idikhowuda yevidiyo
Isiqulatho
We need a product with SDI and PAL as input and the Ethernet stream as output, with H.265 decoding.
1. Vcan1681 supports SDI and PAL.
https://ivcan.com/p/hdmi-to-ip-encoder-modulator-module-board-cvbs-hdmi/
2. We have two firmware to support H265 and H264 encoder and decoder.
Does your video encoder decoder support HD-SDI? 1080p or 1080i.
1. Max supports 1080P.
2. HDMI input supports 4k.
Can your encoder is compatible with any h264/h265 decoder i.e. Nvidia jetson decoder etc
We need to ask the engineer, please tell us the details of the video decoder if you have.
We also have video encoder and decoder board, if you both us ours, then it is no problem.
For 4k or 1080p video what will be ethernet data rate?
The video bitrate is configurable by the customer (umsebenzisi).
We will use your video encoder board with two input (HDMI kunye PAL) and with 12V alimentation. Is it ok?
Ngaba uthetha i-HDMI okanye igalelo le-AV (support two video types), okanye ufuna i-HDMI kunye ne-AV ukuxhasa amagalelo amabini ngaxeshanye?
Q: We need to have HDMI and AV to support two simultaneous inputs.
A: Kulungile. Our firmware engineer will some days to make a new firmware to meet this function you need. I will upgrade it and show you the test video. https://youtu.be/izdFa1nw7u8
iVcan: Please help to confirm that HDMI and cvbs can be supported at the same time, kodwa iaudio ingakhethwa kuphela kwenye yezi zimbini (inkqubo ikhetha i-HDMI i-audio ye-analog ngokwemeko yokufikelela kwividiyo), is it ok for you?
client: We don’t need audio, so do what is the best for you.
iVcan: Our software engineer has made a software for you. Please check the pictures in the attachments.
Now it supports an HDMI camera and CVBS camera.
client:
I have tested your encoder multiple times with our system. It is working fine overall.
But we have one big issue to be able to validate its usage :
Whenever we turn on the system Camera and the encoder at the same time we are unable to read the “mainStream”, sinokufunda kuphela i “Umsinga osezantsi”.
We have to “Reboot” the encoder via the web interface to make it work: after the reboot we can directly read the mainStream.
We tried with both VLC and GStreamer.
What could we try to have both streams readable on startup ?
iVcan:
In the opinion of our engineers, it is either a problem with camera recognition or a problem with customer use.
I suspect that the board card did not recognize the customer’s HDMI camera.
This is easy to verify (if you cannot access the sub-stream, it will be difficult to verify).
Log in to the web server of the encoder board and you can see the camera recognition status on the video page.
iVcan:
The video page will only display the recognition status of one camera. If HDMI and AV cameras are connected and recognized at the same time, the video page will display the recognition status of the HDMI camera (such as 1080p60):
As long as the HDMI camera can recognize it normally, Mainstream can be accessed normally.
If the HDMI camera is not recognized normally, please check the HDMI wiring and power on the board again (note that this is a power cycle, not a software restart on the web page)
Ukwengeza, the board uses a random Mac address, so the Mac address will change every time we restart it.
For devices with an ARP cache (such as a PC), after restarting, it will be temporary (a few seconds) unable to access the board from the network. , We cannot access it until the arp request is re-initiated after timeout (the performance is that the coding board cannot be pinged for several seconds after restarting)
ngoko ke, Ndicinga ukuba enye into enokwenzeka kukuba xa umthengi efikelela kwi-mainstream, ayinakufikelelwa ngenxa yezi zizathu zingentla. Emva koko xa umthengi efikelela kumsinga osezantsi, i-cache ye-arp iyahlaziya kwaye umthengi unokufikelela kuyo, kodwa umthengi akaphinde abuyele kwi-main-stream.
