Inject Video into stream or change video in stream, stream gets blink

[dhwanild]

image video is set in background, when video insert/change into stream, stream gets blinked when new video playing start or end
here i have attached video.

 

[Max]

Good day.
Please provide a more detaled description:
1. WCS version used
2. Stream publishing method: WebSDK (browser), Android/iOS SDK (mobile), RTMP (OBS), etc
3. How do you change video: switch source at publisher side, publish two streams and inject one into another using REST API, etc

 

[dhwanild]

Version : FlashphonerWebCallServer-5.2.2199
Stream publishing method: WebSDK (browser)
inject video using RestAPI : rest-api/stream/inject2/startup

 

[Max]

We can't reproduce the issue in the latest build 5.2.2201. Please check if both streams have a same audio and video codecs: Known limits. Please check also if you set all the parameters needed in the REST APi query /stream/inject2/startup
If the issue still persists, reproduce the issue, then collect a report using a special script Getting logs with report.sh script (preferable) and send using this form.

 

[dhwanild]

ca you please check below video, video gets blink at 8th second when changed video

Screen Recording 2025-03-25 135948.mp4

drive.google.com

 

[Max]

Please reproduce the issue, collect a report using a special script Getting logs with report.sh script (preferable) and send using this form.

 

[dhwanild]

Reproduce the issue at 2:25 PM IST and attached log report zip. please check it

find log file : https://drive.google.com/file/d/1WmrsUhtNScaIAYKAvnX2QtIGTvaEwdgu/view?usp=sharing
video file : https://drive.google.com/file/d/1tIKSytQaOCKu_ZoDTWiidsfkESwDkWe5/view?usp=sharing

 

[Max]

Seems like you are continiously injecting the same file to the same stream: when file reaches the end (every 30 seconds), you make another /stream/inject2/startup call with the same parameters. According to video attached, the original stream has static picture. So when injected stream ends, and before the next injection starts, it shows original stream picture. It may seem like blinking.
Consider to use the server parameter

vod_live_loop=true

In this case you don't need to repeat /stream/inject2/startup calls until inject termination with /stream/inject/terminate
Also we didn't see in logs how do you publish the original stream. If you're using WebRTC, please provide a smooth keyframe interval with the following server settings

periodic_fir_request=true
periodic_fir_request_interval=2000

If you're using another VOD file, please encode it with a stable keyframe interval.

 

[dhwanild]

we are using WebRTC Streaming URL
(BaseURL/embed_player?urlServer=wss://BaseURL&streamName=stream1&mediaProviders=WebRTC,MSE&autoplay=true)

start stream using API (rest-api/vod/startup)
parameters : {"uri":"vod-live://bg.mp4","localStreamName": "stream1","loop": true}

we are injecting VOD file periodically using API (rest-api/stream/inject2/startup)
Parameters : {"localStreamName":"stream1","remoteStreamName":"vod-live://bs.mp4","video":true,"audio":true}

Added static image video as background with loop while start stream

case 1 : inject 5 sec. video at 8th second when video end at 13th second you can see blank screen no background video appearing till 4 to 5 seconds.

case 2 : inject video at 23rd second, video was playing and at 27th second inject another video entire stream gets blink.

please check attached video,

Recording 2025-03-25 140034.mp4

drive.google.com

 

[Max]

case 1 : inject 5 sec. video at 8th second when video end at 13th second you can see blank screen no background video appearing till 4 to 5 seconds.

case 2 : inject video at 23rd second, video was playing and at 27th second inject another video entire stream gets blink.

Please provide SSH access to the server using this form for our engineers to test.

 

[dhwanild]

form filled with SSH details.

 

[Max]

We checked the server. You have an issues with server settings
1. Server CPU load is too high for a couple of streams

The server has 24 cores (actually it is 12c/24t). But you've set a twice more threads in all the thread pools:

So you really have 48 threads which are just consume CPU but does no useful work

We strongly recommend to remove the threads settings and leave them as default.
2. Seems like you're periodically checking if transcoders are active, but ignoring the search result and trying to create existing transcoder again and again

We recommend to check /transcoder/find (and other REST queries) result.
3. We also recommend to use a longer clip as a primary stream source to inject another VOD streams. A background clip should be longer than injected one.

 

[dhwanild]

changed in server settings as per your suggestion, still same issue. stream gets blink

 

[Max]

start stream using API (rest-api/vod/startup)
parameters : {"uri":"vod-live://bg.mp4","localStreamName": "stream1","loop": true}

This file seems to be used as background. It contains black square and silence

case 1 : inject 5 sec. video at 8th second when video end at 13th second you can see blank screen no background video appearing till 4 to 5 seconds.

So blank screen seems to be normal in this case between one inject stops and another inject starts.
Also the background file bg.mp4 is too short, and loops frequently. Use at least 1 minute file.