mirror of https://git.ffmpeg.org/ffmpeg.git
69 lines
1.8 KiB
Plaintext
69 lines
1.8 KiB
Plaintext
|
@chapter Metadata
|
||
|
|
@c man begin METADATA
|
||
|
|
|
||
|
|
FFmpeg is able to dump metadata from media files into a simple UTF-8-encoded
|
||
|
|
INI-like text file and then load it back using the metadata muxer/demuxer.
|
||
|
|
|
||
|
|
The file format is as follows:
|
||
|
|
@enumerate
|
||
|
|
|
||
|
|
@item
|
||
|
|
A file consists of a header and a number of metadata tags divided into sections,
|
||
|
|
each on its own line.
|
||
|
|
|
||
|
|
@item
|
||
|
|
The header is a ';FFMETADATA' string, followed by a version number (now 1).
|
||
|
|
|
||
|
|
@item
|
||
|
|
Metadata tags are of the form 'key=value'
|
||
|
|
|
||
|
|
@item
|
||
|
|
Immediately after header follows global metadata
|
||
|
|
|
||
|
|
@item
|
||
|
|
After global metadata there may be sections with per-stream/per-chapter
|
||
|
|
metadata.
|
||
|
|
|
||
|
|
@item
|
||
|
|
A section starts with the section name in uppercase (i.e. STREAM or CHAPTER) in
|
||
|
|
brackets ('[', ']') and ends with next section or end of file.
|
||
|
|
|
||
|
|
@item
|
||
|
|
At the beginning of a chapter section there may be an optional timebase to be
|
||
|
|
used for start/end values. It must be in form 'TIMEBASE=num/den', where num and
|
||
|
|
den are integers. If the timebase is missing then start/end times are assumed to
|
||
|
|
be in milliseconds.
|
||
|
|
Next a chapter section must contain chapter start and end times in form
|
||
|
|
'START=num', 'END=num', where num is a positive integer.
|
||
|
|
|
||
|
|
@item
|
||
|
|
Empty lines and lines starting with ';' or '#' are ignored.
|
||
|
|
|
||
|
|
@item
|
||
|
|
Metadata keys or values containing special characters ('=', ';', '#', '\' and a
|
||
|
|
newline) must be escaped with a backslash '\'.
|
||
|
|
|
||
|
|
@item
|
||
|
|
Note that whitespace in metadata (e.g. foo = bar) is considered to be a part of
|
||
|
|
the tag (in the example above key is 'foo ', value is ' bar').
|
||
|
|
@end enumerate
|
||
|
|
|
||
|
|
A ffmetadata file might look like this:
|
||
|
|
@example
|
||
|
|
;FFMETADATA1
|
||
|
|
title=bike\\shed
|
||
|
|
;this is a comment
|
||
|
|
artist=FFmpeg troll team
|
||
|
|
|
||
|
|
[CHAPTER]
|
||
|
|
TIMEBASE=1/1000
|
||
|
|
START=0
|
||
|
|
#chapter ends at 0:01:00
|
||
|
|
END=60000
|
||
|
|
title=chapter \#1
|
||
|
|
[STREAM]
|
||
|
|
title=multi\
|
||
|
|
line
|
||
|
|
@end example
|
||
|
|
@c man end METADATA
|