<html> <head> <style></style></head> <body class='hmmessage'><div dir='ltr'>Hi all, I am newbie with Gstreamer and I am having problems to create a pipeline to display mp4 video format. The output of the gst-discoverer-0.10 of the related file is: ------------------------------------------------ Topology: container: Quicktime audio: MPEG-4 AAC video: H.264 Properties: Duration: 0:0Set the pipeline state to playing, so it actually displays video1:27.574000000 Seekable: yes Tags: video codec: H.264 / AVC language code: en audio codec: MPEG-4 AAC audio maximum bitrate: 139644 bitrate: 139644 encoder: Lavf55.36.100 container format: ISO MP4/M4A ------------------------------------------------ The "producer side is working" and the output of the gst_caps_from_string() is video/x-h264, stream-format=(string)avc, alignment=(string)au, level=(string)4.1, profile=(string)high, codec_data=(buffer)01640029ffe1003527640029ac34c80780227e5c05b808080a000007d20001d4c1d0c000e4e00000e4e1d77971a18001c9c00001c9c3aef2e1f088451601000428ee3830, width=(int)1920, height=(int)1080, framerate=(fraction)30000/1001, pixel-aspect-ratio=(fraction)1/1 In the "Consumer side" I tried something similar with the previous caps but without success and the GStreamer thrown an error and defined the following caps: video/quicktime; video/mj2; audio/x-m4a; application/x-3gp I have managed to create a pipeline with the following line but for VP8 encoding format: (GstPipeline *)gst_parse_launch( "appsrc name=\"src\" is-live=\"true\" do-timestamp=\"true\" " "caps=\"video/x-vp8, width=(int)640, height=(int)360, " "pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)1000/1\" ! queue2 ! " " vp8dec ! ffmpegcolorspace ! ximagesink sync=\"false\" ", NULL); I need something similar to this but I haven't manage to find. Please let me know if you know what is the issue. Thanks in advance, João MSM </div></body> </html>