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pseudostereo

Just rediscovering jit.gl.meshwarp (which is fantastic).

I'm wondering if there would be any way to first drag the vertices to points of interest in the image – without warping it – and then, once I've got the vertices where I want them, drag them around with the image contents following (that is, the default behavior)?

For example, imagine that I have an image of a house with a background that I want to distort precisely. Since the meshwarp vertices fall on a regular grid, none of them are likely to fall on the corners of the house, So I can only drag points that fall either on the background, or inside the perimeter of the house.

As far as I can tell, this isn't currently possible with jit.gl.meshwarp. If anyone can give me a hint how to implement this, I'd appreciate it.

I'm wondering if there would be any way to first drag the vertices to points of interest in the image – without warping it – and then, once I've got the vertices where I want them, drag them around with the image contents following  (that is, the default behavior)? 

Just rediscovering jit.gl.meshwarp (which is fantastic).
I'm wondering if there would be any way to first drag the vertices to points of ... 

jitglmeshwarp-possible-to-first-reposition-vertices-without-warping

Interesting problem! 
I think it should be possible by having two meshwarp, one for the points of interest and one for the actual image. 
The only problem would be that if you click on one the other will disappear. 
Maybe by rendering one to a node and videoplane and blending it on top of the other.
Let me know if you get stuck I will try to make a patch for this

Thanks Federico. Sounds good, but I don't have any idea how to implement what you're suggesting. If you could give me a few more clues (or better yet, throw together a quick demo patch) I'd very much appreciate it.

Will get to this in a couple of days, currently on vacation : ) 

Hi Federico - just a gentle nudge -  I'd really appreciate it if you could make an example patch - or even just point me in the right direction -

Hi Pseudostereo, forgive me for the delay. 
I have discovered that this is not possible yet with jit.gl.meshwarp out of the box. 
I am working on the object to make this kind of interaction possible. 
Thank you very much for your feedback


Hi Federico – thanks anyway - but do let me know if you manage to come up with anything - & if I can help in any way just ask

jit.gl.meshwarp - possible to first reposition vertices without warping?

agustin issidoro

Hello! I am trying to do a video patch that takes 1920 1080 video and does some z-displacements using jit.gl.mesh. However, at the output I always get a video that has been resized and that does not conform to 1920 1080.

Using @transform_reset 2 on jit.gl.mesh would do the work, but then I lose all the 3D views and displacements. 

The patch just fiddles randomly between frames (30 fps). First load a video, turn world on and open the gate.

Hello! I am trying to do a video patch that takes 1920 1080 video and does some z-displacements using jit.gl.mesh. However, at the output I...

jitglmesh-and-z-displament-incorrect-output-video-size

jit.gl.mesh and z-displament - incorrect output video size 

Masa

Hi, I used to use spigot~ to sync and route (to specific outputs) the audio of video playback in Max 6, but now I'm planning to do differently to benefit from avf engine (and 64 bit Jitter).

1. Set engine to qt and create an audio file separately by using spigot~ and locate it under "spigot-cache" folder

3. Play the audio file with sfplay~ and sync by sending "gettime" message to jit.movie and routing the 'time' data to sfplay~

My current basic idea is:
1. Set engine to qt and create an audio file separately by using spigot~ and locate it under "spigot-cache" folder
2. Set engine back to avf
3. Play the audio file with sfplay~ and sync by sending "gettime" message to jit.movie and routing the 'time' data to sfplay~

how-would-you-route-and-sync-the-audio-of-video-playback-in-max-7-avf

depending on the size of the movie file, i would use the import message to buffer~, and use groove~ to control playback, and sync using the groove~ sync-out with the new jit.movie @position attribute.

unfortunately, this only works in 32 bit mode. if you must use 64 bit mode, or if your movie files are too large to fit into memory, then i would simply export your movie audio to a separate audio track using quicktime or mpeg streamclip. the syncing can be done the same way, or you can sync using sfplay~ instead of buffer~ and groove~. in that case you need to tell sfplay~ to create a third outlet that outputs the current playback time. check out the "more features" tab of the sfplay~ help file for info. the playback time is in milliseconds, so simply divide by 1000.0 and send to the new jit.movie @time_secs attribute.


Thank you very much for the great example patch and the explanation. I can learn a lot from them!
Thank you for the alternative idea for 64 bit mode as well.
By the way, it's kind of a sub-topic and out of curiosity, but 'spigot_cache' message for spigot~ has been discontinued?


After done some testing I expected much less impact to route the audio to another channel.
Testing is done with Max 7.0.5, OSX 10.10.5, mbp retina 2014 Gefore GT 750M.
H264 and ProRess are identical, res is 1080P. Frame rates were all good unless noted. 

jit.movie: H264 6% CPU
jit.movie sfplay~: H264  90%
jit.movie groove~: H264 30~40% ProRess 100%
jit.movie spigot~: H264 100% (10fps avg) ProRess 100% (60fps avg)
jit.qt.movie (vade optimatizations): H264 40%

In the end I want to play three 1080P files on a new top of the line yet to buy Mac Mini with each file having a headphone for itself. I was very positive after building the first part with only jit.movie. Now I'm not so sure if the Mac Mini is capable of doing the groove~ option. Any ideas on this?


3 simultaneous 1080p movies with synced audio tracks should be possible with a new-ish mac mini, as long as you have @output_texture enabled and keeping the default avf engine as the backend (which means no spigot~ functionality).

if you only need playback, and won't require random time seeking, or backwards playback, you might be better off with h264, which will keep the file size down. if you need random seeking, then you should use prores or photo-jpeg.


No random seeking is needed, just playback. I'll go with the buffer~/groove~ option. Will try to post here if I got some test results.Thanks!

Any clue when more normal audio outputs from jit.movie are coming?


It seems that 3 simultaneous 1080p movies is the absolute maximum on my mac pro 2ghz intel core i7, with Intel Iris Pro 1536 MB. 

When inserting another (4th) audio synced video player, this one starts to freeze, while the other players stay fluid, when reading the frame rate all the four players are running on 24 fps. So what's the hidden clue here?


you might have more luck with the jit.gl.hap external (32 bit only), and encoding your movies with the HAP encoder. search above to find the external in the toolbox, with links to the codec.


We ended up encoding the right channel output in the PhotoJPG encoded Quicktime movie after exporting from Final Cut Pro. You can set the channel in Quicktime Pro 7 by pressing cmd+j, select the audio track and the choose the right channel. 

We messed up this project mainly because we found out that the external audio card (Hercules DEEJAAY 4+6) has a delay compared to the HDMI output from the Mac Mini + TripleHead2Go. In the final version we exported the movie with an audio delay so it would be in sync again.


@Rob Hap increases the performance significantly.
It runs five instances of audio synced video at a 45FPS on my on my mac pro 2ghz intel core i7, with Intel Iris Pro 1536 MB.  

But since hap encoding produces pretty large files I'll need a proper external ssd for the amount of material I'm going to process.
Do you think the LACIE RUGGED THUNDERBOLT SSD 250 GB is fast enough for this?


The external ssd drive is definitely fast enough. My project runs like a charm. 5 screens on high definition simultaneously alternating different video's and different audio sources perfectly in sync. I think I can even scale the project up to a few more displays.


How would you route and sync the audio of video playback in Max 7 (avf)?

dunk

Trying to figure out how I might use jit.gl.pix to track particular colours from one video source to mask other multiple video sources. Any help appreciated.

Jit.gl.pix colour track / mask / chromakey

jitglpix-colour-track-mask-chromakey

Ed Selby

I got an issue when capturing UHD video via a Blackmagic PCIe card using the device

The captured image is fine when using @output_texture 0 but it is half the width with artifacts when using @output_texture 1. See the screenshot attached.

Is there a solution to get the full width resolution for @output_texture 1 ?

are working in terms of texture resolution.

By the way, DeckLink Quad HDMI Recorder [Native]/ @output_texture 1 is the only setting where I am able to achieve 60fps as mentioned here:

https://cycling74.com/forums/video-capture-uhd60fps

Update: It does happen with FHD input source even worse, see attached screenshots

output_texture.png

output_texture_1920x1080.png

 Windows 10 / Max 8.1.4 GL3 

I got an issue when capturing UHD video via a Blackmagic  PCIe card using the device
- DeckLink Quad HDMI Recorder [Native]
The captured image is fine when using @output_texture 0 but it is half the width with artifacts when using  @output_texture 1. See the screenshot attached.
Is there a solution to get the full width resolution for  @output_texture 1 ?

The other Blackmagic devices
- Blackmagic WDM Capture
- Decklink Video Capture 
are working in terms of texture resolution.

By the way,  DeckLink Quad HDMI Recorder [Native]/ @output_texture 1   is the only setting where I am able to achieve 60fps as mentioned here:
https://cycling74.com/forums/video-capture-uhd60fps

 Windows 10 / Max 8.1.4 GL3 

I got an issue when capturing UHD video via a Blackmagic  PCIe card using the device
- DeckLink Quad HDMI Reco

blackmagic-native-video-capture-issue-when-using-output_texture-1

Blackmagic Native video capture issue when using @output_texture 1

zoomak

I would like to scan a picture like those radar scope with a bar turning around the center of the screen and reading each batch of pixels as turning around . I just foresee it for B&W pictures, no need of colors. It would be a king of stepper but turning around instead of sliding from LH to RH .

any idea to how begin prototyping this in Jitter ? 

Hi all,
I would like to scan a picture like those radar scope with a bar turning around the center of the screen and reading each batch of pixels as turning around . I just foresee it for B&W pictures, no need of colors.  It would be a king of stepper but turning around instead of sliding from LH to RH .
any idea to how begin prototyping this in Jitter ? 
thanks  


Hi all,
I would like to scan a picture like those radar scope with a bar turning around the center of the screen and reading each batch of p

Jitter Forum