<br><div class="gmail_quote"><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><br>From my research it seems a VOBU can vary in length from between 0.4<br>
seconds to 1 second. I haven't found any useful statistics on an<br>average VOBU length. My understanding is that there isn't any...it<br>will vary from movie to movie, and may even vary significantly from<br>place to place within a movie. If this is the case, then I guess <br>
</blockquote><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">you<br>
just have to make a best guess, right?. Does anyone know how the<br>current seekSpeedMap rates were arrived at? </blockquote><div><br>DVDs in the vobu search information provide offsets to 0.5, 1.0, 1.5,<br>2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 10, 30 and 60 second<br>
backwards and forwards.<br><br>Seeking through the dvd using the sticky ff/rew is not 100%, but this is because mythtv is<br>not designed to be a dvd player<br><br>The seekSpeedMap does the following mapping (and this was trial and error)<br>
<br>3x -> 0.5 seconds behind/forward<br>5x -> 1 seconds behind/forward<br>10x -> 2 seconds behind/forward<br>20x -> 4 seconds behind/forward<br>30x -> 5 seconds behind/forward<br>60x -> 7.5 seconds behind/forward<br>
120x ->10 seconds behind/forward<br>180x -> 30 seconds behind/forward<br><br>So if you choose 4x, and send this info to DVDringbuffer Seek function, it shouldn't work.<br>But since i never thought of someone changing the mapping in tv_play.cpp, I should write in a condition to do nothing if someone enters a speed that is not in the mapping. I suppose this info is fed to the dvdnav function<br>
and it goes crazy and seeks to some unexpected spot on the dvd.<br> <br>would also suggest you read dvd_time_search_within_cell() in libmythdvdnav/searching.c<br>and <a href="http://dvd.sourceforge.net/dvdinfo/dsi_pkt.html">http://dvd.sourceforge.net/dvdinfo/dsi_pkt.html</a> with focus on the sri_bwda and sri_fwda labels.<br>
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