lossless video editing package or library for DV and Mpeg
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From: James Harris on 6 Feb 2010 05:26 On 5 Jan, 16:59, James Harris <james.harri...(a)googlemail.com> wrote: .... > > Can anyone recommend a lossless video editor program which will work > > with DV, mpeg-2 and mpeg-4? Ideally it would be freeware. If two > > programs are needed - one for DV and another for mpegs - that would be > > OK but just one program would be better. > > > I have mpeg-2 files and DV tapes that I'd like to edit. Windows Movie > > Maker turned out to be very disappointing as it lost picture quality > > so I'm looking for something that works losslessly. That said, I > > recognise that for mpegs some alteration of the GOP structure around > > the edit would be necessary but it should revert to the original GOP > > data as soon as possible. > > > Software for Windows or Linux would be OK. Windows would possibly be > > more convenient. I cannot find either free or to-pay-for video editing software that makes a virtue of being lossless. Of course, only DV can be fully lossless. Mpeg can be almost lossless. Some 'stitching' would normally be required to maintain the GOP round edits but the effect would be minor and localised. In the absence of suggestions for a pre-built lossless editor I'm turning to the programming newsgroups. Anyone know of DV and Mpeg libraries that can be used for lossless frame-accurate processing? James
From: Richard Crowley on 6 Feb 2010 12:38 "James Harris" wrote ... > I cannot find either free or to-pay-for video editing software that > makes a virtue of being lossless. Of course, only DV can be fully > lossless. Mpeg can be almost lossless. Some 'stitching' would normally > be required to maintain the GOP round edits but the effect would be > minor and localised. > > In the absence of suggestions for a pre-built lossless editor I'm > turning to the programming newsgroups. > > Anyone know of DV and Mpeg libraries that can be used for lossless > frame-accurate processing? Not clear what you are asking for? Are you an end-user looking for a video editing application? Are you a computer programmer looking for software libraries for video datastream handling? As was mentioned, "lossless frame-accurate" editing is not really possible in any temporally-compressed codec (which means virtually all MPEG flavors). DV, of course, is NOT temporally-compressed.
From: James Harris on 6 Feb 2010 19:01 On 6 Feb, 17:38, "Richard Crowley" <rcrow...(a)xp7rt.net> wrote: > "James Harris" wrote ... > > > I cannot find either free or to-pay-for video editing software that > > makes a virtue of being lossless. Of course, only DV can be fully > > lossless. Mpeg can be almost lossless. Some 'stitching' would normally > > be required to maintain the GOP round edits but the effect would be > > minor and localised. > > > In the absence of suggestions for a pre-built lossless editor I'm > > turning to the programming newsgroups. > > > Anyone know of DV and Mpeg libraries that can be used for lossless > > frame-accurate processing? > > Not clear what you are asking for? Are you an end-user looking for > a video editing application? Are you a computer programmer > looking for software libraries for video datastream handling? Yes and, er, yes. I'd rather hear of an existing app which does what I want but that doesn't seem to exist so I'd have to fall back to writing something myself. How easy that is would depend on the quality of the library if it exists. > As was mentioned, "lossless frame-accurate" editing is not really > possible in any temporally-compressed codec (which means virtually > all MPEG flavors). DV, of course, is NOT temporally-compressed. I think I said that. Frame-accurate is possible. Lossless is possible for DV and for most of an Mpeg stream. It's only the few frames round the edit that would need some processing. James
From: Mike S. on 12 Feb 2010 17:21 In article <3b612eb2-c793-4a9e-8f97-79e652737964(a)g28g2000yqh.googlegroups.com>, James Harris <james.harris.1(a)googlemail.com> wrote: >On 5 Jan, 16:59, James Harris <james.harri...(a)googlemail.com> wrote: > >... > >> > Can anyone recommend a lossless video editor program which will work >> > with DV, mpeg-2 and mpeg-4? Ideally it would be freeware. If two >> > programs are needed - one for DV and another for mpegs - that would be >> > OK but just one program would be better. >> >> > I have mpeg-2 files and DV tapes that I'd like to edit. Windows Movie >> > Maker turned out to be very disappointing as it lost picture quality >> > so I'm looking for something that works losslessly. That said, I >> > recognise that for mpegs some alteration of the GOP structure around >> > the edit would be necessary but it should revert to the original GOP >> > data as soon as possible. >> >> > Software for Windows or Linux would be OK. Windows would possibly be >> > more convenient. > >I cannot find either free or to-pay-for video editing software that >makes a virtue of being lossless. Of course, only DV can be fully >lossless. Mpeg can be almost lossless. Some 'stitching' would normally >be required to maintain the GOP round edits but the effect would be >minor and localised. AFAIK the payware VideoReDo packages can do frame-accurate lossless editing of MPEG2. VideoReDo TV Suite is specifically targeted to editing for eventual authoring on DVD.
From: paul van den berg on 13 Feb 2010 11:14
On Sat, 6 Feb 2010 02:26:03 -0800 (PST) James Harris <james.harris.1(a)googlemail.com> wrote: > On 5 Jan, 16:59, James Harris <james.harri...(a)googlemail.com> wrote: > > > Anyone know of DV and Mpeg libraries that can be used for lossless > frame-accurate processing? > Not libs, but GUI-programs that use existing mpeg libs: http://dvbcut.sourceforge.net/ or http://gopchop.sourceforge.net/ Regards, Paul |