240FPS 720P - for real?

[roeiz]

from the few videos i took on this slow motion mode,
i'm not quite sure i'm convinced the 6s plus really does 240 fps in REAL 720p..
i know what 720p should look like,
and it really looks lower quality than that..

anyone noticed? checked this? did some tests?

thanks.

 

[jermy4]

My guess is that it's probably a lower bitrate to be able to capture 240fps. 720p is really just a resolution.

 

[roeiz]

My guess is that it's probably a lower bitrate to be able to capture 240fps. 720p is really just a resolution.

so what you say the lower bitrate makes it a "low grade" 720P, right?
opposed to a "normal" 720p video with high bit rate tha looks MUCH better..
bummer.

 

[jermy4]

That is my guess, you could take a 720p video and a slo mo 720p video and compare the video bitrates to see if I'm right.

 

[Newtons Apple]

I would think that without good lighting 240fps would have the sensor ISO cranked way up and that would cause poor image quality.

 

[roeiz]

I would think that without good lighting 240fps would have the sensor ISO cranked way up and that would cause poor image quality.

i think you might be right.
i've done more videos at darker conditions and it's even worse..

 

[cbrand493]

I would think that without good lighting 240fps would have the sensor ISO cranked way up and that would cause poor image quality.

That would cause noise though, not poor quality (low resolution). I think it's more the bit rate than the ISO.

 

[CNeufeld]

from the few videos i took on this slow motion mode,
i'm not quite sure i'm convinced the 6s plus really does 240 fps in REAL 720p..
i know what 720p should look like,
and it really looks lower quality than that..

anyone noticed? checked this? did some tests?

thanks.

Can't you download the video to a computer and use some of the software that's readily available to view the details on it?

C

 

[roeiz]

Can't you download the video to a computer and use some of the software that's readily available to view the details on it?

C

Video
ID : 2
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3.1
Format settings, CABAC : Yes
Format settings, ReFrames : 2 frames
Format settings, GOP : M=2, N=90
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 1mn 16s
Source duration : 1mn 16s
Bit rate : 3 362 Kbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 29.908 fps
Minimum frame rate : 3.750 fps
Maximum frame rate : 30.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.122
Stream size : 30.6 MiB (97%)
Source stream size : 30.6 MiB (97%)

funny it says max frame rate 30fps, but it playes it at 240fps..

 

[geoff5093]

That would cause noise though, not poor quality (low resolution). I think it's more the bit rate than the ISO.

Right, but a higher ISO means a worse looking image/video.

 

[Newtons Apple]

i think you might be right.
i've done more videos at darker conditions and it's even worse..

Have you tried doing a video in very good light?

 

[roeiz]

Have you tried doing a video in very good light?

well not really

but i expected more decent results in not a full daylight environment tbh.

 

[Newtons Apple]

well not really

but i expected more decent results in not a full daylight environment tbh.

might be expecting a little too much but I hope you get it worked out.

 

[Mercenary]

It's because to shoot at 240fps it has to use a really high frame rate of 480 vs the usual 60. This means it has to use a really high iso to compensate OR you flood the scene with light. And knowing most people your probably filming in a room with next to no light.

When I say flood with light I'm talking about bright sunlight.

 

[roeiz]

It's because to shoot at 240fps it has to use a really high frame rate of 480 vs the usual 60. This means it has to use a really high iso to compensate OR you flood the scene with light. And knowing most people your probably filming in a room with next to no light.

When I say flood with light I'm talking about bright sunlight.

well if it was really only high iso then it was just more noisy.
but it's not just that. the picture is very unsharp, and pixelated, almost like 480P res.
so i think low light also makes the hidden artifacts more pronounced.
also, a limited bitrate also has something to do with it.

 

[m.level]

Bit rate is really low