Home/ Questions/Q 7492815
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-29T16:35:06+00:00

I am streaming video and audio from my web cam/microphone over UDP. When I

  • 0

I am streaming video and audio from my web cam/microphone over UDP. When I view the stream (even on the same machine) there is a delay of about 4 seconds. I have tried setting the UDP Cache setting to 0, or 1 but it doesn’t seem to help. I have tried reducing the video and audio bit-rates, using mono sound and reducing the sample-rate all to no avail.

Does anyone have any ideas how I could reduce the delay, to something better suited to for a video conference, i.e < 1 second?

Is there a setting I can apply to the viewer/streamer that can help?

Thanks,

Marc

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    In my study of VLC streaming with webcam, I got 2-3 seconds delay for UDP multicast stream transcoded with WMV/ASF container + WMV2 codec from Dell’s Creative Integrated Webcam with cif video size.

    If using MP4/MOV container + H.264 codec, I got twice the delay of the former with the same settings in bitrate, fps and scale.

    I disabled audio in both streaming settings since I wasn’t interested in it.

    I did the study with two VLC versions:

    • VLC 1.1.11 (latest Windows stable release)
    • VLC 2.1.0 (latest nightly build version)

    With the first version, I could transcode and stream from the webcam, but it could not playback the stream properly (it just gave a blackened video stream)

    With the second version, it worked well for transcoding, streaming and playback.

    This study was done on: 

    Intel Core 2 Duo T7250
4GB DDR2-667 SDRAM 
SATA 7200 RPM HDD
GeForce 8400M GS 128MB GDDR3 (+ 128MB shared memory = 256MB video memory)
Windows XP Pro SP3
    • 0