[FFmpeg-user] Grabbing quality from TV card
de.techno at gmail.com
Thu Mar 15 07:08:57 CET 2012
I'll also suggest using x264.
On Mar 14, 2012 9:39 PM, "tovis" <mailer.tovis at freemail.hu> wrote:
> Hi Rodney!
> It is much better with "-qscale 2" even if I use 640x480 resolution :D I
> steel have errors:
> libv4l2: error dequeuing buf: Resource temporarily unavailable
> > I don't know about the "Resource temporarily unavailable" errors -
> perhaps Carl Eugen (or one of the other devs) may have an idea. I'd try
> Carl's suggestion re yadif too - if you have an interlaced source you
> probably want
> > to run it through the deinterlace filter.
> Definitely I have interlaced input. I have put v4l2-info's output into the
> pastebin: http://pastebin.com/SWb1u94B
> The VIDIOC_G_FMT(VIDEO_CAPTURE) shows that is it has resolution 320x240
> and it is interlaced and pixelformat 0x33524742 [BGR3].
> I'm not so much understand v4l2 interface, there is such an interface
> video overlay which have resolution 768x576, also interlaced. ffmpeg can
> not use this interface?
> Also how deinterlace/filter command parameter should be look like? I know
> I ask too much, but I do not realy understand "-qscale 2" parameter too :(
> Also yadif and -qscale should be used together?
> > Only what Carl Eugen suggested:
> > "Since it is likely that the input is interlaced, please first try
> -qscale 2 out0.avi to test if this improves quality, then use yadif."
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