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Hi Folks,
I've built gstreamer 1.18 version on ubuntu 18:
The following pipeline gives this error:
gst-launch-1.0 filesrc location=sintel_trailer-480p.webm ! decodebin ! videoconvert ! nvh264enc ! h264parse ! qtmux ! filesink location=sintel_out.mp4
Setting pipeline to PAUSED ...
0:00:00.982614236 9399 0x558ef3fc9d00 INFO nvh264enc gstnvh264enc.c:307:gst_nv_h264_enc_open:<nvh264enc0> H.264 encoding supported
Pipeline is PREROLLING ...
Got context from element 'nvh264enc0': gst.cuda.context=context, gst.cuda.context=(GstCudaContext)"\(GstCudaContext\)\ cudacontext0", cuda-device-id=(int)0;
Got context from element 'nvh264enc0': gst.gl.GLDisplay=context, gst.gl.GLDisplay=(GstGLDisplay)"\(GstGLDisplayX11\)\ gldisplayx11-0";
0:00:01.334386908 9399 0x7fd4a8014d40 ERROR nvdec gstnvdec.c:1321:gst_nvdec_ensure_gl_context:<nvvp8dec0> failed to create OpenGL context
0:00:01.345283816 9399 0x7fd4a8014d40 INFO nvh264enc gstnvh264enc.c:432:gst_nv_h264_enc_set_src_caps:<nvh264enc0> output caps: video/x-h264, stream-format=(string)byte-stream, alignment=(string)au, level=(string)3.1, profile=(string)main
0:00:01.345860091 9399 0x7fd4a8014d40 ERROR nvdec gstnvdec.c:1321:gst_nvdec_ensure_gl_context:<nvvp8dec0> failed to create OpenGL context
You can see that nvvp8dec complains:
"nvvp8dec0 failed to create OpenGL context"
But encoder successfully creates OpenGL context:
"Got context from element nvh264enc0"
When I leave only decoder nvvp8dec creates OpenGL context successfully:
gst-launch-1.0 filesrc location=sintel_trailer-480p.webm ! decodebin ! fakesink
"Got context from element 'nvvp8dec0'"
...
So it seems nv decoder and nv encoder unable to work together?
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