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On 2013-07-02 21:28:00, ArsenalFan wrote:
what's the size of 1 minute 4k video?
Edit: I found it
~48 MB
then a 64GB memory can storage only 20 minute 4K video
and more important it needs at least 48MB/s Write speed
but I think some 20 minutes worth it
[ This Message was edited by: ArsenalFan on 2013-07-02 21:46 ]
That means that only internal memories will be able to hold it... Normal MicroSD, Class 10 has generally 10 Mb/s write speeds...
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Posted: 2013-07-02 22:50:05
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On 2013-07-02 21:28:00, ArsenalFan wrote:
what's the size of 1 minute 4k video?
Edit: I found it
~48 MB
then a 64GB memory can storage only 20 minute 4K video
and more important it needs at least 48MB/s Write speed
but I think some 20 minutes worth it
[ This Message was edited by: ArsenalFan on 2013-07-02 21:46 ]
how the heck do you calculate that?
you can shoot about 21 hours with 64 gb!!
and u need into account what bitrate sony will use..
what codec 264 or 265?.ecc..ecc..
[ This Message was edited by: sponse on 2013-07-02 21:55 ]
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Posted: 2013-07-02 22:53:45
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On 2013-07-02 21:28:00, ArsenalFan wrote:
what's the size of 1 minute 4k video?
Edit: I found it
~48 MB
Seems grossly underestimated; can I have a link for that number?
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Posted: 2013-07-02 22:56:13
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On 2013-07-02 22:53:45, sponse wrote:
On 2013-07-02 21:28:00, ArsenalFan wrote:
what's the size of 1 minute 4k video?
Edit: I found it
~48 MB
then a 64GB memory can storage only 20 minute 4K video
and more important it needs at least 48MB/s Write speed
but I think some 20 minutes worth it
[ This Message was edited by: ArsenalFan on 2013-07-02 21:46 ]
how the heck do you calculate that?
you can shoot about 21 hours with 64 gb!!
Impossible. With some calculations I came to the fact that with 64 Gb I can record "only" 10 hours with my S, considering a test I've done before that I've used almost 2 Gb for 20 min of recording. FullHD...
[ This Message was edited by: Felimenta97 on 2013-07-02 22:06 ]
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Posted: 2013-07-02 22:57:01
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uh...
how are you calculating guys?
if 1 minute 4K video = 45MB (assuming best encoding)
then 20 minutes = 20 X 45MB = 900MB or about ~1GB.
a 64GB card would be able to store 20 X 64 = 1280 minutes or 21 HOURS (which seems a little crazy to me).
I looked it up the other day. The current 4K Camcorders come equipped with 32GB cards and store about 2 hours worth of video. I don't recall the type of encoding they use, but that's what you can expect.
Of course, this is taking into account the write speeds are sufficient.
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Posted: 2013-07-02 23:04:24
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On 2013-07-02 23:04:24, moogoo wrote:
uh...
how are you calculating guys?
if 1 minute 4K video = 45MB (assuming best encoding)
then 20 minutes = 20 X 45MB = 900MB or about ~1GB.
a 64GB card would be able to store 20 X 64 = 1280 minutes or 21 HOURS (which seems a little crazy to me).
48MB/minute is an impossible number. Maybe using H.265 but even that's a long shot.
That would make a 2h movie at 4K about 6GB which is even less than blue ray movies.
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Posted: 2013-07-02 23:22:52
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sorry
48MB for 1 sec
other calcs correct
I edited previous post
[ This Message was edited by: ArsenalFan on 2013-07-02 22:35 ]
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Posted: 2013-07-02 23:23:56
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yeap that makes more sense.
here's the info from a JVC 4K Camcorder:
so if honami is capable of h.264 encoding with HDMI output for direct to TV then awesome!
4K Recording: 3,840 x 2,160
MPEG-4 AVC/H.264(.MP4) 4 Stream Separate Recording 60fps/50fps/24fps Progressive at 144Mbps
4K recording for up to 2 hours (32GB SDHC, x4)
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Posted: 2013-07-03 01:18:54
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Question on the still image side of things, a bit off topic but appreciate insights from people more photo literate than I am.
If the sensor has 20MP, what possibilities does it offer in post processing?
I understand that I have more choice to crop the images, but aren't they other advantages?
For instance, does it make a difference for noise reduction, via noise averaging or are they ways to combine pixels in post processing to reduce noise, hence allow shooting at higher ISO?
Anything you know or links is appreciated.
I think it is a bit on topic because if 20mp is a rumored feature now xr5, then the advantages that can be derived from it are also a feature.
Thanks
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Posted: 2013-07-03 02:11:41
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^ of course.. if Nokia can combine 7 to 1 from 38Mpix down to 5Mpix I don't see why you can't do 3 to 1 from a 20Mpix sensor.
just like it does with jpegs, the pixel oversampling helps a lot with the size of the video files. A 1 hour video in identical conditions, especially at night where there is more noise to be cleaned out, would be ~100-300 mb larger on my iPhone 5 than on my 808.
[ This Message was edited by: cu015170 on 2013-07-03 03:16 ]
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Posted: 2013-07-03 04:14:42
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