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  #16  
Old March 1st 19, 02:59 PM posted to microsoft.public.windowsxp.general
Shadow
external usenet poster
 
Posts: 1,638
Default screenshot resolution

On Fri, 1 Mar 2019 13:49:54 +0000, "J. P. Gilliver (John)"
wrote:

In message , Shadow
writes:
On Tue, 26 Feb 2019 13:31:10 -0500, BillAhearn
wrote:

If I press print screen when a video is playing at any given resolution,
do I gain resolution by going full screen and then pressing print screen?


Use VLC and take snapshots with the hotkey.
[]'s

[]
WHY do people not READ what someone says?

He has clearly said, several times, that he's talking about using the
video player functionality of various websites, such as YouTube, and is
_not_ interested in downloading the videos.


I was scrolling down, and noticed the question. He didn't
state that.
Call me lazy, or something for not reading all the follow-ups.
Or maybe he should have made a more concise question.
I ALWAYS download videos at 480p before watching them. Then
delete, if it's trash, or re-download at a higher resolution if it's a
keeper.
[]'s
--
Don't be evil - Google 2004
We have a new policy - Google 2012
Nineteen Eighty-Four was a work of FICTION !!!! - Orwell

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  #17  
Old March 2nd 19, 12:46 AM posted to microsoft.public.windowsxp.general
Paul[_32_]
external usenet poster
 
Posts: 11,873
Default screenshot resolution

J. P. Gilliver (John) wrote:
In message , Shadow
writes:
On Tue, 26 Feb 2019 13:31:10 -0500, BillAhearn
wrote:

If I press print screen when a video is playing at any given resolution,
do I gain resolution by going full screen and then pressing print
screen?


Use VLC and take snapshots with the hotkey.
[]'s

[]
WHY do people not READ what someone says?

He has clearly said, several times, that he's talking about using the
video player functionality of various websites, such as YouTube, and is
_not_ interested in downloading the videos.


Downloading videos is for *research purposes*.

Using carefully controlled conditions on your own
desktop, you can observe what things do and do not
give extra resolution.

Once you *understand* what is happening, you can
use any method you want.

You cannot take screenshots of Flash videos where the
Flash plugin is using "Hardware Acceleration". The
same can happen in VLC (if it uses hardware acceleration,
the movie frames are in the wrong plane). If the
browser has native video support (like Ogg/Theora
perhaps), again, there can be various attempts at
acceleration which defeat PrtScn.

So PrtScn is not a panacea. FRAPS can "record anything",
but, it costs money. Various other tools may record
from one of three planes, but FRAPS is the only
one that offers all three planes of coverage when
recording.

You can also record your screen with a hardware
capture card, which takes some of the protections
out of the picture. If the software makes a concerted
effort to use HDCP, then you could be denied capture
with a capture card.

*******

This is why *downloading* the movie, helps...

No matter what the OP posts, we can *still* offer
hard-earned advice!

Paul
  #18  
Old March 2nd 19, 03:59 AM posted to microsoft.public.windowsxp.general
J. P. Gilliver (John)[_4_]
external usenet poster
 
Posts: 2,679
Default screenshot resolution

In message , Paul
writes:
J. P. Gilliver (John) wrote:
In message , Shadow
writes:
On Tue, 26 Feb 2019 13:31:10 -0500, BillAhearn
wrote:

If I press print screen when a video is playing at any given resolution,
do I gain resolution by going full screen and then pressing print
screen?

Use VLC and take snapshots with the hotkey.
[]'s

[]
WHY do people not READ what someone says?
He has clearly said, several times, that he's talking about using
the video player functionality of various websites, such as YouTube,
and is _not_ interested in downloading the videos.


Downloading videos is for *research purposes*.


Yes, but I think you're researching things the OP isn't interested in!
[]
You cannot take screenshots of Flash videos where the
Flash plugin is using "Hardware Acceleration". The
same can happen in VLC (if it uses hardware acceleration,
the movie frames are in the wrong plane). If the
browser has native video support (like Ogg/Theora
perhaps), again, there can be various attempts at
acceleration which defeat PrtScn.


Yes, there are lots of reasons why PrtScn won't work. But, for the OP,
it _is_ working, so I doubt he's that interested in the cases where it
won't!
[]
You can also record your screen with a hardware
capture card, which takes some of the protections
out of the picture. If the software makes a concerted
effort to use HDCP, then you could be denied capture
with a capture card.

Again, far more complexity than the OP - as I read it - is interested in
doing.
*******

This is why *downloading* the movie, helps...

No matter what the OP posts, we can *still* offer
hard-earned advice!


Yes, but we can also get carried away, into answering in far more depth
than the OP has any intention of going. Sure, sometimes doing so can
extend what he that shall be nameless used to call "tribal knowledge",
but equally it can drive people away.

