Home/ Questions/Q 6996853
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-27T20:12:36+00:00

Using this pipeline I can play two of the same videos using the videomixer,

  • 0

Using this pipeline I can play two of the same videos using the videomixer, however when I play two different videos it fails.

gst-launch -e videomixer name=mix ! ffmpegcolorspace ! xvimagesink  \
   uridecodebin uri="file:///home/dtolj/projects/test1.mp4" ! decodebin2 ! videorate ! videoscale ! video/x-raw-yuv,width=320,height=180 ! videobox border-alpha=0 top=0 left=0 ! mix. \
   uridecodebin uri="file:///home/dtolj/projects/test2.mp4" ! decodebin2 ! videorate ! videoscale ! video/x-raw-yuv,width=320,height=180 ! videobox border-alpha=0 top=0 left=-320 ! mix.

error: 

ERROR: from element /GstPipeline:pipeline0/GstURIDecodeBin:uridecodebin1/GstDecodeBin2:decodebin22/GstQTDemux:qtdemux0: GStreamer encountered a general stream error.
    Additional debug info:
    qtdemux.c(3865): gst_qtdemux_loop (): /GstPipeline:pipeline0/GstURIDecodeBin:uridecodebin1/GstDecodeBin2:decodebin22/GstQTDemux:qtdemux0:
    streaming stopped, reason not-negotiated
    ERROR: pipeline doesn't want to preroll.
Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    It seems I was decoding the video two times, I removed decodebin2, also gstreamer seems very picky about video formats. Maybe I shouldn’t rely on uridecodebin too much and try to use an appropriate demuxer.

    • 0