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Question Help for Vr videos re-encode to normal

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MeTop said:
Another way to watch VR without headset is using mpv+VR-reversal
Click to expand...
Just looked through VR-reversal's code and saw that they use v360 filter to render to 2D

You can use this command in ffmpeg to get the same effect "-vf v360=input=hequirect:output=flat:in_stereo=sbs:out_stereo=2d:d_fov=110:pitch=0:yaw=0:w=1920:h=1080:interp=cubic -crf 17 -preset slower"

Edit the variables to your liking:
d_fov= maximum fov recommended 130, default 110, minimum fov recommended 98
pitch= up-down angle view (positive goes up)
yaw= right-left angle view (positive goes right)
w= video width
h= video height

Sample using 110° FOV https://bunkrrr.org/v/BabeVR_Prom_Night_Pressure_(Oculus)_1-DgGki0fi.mp4
 
MeTop said:
Just looked through VR-reversal's code and saw that they use v360 filter to render to 2D

You can use this command in ffmpeg to get the same effect "-vf v360=input=hequirect:output=flat:in_stereo=sbs:out_stereo=2d:d_fov=110:pitch=0:yaw=0:w=1920:h=1080:interp=cubic -crf 17 -preset slower"

Edit the variables to your liking:
d_fov= maximum fov recommended 130, default 110, minimum fov recommended 98
pitch= up-down angle view (positive goes up)
yaw= right-left angle view (positive goes right)
w= video width
h= video height

Sample using 110° FOV https://bunkrrr.org/v/BabeVR_Prom_Night_Pressure_(Oculus)_1-DgGki0fi.mp4
Click to expand...
Thank you very much bro, I'm new to ffpmeg but I read somewhere that this was the correct path, I'll try later
 
MeTop said:
Just looked through VR-reversal's code and saw that they use v360 filter to render to 2D

You can use this command in ffmpeg to get the same effect "-vf v360=input=hequirect:output=flat:in_stereo=sbs:out_stereo=2d:d_fov=110:pitch=0:yaw=0:w=1920:h=1080:interp=cubic -crf 17 -preset slower"

Edit the variables to your liking:
d_fov= maximum fov recommended 130, default 110, minimum fov recommended 98
pitch= up-down angle view (positive goes up)
yaw= right-left angle view (positive goes right)
w= video width
h= video height

Sample using 110° FOV https://bunkrrr.org/v/BabeVR_Prom_Night_Pressure_(Oculus)_1-DgGki0fi.mp4
Click to expand...
Hey, I'm new to ffmpeg as well. I tried to do sth, but well... the output is real shit.
Can anyone help me find proper settings for my conversion? Here is example vid, it's 1,5 min long.
Thanks!

 
kramex69 said:
Hey, I'm new to ffmpeg as well. I tried to do sth, but well... the output is real shit.
Can anyone help me find proper settings for my conversion? Here is example vid, it's 1,5 min long.
Thanks!
Click to expand...
I advise you to get the highest quality version of your scene, try looking in torrent forums like pornolab, emporium, uniondht.

Cut the different position changes and play with 'pitch'(up-down) and d_fov(zoom) filters. You can do that with -ss and -t. -ss specifies start time and -t duration. Then Concatenate all positions to a full video.

Using spoiler so I don't create a wall of text
From your sample I've counted 6 different positions

Position 1: use d_fov=112:pitch=-40
Position 2: d_fov=122:pitch=-10
Position 3: d_fov=112:pitch=-20
Position 4: d_fov=116:pitch=-40
Position 5: d_fov=110:pitch=-28
Position 6: d_fov=112:pitch=-36

You also can increase the image quality lowering the -crf, to a minimum of -crf 10, but you will get a huge file.
Your 1440p sample is 75,4MB, downscaled to 1080p and using -crf 10 I got a 174MB.
 
Thanks! Cutting the vid takes too much time, but I'll try it later.
I played with d_fov and pitch and it looks better now.
 
MeTop said:
I advise you to get the highest quality version of your scene, try looking in torrent forums like pornolab, emporium, uniondht.

Cut the different position changes and play with 'pitch'(up-down) and d_fov(zoom) filters. You can do that with -ss and -t. -ss specifies start time and -t duration. Then Concatenate all positions to a full video.

Using spoiler so I don't create a wall of text
From your sample I've counted 6 different positions

Position 1: use d_fov=112:pitch=-40
Position 2: d_fov=122:pitch=-10
Position 3: d_fov=112:pitch=-20
Position 4: d_fov=116:pitch=-40
Position 5: d_fov=110:pitch=-28
Position 6: d_fov=112:pitch=-36

You also can increase the image quality lowering the -crf, to a minimum of -crf 10, but you will get a huge file.
Your 1440p sample is 75,4MB, downscaled to 1080p and using -crf 10 I got a 174MB.
Click to expand...
HI MeTop can you put the script for exemple that video that you talk about with diferente positions? Because i'am trying to create one to change the position of the camera at a specified time and stop at another. But for some reason is not working.
Can you post her a example of one script for a video to change the positions.

Thanks
 
Code: 
ffmpeg -y -ss [1] -i "[2]" -to [3] -copyts -vf v360=input=hequirect:output=flat:in_stereo=sbs:out_stereo=2d:d_fov=[4]:pitch=[5]:yaw=[6]:w=1920:h=1080:interp=cubic -avoid_negative_ts make_zero -preset slower -crf 17 "[7]"

[1]: start time
[2]: input filename/path
[3]: end time
[4]: diagonal fov
[5]: vertical camera movement
[6]: horizontal camera movement
[7]: output filename/path
I've made a post above on how to use d_fov, pitch and yaw.
Remove w= and h= if you don't want to downscale resolution
 
I'm not sure if this quite fits in with what you guys are talking about as both the eporner and gofile videos you referenced have since been deleted.

But if what you mean is turning a side by side VR video that's meant to be played with glasses into a 360 video you can play on a normal screen and just move around, I've found there's a solution.

It consists of adding 360º metadata to a VR video, which tells players like VLC or the windows default player to play the side by side VR video like a 360 video where you can look around.

The way I do it is using a free software called Spatial Media Metadata Injector. Github link: https://github.com/google/spatial-media/releases

I haven't looked around to see if there's other/better apps to do it, because this one works well for my use case. But I wouldn't be surprised if there were.

You just open the app and add a video, it takes a minute or two to “process it” (just adding the 360 metadata, the video otherwise remains the same) and then saves it alongside the original (which I delete as I only care about the copy of it that can be played as 360).
 
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