Re: how to copy just part of a file?
> On Wed, 16 Jul 2003, BSD baby wrote: > > > Is there an easy built-in way to copy only part of a file? > > > > I want to take a WAV audio file and copy from #__ bytes to > > #___ bytes into a new file. > > > > (I'm making 30-second clips of files.) You might find WavSplit (http://www.xmailserver.org/davide.html) useful. It will split a wav file into sections of X seconds each. It isn't part of the ports collection yet, but I just submitted a PR to add it. -- Matt Emmerton ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: how to copy just part of a file?
On Wed, 16 Jul 2003, BSD baby wrote: > Is there an easy built-in way to copy only part of a file? > > I want to take a WAV audio file and copy from #__ bytes to > #___ bytes into a new file. > > (I'm making 30-second clips of files.) Try "dd". Thus: dd bs=1 skip=$offset count=$length < infile > outfile It is possible that a block size of one byte is kind of inefficient, so if you can operate in units of some larger size that might be good. For example "bs=1k". See "man dd". Also, remember that WAV files have a 44 byte (or was that 42...?) wav header. Yes, you can extract it with "dd bs=44 count=1", but I'm too lazy to find out whether you can just prepend it to any split files right now (i.e. if the file contains any length info; I suspect not). > Though I found a scripting way to do it with PHP, I'm wondering > if there's a more direct way to do it with basic GNU/BSD commands. Ever heard of POSIX... ;-) $.02, /Mikko ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: how to copy just part of a file?
In the last episode (Jul 16), Chuck Swiger said: > BSD baby wrote: > [ ... ] > > Though I found a scripting way to do it with PHP, I'm wondering if > > there's a more direct way to do it with basic GNU/BSD commands. > > GNU split will take options related to size/byte counts, rather than > just ASCII lines. ... as will any other POSIX-conforming split, including FreeBSD's. But you need more than that because wav files have a header that you'll have to duplicate onto each output file. You can use the sox port to convert the wav file into a raw pcm file that can be split up, then convert the pieces back to wavs with sox again. -- Dan Nelson [EMAIL PROTECTED] ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: how to copy just part of a file?
BSD baby wrote: [ ... ] Though I found a scripting way to do it with PHP, I'm wondering if there's a more direct way to do it with basic GNU/BSD commands. GNU split will take options related to size/byte counts, rather than just ASCII lines. -- -Chuck ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
how to copy just part of a file?
Is there an easy built-in way to copy only part of a file? I want to take a WAV audio file and copy from #__ bytes to #___ bytes into a new file. (I'm making 30-second clips of files.) Though I found a scripting way to do it with PHP, I'm wondering if there's a more direct way to do it with basic GNU/BSD commands. Anyone? ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
