couldn't find associated picture parameter set with id: 0

Tim Müller tim at
Mon Jun 9 06:08:27 PDT 2014

On Fri, 2014-06-06 at 12:02 +1000, Dylan Broome wrote:

Hi Dylan,

as Nicolas said, please try the latest 1.2.x or even git master if you
can, just to make sure it's not a bug that's already been fixed.

>         Then on the client system we display the stream with the
>         following pipeline:
>         rtspsrc name=videosrc buffer-mode=1 protocols=tcp ! queue
>         name=videoqueue ! rtph264depay name=depay ! h264parse !
>         imxvpudec name=decode ! imxipuvideotransform ! imxipusink
>         name=sink sync=false
>         First we get this once :
>         0:00:02.786696666  2811 0x37d02030 WARN
>         codecparsers_h264 gsth264parser.c:1736:gst_h264_parse_pps:
>         failed to read SE
>         0:00:02.786785666  2811 0x37d02030 WARN
>         codecparsers_h264 gsth264parser.c:1743:gst_h264_parse_pps:
>         error parsing "Picture parameter set"
>         0:00:02.786826333  2811 0x37d02030 WARN
>         h264parse
>         gsth264parse.c:510:gst_h264_parse_process_nal:<h264parse2>
>         failed to parse PPS:
>         Thereafter we get this from what looks like every frame:
>         0:00:13.371507669  2793 0x37c02030 WARN
>         codecparsers_h264
>         gsth264parser.c:1814:gst_h264_parser_parse_slice_hdr: couldn't
>         find associated picture parameter set with id: 0

Well, it would be good to know what the data of the PPS is or why it
fails to parse it.

You also don't really need h264parse in the pipeline here, rtph264depay
*should* be able to output both bytestream format or avc format, so if
the decoder advertises correctly what it needs it should just work. Of
course it should work with h264parse too.

Pass -v to gst-launch-1.0 to check what output caps the rtph264depay
negotiates to.

If it's video/x-h264,stream-format=avc, then show us the codec_data
field of the caps.

If it's video/x-h264,stream-format=byte-stream, then add an .. !
identity dump=true ! .. between the rtph264depay and h264parse and show
us the output (in an attachment please) of the first few seconds/buffers
(until you see the pps parsing error for the first time).


Tim Müller, Centricular Ltd -

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