Has anyone of you encoded video with different video and luminance resolution?
I have such task to do and first time heard about such thing.
Could you please help me
thank you
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Can you perhaps be more specific?
What exactly is the task you need to perform?
Encoding a video which will ultimately have a digital resolution different from that of the luminance resolution is normal. You simply need to calculate what digital resolution to set the encoder to, based off of the luminance resolution. (Or vice versa)
This link may help a little:
http://forums.afterdawn.com/thread_view.cfm/563063
For example: A luminance resolution of 420, equates to 566x480 in today's digital terms. -
To be more specific I have to create 2 videos one with luminance resolution 480x576, second luminance resolution 720x576.
Both movies must have SDTV video resolution (720x576) in h.264/mp4.
Could you please tell me what program I can use to generate such content -
What is your source video? Analog NYSC/PAL? Other?
720x576 as used for DV and DVD uses non-square pixels. 4x3 and 16x9 aspect ratios are supported.
480x576 is non-standard.
Handbrake is one of many programs that allow customized luma resolutions + h.264 encode with mp4 container.
https://trac.handbrake.fr/wiki/HandBrakeGuideRecommends: Kiva.org - Loans that change lives.
http://www.kiva.org/about -
@edDV: I would be interested to know too how you set the luma resolution in Handbrake
With Avisynth, I would so something like this:
Code:source = FFVideoSource("Path to input", threads=1) # loadsource luma = source.GreyScale() # chroma only low = luma.PointResize(480, 576).PointResize(720, 576) # resize to lower luma and resize again to get the same resolution in low&luma # StackHorizontal(luma, low) #to compare # return luma #to get luma only with full luma resolution # return low # to get luma with 480x576 luma resolution
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Thank you Selur
I have made video as you said and generated some video in greyscale. From what I see here http://avisynth.org/mediawiki/GreyScale
I got luma in rec601 format.
Now can I use such luma to generate new video in color (YUV format) ?
How Can I apply modified luma to output video? -
should be possible with http://avisynth.org/mediawiki/MaskTools (or http://avisynth.org/mediawiki/MaskTools2) iirc. never tried to do such a thing.
FitPlane(..) might be a good start,.. -
In the picture menu.
https://trac.handbrake.fr/wiki/PictureSettingsRecommends: Kiva.org - Loans that change lives.
http://www.kiva.org/about -
480 (and others) are perfectly standard or they are a part of recommendation - DVB recommends 352, 480, 528, 544, 704 and 720 horizontal resolutions for SDTV in Europe.
Assuming 13.5MHz sampling thus Nyquist criteria Y bandwidth is for:
720= 13.5MHz/2
704=(704/720)*(13.5/2)=6.6MHz
544=(544/720)*(13.5/2)=5.1MHz
528=(528/720)*(13.5/2)=4.95MHz
480=(480/720)*(13.5/2)=4.5MHz
352=(352/720)*(13.5/2)=3.3MHz
Simplest way is down resize picture with high quality resizer from 720 to 480 (or required resolution) then up sample such video to 720.
If purpose of this is signal measurements then SinC filter is required (or rather mathematically optimal).
I don't know what is purpose of this question - this is comparison of the resizing algorithms and particular implementations or something else? -
Recommends: Kiva.org - Loans that change lives.
http://www.kiva.org/about -
This was my point - not standard in DVD world but standard in SDTV world (ie ATSC and DVB - i assume that 480 is also one of the recommended resolutions by ATSC)
480 is comparable to typical BETACAM studio VCR and S-VHS luminance bandwidth
Yep, sorry if this was unclear -
Recommends: Kiva.org - Loans that change lives.
http://www.kiva.org/about -
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