Tracking lowest timestamp on any active input stream.Hashing algorithms map data to an arbitrary fixed-size value. Multiple input files, ffmpeg tries to keep them synchronized by Input files and get packets containing encoded data from them. ,ffmpeg calls the libavformat library (containing demuxers) to read Theĭiagram above will, in this case, simplify to this: It is usefulįor changing the container format or modifying container-level metadata. Step for the specified stream, so it does only demuxing and muxing. It makes ffmpeg omit the decoding and encoding ,Stream copy is a mode selected by supplying the copy parameter to the Anything found on the command line whichĬannot be interpreted as an option is considered to be an output url. i option, and writes to an arbitrary number of output 'files', which are ,How can I change the metadata of a file with ffmpeg/avconv without changing the audio or video of it and without creating a new file? Is there another commandline/python tool which would do the job for me?įfmpeg reads from an arbitrary number of input 'files' (which can be regularįiles, pipes, network streams, grabbing devices, etc.), specified by the

Some formats are quick and easy to modify the metadata, and others take longer due to how the data has be re-written.

Some do not append data at the end of the file (it is included elsewhere in the file). Because I have to handle many different file formats (wav, flac, mp3, mp4, ogg, ogv.) it would be great to have a tool which add meta data to arbitrary formats.,Īnd there are other audio and video formats. So you cannot alter the metadata without first creating a temporary file, then renaming files after.,Now I want to program a function which shall add the information from the meta data text files to all media files (the original and the converted ones). Since changing the metadata will change the length of the file, and I expect the metadata is near the beginning of the file, the audio and video would start at a different offset from the beginning of the file.

Ffmpeg map metadata