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INDI Library v1.9.5 Released (08 Mar 2022)

Bi-monthly INDI Library released with new drivers and bug fixes.

Cannot play back SER videos?

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I checked out your cropped and non-cropped files and they are exactly the same size (36,001KB).

The header of the cropped SER file claims that the frame size is 640 x 480, but the frame data is clearly not actually cropped and is actually the full frame data (1280 x 960). This will be why no software is able to play it.

Cheers,
Chris
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3 years 8 months ago #29370

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That's helpful! Thank you! Wonder if there is a way to edit the header? I've got gigabytes of data of (cropped) mars. If I could just tell the software it's not actually cropped I might be able to revive the files...
3 years 8 months ago #29390

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Yes, editing the header would be simple and would fix the files. You just need a hex editor. I can tell you the bytes you need to edit if you wish.
What OS are you using?
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Last edit: 3 years 8 months ago by Chris Garry.
3 years 8 months ago #29391

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To set the frame size to 1280 x 960 you need to ensure the bytes in the file are set to the following:

Address: Value
0x001A: 0x00
0x001B: 0x05
0x001C: 0x00
0x001D: 0x00
0x001E: 0xC0
0x001F: 0x03
0x0020: 0x00
0x0021: 0x00

I just tried with your broken SER file and it fixed the file.
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Last edit: 3 years 8 months ago by Chris Garry.
3 years 8 months ago #29396

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Awesome, that works. I'll just write a simple script to apply this fix to all of my broken files.

Cheers,
Kari
3 years 8 months ago #29399

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Replied by Jim on topic Cannot play back SER videos?

Excellent, this could be the problem that has been plaguing me for some time. I haven't had time to look into it more, but will have to try some .ser again to see.
12" pier with HDX110 using EQMod
ASI 1600 mono/color mains with ASI290MM in off-axis
ASI filter wheel
Moonlite focusers for the sharpening
AT115EDT w/.8x for the light
Fedora Linux, 100% INDI
3 years 8 months ago #29416

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Would appreciate if someone can take a look at the code and identify the issue.
Jasem Mutlaq
Support INDI & Ekos; Get StellarMate Astrophotography Gadget.
How to Submit Logs when you have problems?
Add your observatory info
3 years 8 months ago #29417

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I had the same issue with the video files i recorded with Kstars/Ekos during the weekend.
My camera is a ToupTek GP-1200-KMB Mono and I was recording in full resolution (1280x960).
IAccording to the manual my camera supports a bit depth of 12.

In the INDI Control Panel inside KStars I selected the camera and on the Image Info tab in it says "Bits per pixel: 16".
And on the Controls tab I can see that "Mono 16" is selected. The only other option is "Mono 8".

I wonder if this is the issue for me? Camera supports only 12 bits but INDI is configured for 16?

However, the live view looked good and recording went fine.
I also captured some normal frames that looks fine (see attached image).

But the movies I recorded with the live view (ser format) looks very weird when i see them in AutoStakkert and I am not even able to open them in PIPP.
The moon appears twice on the videos and it does not look at all like the single frames.
The 2 moons looks like they are made of white and black noise.

If I reduce the SER scaling in Autostakkert to 8 bit there are still 2 moons and each of them looks a bit like the single frames I captured (but much darker).
If I turn up the brightness to 8x the 2 moons starts looking much more like the single frames, but it is obvious that the greyscale quality is much worse.

PIPP shows me this header details for one of the ser files:
Warning: Spoiler!


is there any way I can fix the videofiles so I can stack them?
Last edit: 2 years 1 month ago by Stefan R..
2 years 1 month ago #51459
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I can confirm that I can record video files that works fine if I select "Mono 8" on the Controls tab.
So I will do that going forward. But I still hope to save the videos I took during the weekend if anyone has a tip I will be very happy.

BTW, I can also confirm that trying to record cropped videos from the Live view results in useless video files no matter if "Mono 8" or "Mono 16" are selected.

EDIT: I used a hex editor to change the bit depth in the SER file header from 16 bit to 8 bit. It made it possible to open and watch the files but the video stream was corrupted and the images could not be used for stacking. So I have to delete the files and capture new ones with "Mono 8" next time I have clear skies.
Last edit: 2 years 1 month ago by Stefan R..
2 years 1 month ago #51460

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I played a bit around and it looks like Ekos always dumps full resolution 8 bit depth SER videos when recording from the live view (with my camera at least).
However, the SER header gets the correct information about bit depth (Based on INDI settings) and resolution (Based on live view frame size).

If anyone can point me to the place in the code where video files are written to disk I can try to take a look at it.
I am a developer by profession and have some C++ experience from years back, but I have no experience with the KStars/Ekos code or INDI.
Last edit: 2 years 1 month ago by Stefan R..
2 years 1 month ago #51461

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Right so when live streaming, bit-depth is automatically reduced to 8bit to help make it faster. This is done in INDI. Thanks for offering to help, it is very much required to improve streaming & recording issues in INDI. You can find the logic in the function asyncStream in streammanager.cpp in INDI.

Right now, it's downscaling to 8bit. Though I can see that one improvement could be to immediately record the data before performing the downscaling. At any rate, I'm open to ideas for improvement. A few weeks ago I had to disable the threading for asyncStream when recording is active as I couldn't trace back a thread issue with file descriptors. Right now it's running on the main thread so it's slower but works OK. If you can also investigate this part it would be great!
Jasem Mutlaq
Support INDI & Ekos; Get StellarMate Astrophotography Gadget.
How to Submit Logs when you have problems?
Add your observatory info
2 years 1 month ago #51464

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I would like to set it up locally on my machine so I can debug it.
I guess that it is possible to make the local KStars project use the local INDI project so I can debug it and try out my code changes.

And I guess that you already have that set up so any suggestions would be great before I try to make it work on my own.
I am using Debian for the task.
2 years 1 month ago #51493

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