[NBLUG/talk] interlace jitter with tovid

[Bob Blick]

Passing the parameter "-interlaced_bf" fixed the video - it forces tovid
to interpret the order of the fields properly as coming from a mini-dv
camcorder - bottom field first. (not) Funny how none of the "DV to DVD"
guides mentioned that.

Unfortunately the audio quit after 23 minutes. There was a dropout on
the original tape, the camcorder got jostled, but for some reason the
transcoding process didn't recover. So I ended up doing the transcoding
under Windows and it worked fine there. Darn. Give it another 5 years.

Cheerful regards,

Bob


Bob Blick wrote:
> Hi Everyone,
> 
> I'm taking video shot on a typical mini-dv camcorder. importing it as
> raw dv to my computer using "dvgrab". Then I'm using "todisc" which uses
> the "tovid" script to make dvd files.
> 
> The resulting DVD is unwatchable whenever there is any motion -
> pulsating shadows and ghosts. I imagine it has to do with some multiples
> of interlacing-deinterlacing and reinterlacing.
> 
> If I view the raw dv files on the computer all is good.
> 
> If I view the intermediate mpg files all is good(these are the files
> that take a long time to create).
> 
> If I view a final VOB file on the computer, the ghosting is there.
> 
> This seems really weird, since the VOB file creation is near the end and
> takes very little time.
> 
> Anyone know the option to hit "tovid" with to make it work right?
> 
> I think that the video starts out from the camcorder interlaced, but
> somewhere in the "tovid" process it gets deinterlaced and then
> reinterlaced. If somehow I could keep it interlaced through the whole
> process it would work properly.