This is excellent news. One feature / design request (that may already be possible in the design): correct handling of multiple audio streams. Sometimes it is absolutely necessary to keep more than one audio stream (sometimes up to 4) intact when cutting.
As far as advanced audio is concerned, I'm not aware of any DVB-S signal available in North America that has anything other than MPEG2 audio, or AC-3, (or Dolby-E, which is impossible to deal with unless you have a Dolby labs decoder - a multi thousand dollar piece of equipment), or some combination of these. In some cases again, it might be handy to be able to keep more than one of these in the output (above, I was referring to many streams of the same type of audio). Andrew On Sun, Feb 22, 2009 at 4:12 PM, Levente Novák <lno...@dragon.unideb.hu> wrote: > 2009. 02. 22, vasárnap keltezéssel 23.35-kor Michael Riepe ezt írta: >> Hi! >> >> The list may be quiet, but there are things going on behind the >> curtains. I've been working on a new indexer for dvbcut2 now for a >> while, and things look pretty good. The new code will not only be able >> to detect AC-3 (and Enhanced AC-3) audio tracks in MPEG transport >> streams more easily (and more reliably), I also have basic support for >> MPEG-4 AVC (aka H.264) video already. >> > > Nice! > >> My new MPEG-2 video indexer recognizes the use of closed captions (which >> are transmitted inside the video stream in ATSC). I don't know how to >> decode the data, however. DVB and teletext subtitles are better >> documented, but I haven't seen any streams that actually used them. DVD >> subtitles are yet another story. At least I found a somewhat complete >> format description somewhere on the net. The questions remain, however, >> which output format dvbcut2 should use, and how to convert all the >> different input formats to that single output format. Maybe an internal >> intermediate format will help with that. Since a subtitle essentially is >> a partially transparent image (with a timestamp and a duration attached >> to it), something like PNG might be appropriate. >> > > Concerning teletext, AFAIK the ivtv cards are capable to embed VBI in > the MPEG stream (but I never tried this). > >> The jury is still out on other audio formats. DTS, Advanced Audio Coding >> (AAC), MPEG Lossless Coding and LPCM come to mind, but they aren't >> exactly used very often in Europe (Region 2 DVDs usually contain MPEG >> and AC-3 audio, and I haven't dealt with Blu-ray yet). Does any DVB or >> ATSC station in the world broadcast one of these formats? >> >> I'm currently working with MPEG transport streams as the container >> format because that's the hardest part. Adding support for program >> streams (including DVD VOB files) later will be relatively easy. Since >> the code I have so far is modular by design, it may also be possible to >> add support for, say, AVI files. >> >> By the way: there's a huge difference between the way dvbcut handles >> data and the way dvbcut2 will. dvbcut2 will be "data driven", that is, >> you set up a processing pipeline and then push the data through it. It >> should also be possible to run the pipeline in the background, in >> another thread. Maybe you can also assign particular parts of it to >> separate threads (e.g. to process audio and video in parallel). That way >> we might get a little more performance on the now-common multi-core >> machines. >> > > I am eagerly waiting a release (or a SVN tree). Keep up the work and > thank you a lot for your efforts! Once there is something out, I would > be pleased to test it and report my observations. > > Levente > > > > ------------------------------------------------------------------------------ > Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA > -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise > -Strategies to boost innovation and cut costs with open source participation > -Receive a $600 discount off the registration fee with the source code: SFAD > http://p.sf.net/sfu/XcvMzF8H > _______________________________________________ > DVBCUT-user mailing list > DVBCUT-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/dvbcut-user > ------------------------------------------------------------------------------ Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise -Strategies to boost innovation and cut costs with open source participation -Receive a $600 discount off the registration fee with the source code: SFAD http://p.sf.net/sfu/XcvMzF8H _______________________________________________ DVBCUT-user mailing list DVBCUT-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dvbcut-user
