I'm having a problem with the gsttuner interface changing the video norm but the pipeline not going to PLAYING afterwards. My capture cards all seem to default to PAL on power up, I need to set them to NTSC before I can use them. Can someone offer me a clue as to why the v4l2src pipline would fail to go into Playing state after the video norm has been changed using the gsttuner interface? After a reboot, (or setting the norm to PAL with another application): The v4l2 device is '/dev/video1'. Previous Norm: PAL Current Norm: NTSC Capturing from v4l2src to appsink isource failed to go into PLAYING state Reading from appsrc to xvimagesink ^C But if I run the program again: The v4l2 device is '/dev/video1'. Previous Norm: NTSC Current Norm: NTSC Capturing from v4l2src to appsink Reading from appsrc to xvimagesink Main Loop Running... obus Error: Output window was closed Returned, stopping playback Deleting pipelines Closing the xvimagesink is my "normal" exit mode for the time being and probably will be a good choice overall for my needs. I've about six different capture cards and a pair of USB capture devices and all have this issue. I can reset the norm to PAL with xawtv or TVtime and repeat the process, locks up when changing the norm, works the second time I run the program as the norm has been changed before the lockup. I assume the lockup is because without the appsink running the pipeline that starts with appsrc never runs. If I remove the appsink and appsrc and make only a single pipeline then it seems to always start after the norm change, but then is pretty useless to me as the whole point is to use the appsink to source data for my image processing and then use a pair of appsrc pipelines for real time visual feedback and recording the output to disk. --wally.