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Enthusiast
Posts: 8
Registered: ‎12-05-2017
Message 1 of 10 (1,253 Views)
Accepted Solution

FDR x1000v settings for best (non 4k) resolution

Hello,

 

Which of these settings should give the best resolution when played back on a 1920 x1080 pc screen? 

 

XAVC-s: 1080 120p 100 M

 

MP4: 1080 60p PS

 

 

(In both cases using the same micro SD UHS-I class 10 U3 card) 

 

Thank you

Expert
Posts: 1,107
Registered: ‎11-02-2015
Message 2 of 10 (1,238 Views)

Re: FDR x1000v settings for best (non 4k) resolution

XAVC-S 1080p 30fps with 50Mbit/s.

Both 1080p 60fps 50Mbit/s and 1080p 120fps 100Mbit/s give the same quality per video frame.

Simply divide the bitrate trough the fps to get the 'real time quality'. The higher the number, the better.

1080p 30fps 50Mbit/s: 50Mbit

1080p 60fps 50Mbit/s: 25Mbit

1080p 120fps 100Mbit/s: 25Mbit

1080p 60fps 28Mbit/s (MP4): 14Mbit

1080p 30fps 28Mbit/s (MP4): 28Mbit

- Nic

Enthusiast
Posts: 8
Registered: ‎12-05-2017
Message 3 of 10 (1,230 Views)

Re: FDR x1000v settings for best (non 4k) resolution

Thanks Nic,

 

That's strange...when I tested XAVC-s versus MP4 using the stated settings the quality was significantly worse for the XAVC-s recording. Both recordings were of the same subject and recorded within a few minutes of each other, yet the XAVC-s recording was noticeably fuzzier.

 

Thanks

 

Adrian

Enthusiast
Posts: 8
Registered: ‎12-05-2017
Message 4 of 10 (1,229 Views)

Re: FDR x1000v settings for best (non 4k) resolution

Sorry I meant to add that I did the test about 30 mins before sunset so under low lighting conditions. Is this an issue for XAVC-s?

Expert
Posts: 1,107
Registered: ‎11-02-2015
Message 5 of 10 (1,222 Views)

Re: FDR x1000v settings for best (non 4k) resolution

You tested 120fps against 60fps.

120fps means you will get half the light per frame, so the quality will be worse no matter how high the bitrate is.

Never test different framerates against each other (most importantly not in bad lighting conditions) - otherwise your test won't be meaningful in any way.
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Enthusiast
Posts: 8
Registered: ‎12-05-2017
Message 6 of 10 (1,189 Views)

Re: FDR x1000v settings for best (non 4k) resolution

Now I'm confused...

 

My initial question was "Which of these settings should give the best resolution when played back on a 1920 x1080 pc screen?". 

 

Your first reply suggested that there should be no difference between the two, but your last reply suggests the MP4 option should look better.

 

Can you please clarify?

 

Thanks!

 

Adrian

Expert
Posts: 1,107
Registered: ‎11-02-2015
Message 7 of 10 (1,153 Views)

Re: FDR x1000v settings for best (non 4k) resolution

In your initial question you asked for best quality in terms of resolution/clarity/detail.

 

The highest "real time quality" gives you that - for 1080p that is XAVC-S 30fps 50Mbit/s.

 

 

Your "test" was performed with different frame-rates and therefore the camera exposed differently.

 

The "lowest" possible exposure (the higher the number, the lower/shorter is the exposure) for each recording mode is the framerate.

 

If there is little to no light, a camera needs to expose longer, to get enough light to the sensor in order to reduce digital noise (aka. "grain" or fuzziness).

 

If you record with 120fps the camera can expose no longer than 1/120th of a second per frame.

 

Even if the "real time quality" for this mode (1080p 120fps 100Mbit/s = 25Mbit/s) is higher than the "real time quality" for the 1080p 60fps 28Mbit/s (MP4) mode (=14Mbit/s), you can cheat physics. In this mode twice the amount of light hits the sensor, so it will look better than the 120fps 100Mbit/s mode.

 

If you compare video modes during certain (bad) lighting conditions, you can only compare similar framerates, otherwise your test is nonsense.

 

- Nic

Enthusiast
Posts: 8
Registered: ‎12-05-2017
Message 8 of 10 (1,136 Views)

Re: FDR x1000v settings for best (non 4k) resolution

Thanks Nic.

 

I was comparing different frame rates because I was comparing the highest frame rate available for MP4 with the highest frame rate available for XAVC-S in this camera. I had (wrongly) assumed that in general a higher frame rate meant a better looking picture but it seems you are saying the exact opposite and I see how that makes sense. (I suppose a higher frame rate is only beneficial if you want to do slow motion playback?)

 

Anyway, what I really wanted to know was "what settings do I need to get the best looking video from this camera, not using 4K". It seems you are saying it would be XAVC-S 30fps 50Mbit/s as this gives the highest "real time quality".

 

Thanks

 

Adrian

 

 

 

Expert
Posts: 1,107
Registered: ‎11-02-2015
Message 9 of 10 (1,134 Views)

Re: FDR x1000v settings for best (non 4k) resolution

Yes, that is what I meant Smiley Happy

- Nic
Expert
Posts: 166
Registered: ‎05-27-2017
Message 10 of 10 (1,098 Views)

Re: FDR x1000v settings for best (non 4k) resolution


TheBlob wrote:

Thanks Nic.

 

I was comparing different frame rates because I was comparing the highest frame rate available for MP4 with the highest frame rate available for XAVC-S in this camera. I had (wrongly) assumed that in general a higher frame rate meant a better looking picture but it seems you are saying the exact opposite and I see how that makes sense. (I suppose a higher frame rate is only beneficial if you want to do slow motion playback?)

 

Anyway, what I really wanted to know was "what settings do I need to get the best looking video from this camera, not using 4K". It seems you are saying it would be XAVC-S 30fps 50Mbit/s as this gives the highest "real time quality".

 

 


 

Yes, 120fps better for slow motion,but you need to have a good light source.  

 

I switched over to 60fps from 30fps recently.  I like how everything is smoother on playback.  For me in my situation - it performs about the same in low/no light.  I do end up with about 1 hour 35 minutes record time instead of near 1 hour 45 minutes.  File size is the same.

 

 

 

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