> I've streamed two complete days of a congress > using DarkIce and IceCast, but now I want to cut > the mp3 files in parts, a part per speaker. > > I've actually got four mp3 files, one for each morning > and afternoon, but each is several hundreds megabytes > long (128 Kbits/s stereo) > > Is there any tool available which would allow me to cut > these files without requiring huge amounts of memory or disk > space ?Unfortunately MP3 is not really an editable format (another reason to use Vorbis). Its frame headers and frame data don't necessarily come together in the file, so chopping the file would require quite a lot of reorganization. The only decent methods I've seen proposed meant turning the beginning and ends of files into VBR. I think you're only solution is to convert to .wav do your editing, and then recompress (for mostly voices you'd probably want to downsample etc). I'm sure you can find a decoder than will downsample and downmix when going to wav so that you don't eat up your entire disk. Out of curiosity, why are you recording congress? Anything interesting? jack. --- >8 ---- List archives: http://www.xiph.org/archives/ icecast project homepage: http://www.icecast.org/ To unsubscribe from this list, send a message to 'icecast-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.
you CAN cut on the frame level, and it works OK. there are not many tools out there but one for the mac is: http://www.mcode.de/edit/ hope this helps. -peter On Sunday, January 6, 2002, at 10:44 AM, Jerome Alet wrote:> Hi there, > > maybe someone here could help me solve my problem. > > I've streamed two complete days of a congress > using DarkIce and IceCast, but now I want to cut > the mp3 files in parts, a part per speaker. > > I've actually got four mp3 files, one for each morning > and afternoon, but each is several hundreds megabytes > long (128 Kbits/s stereo) > > Is there any tool available which would allow me to cut > these files without requiring huge amounts of memory or disk > space ? > > I've tried with Audacity but it segfaults after the mp3 import. > > The perfect tool would have three buttons, FastForward, Play and > Cut, but any command line tool accepting a list of durations > would be fine. > > any idea ? > > thanks in advance. > > Jerome Alet > > > > > --- >8 ---- > List archives: http://www.xiph.org/archives/ > icecast project homepage: http://www.icecast.org/ > To unsubscribe from this list, send a message to 'icecast- > request@xiph.org' > containing only the word 'unsubscribe' in the body. No subject is > needed. > Unsubscribe messages sent to the list will be ignored/filtered. >--- >8 ---- List archives: http://www.xiph.org/archives/ icecast project homepage: http://www.icecast.org/ To unsubscribe from this list, send a message to 'icecast-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.
On Sun, 6 Jan 2002, Jack Moffitt wrote:> Unfortunately MP3 is not really an editable format (another reason to > use Vorbis). Its frame headers and frame data don't necessarily come > together in the file, so chopping the file would require quite a lot of > reorganization. The only decent methods I've seen proposed meant > turning the beginning and ends of files into VBR. > > > I think you're only solution is to convert to .wav do your editing, and > then recompress (for mostly voices you'd probably want to downsample > etc).My experience is to the contrary: cutting mp3 files with a simple tools like dd works OK. Just calculate the amount you want to cut (128 kb/s = 128/8 kB/s, say you want 30 minute cuts, which is 30*60 secs, cut the file into (128/8) * (30*60) byte chunks). Akos --- >8 ---- List archives: http://www.xiph.org/archives/ icecast project homepage: http://www.icecast.org/ To unsubscribe from this list, send a message to 'icecast-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.
Hi there, maybe someone here could help me solve my problem. I've streamed two complete days of a congress using DarkIce and IceCast, but now I want to cut the mp3 files in parts, a part per speaker. I've actually got four mp3 files, one for each morning and afternoon, but each is several hundreds megabytes long (128 Kbits/s stereo) Is there any tool available which would allow me to cut these files without requiring huge amounts of memory or disk space ? I've tried with Audacity but it segfaults after the mp3 import. The perfect tool would have three buttons, FastForward, Play and Cut, but any command line tool accepting a list of durations would be fine. any idea ? thanks in advance. Jerome Alet --- >8 ---- List archives: http://www.xiph.org/archives/ icecast project homepage: http://www.icecast.org/ To unsubscribe from this list, send a message to 'icecast-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.
Hi > I've streamed two complete days of a congress > using DarkIce and IceCast, but now I want to cut > the mp3 files in parts, a part per speaker. You could try guesstimating where in the file you want to chop it, and then just do exactly that - open it in a hex editor and brutally slice the bit you want out! You will loose the header, but the file will still play. I tried this using UltraEdit (Windows) - selected the second half of a 20 meg file, saved the selection as a new file with the .mp3 extension, and Winamp played it no probs. Not very elegant, but it works.... Leo --- >8 ---- List archives: http://www.xiph.org/archives/ icecast project homepage: http://www.icecast.org/ To unsubscribe from this list, send a message to 'icecast-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.
On Sun, 6 Jan 2002, Jack Moffitt wrote:> I think you're only solution is to convert to .wav do your editing, and > then recompress (for mostly voices you'd probably want to downsample > etc).OK, that's what Audacity does, but unfortunately the version I've tried breaks with big files (it shouldn't however because it cuts work files in many small chunks)> Out of curiosity, why are you recording congress? Anything interesting?Till today we have recorded two congress in Medicine (french only) which may be of interest because the first one was about the place of women in Medicine, and the second one was about Internet & Medical Pedagogy. However in IT we have also recorded a Python conference, in french, and an english meeting about Zope (http://www.zope.org) which took place in France. If any of you is interested, I can send you the urls bye, and thanks for the help. Jerome Alet - alet@unice.fr - http://cortex.unice.fr/~jerome Fac de Medecine de Nice http://wwwmed.unice.fr Tel: (+33) 4 93 37 76 30 Fax: (+33) 4 93 53 15 15 28 Avenue de Valombrose - 06107 NICE Cedex 2 - FRANCE --- >8 ---- List archives: http://www.xiph.org/archives/ icecast project homepage: http://www.icecast.org/ To unsubscribe from this list, send a message to 'icecast-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.
Hi go to: http://www.tfm.ro/ the util is called: MPEG Audio Scissors i think its shareware, so it should be freely downloadable i use it sometimes to cut my live recorded mp3's with. oh ps: check out our project: http://www.puredj.com to see a nice example of ices / icecast streaming station. Luke luckyluke@puredj.com / l.keulers@stud.tue.nl At 16:44 6-1-2002 +0100, you wrote:>Hi there, > >maybe someone here could help me solve my problem. > >I've streamed two complete days of a congress >using DarkIce and IceCast, but now I want to cut >the mp3 files in parts, a part per speaker. > >I've actually got four mp3 files, one for each morning >and afternoon, but each is several hundreds megabytes >long (128 Kbits/s stereo) > >Is there any tool available which would allow me to cut >these files without requiring huge amounts of memory or disk >space ? > >I've tried with Audacity but it segfaults after the mp3 import. > >The perfect tool would have three buttons, FastForward, Play and >Cut, but any command line tool accepting a list of durations >would be fine. > >any idea ? > >thanks in advance. > >Jerome Alet--- >8 ---- List archives: http://www.xiph.org/archives/ icecast project homepage: http://www.icecast.org/ To unsubscribe from this list, send a message to 'icecast-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.