Audio only Stream?
- Thread starter Kyle Tenuki Gray
- Start date
01. Short answer: No
02. Longer answer: The audio is encoded into the rtsp stream that carries the video (if you're talking about IPC/NVR). If you need to use something with a web GUI or is compatible with blue iris you would have to use an XVR from Dahua / Hik / whoever that has separate coaxial video and audio inputs. Connect your audio source to one of the open audio inputs and just leave the corresponding coaxial video input blank. If you're stuck using an IP camera with a built in mic / external mic or NVR with audio input and still have the same compatibility requirements, the only thing you could do is privacy mask the entire video, drop the resolution, fps, & bit rate.
03. Even longer answer: You could use a computer (windows/linux/macos/sbc/etc) to run rtspsimpleserver + ffmpeg to broadcast the desired audio with a "fake/empty" video stream over rtsp then add that to your recorder / blue iris as an "IP Camera". For this test I used a webcam mic connected to my PC via usb.
Ran rtspsimpleserver
Started FFMPEG with: ffmpeg -f lavfi -i color=c=black:s=1280x720:r=15 -f dshow -i audio="Microphone (Logi C270 HD WebCam)" -c:v libx264 -tune zerolatency -preset ultrafast -b:v 800k -c:a aac -b:a 128k -f rtsp rtsp:/10.10.10.29:8554/live
RTSP URL: rtsp:/10.10.10.29:8554/live which was added to VLC, NVR, and blue iris as a "camera" stream. The audio broadcast with zero issues on VLC, but the NVR and blue iris did not want to play the audio, but did broadcast the "blank" video. I'm sure I could get it working, but I needed a break from document creation and this served that purpose.
Afterthought you could also try an IP encoder with "audio in" if you didn't want to tinker with an actual computer:
02. Longer answer: The audio is encoded into the rtsp stream that carries the video (if you're talking about IPC/NVR). If you need to use something with a web GUI or is compatible with blue iris you would have to use an XVR from Dahua / Hik / whoever that has separate coaxial video and audio inputs. Connect your audio source to one of the open audio inputs and just leave the corresponding coaxial video input blank. If you're stuck using an IP camera with a built in mic / external mic or NVR with audio input and still have the same compatibility requirements, the only thing you could do is privacy mask the entire video, drop the resolution, fps, & bit rate.
03. Even longer answer: You could use a computer (windows/linux/macos/sbc/etc) to run rtspsimpleserver + ffmpeg to broadcast the desired audio with a "fake/empty" video stream over rtsp then add that to your recorder / blue iris as an "IP Camera". For this test I used a webcam mic connected to my PC via usb.
Ran rtspsimpleserver
Started FFMPEG with: ffmpeg -f lavfi -i color=c=black:s=1280x720:r=15 -f dshow -i audio="Microphone (Logi C270 HD WebCam)" -c:v libx264 -tune zerolatency -preset ultrafast -b:v 800k -c:a aac -b:a 128k -f rtsp rtsp:/10.10.10.29:8554/live
RTSP URL: rtsp:/10.10.10.29:8554/live which was added to VLC, NVR, and blue iris as a "camera" stream. The audio broadcast with zero issues on VLC, but the NVR and blue iris did not want to play the audio, but did broadcast the "blank" video. I'm sure I could get it working, but I needed a break from document creation and this served that purpose.
Afterthought you could also try an IP encoder with "audio in" if you didn't want to tinker with an actual computer:
As an Amazon Associate IPCamTalk earns from qualifying purchases.