On 30/09/2007, Harald Dunkel <[EMAIL PROTECTED]> wrote: > Sander Sweers wrote: > > > > IVTV will record at whatever resolution you tell it to. If you capture > > 16:9 signal with a 4:3 resolution you will get the black borders. So > > your black borders are caused on the recording side not IVTV. > > > > Mythtv captures 480x480 by default and I suspect you are using that. > > > > Its 720x576, but I see your point. The problem is that if I try > to change the video capture format using > > v4l2-ctl --streamoff > v4l2-ctl --set-fmt-video=width=720,height=480 > v4l2-ctl --streamon > > (just as an example) then this doesn't have any visible effect.
That would just change the capture resolution to an NTSC resolution. You need to change the aspect ratio that is recorded in the MPEG stream, even though it will still be captured at 720x576 (PAL). I encountered this issue when using a cable TV box that was outputting a 16:9 programme within a 4:3 frame - this gave rise to letterboxing top and bottom. Getting the cable TV box to output a widescreen signal with no changes to my ivtv configuration removed the letterboxing, but produced horizonally compressed video when played back using a correct X configuration for my output device. Once I got ivtv to flag the recording as 16:9 widescreen to match the input, and played the video back on a 16:10 monitor with correct DisplaySize option in my xorg.conf's Monitor section, the display of the video was correct widescreen output with only a narrow letterboxing to reflect the difference between the AR of the video (16:9) and the AR of the monitor |16:10). Some channels are still broadcast in a pseudo-widescreen (14:9) format, but as many are now 16:9 I get 'normal' recordings more often than not. -- Nick Morrott MythTV Official wiki: http://mythtv.org/wiki/ MythTV users list archive: http://www.gossamer-threads.com/lists/mythtv/users "An investment in knowledge always pays the best interest." - Benjamin Franklin _______________________________________________ ivtv-users mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-users
