Keep an eye on the Hz, s16/s24/s32 and kb/s, as they're indicators of audio quality.Įxtract Audio Streams Extract Full Audio Streams Stream #2 is the PCM 5.1 high resolution mix. Stream #1 is the PCM two channel stereo mix. We'll skip this stream since we want audio only PCM WAV Stream #0 on this audio only Blu-Ray is only a black screen with song titles. We could use:įfmpeg -i input.User $ ffplay. So let’s say we had three input streams, 0:0 (video), 0:1 (audio), and 0:2 (subtitle) and we wanted to copy the metadata for all three streams and the global metadata. Note that simple 0 would work as well in this example, since global metadata is assumed by default. copy global metadata to all audio streams:įfmpeg -i in.mkv -map_metadata:s:a 0:g out.mkv A negative file index can be used to create a dummy mapping that just disables automatic copying.įor example to copy metadata from the first stream of the input file to global metadata of the output file:įfmpeg -i in.ogg -map_metadata 0:s:0 out.mp3
These default mappings are disabled by creating any mapping of the relevant type. If metadata specifier is omitted, it defaults to global.īy default, global metadata is copied from the first input file, per-stream and per-chapter metadata is copied along with streams/chapters. program_index is the zero-based program index. p:program_index – per-program metadata.chapter_index is the zero-based chapter index. c:chapter_index – per-chapter metadata.In an output metadata specifier, all matching streams are copied to. In an input metadata specifier, the first matching stream is copied from. stream_spec is a stream specifier as described in the Stream specifiers chapter. A metadata specifier can have the following forms:
Optional metadata_spec_in/out parameters specify, which metadata to copy. Note that those are file indices (zero-based), not filenames. Set metadata information of the next output file from infile. map_metadata infile (output,per-metadata) The documentation for the -map_metadata option for FFmpeg reads:
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