[Cin] offtopic: Digitize and record Video with A/D USB adapters

[Dominique Michel]

Le Tue, 12 Oct 2021 00:09:38 +0200,
"Terje J. Hanssen via Cin" <cin at lists.cinelerra-gg.org> a écrit :

> Den 11.10.2021 22:28, skrev Dominique Michel via Cin:
> > Le Mon, 11 Oct 2021 18:41:35 +0200,
> > "Terje J. Hanssen via Cin" <cin at lists.cinelerra-gg.org> a écrit :
> >  
> >> Mat and all
> >>
> >> I take a follow-up included below:
> >>
> >> Den 25.09.2021 20:47, skrev mnieuw--- via Cin:  
> >>> Hi Terje,
> >>> I have used a cheap chinese USB video grabber to digitise VHS.
> >>> But I cannot remember the type.
> >>> I used VLC, which worked fine, but OBS should also work. I had
> >>> loaned the grabber, and have not tested if Cinelerra-GG could use
> >>> it directly. I cannot remember if video and audio showed up as two
> >>> different devices or not. If the audio is not a separate device,
> >>> then I doubt Audacity can record with it.  
> > Hi,
> > On linux, you can use mencoder to grab audio + video and specify
> > any video input and output file and format you want to use. It is
> > much more easier to use than ffmpeg. Something like:
> >
> > DSVID="/dev/video0"
> > NORM="PAL-BG"
> > SVID="2" # the input on the video device
> > ALSA_SVID="hw.1" # the ALSA card
> > RATE="48000" # [Hz] same than the sound card for best quality
> > WIDTH="634" # must be divisible by 16
> > HEIGHT="472" # must be divisible by 16
> > VRATE="4500" # [kbits] between 4 (small file) and 16000 (big file)
> > CROPED_WIDTH="628" # must be divisible by 16 or 4
> > CROPED_HEIGHT="448" # must be divisible by 16 or 4
> > CROPED_X="6"
> > CROPED_Y="16"
> > F_SV_REC="/home/dom/movie.avi"
> >
> > mencoder tv:// -tv
> > driver=v4l2:device=$DSVID:norm=$NORM:input=$SVID:alsa:adevice=$ALSA_SVID:audiorate=$RATE:width=$WIDTH:height=$HEIGHT
> > -mc 0 -noskip -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=$VRATE -vf
> > crop=$CROPED_WIDTH:$CROPED_HEIGHT:$CROPED_X:$CROPED_Y,pp=lb -oac
> > mp3lame -lameopts cbr:br=64 -o $F_SV_REC"
> >
> > For the video quality of VHS, if the player or the video camera
> > have a s-video output, and the video card a s-video input, the
> > final record will be better than with "standard" VHS quality.
> >
> > Cheers,
> > Dominique  
> 
> Interesting about Mencoder, but sorry - there is no S-Video IN port
> on my video card
> 
> inxi -Fzx | grep Graphics
> Graphics:  Device-1: NVIDIA GK208B [GeForce GT 730] vendor: ASUSTeK 
> driver: nouveau v: kernel bus ID: 01:00.0

This is your video output port, not the input one.
> 
> Terje J. H
>