jonas & joe, thanks for advice. jonas, i think it is o.k. to have interlaced video if it ist to be shown from dvd on a tv set. from joe's comments, i understand that it might be better to render video and audio into two separate streams, audio into ac3 and video to yuv4mpeg (instead of dv.mov).
doing so, i got a popup with the following error messages from cinelerra: int YUVStream::read_header(): y4m_read_stream_header() failed: bad stream or frame header int YUVSream::open_read(char*): Bad YUV4MPEG2 header: parameter out of range however a working stream was generated, and after multiplexing i could put the result directly into todisc to make a dvd. no field swapping anymore. great. fantastic! so again, thank you very much, i am impressed. georg On Friday, 20. April 2007 18:18, Joe Friedrichsen wrote: > Hi! > > Your mail comes across as double-spaced, which little difficult to > read and reply to -- I can't see as much of what you say at one time. > I re-formatted below for myself and others :-) > > On 4/19/07, Kurt Georg Hooss <[EMAIL PROTECTED]> wrote: > > hi folks, > > maybe not a cinelerra problem in the strictest sense, > > however maybe someone here can hint me where to look. > > > > i have made a movie on dvd using kino (for grabbing), > > cinelerra (for editing and rendering to q4l.mov), > > tovid (for converting to dvd-compatible .mpg), and dvdauthor. > > > > when watching the results on the computer screen, > > there were the typical comb-like artifacts in horizontal movements, > > which actually did not really disturb me. > > > > however when watching the movie on a dvd player / tv screen, > > then all horizontal movements show such an intense flickering > > that it really gives me a headache, also with strong comb effects. > > > > the only sensible explanation seems that the fields are played > > in reverse order, i.e. say if the camera records top fields first, > > then the player shows bottom fields first, or vice versa. > > I would agree with that -- it sounds like the fields are playing in > reverse order. > > > to find out, i have experimented with the "format" settings in cinelerra > > and rendered four versions of a little test scene, each time starting > > cinelerra from scratch, setting the format, loading footage, rendering: > > > > 1. Preset "PAL" (interlace mode goes automatically to "bottom fields > > first"), > > > > 2. then changed interlace mode to "none", without changing anything else, > > > > 3. and to "top fields first", > > > > 4. and finally with preset "PAL Progressive" (50 fps). > > > > I have then converted these four test movies (tovid -pal -dvd ...) > > and combined them onto a test dvd (todisc -pal -dvd ...). but when > > playing on the dvd player + tv, all four looked the same, horribly > > flickering. > > > > so maybe it is not so much a problem with rendering in cinelerra, > > but with interlacing (and possibly swapping fields) in tovid, i don't > > know. anyone here who had any similar experiences? > > This is probably the best explanation, but it may depend on how you're > rendering. Cinelerra at one point had dv-encoding struggles. In my > experience, it was mainly a loss in quality as blocks became more > visibly obvious. But there have been some discussions about libdv and > I think these abnormalities have been resolved. > > I'm assuming that this is the case and that Cinelerra is correctly > rendering back to quicktime for linux. My next question is why you are > rendering to DV and then to MPEG when Cinelerra can go directly to > MPEG with a pipe. See > http://pengi.films.googlepages.com/shizuocha-pp_footage for an > example; scroll down to the 'Exporting' section. > > Finally, I'm glad that you're using tovid to convert your footage! I'm > one of the developers, and recently a user has added some excellent > instructions about DV and bottom-fields-first interlacing encoding on > our wiki: http://tovid.wikia.com/wiki/Dvsd_field_order_and_mplayer > We're adding his efforts into the code base. > > It sounds like you have discovered some bugs in tovid as well, so > please post about your experiencies on the mailing list or the forum: > http://tovid.wikia.com/wiki/Main_Page#Help > > Joe > > _______________________________________________ > Cinelerra mailing list > Cinelerra@skolelinux.no > https://init.linpro.no/mailman/skolelinux.no/listinfo/cinelerra -- dr.k.g.hooss wissenschaftliche medienberatung tel. +49-(0)451-3003-474 www.schoepfung-und-wandel.de _______________________________________________ Cinelerra mailing list Cinelerra@skolelinux.no https://init.linpro.no/mailman/skolelinux.no/listinfo/cinelerra
