Carl Eugen Hoyos wrote:
MrNice <wxcvbn2006 <at> iol.ie> writes:
When I capture some video with the CL ./ffmpeg -debug 1 -f v4l2 -ts
mono2abs -channel 1 -video_size 720x576 -pix_fmt yuyv422
-thread_queue_size 512 -i /dev/video0 -c:v ffv1 -level 3 -g 1
-aspect 4:3 -pix_fmt yuv422p /Store3/Test/t_`date
+%Y%m%d_%H%M`.mkv -aspect 4:3 -f sdl "Dazzle output"
from a S-VHS tape and Dazzle DVC100, I was thinking to get an
interlaced video file.
Why? I mean: How is FFmpeg (or the FFV1 encoder) supposed to know
that your v4l input is interlaced?
Hopefully the device/v4l would pass on this information.
(And why shouldn't your S-VHS recording be low-resolution
progressive?) Maybe I miss something but in this case please
explain.
I thought s-vhs was like vhs = one field per stripe on the tape.
Maybe if what was recorded was progressive you wouldn't care assuming
v4l outputs weaved frames - but a lot of tape contains interlaced so you
would need the field dominance info for that.
Random thought - as it's analogue field input, I wonder if it's possible
that even with a progressive recorded as interlaced you could end up
with weaved frames that don't "line up".
_______________________________________________
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
http://ffmpeg.org/mailman/listinfo/ffmpeg-user
