From: Ole C. <Ole...@we...> - 2005-11-30 05:01:47
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Cyrus Patel wrote: > On 28 Nov 2005 at 18:56, Ole Christensen wrote: > > >>- Cells on DVDs authored with ~professional~ tools often (if not >>always) reset SCR on new cells. > > > well, technically speaking, VOBUs (not cells). But that distinction > is obscure when authoring with dvdauthor since dvdauthor puts each > cell in its own vobu. Cyrus, did you really mean VOBU? Confusing with Vob-Id? Excerpt from The Unofficial DVD Specifications Guide: http://dvd-replica.com/ A cell is comprised of one or more Video Object Units (VOBU). Each VOBU consists of 0.4 second to 1 second of playback time. All VOBUs belong to the same cell have the same VOB Id (from 1 to 65,535) and Cell Id (from 1 to 255). > > >>- Beginning a new cell is not a real ~hack~. It fixes the problem and >>afaik usually has no further impact for playback on standalone players >>(is this really true?!). > > > IIRC, dvdauthor always flags cells generated with <cell ... /> as a > discontinuity, even if there isn't one (no cell commands, is adjacent > sector etc). Whether that discontinuity is noticeable or not (whether > the player has to seek) depends on how well designed the player is. Well, seems my (cheap) players are "well designed". If the cell change, i.e. the discontinuity does not occur in the middle of a scene, you will probably not notice it. And if you have concatenated content, it will probably not concatenate a scene from more than a single source. > Which is why I considered my statement "ensure that the pack/sector > in which SCR gets reset is at the beginning of a new cell" to be > hack. Ok, technically speaking its a clean solution, but in the > context of reauthoring with dvdauthor, it makes another bug/feature > rear its ugly head. So I still consider this approach not only as a clean technical solution but a working and satisfying one. Don't punish dvdauthor for something it isn't able to help. Setting discontinuity on cell change is perfectly acceptable. And rewriting the timestamps is not an easy thing as I stated before. |