Testing RVCamera - Video blurred

[iMesSolutions]

Hi!
I'm testing TRVCamera component for delphi seattle, using RVMedia 501 - unregistered version yet.
I am able to stream a live video from a camera (product of dallmeier in germany) by using rtsp protocoll. This works fine. But if I move the camera, i get blurred sections in the bottom area of my picture. The same effect occurs on displaying the video stream and doing nothing. It seems like picture "runs away". Please see the attached screenshot.
Thanks, Heike

[Sergey Tkachenko]

As I understand, you use FFmpeg.

Please test this compiled demo:
It uses newer version of RVMedia (unreleased yet) allowing to configure FFmpeg parameters:
http://www.trichview.com/support/files/ ... ffmpeg.zip

Try changing protocol in this demo.

[iMesSolutions]

Yes, I use FFmpeg.
On testing with your program, I found out, that the problem only occurs, if I use h.264 encoding format for the camera stream, whatever protocol is selected. If I chance encoding format to MJPG, everything works fine. Ofcourse the quality is worse.
It's my first time handling with video stream in my programs, I didn't really unterstand the difference between FFmpeg an GStreamer. Maybe I have to use GStreamer to show h.264 quality?
Thanks a lot for your help!

[Sergey Tkachenko]

Did you try the demo in my previous reply? I am quite sure that the problem must gone away if you will use TCP instead of UDP.

As for GStreamer. Please note that, unlike FFmpeg, it has a huge size. And, unfortunately, gstreamer.com is no longer available (it contained Windows version of GStreamer supported by RVMedia).
You can download that version of GStreamer from our web site:
http://www.trichview.com/resources/thir ... 2013.6.msi (for 32-bit projects)
http://www.trichview.com/resources/thir ... 2013.6.msi (for 64-bit projects).
But I still recommend to play with FFmpeg parameters.

[iMesSolutions]

Yes, tested with your program. Unfortunately same problem with TCP. Please see enclosed screenshots.

UDP.PNG (168.48 KiB) Viewed 64711 times

tcp.PNG (160.25 KiB) Viewed 64711 times

Maybe I should change some parameter in the stream configuration on the camera? Would you take a look on them and give me your opinion?

camera-parameters.PNG (7.65 KiB) Viewed 64711 times

As you reccomend, I will use FFmpeg.
Thanks for your help.

[Sergey Tkachenko]

Try reducing "Frames/Second" in the camera settings. 50 fps is too much for sending via Inet, try 14

[iMesSolutions]

Tested with 6.25 Frames/sec and changed resolution to 320 x 240 -> works fine

parameters-320x240.PNG (7.77 KiB) Viewed 64643 times

pic-320x240.PNG (132.87 KiB) Viewed 64643 times

changed resolution to 640 x 480 (Frames/sec still 6.25) - in camera settings and in your program -> bad Picture

pic-640x480.PNG (134.23 KiB) Viewed 64643 times

Further tests with resolution and frames/sec: only resolution 320x240 works, independently from the other parameters like frames/sec, bitrate, bitrate mode (camera settings) or protocol (your program)

[Sergey Tkachenko]

Please test with higher resolution and lower bitrate and smaller GOP size.

[iMesSolutions]

Tested with higher Resolution and lower Bitrate and smaller GOP size => picture is worse than before

640x480.jpg (59.31 KiB) Viewed 64556 times

Parameters.png (8.87 KiB) Viewed 64556 times

[Sergey Tkachenko]

Please test the same with TCP protocol

[iMesSolutions]

TCP doesn't change the result.

640x480TCP.jpg (62.67 KiB) Viewed 64346 times

May you have any other ideas?

[Sergey Tkachenko]

Try using the latest available version of FFmpeg DLLs, download it from http://ffmpeg.zeranoe.com/builds/
(choose 32-bit / shared)
There are two versions there, try both.

[Re.daniel10]

Hello, im a developer system in Brazil . Using DELPHI Berlin 10.1 ...

Someone can help me, how can i use the methods RVCamera1.GetSnapShot to take a photo.

Im trying to do the typeCast but is not working.

Help me please, and sorry some words wrongs rs

thanks... i ll wait a help

Syntax
function GetSnapShot: TRVImageWrapper;

returns:

Unit MRVImg;
Syntax
TRVImageWrapper = class(TObject);

returs:

Unit MRVBitmap;
Syntax
TRVMBitmap = class(TPersistent);
hmtoggle_arrow1 Hierarchy
TObject
TPersistent

I want get the photo, but dont have idea...

SEE YOU...

[ya_vanka]

Hi!

I have the same problem with rtsp and ffmpeg.
I am able to get streaming video from vlc (playing file and streaming it) by using rtsp protocoll. But if some scene changes quickly, I get blurred or corrupted sections in the bottom area of frames. ffmpeg libraries are up to date.

Video is in the following coedc: H264 - MPEG-4 AVC (part 10) (avc1)
Video resolution: 1280x720
Frame rate: 23.976023

I wanted to try GStreamer, but I failed to open rtsp://:8554/stream.sdp with gstreamer (I have a full installation and it works fine without any corruption via gst-play-1.0.exe rtsp://:8554/stream.sdp). But using RVMedia I can't play video stream via gstreamer version 1.0

Can you help me get rid of this problem using ffmpeg and explain how to open it via gstreamer?

Thanks a lot!

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[Sergey Tkachenko]

RVMedia supports GStreamer 0.1, not 1.0:
https://www.trichview.com/forums/viewto ... =17&t=9285