[MEncoder-users] record with mencoder

[Stefan Sassenberg]

mierda tuti schrieb:
> Hello,
> 
> Thanks Stefan.
> 
> Whell I have an hauppauge wintv-nota-t-stick and ubuntu  and I would like to
> record the signtal tv. I would like that for example, if the recording has
> aprox. 2 hours, the size of the file will have about 700mb, and the file
> will be an avi with xvid or divx.
> 
> How could I do this with mencoder, what command must I use?
> 
> Many thanks and sorry for my english!

No need to be sorry, your english is not worse than mine :-)

Ok, let's start with the ~/.mplayer/mencoder. Here's mine:

ds9 bin # cat ~/.mplayer/mencoder
# Write your default config options here!
#outfmt=yuy2
tv:device=/dev/video0
tv:driver=v4l2
tv:width=768
tv:height=576
tv:fps=25
#tv:input=0
#tv:norm=PAL
tv:channels=E10-ARD,E8-ZDF,E6-RBB,SE18-mdr,S24-BR,S22-WDR,E9-SAT.1,E11-RTL,SE13-RTL_II,S21-Super_RTL,SE20-PRO7,SE6-KABEL1,SE11-VOX,SE17-NDR,22-Eurosport,S23-DSF,21-MTV,29-MTV_II/9Live,26-VIVA,24-Comedy_Central,25-terranova,SE9-3sat,SE15-Kinderkanal,SE4-arte,E7-Phoenix,SE7-tvBerlin,SE16-FAB,33-EuroNews/Tele5,S25-N24,SE19-Nick,SE5-ntv,S35-XXP,SE14-BBC_World,SE12-CNN,SE8-OKB,SE10-Mischkanal,E5-HSE,E12-QVC,23-TD1,28-DasVierte,30-123tv,31-K1010,32-TV5
tv:chanlist=europe-west
tv:saturation=-40

Of course, you have to adopt it to your device names, channel list and 
names, and the saturation may not fit to your signal. You can then use 
the file for ~/.mplayer/config as well and try watching tv with
mplayer tv://<channel number>

If that works, you can start recording:
mencoder tv://$channel_number -ovc lavc -lavcopts 
vcodec=mpeg4:vbitrate=$VBITRATE:vhq:keyint=100 -oac mp3lame -lameopts 
vbr=0 -o OUT_PATH/NAME.avi

You have to set the VBITRATE to a value depending on the recording time. 
  If you want to get 100 minutes into a 700MB file:
(700 * 1e6 * 8)/(100 * 60)/1000=933
If you subtract 128 kBit/s for audio, you get ~800 kBit/s as your video 
bitrate. Try it to see if it works to get not more than 700 MB and if 
the result fits your quality needs. If not, we can search for optimizations.

Stefan