<br />On Tuesday, August 20, 2013 16:26 CEST, Karl Dietz <dekarl@spaetfruehstuecken.org> wrote:<br /> <blockquote>On 20.08.2013 16:05, Marius Schrecker wrote:<br />><br />> On Tuesday, August 20, 2013 15:30 CEST, "Michael T. Dean"<br />> wrote:<br />><br />> On 08/20/2013 05:00 AM, Marius Schrecker wrote:<br />> > Hi again,<br />> ><br />> > For a period, my set top box was spitting out to my hd-pvr in the<br />> > wrong format (4:3 instead of 16:9). This was handled okay by the tv,<br />> > but the recordings made during this time are all windowboxed and<br />> > compressed horizontally.<br />><br />> Note, too, that it's possible--depending on how it's broken--that fixing<br />> the videos may be as simple as changing the display aspect ratio in the<br />> stream (i.e. may not require actually decoding/scaling/re-encoding the<br />> video). I don't know which tools are best to
use to do this, though.<br /><br />> I'll poke around in the files themselves to see if the aspect can be<br />> patched there.<br /><br />see DVB Document A154 on frame compatible plano-stereoscopic DVB-3DTV<br />Annex B: HDTV service compatibility. [1]<br /><br />Basically you fiddle with the H.264 bitstream to enable frame cropping<br />and change the sample aspect ratio.<br /><br />The sample aspect ratio would be the same value as anamorphic HDTV<br />16:9 in 1440x1080 pixels. Then enable cropping and set proper offsets.<br /><br />I have no idea if our player supports that. So a small sample from such<br />a file could go into the our sample file collection.<br /><br />Regards,<br />Karl<br /><br />[1] http://www.dvb.org/technology/standards/a154_DVB-3DTV_Spec.pdf<br />_______________________________________________<br />mythtv-users mailing list<br />mythtv-users@mythtv.org<br />http://www.mythtv.org/mailman/listinfo/mythtv-users</blockquote>Hi Karl,<br /><
br /> Thabnks for the pointer. It's way over my head, but I can certainly provide a sample file if that would be useful. Will try to extract something when I get time.<br /><br />Cheers!<br /><br />Marius<br /><br /><br /><br />