[Ardour-Users] "Extract LTC from audio and align video" menu option missing from "Transcode/Import Video file" popup

David Kastrup dak at gnu.org
Wed Apr 11 08:37:15 PDT 2018


robertlazarski <robertlazarski at gmail.com> writes:

> On Wed, Apr 11, 2018 at 7:21 AM, Chris Caudle <chris at chriscaudle.org> wrote:
>
>> On Mon, April 9, 2018 10:18 pm, robertlazarski wrote:
>> > I confirmed that too, in the process I learned what "drop frames" are and
>> > what they do.
>>
>> Yeah, I realized I only partially understood how drop frame timecode
>> works, so I had to spend some time going through the details.
>> The ATSC standard used for digital TV broadcast in the US and some Asian
>> countries calls out 30fps and 29.97fps, I was hoping that everyone would
>> just switch to straight 30fps and drop frame would go away, but I guess
>> during the transition period from analog to digital broadcasts they went
>> with 29.97002997002997... for compatibility, and then just never switched.
>>  We're stuck with it forever probably.
>>
>>
> For a music performance video that does post through Ardour and ends up on
> youtube or whatever ... In your opinion, should I use or not use drop
> frames? I'm sort of doing "option bingo" right now :-) .

Disclaimer: I am not a professional video producer by far.  That being
said:

Drop frames really only make sense in connection with NTSC color
modulation.  Do you expect your material to be broadcast on analog TV?
I'd not bother.

-- 
David Kastrup



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