[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

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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