Media Video Properties; Samsung J6

eldred wrote on 6/5/2017, 11:57 PM

I'm testing footage taken with my Samsung J6 (a Christmas gift).

In; Project Properties> Match Media Video Settings, I load the .mp4 file and Template: reads as Custom (1920x1080, 29.970 fps) but the Frame rate: reads as 30.013.

I changed the Frame rate: value as 29.970 NTSC and loaded the file into the timeline. Now in the pre-view window, the Project: reads as (bottom left corner) 1920x1080x32, 30.013p.

With the file in the timeline, clicking on Project Video Properties (top left corner) again in the Preview windows; Template: and Frame rate: now reads 30.013.

I rendered the file as XAVC S HD 1080 Long-GOP 29.970p and it looks normal in Windows media viewer.

Why is there a difference of values? Windows Viewer reads it as 30fps before render. After render, the Windows Media reads it as 29fps

Comments

EricLNZ wrote on 6/6/2017, 12:10 AM

Your Samsung is presumably an Android phone in which case the frame rate is variable. 30.013 is probably an average.

eldred wrote on 6/6/2017, 12:16 AM

Thank you for confirming my hunch. I get confused when clips under different lighting conditions have a different frame rate and I am not getting it right. This is normal for Android phones?

eldred wrote on 6/6/2017, 12:33 AM

Ha ha ha ha... I have been on manual on my cams for so long that I forgot what is auto 😆. Okay, I finally figured it out. Thanks EricLNZ

set wrote on 6/7/2017, 5:00 AM

Another Android phone user here: Asus Zenfone 3 Laser & (older) Meizu M2 Note.

Yes, the frame rate does weird. But I better set it as 29.97 for easy, and disable resample it to prevent blur.

eldred wrote on 6/7/2017, 10:51 PM

I am very new to phone footage as I never though that it could have CV but that's really incorrect and I have corrected my opinion and would like to add the handphone to my list of tools.

I shot a couple of footages under different light conditions to evaluate video quality. I get 29.872:29.872, 30.012:30.012, 29.970:29.963, 29.970:30.014. I take that VFR varies...

Example

29.872 to 29.872 which means (?) frame rate is constant?

And 29.970 to 29.963 means the VFR is within this value?

Interestingly, a clip shot in the dark shows an above VFR 30, I had expected it to dip to compensate for the lack of available light.

The 29.872:29.872 clip was quite smooth but shutter speed looks quite slow (if handphone technology uses shutter speeds...?). VP13 were able to render all four clips (29.97) but the other three clips had artifacts and were choppy in parts of the clips. I supposed that was due to change in FR. I tried rendering at 30 but quality was choppy and had artifacts too.

Remut through Handbrake didn't improve quality and that showed during playback. Unfortunately, Filmic does not support this model so guess I have to look at other possibilities.

Edit to add: Set, in another test, I stitched all the four clips together, turn off sampling as your suggestion and render as 29.97 and got better results; no choppy replay and artifacts. My Samsung now becomes a usable video capturing devicel!! 😃 🙌 Vegas Pro 13 for VFR!!! 👍