rtpvrawdepay can't handle caps

[Nicolas Dufresne]

Le mardi 27 avril 2021 à 14:24 -0500, Pinadi via gstreamer-devel a écrit :
> Hi, I'm doing some testing with gst-launch to get a live stream with as low
> latency as possible. I have a working H.264 stream with about 100ms latency.
> I'm trying to send raw video instead of H.264 to get the latency closer to
> 0.
> 
> 
> When doing a command like this on the receiver:
> gst-launch-1.0 -v udpsrc port=5004 retrieve-sender-address=false ! \
> application/x-rtp, media=video, encoding-name=RAW, sampling=YCbCr-4:2:2,
> depth=8, payload=96, colorimetry=BT601-5, payload=96, a-framerate=30 ! \
> rtpvrawdepay ! videoconvert ! fbdevsink
> 
> I get the error message:
> WARNING: erroneous pipeline: could not link udpsrc0 to rtpvrawdepay0,
> rtpvrawdepay0 can't handle caps application/x-rtp, media=(string)video,
> encoding-name=(string)RAW, sampling=(string)YCbCr-4:2:2, depth=(int)8,
> payload=(int)96, colorimetry=(string)BT601-5, a-framerate=(int)30

The support name shortcut colorimetry must be exact to what gstreamer support,
BT601-5 is not recognized. Here's the list of defined names:

#define GST_VIDEO_COLORIMETRY_BT601       "bt601"
#define GST_VIDEO_COLORIMETRY_BT709       "bt709"
#define GST_VIDEO_COLORIMETRY_SMPTE240M   "smpte240m"
#define GST_VIDEO_COLORIMETRY_SRGB        "sRGB"
#define GST_VIDEO_COLORIMETRY_BT2020      "bt2020"
#define GST_VIDEO_COLORIMETRY_BT2020_10   "bt2020-10"
#define GST_VIDEO_COLORIMETRY_BT2100_PQ   "bt2100-pq"
#define GST_VIDEO_COLORIMETRY_BT2100_HLG  "bt2100-hlg"

> 
> 
> Removing "depth" will let me run without this error, but when I start
> sending the stream from the other end I instead get this error on the
> receiving end:
> 
> Output caps are unfixed: application/x-rtp, media=(string)video,
> encoding-name=(string)RAW, sampling=(string)YCbCr-4:2:2, payload=(int)96,
> colorimetry=(string)BT601-5, a-framerate=(int)30, clock-rate=(int)90000,
> depth=(string){ 8, 10, 12, 16 }
> 
> 
> I'm a bit lost on how to proceed. I've found older examples that have been
> posted on various forums, but none work for my setup.
> 
> 
> 
> 
> --
> Sent from: http://gstreamer-devel.966125.n4.nabble.com/
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