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Capture and Converting oddities with Linux
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krisbee
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Joined: 19 Sep 2005
Location: North Carolina, USA
Post Posted: May 24, 2008 09:08 Posts Comp View users profile Send private message Reply with quote
Ok, I finally after months of trying was able to capture with my Saa7134 card/driver (cheapie $20 job) with audio and video in sync, only with mencoder.

Here is what I use:
Code:
mencoder -oac mp3lame -ovc lavc -lameopts mode=1:vbr=2:q=4 -lavcopts vcodec=mjpeg -tv driver=v4l2:norm=ntsc:channel=3:adevice=/dev/dsp:amode=1:width=640:height=480 -af volume=-20 -o tv.avi tv://



However, it seems that my card flips the fields. The only way that seems to make it look good on the tv is to deinterlace.
Here is what I use to convert it into a DVD format. I edit this then with avidemux, just copying. Seems to work

Code:
mencoder -oac lavc -ovc lavc -of mpeg -mpegopts format=dvd:tsaf -vf pp=li/ha/va/dr,hqdn3d,scale=720:480,harddup -srate 48000 -af lavcresample=48000 -lavcopts vcodec=mpeg2video:vrc_buf_size=1835:vrc_maxrate=9800:vbitrate=5000:keyint=18:vstrict=0:acodec=ac3:abitrate=192:aspect=4/3 -ofps 30000/1001 -o


Now, the only thing is that video seems to have a "film" look now, which isn't bad, but it isn't what I expected. Having audio in sync was priority one. Non-Jittery video was priority two.

Is it because of using the linear interpolation to deinterlace? Should I use something else? I tried a few ways to flip the fields, but nothing seemed to work, and it seemed like to much trouble for VHS...

Any suggestions?

Thanks in advance!
Kris

krisbee
Member


Joined: 19 Sep 2005
Location: North Carolina, USA
Post Posted: May 30, 2008 16:23 Posts Comp View users profile Send private message Reply with quote
No ideas?

freebird73717
Member


Joined: 09 Dec 2003
Location: Buckle of the Bible Belt
Post Posted: May 30, 2008 17:13 Posts Comp View users profile Send private message Reply with quote
While it isn't a linux app you might try restream. It can easily change the field order. Useful in situations like yours. I used to use it a long time ago when an Ati card I had capped bottom field first. I used restream to set the stream to tff. IIRC it only works on elementary video streams so you will have to demux first.

I haven't tried it myself but you might try installing it through wine. It's worth a shot.
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