11/30/2022 0 Comments Recompress flacforce is needed to make sure you really want to overwrite abc.flac with a new version. This one's a little tricky: notice that flac is in encode mode by default (you have to specify -d to decode) so this command actually recompresses abc.flac back to abc.flac. Like above, except abc.wav is deleted if there were no errors or warnings.Įncode abc.wav to abc.flac using the highest compression setting.Įncode abc.wav to abc.flac and internally decode abc.flac to make sure it matches abc.wav.įlac -T "TITLE=Bohemian Rhapsody" -T "ARTIST=Queen" abc.wavĮncode abc.wav and add some tags at the same time to abc.flac.Įncode all. Like above, except abc.wav is deleted if there were no errors. Recompress flac full#However, if you are looking to maximize the compression rate or speed, or want to use the full power of FLAC's metadata system, see About the FLAC Format.Įncode abc.wav to abc.flac using the default compression setting. compression tradeoff for many kinds of input. specifying new tags, seekpoints, cuesheet, padding, etc.).įlac has been tuned so that the default settings yield a good speed vs. It will also preserve all the metadata unless you override it with other options (e.g. In other words, you can specify a FLAC or Ogg FLAC file as an input to the encoder and it will decoder it and re-encode it according to the options you specify. Both decode and test modes detect errors in the stream, but they also detect when the MD5 signature of the decoded audio does not match the stored MD5 signature, even when the bitstream is valid.įlac can also re-encode FLAC files. In test mode, flac acts just like in decode mode, except no output file is written. If it is a RIFF WAVE or AIFF file the format options are not needed since they are read from the AIFF/WAVE header. The format options are used to tell flac the arrangement of samples if the input file (or output file when decoding) is a raw file. The encoding options affect the compression ratio and encoding speed. To encode or decode files that start with a dash, use - to signal the end of options, to keep the filenames themselves from being treated as options: Since the former allows flac to seek backwards to write the STREAMINFO or RIFF WAVE header contents when necessary.Īlso, you can force output data to go to stdout using -c. If you are encoding/decoding from stdin to a file, you should use the -o option like so: The original file is not deleted unless -delete-input-file is specified. Otherwise flac will perform the desired operation on each input file to similarly named output files (meaning for encoding, the extension will be replaced with ".flac", or appended with ".flac" if the input file has no extension, and for decoding, the extension will be ".wav" for WAVE output and ".raw" for raw output). When stdin is used as input, flac will write to stdout. If only one inputfile is specified, it may be "-" for stdin. In any case, if no inputfile is specified, stdin is assumed. Skip to the tutorial below for examples of some common tasks.įlac will be invoked one of four ways, depending on whether you are encoding, decoding, testing, or analyzing:Įncoding: flac ]ĭecoding: flac -d ]Īnalyzing: flac -a ] 8 (or -fast and -best) that control the compression level actually are just synonyms for different groups of specific encoding options (described later) and you can get the same effect by using the same options 3) flac behaves similarly to gzip in the way it handles input and output files. Other than this, flac makes no assumptions about file extensions, though the convention is that FLAC files have the extension ".flac" (or ".fla" on ancient "8.3" file systems like FAT-16).īefore going into the full command-line description, a few other things help to sort it out: 1) flac encodes by default, so you must use -d to decode 2) the options -0. It also assumes that files ending in ".oga" or ".ogg" or have the Ogg FLAC header present are Ogg FLAC files. This assumption may be overridden with a command-line option. This is not a limitation of the FLAC format, just the reference encoder/decoder.įlac assumes that files ending in ".wav" or that have the RIFF WAVE header present are WAVE files, files ending in ".aif" or ".aiff" or have the AIFF header present are AIFF files, and files ending in ".flac" or have the FLAC header present are FLAC files. flac only supports linear PCM samples (in other words, no A-LAW, uLAW, etc.), and the input must be between 4 and 24 bits per sample. The decoder currently can output to RIFF WAVE or AIFF format, or raw interleaved samples. The encoder currently supports as input RIFF WAVE, AIFF, FLAC or Ogg FLAC format, or raw interleaved samples. Flac is the command-line file encoder/decoder.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |