18hans

6 hours ago, BTM_Pix said:

Though if you've ever been in a queue behind drunk people trying to order in a kebab shop on a Saturday night it's often a good idea to not offer them such a wide choice of options.

Haha interesting into which direction this discussion is leading ?

But developing a UI or something would be the easier part.

6 hours ago, BTM_Pix said:

If I was making these hypothetical booths for a living rather than trying to figure out ways to shoehorn the functionality into a GH5 then I'd base them on something like this 

https://astronomy-imaging-camera.com/product/asi294mc-color

It's primarily designed for astrophotography but essentially it's a pretty familiar Sony MFT sensor in a box that can run up to 120fps and is operated and transfers over USB3.

Where did u get this information from? On the linked website it says max. 19fps.

I'm using the GH5 in the first place because I have already access to it to check if the concept works out. But if it does, upgrading to a better suiting camera might be an option of course.

15 hours ago, tupp said:

I misread the requirement of a "box."  I thought that the box was intended as a "controller box" to enable the instant slow-mo -- not that the box was a "photo booth."  Now that I understand what you are trying to do, I think there might be better camera alternatives if you are not locked into getting a GH5 or using your A7's.  For instance, it would probably be easier to just use a machine vision camera that was constantly streaming and merely record/capture and playback that stream, with a button (or two) that starts/stops the right scripts.

I just had a look at these camera, there are no price tags but they are looking like industrial cameras which are quite costly I suppose?

To the Sonys and Panasonics I have access already and since it's only a small project, the investment probably won't be worth-it, at least not in the first stage.

If the idea works out well it might be possible to change the system but for the beginning it would be the best to go with the GH5 I think.

15 hours ago, BTM_Pix said:

I think its just a big button job isn't it?

Person comes in, presses button, shakes hair for a few seconds and then it autoplays on a TV.

So a button into a Raspberry Pi (either connected to a GPIO or a bluetooth key or midi button/footswitch), when it picks up the trigger it starts the camera, counts to however many seconds are needed, stops the camera, requests the files.html from the FlashAir, pulls out the last file name in that list, fires up mplayer with that file name, HDMI out of Pi to TV and job done.

Yes, that's exactly the plan.

Interesting though that you experienced something like that already hehe

1 minute ago, BTM_Pix said:

As far as I can see from the manual (I don't have a GH5), the Tether app has the option to write to the host PC as well as the card.

If mplayer can play files while they're still writing as @tupp says then it 

It depends on your file but mplayer should at least smooth out the playback even if it does take some time to buffer.

Yes it can write to the computer, but I'm not sure if mplayer could play it that way? 

Anyway, I think the FlashAir solution would be the better one if it works as planned. I will try it out and see.

Hey @BTM_Pix,

you got the problem right.

I don't understand how your first solution is supposed to work? If I got you right you want to use this Keyboard Maestro App basically for remote controlling the Mac and run the tether app on it? The problem ist, that the tether app has no feature for video playback included. And transferring the file and playing it back afterwards just takes too much time.

But your solution with the Toshiba Air sounds really interesting, I'm just wondering if the transfer rate ist high enough. 
But let's see, I have just ordered the W-04 card and will try it out.

Are you sure that it can be used as typical network drive? The only information I found so far is that it can be mounted as a WebDAV drive, but that should work as well I think.

11 hours ago, tupp said:

Getting deeper and deeper into the age of instant gratification...

It probably doesn't require a lot of processing power to simply slow down the frame rate -- it just takes a buffer/storage to hold the faster playback stream from the camera.

Okay maybe the problem was not so much the processing but if you transfer the video completly before processing that would take too much time already.

But your idea sounds interesting. So basically you say I should use the file stream and play it back directly? 

That would be an interesting alternative if the transferrates are high enough and of course if the codec can be streamed.
 And the the slowing down playback would not be needed anymore because I that case I can just use the video from the GH5 which can slow down internally, so only a normal speed playback would be needed.

If @BTM_Pix doesn't find a better solution I will have a look at it. 

1 minute ago, BTM_Pix said:

OK, I'll see what I can do.

I was thinking of incorporating some playback into my controller anyway so it could be useful.

I don't have a GH5 to test with so can you do me a favour and subscribe to this thread, that way you'll get an alert if I add something as there may be some testing I need you to do if I come up with a solution.

 

Yes I have subscribed already

And thank you so much for trying to find a solution!

1 minute ago, BTM_Pix said:

OK

Leave it with me.

My initial reaction is to say this is more readily doable with a Sony camera because their remote protocol is a bit more rounded (not to mentioned documented) than the Panasonic one but I'll have a look.

Yeah that's what I thought as well.

The problem is we only have A7sII and A7III cameras, and they can't produce proper slow motion video.

They only create high frame rate video files, which u need to slow down manually in software. But since the playback should start immediatly after recording, I want to avoid processing the videofile. Then also a slow machine like a raspberry probably wouldn't have enough processing power for slowing down the footage fast enough.

And the GH5 delivers exactly what I need, the only problem is the video playback ?

On 6/8/2018 at 10:04 PM, BTM_Pix said:

Just walk me through exactly what you want to do with it

The idea is to build a "slow motion box". The user inside the box hits a button connected with some sort of computer (Raspberry Pi i.e.) and the camera starts recording for a certain amount of time (some seconds).

Afterwards the user should watch the playback of the recorded footage. The problem is that transferring the file to the computer after recording takes too much time because it needs to record in a high quality codec for slow motion and the transfer rate is too slow. Usually a file of some 100 mb is created and transferring it even via USB-tethering takes 30secs and more which is way too long.

So my idea is to trigger the playback of the recorded footage in-camera and output it via HDMI from the camera to a TV.

I don't see any way to achieve this yet.

Hey guys,

I'm working on a project for which I need to start the video playback from the gh5 itself. I'm wondering if there is any possibility to do that. 

The original Panasonic App only offers playback on the phone/computer, but the built-in screen from the camera stays black, so I guess it is not possible.

But if you have any other information or know a way how I could achieve remote in-camera playback, it would be great.