“Whenever we turn on the system camera and the encoder at the same time, we cannot read the “Mainstream”, we can only read the “subStream”.“
iVcan:
Ukujonga kwinkcazo yakho apha, kubonakala ngathi ikhamera yakho iqalwe emva kwebhodi yethu yokufaka iikhowudi. Nceda uqale ikhamera yakho kuqala, kwaye emva koko ulayite kwaye uqalise ibhodi yethu yokufaka iikhowudi ukuyizama. Mhlawumbi ayisetyenziswanga ngaxeshanye. Umyalelo onikwe amandla nawo ubalulekile. Umzekelo, iimfuno zakho zokuqalisa ikhamera 10 imizuzwana, kodwa ibhodi yethu yokufaka ikhowudi yokuqalisa ifuna kuphela 5 imizuzwana.
Kuba andiqinisekanga ukuba ikhamera yakho icotha kakhulu ukuqalisa emva kokukhanyisa.
Kuba ibhodi yethu yokufaka ikhowudi iqala ngokukhawuleza, it may be that the camera has not been initialized after it started our encoder board, which may lead to some unexpected problems. This can also explain why “We have to “Reboot” the encoder via the web interface to make it work: after the reboot we can directly read the mainStream.”, because when your web page restarts the encoder board, the camera has already been initialized.
ngoko ke, the final suggestions are as follows (I tried my best to list everything that came to mind and let you test them separately);
Look at the video page of the web server and confirm whether the HDMI camera is recognized normally (you can send a screenshot to us). As long as the camera is recognized normally, Mainstream can be accessed;
It is recommended that you ping the coding board under cmd first, kwaye emva koko ufikelele kwi-mainStream kunye ne-subStream phantsi kwe-vlc ukunqanda ngempazamo ukucinga ukuba i-Mainstream ayinakufikelelwa ngenxa yemiba ye-mac engaqhelekanga..
Vumela ukuba uqale ikhamera yakho kuqala (imizuzwana embalwa), emva koko ukhanyise kwaye uqalise ibhodi yethu yokufaka iikhowudi ukuzama (bona izizathu ezichazwe ngasentla)
Follow your original operation of “turn on the system camera and the encoder at the same time”. When the problem “we are unable to read the “mainStream”, we can only read the “subStream”.” is reproduced, Sukuphinda uqalise ibhodi yokufaka iikhowudi kwiphepha lewebhu, kodwa shushu-tshintshanisa intambo ye-HDMI phakathi kwekhamera yakho kunye nebhodi yokufaka iikhowudi. Ndicinga ukuba lutshintsho olushushu kuphela (kuba ndiyakrokrela ukuba yingxaki yokukhangela iplagi ebangela ukuba ikhamera ingaqhagamsheli kwibhodi yokufaka iikhowudi. Thumela isignali yeHDMI).
client:
I can always read the subStream. The mainStream only after reboot.
iVcan:
Then our encoder board can detect your camera.
Please do a test.
Vumela ukuba uqale ikhamera yakho kuqala (imizuzwana embalwa), emva koko ukhanyise kwaye uqalise ibhodi yethu yokufaka iikhowudi ukuzama.
The engineer worries about that your camera startup needs 10 imizuzwana, kodwa ibhodi yethu yokufaka ikhowudi yokuqalisa ifuna kuphela 5 imizuzwana.
Please do this test to rule out the possibility of different startup times.
iVcan:
When you are testing, it is better to adjust the setting back (red words) or see the below picture.
client:
The encoder board and the camera are both powered on at the exact same time. It is likely that the camera startup takes a bit longer than the encoder board.
I confirm that the camera seems to be not recognized on startup “CVBS pal” is displayed at the top.
I can ping the board fine before trying to read both streams
When I start my camera first (imizuzwana embalwa), then power on (15 seconds later) and start the encoding board, I can read the stream just fine.
If I “turn on the system camera and the encoder at the same time”. And then hot plug the HDMI (15 seconds later), I can read the stream just fine.
What can I do to be able to read the mainStream without having to do on of these things ? Send an http request reboot with my software, a few seconds after startup ?
iVcan:
Kulungile, that proves my guess right. For our other customers, the camera and our encoding board are all powered on at the same time. The cameras can recognize our encoding board normally and send out HDMI signals. Only a few customers have encountered such problems using their customized HDMI cameras. The following is Solved by customers themselves (modifying their camera settings/changing cameras).
client:
Do you have the version of the software you develop for us? We will precise it in our PO.
iVcan: The firmware version is v6.5.5a for your device.
We have a faulty of the video encoder, Ndingenza ntoni?
