I have captured a stream with the following command: gst-launch -v v4l2src always-copy=FALSE device=/dev/video0 ! video/x-raw-yuv,width=640,height=480,framerate=10/1 \ ! queue ! ffmpegcolorspace ! x264enc byte-stream=TRUE bitrate=256 \ ! mpegtsmux ! filesink location=test.ts Now I am trying (and failing) to play it back. For example, gst-launch -v filesrc location=/home/.../test.ts ! ffdec_h264 ! video/x-h264,width=640,height=480 ! ximagesink fails to link ffdec_h264 to ximagesink. gst-launch -v filesrc location=/home/.../test.ts ! ffdec_h264 ! video/x-raw-yuv,width=640,height=480 ! ffmpegcolorspace ! ximagesink fails because the input format on ffdec_h264 was not set before data start. What am I doing wrong? I know that this can be done because playbin2 works. I want to learn how to do this manually. Thank you for all help! Also, I would appreciate all suggestions of how to figure out my error so I can learn from my mistakes. Chuck