On Thursday 14 December 2006 23:47, Hans Verkuil wrote:
> Hi all,
>
> Can someone make the following available for downloading:
>
> I need two NTSC captures from a movie (NOT a 'made for TV' movie but
> a 'real' movie that was made for movie theatres). I think that it is
> best that it is from a recent movie (say from the last 3-4 years).
>
> First run 'v4l2-ctl -c video_pulldown=0'. Then make the first
> capture: the first capture should be about a minute and captured with
> a plain 'cat /dev/video0 >1.mpg'. To make the second capture first
> issue this command: 'v4l2-ctl -c video_pulldown=1', then start
> capturing another minute with 'cat /dev/video0 >2.mpg'.
>
> Capture from a decent quality channel with a clear picture and should
> be 720x480 (so no scaling).
>
> I want to compare two such streams to see if the 3:2 pulldown control
> really works (and if so, if it does what I think it does).
>
> But since this control is NTSC-only I need some help here!
Of course, if you have two cards in the same box with equally good
picture quality, then it would be even better if each records the same
picture but with different video_pulldown settings. Although for the
purposes of this test both cards should have the same digitizer
(saa7115 vs cx2584x). So either both cards are a PVR250/350 or both are
a PVR150/500.
Hans
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