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

Chris Caudle chris at chriscaudle.org
Fri Apr 20 07:24:19 PDT 2018

On Wed, April 11, 2018 8:21 am, Chris Caudle wrote:
> And the app is set at 29.97fps? I'm still confused about why ffmpeg is
> flagging the video file as 29.89fps.

I found a useful program called mediainfo available in the Fedora
Original project seems to be here:

CLI and GUI versions available.
The report from mediainfo for  the phone video contains this info on frame

Frame rate mode                          : Variable
Frame rate                               : 29.892 FPS
Minimum frame rate                       : 16.411 FPS
Maximum frame rate                       : 30.344 FPS

I'm not sure how variable frame rate works in h264 encode/decode,
presumably it has to be converted to a consistent frame rate for playback,
but I'm not  sure.
Perhaps that is confusing the video file import, I have only ever worked
with video files with constant frame rate.

I know you said you were purchasing some kind of small video camera, I
have not compared prices lately but it might be useful to see what older
SLR cameras with video capability are selling for on the used market. 
1920x1080 is only around 2M pixels, maybe there are a lot of 2M - 6M pixel
cameras getting sold cheaply because all the photo people want the new 20M
pixel hotness.  DSLR also has the advantage you can switch out for better
or at least more appropriate lenses at some point if you want (telephoto,
wide angle, different aperture capability, etc.).  I guess verify that the
files from a DSLR work like you need first, my wife's SLR doesn't do video
so I can't check with that model.

Chris Caudle

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