Paul

John
--
J. P. Gilliver. UMRA: 1960/1985 MB++G()AL-IS-Ch++(p)Ar@T+H+Sh0!:`)DNAf

.... of the two little boxes in the corner of your room, the one without the
pictures is the one that opens the mind. - Stuart Maconie in Radio Times,
2008/10/11-17
  #19  
Old March 2nd 19, 01:55 PM posted to microsoft.public.windowsxp.general
J. P. Gilliver (John)[_7_]
external usenet poster
 
Posts: 603
Default screenshot resolution

In message , BillAhearn
writes:
On Thu, 28 Feb 2019 08:22:09 +0000, wrote:

In message , BillAhearn
writes:
[]
It is correct I am only viewing the web videos in a browser using whatever
viewer the web browser uses at whatever resolution the video is which is
usually pretty bad.

[]
I take about two snapshots per video using the print screen button (alt
print screen worked too) where there there are hundreds of these videos

[]
and I don't want to spend the time to download every video since I don't
need the video once I take the snapshot.

[]
Then I crop the snapshot with any editor where the crop is an odd shape for
each snapshot and then I add backgrounds and filters and effects using
photoshop or fotosketcher.

The crop is never a simple shape like an on axis ellipse or rectangle which
is why I need the whole image first before I crop it, where I sometimes use
the magic wand to begin the cropping of areas.


Well, it probably _is_ worth your while just doing a test capture/crop
or two where you _do_ just crop to the rectangle the video occupies in
the browser when you're not viewing full screen, just so you can
_compare_ the resultant image with the same one viewed full screen.

[]
Since the original snapshot is so bad in resolution it's hard to tell if
the full screen is any different than the normal sized video in the browser
in resolution.

[]
I loved that video which is designed for test screenshots!
https://www.youtube.com/watch?v=KSFgolB7HHE


Well, it isn't _designed_ for that purpose! It's just a collection of TV
test cards.

I had to turn off the sound though which you'll know why!
My monitor is 1680x1050 and an normal final result is 845x904.


You mean, after you've done a PrtScn from normal browser and cropped to
the size of the rectangle the video part occupies, it comes out at
845×904? That's more than most of the videos I _suspect_ you'll be
copying from (though wouldn't for the test card one as that's 1280×720).

How can I upload the test screenshots to you?


Put them on any picture-sharing site, or your own website, and post the
relevant URL. But really, I wanted _you_ to check: capture (from the
same test card, obviously) in both full-screen and not, and look at the
various gratings in the images; note which gratings you can see the
individual black and white lines, and which just look like a grey block.
Look at your full-screen and not-full-screen captured images at the same
size (such as full screen): do you get more gratings and fewer grey
blocks in the full-screen capture? If so, it's worth doing (for that
video anyway); if not, it isn't. Tell us what you decide.
--
J. P. Gilliver. UMRA: 1960/1985 MB++G()AL-IS-Ch++(p)Ar@T+H+Sh0!:`)DNAf

I long for the commercialised Christmas of the 1970s. It's got so religious
now, it's lost its true meaning. - Mike [{at}ostic.demon.co.uk], 2003-12-24
  #20  
Old March 2nd 19, 05:11 PM posted to microsoft.public.windowsxp.general
Paul[_32_]
external usenet poster
 
Posts: 11,873
Default screenshot resolution

J. P. Gilliver (John) wrote:
In message , BillAhearn


I loved that video which is designed for test screenshots!
https://www.youtube.com/watch?v=KSFgolB7HHE


Well, it isn't _designed_ for that purpose! It's just a collection of TV
test cards.

I had to turn off the sound though which you'll know why!
My monitor is 1680x1050 and an normal final result is 845x904.


You mean, after you've done a PrtScn from normal browser and cropped to
the size of the rectangle the video part occupies, it comes out at
845×904? That's more than most of the videos I _suspect_ you'll be
copying from (though wouldn't for the test card one as that's 1280×720).

How can I upload the test screenshots to you?


Put them on any picture-sharing site, or your own website, and post the
relevant URL. But really, I wanted _you_ to check: capture (from the
same test card, obviously) in both full-screen and not, and look at the
various gratings in the images; note which gratings you can see the
individual black and white lines, and which just look like a grey block.
Look at your full-screen and not-full-screen captured images at the same
size (such as full screen): do you get more gratings and fewer grey
blocks in the full-screen capture? If so, it's worth doing (for that
video anyway); if not, it isn't. Tell us what you decide.


A video presented like this, has low resolution to begin with. Resizing
to 1680x1050 doesn't give any extra information to work with. The video is
smaller than the screen, and full screen won't help the actual results.

160 mp4 256x144 DASH video 108k , avc1.4d400b, 25fps, video only

Whereas this one, being "larger" than the OPs screen, can profitably
be resized to full screen before PRTSCN. There is "resolution to be
harvested", so making the video display full screen at 1680x1050
is helping.

137 mp4 1920x1080 DASH video 5093k , avc1.640028, 25fps, video only

Youtube would normally present in some "best" format, which
isn't actually maximum resolution, but includes both video and sound.

22 mp4 1280x720 hd720 , avc1.64001F, mp4a.40.2@192k (best)

If that one was shown at 1280x720, you're getting all the pixels,
and making it larger than that (1680x1050) isn't really helping
all that much.

If right-clicking on an Adobe Flash video, the "Stats for Nerds"
option may show the native resolution of the video. I don't know
if HTML5 based videos have "Stats for Nerds" as an available feature
or not. Youtube prefers HTML5 today, and it may be harder to
convince them to use FLV (flash) instead.

Paul
 




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