v4l2src x265enc with Redistribute latency... no image show

[Nicolas Dufresne]

Le vendredi 23 mars 2018 à 23:06 -0700, Erickson.LU a écrit :
> I tried the pipline /"GST_DEBUG=4 gst-launch-1.0 videotestsrc !
> "video/x-raw,
> format=(string)I420" ! x265enc ! avdec_h265 ! autovideosink"/. It
> worked
> 
> *But , pipline*
> /GST_DEBUG=3 gst-launch-1.0 v4l2src  device="/dev/video0" num-
> buffers=300 !
> "video/x-raw, format=(string)I420, width=(int)800, height=(int)600,
> pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive,
> framerate=(fraction)30/1" ! x265enc ! avdec_h265 ! xvimagesink /
> *or*
> /GST_DEBUG=3 gst-launch-1.0 v4l2src  device="/dev/video0" num-
> buffers=300 !
> "video/x-raw, format=(string)I420, width=(int)800, height=(int)600,
> pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive,
> framerate=(fraction)30/1" ! x265enc ! avdec_h265 ! autovideosink/
> *did not.*
> 
> They just leave a warning info 
> /0:00:00.568824628 16861      0x1dd08a0 WARN          v4l2bufferpool
> gstv4l2bufferpool.c:540:gst_v4l2_buffer_pool_set_config:<v4l2src0:poo
> l:src>
> libv4l2 converter detected, disabling CREATE_BUFS/
> 
> I can use /*gst-launch-1.0 v4l2src ! "video/x-raw,
> format=(string)I420" !
> autovideosink*/ to show the camera.

No idea why this makes a difference. Though, assuming CREATE_BUFS is
disabled and it stalls, it would be x265enc does not request enough
buffers. Meanwhile, you can workaround by not letting libv4l2 decode
jpegs like it does now:

  v4l2src ! jpegdec ! x265enc ! ...

> 
> But i really need the H265 encode, someone said it's the buffer
> problem or
> gstreamer bug, but i can't fixed it. Could you show me something i
> can fix
> that thing.
> Truly Thanks...
> 
> 
> 
> --
> Sent from: http://gstreamer-devel.966125.n4.nabble.com/
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