1. From the photo you showed, we found that the capacitor and inductor in the lower left corner were damaged due to external force. Perhaps they were knocked off during packaging and transportation, and your company accidentally knocked them off during operation.
The highlighted ones are the missing devices, which are:
1、C176：CAP,10NF,+/-10%,X7R,1000V,SMD1206
2、C21：CAP,22UF,+/-20%,X5R,6.3V,SMD0603
3、R34：FB,120R@100M,+/-25%,3A,SMD0603 （magnetic beads）
Please try to find the same parts, replace them and then check carefully to see if there are any other missing parts.
If you still have questions, nceda uqhagamshelane nathi.
client:
this faulty part is used to operate which circuit?
iVcan:
1.5V supply amandla, powering DDR， Nceda ujonge umfanekiso ongezantsi.
client:
We replaced the components according to your advice, the encoder is not functional.
Ukwengeza, we noted other quality problems with the welds, several manual reworks.
How can we proceed with a standard exchange under warranty?
iVcan:
Don’t worry about it, please send it back to us, and we will change a new one for you.
Does your HDMI + CVBS video encoder board support ONVIF?
The engineer said that the ONVIF protocol is not fully supported. It depends on your specific requirements.
The video player supports RTSP, VLC, Easyplay, and protocol support UDP player.
Can I use hdmi stream and CVBS stream together?
Our video encoding board supports two channels of video at the same time, one is HDMI video stream and CVBS video stream encoding.
umbuzo: What time characteristic does your DVB-T modulator (umshini) have? We can see the below if we look at DVB-T standard ETSI EN 300 744.
But what times are in your DVB-T TX module?
We need it because we are thinking of fast-changing frequency during video streaming, so we need to understand the real times for this mode. We use QPSK, CR=1/2, GI=1/32, bandwidth = 8 MHz.
Phendula: In our DVB-T modulator, both transmitted symbol time and guard time are the same, nge 400 744 iinkcukacha
cvbs converter to IP, конвертер av сигнала в ethernet, SDI CVBS encoder,
Q: How much will be the latency if I connect two cameras (lwetshiphu + CVBS)?
I have two cameras, one is a hdmi camera, and the second is a CVBS camera. I will convert both video streams to IP ethernet by this board and the opposite receiver side will be a computer.
A:
The delay of the video encoding board must take into account the encoding and decoding. It is impossible to test the accurate delay from the encoding board alone.
ngokwesiqhelo, the delay caused by the decoder board is greater.
With different software players, the latency varies greatly. Umzekelo, using our Splayer the delay is about 100ms, and using VLC the delay can be up to 300ms.
The delay of the CVBS camera is difficult to measure accurately. Delays below 100ms are difficult to measure with a stopwatch. Ukwengeza, the delay of Vcan1681 itself is not easy to test. Without the decoder board, you can’t even see the image. It cannot be calculated by using a stopwatch, and there is no way to measure it with an oscilloscope.
After the customer buys the encoding board, he will definitely need a player to decode. Then it is better to ask the customer what kind of player he plans to use for decoding (ours, the customer’s own, or a third party), so that we can know better whether the coding board can meet customer requirements (function and performance) okanye hayi.
How to test the video encoder board latency?
- I pointed the camera at the stopwatch on my computer screen.
- Another computer plays the video sent from the current encoding board and also displays the stopwatch on the computer screen.
- You need to reduce two times, namely the delay from the camera to the monitor. (Including camera and screen delay)
- Please check the below pictures
Q: How much is the latency if I use your encoder and decoder board?
A: It is better to use our encoder and decoder board. The encoder and decoder board prices is the same. The below latency test result is only for your reference, not including the camera delay.
- CVBS input to our encoder board—–our decoder board with HDMI output, the delay is 60~90ms
- HDMI input to our encoder board—–our decoder board with HDMI output, the delay is 90~130ms
- HDMI 720P input our encoder board——–our decoder board with HDMI output, the delay between 80~100ms
- HDMI 1080P input our encoder board——–our decoder board with HDMI output, the delay between 100~130ms
For lower latency, you also can use our video encoder and video decoder board. It will be much better than playing the video streaming on your computer via the VLC player.
