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

[Terje J. Hanssen]

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

Terje J. H