<html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body bgcolor="#FFFFFF" text="#000000"> Hi everyone, I have a short experience with gstreamer and might be missing something very basic... so please bear with me. I have setup a test with gstreamer where I use vaapiencode_h264 to encode and output streams. Underlying hardware accel is Intel Quick Sync with updated drivers. Input is rtp transport stream which is quite good quality and stable. Ouput is also transport stream. My test command works but only sometimes! Quite often, on average 1 in 3, it fails to negotitate the pipeline with following error message: ERROR: from element /GstPipeline:pipeline0/GstVaapiEncodeH264:v1enc: GStreamer error: negotiation problem I included debug log with more details below... My command is: gst-launch-1.0 \ udpsrc uri=<a class="moz-txt-link-freetext" href="udp://239.5.2.1:6670">udp://239.5.2.1:6670</a> auto-multicast=true ! \ decodebin name=rawinput \ rawinput. ! queue ! videoconvert ! deinterlace ! tee name=v \ \ \ v. ! queue ! vaapiencode_h264 name=v1enc rate-control=cbr bitrate=300 keyframe-period=90 tune=none ! mux. \ v. ! queue ! vaapiencode_h264 name=v2enc rate-control=cbr bitrate=700 keyframe-period=90 tune=none ! mux. \ v. ! queue ! vaapiencode_h264 name=v4enc rate-control=cbr bitrate=1500 keyframe-period=90 tune=none ! mux. \ \ \ rawinput. ! queue ! \ audioconvert ! faac ! mux. \ \ mpegtsmux name=mux ! \ udpsink host=224.1.1.1 auto-multicast=true port=1234 This is the extraction of errors and warnings from the log: 0:00:00.157710724 18037 0x7f6ca0 WARN default descriptions.c:612:format_info_get_desc: Unexpected MPEG-1 layer in audio/mpeg, mpegversion=(int)1 0:00:00.157762414 18037 0x7f6ca0 WARN tsdemux tsdemux.c:993:create_pad_for_stream: Non-media stream (stream_type:0x86). Not creating pad 0:00:00.507589178 18037 0x7f6a30 ERROR vaapi gstvaapiencoder.c:841:gst_vaapi_encoder_set_rate_control: unsupported rate control mode (1) 0:00:00.507654893 18037 0x7f6a30 WARN videoencoder gstvideoencoder.c:608:gst_video_encoder_setcaps:<v1enc> rejected caps video/x-raw, format=(string)I420, width=(int)544, height=(int)576, pixel-aspect-ratio=(fraction)24/17, interlace-mode=(string)progressive, chroma-site=(string)mpeg2, colorimetry=(string)bt601, framerate=(fraction)50/1 0:00:00.507702294 18037 0x7f6a30 WARN videoencoder gstvideoencoder.c:1368:gst_video_encoder_chain:<v1enc> error: encoder not initialized 0:00:00.507749254 18037 0x7f6a30 INFO GST_ERROR_SYSTEM gstelement.c:1835:gst_element_message_full:<v1enc> posting message: GStreamer error: negotiation problem. 0:00:00.507809417 18037 0x7f6a30 INFO GST_ERROR_SYSTEM gstelement.c:1858:gst_element_message_full:<v1enc> posted error message: GStreamer error: negotiation problem. ERROR: from element /GstPipeline:pipeline0/GstVaapiEncodeH264:v1enc: GStreamer error: negotiation problem. 0:00:00.518770151 18037 0x7f12d8003190 WARN GST_PADS gstpad.c:3669:gst_pad_peer_query:<v4enc:src> could not send sticky events 0:00:00.519029265 18037 0x7f12e00022d0 WARN GST_PADS gstpad.c:3669:gst_pad_peer_query:<v2enc:src> could not send sticky events The "rejected caps" warning appears sometimes on other encoder elements (v2enc and v4enc) and occasionally on even multiple encoder elements. Would anyone please point me to where to search for the solution to this? <div class="moz-signature"> -- <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> Haris Zukanovic </div> </body> </html>