I have a .dv video of my band playing a gig. I want to crop it a bit so the image just focos on the stage.
I have one question. If a crop it, the final size will not be 4/3. Wil the video be streched when I later send it to iMovieHD and then iDVD to burn a DVD?
If this is going to happen. How can I instead of crop, just add black bars to remove the unwanted borders but keep the 4/3 image ratio?
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Suddenly I have see the light.
I have used VisualHub.
In Advanced window I have set the desired croping. Then I have set the size as:
New Height = 720-uppercrop-bottomcrop
New Width = 576-leftcrop-rightcrop
So the movie will not be streched
Then I export as dv file. The output will be a 4/3 (720*576) file with black borders.
It is posible also to remove the upper or side black borders (the ones with less croping).
In my case I have remove few in the sides so I did the following divison:
576 / New-Width
and use it to calculate the FinalHeight without changing any image ratio.
FinalWidth: 576
FinalHeight: NewHeight * (576 / New-Width)
I'm sorry, this easy task looks so complicates in my explanatios.
Maybe I'n reinventing the wheel and there is a reaaly simple way of doing this, please tell me. -
ouch! too complex and unsafe (use the QuickTime decoder to deinterlace first or your resulting file/interlacing will be damaged)
command line:
ffmpeg -f dv -i input.dv -croptop (yourValue1 as integer) -cropbottom (yourValue2 as integer) -cropleft (yourValue3 as integer) -cropright (yourValue4 as integer) -padtop ((yourValue1+ yourValue2)/2, had to be an even value as integer) -padbottom (same value than padtop) -padleft ((yourValue3+ yourValue4)/2, had to be an even value as integer) -padright (same value than padleft) -ar 48000 -y ~/Desktop/output.dv
this seems complex, it's not
eg (complex crop, with centerd result):
ffmpeg -f dv -i input.dv -croptop 10 -cropbottom 50 -cropleft 30 -cropright 50 -padtop 30 -padbottom 30 -padleft 30 -padright 30 -ar 48000 -y ~/Desktop/output.dv
eg (simple "replace areas with black"):
ffmpeg -f dv -i input.dv -croptop 10 -cropbottom 10 -cropleft 10 -cropright 10 -padtop 10 -padbottom 10 -padleft 10 -padright 10 -ar 48000 -y ~/Desktop/output.dv
PS: or contact me by mail
bye
Edit: command line correctionFor DVD, iPad, HD, connected TV, … iMovie & FCPX? MovieConverter-Studio 3 (01/24/2015) - Handle your camcorder's videos? even in 60p or 60i? do a slow-motion? MovieCam. -
Thanks one more time Herve.
But as always when I try to play around with video, every answer open more questions.
1.- What you mean it is not a safe workflow? What are the dangers?
2.- If the final output will be DVD, is it a good idea to deinterlace it first?
3.- Do you mean that if I use the VisualHub workflow I should check the deinterlace box and choose force Quicktime encoder?
4.- Or do I always deinterlace, even using ffmpeg workflow?
5.- I have never used ffmpeg, I have tryed adding some flags to the VisualHub Advanced Window but it seems not working. So I now learning how to install ffmpeg (not an easy task). I will post when I get some result. -
Originally Posted by DavidCasillas
2.- If the final output will be DVD, is it a good idea to deinterlace it first?
3.- Do you mean that if I use the VisualHub workflow I should check the deinterlace box and choose force Quicktime encoder?
but QuickTime decoding inside VisualHub always deinterlace (it's a bug of the decoding tool)
4.- Or do I always deinterlace, even using ffmpeg workflow?
Some deinterlacers are better (but not these ones)
Directly take the one installed on your disk with my app (home folder /Library/Application Support/MovieConverter )
byeFor DVD, iPad, HD, connected TV, … iMovie & FCPX? MovieConverter-Studio 3 (01/24/2015) - Handle your camcorder's videos? even in 60p or 60i? do a slow-motion? MovieCam. -
I have tried and get an error: Unknown input or output format: pal-dv
I have search but could not get an answer of what is going wrong. Here is the terminal screen.
macbook-de-david-casillas-rivero:~ davidcasillasrivero$ ~/Desktop/ffmpeg -f dv -i ~/Desktop/input.dv -croptop 10 -cropbottom 10 -cropleft 10 -cropright 10 -padtop 10 -padbottom 10 -padleft 10 -padright 10 -f pal-dv -y ~/Desktop/output.dv
FFmpeg version SVN-r16722, Copyright (c) 2000-2009 Fabrice Bellard, et al.
configuration: --enable-postproc --enable-gpl --enable-pthreads --enable-static --disable-shared --enable-gray --enable-libx264 --enable-libmp3lame --enable-libgsm --enable-libfaac --enable-libfaad --enable-swscale --enable-avfilter --disable-decoder=aac
libavutil 49.14. 0 / 49.14. 0
libavcodec 52.11. 0 / 52.11. 0
libavformat 52.25. 0 / 52.25. 0
libavdevice 52. 1. 0 / 52. 1. 0
libavfilter 0. 2. 0 / 0. 2. 0
libswscale 0. 6. 1 / 0. 6. 1
libpostproc 51. 2. 0 / 51. 2. 0
built on Jan 25 2009 19:10:33, gcc: 4.0.1 (Apple Computer, Inc. build 5370)
Input #0, dv, from '/Users/davidcasillasrivero/Desktop/input.dv':
Duration: 00:00:20.16, start: 0.000000, bitrate: 28800 kb/s
Stream #0.0: Video: dvvideo, yuv420p, 720x576, 28800 kb/s, PAR 59:54 DAR 295:216, 25.00 fps(r)
Stream #0.1: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
Unknown input or output format: pal-dv -
'cause I made a mistake (I said "-f" instead of "-target")
sorry
(I modified the command line in the previous post, and added one parameter more)
byeFor DVD, iPad, HD, connected TV, … iMovie & FCPX? MovieConverter-Studio 3 (01/24/2015) - Handle your camcorder's videos? even in 60p or 60i? do a slow-motion? MovieCam.
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