metadata comment="An exercise in Realmedia metadata" \ If any additional metadata tags are specified that are not in the preceding table, the FFmpeg MP3 muxer encodes a TXXX user-defined information frame containing both the key and the value.įFmpeg's transport stream muxer honors the following metadata keys:įFmpeg’s NUT muxer honors the following metadata keys:įFmpeg’s Realmedia muxer encodes a “CONT” chunk by concatenating certain metadata values specified on the command line. The muxer honors the following metadata keys: In addition to user-specified key/value metadata pairs, FFmpeg's FLV muxer also encodes the following metadata fields:įFmpeg's Matroska muxer honors the following metadata keys:īeyond these keys, the Matroska muxer also accepts free-form key/value metadata pairs.įFmpeg's MP3 muxer creates an ID3v2 tag compatible with either v2.3 or v2.4. These key/value pairs are presented to the Adobe Flash Player through the onMetaData event when loading the FLV. This tag may contain free-form metadata key/value pairs.
FFmpeg does not allow this key to be overridden from the command line.įFmpeg’s ASF muxer honors the following metadata keys:īeyond these keys, the ASF muxer accepts free-form key/value metadata keys to be encoded into the header. Information dialog when selecting "Show Description" in context menuįurther, the MOV muxer encodes libavformat version string into the '\251too' field.
VIDEO MEDIA META DATA TAGS CODE
For the interested but uninitiated, the notation, e.g., '\251nam' indicates a 4-byte code consisting of the byte A9 in hexadecimal (or 251 in octal) followed by the ASCII characters 'n', 'a', and 'm'. The low-level identifier column lists the atom name that the format uses to encode the data on disc, which is not interesting to most readers. The following table shows the metadata keys that FFmpeg honors when muxing a QuickTime file. This page documents which keys FFmpeg will encode into which formats. Many formats only support a handful of metadata keys. Whether the metadata key/value pairs are actually encoded into the output file is dependent upon the file format being muxed. The option is -metadata and is used as such:įfmpeg -i inputfile -metadata title="Movie Title" -metadata year="2010" outputfile FFmpeg has a free-form command line option that allows the user to specify key/value pairs for encoding metadata.
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