gstreamer vaapiencode_h264 occasional caps rejected

[Thiago Santos]

On 05/08/2014 02:07 PM, Haris Zukanovic wrote:
> 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=udp://239.5.2.1:6670 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?
Are the caps that are rejected always the same? Did you take a look at 
what your encoder supports and compared to what it gets when it fails?
>
>
>
>
> -- 
>
> *Haris Zukanovic*
> **
>
>
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-- 
Thiago Sousa Santos
Senior Multimedia Engineer, Open Source Group
Samsung Research America - Silicon Valley

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