug-flv, index-flv and retimestamp-flv which demonstrate the possible applications of the library.

Provides an easy and extensible way of writing applications that parse and transforming FLV files. Checks file correctness based on the official specification released by Adobe.

Can be used as a drop-in replacement for FLVTool2, from which it is typically much faster. Unlike FLVTool2 it works on audio-only files and does not overwrite any previous metadata the file might have.

Example usage

Printing FLV file information

$ debug-flv file.flv | head -5
=== `file.flv' ===
#00001 <AudioTag at offset 0x0000000D, time 0, size 162, MP3>
#00002 <AudioTag at offset 0x000000BE, time 0, size 105, MP3>
#00003 <VideoTag at offset 0x00000136, time 0, size 33903, VP6 (keyframe)>
#00004 <AudioTag at offset 0x000085B4, time 26, size 105, MP3>

Indexing and FLV file

$ index-flv -U file.flv
$ debug-flv --metadata file.flv
=== `file.flv' ===
#00001 <ScriptTag onMetaData at offset 0x0000000D, time 0, size 259>
{'duration': 9.979000000000001,
 'keyframes': {'filepositions': [407.0], 'times': [0.0]},
 'metadatacreator': 'flvlib 0.x.x'}

Retimestamping an FLV file

$ debug-flv file.flv | head -5
=== `file.flv' ===
#00001 <AudioTag at offset 0x0000000D, time 100, size 162, MP3>
#00002 <AudioTag at offset 0x000000BE, time 100, size 105, MP3>
#00003 <VideoTag at offset 0x00000136, time 100, size 33903, VP6 (keyframe)>
#00004 <AudioTag at offset 0x000085B4, time 126, size 105, MP3>

$ retimestamp-flv -U file.flv
$ debug-flv file.flv | head -5
=== `file.flv' ===
#00001 <AudioTag at offset 0x0000000D, time 0, size 162, MP3>
#00002 <AudioTag at offset 0x000000BE, time 0, size 105, MP3>
#00003 <VideoTag at offset 0x00000136, time 0, size 33903, VP6 (keyframe)>
#00004 <AudioTag at offset 0x000085B4, time 26, size 105, MP3>