Hello All:
I try to add a new type in xvimagesink pad, but met some problem, could you
kindly give some advice. Thanks.
There are pad cap for
video sink like "video/x-raw-rgb " and "video/x-raw-yuv";
I try to add a new type to
support another display mode, for example, video driver display the frame
directly without XvPutImage.
1. if
I do not define a new cap type, but use “video/x-raw-yuv” stealthily.
It could work.
That means,
I still use “video/x-raw-rgb” in libgstmpeg2dec, but only provide some
handler/ReferenceID in the buffer instead of YUV data. And xvimagesink parse the
handler/ReferenceID in buffer for display.
2. when
I try to define a new cap type, I got some “Internal data flow error”
I try to
define a new cap type in gstmpeg2dec.c: modify in pad template and
gst_mpeg2dec_negotiate_format()
Also define
the same new cap in xvimagesink.c: modify in pad template and
gst_xvimagesink_get_xv_support()
Seems the
pad negotiation is ok, but fail at “Internal data flow error”.
Detail log as following:
ume@ume-halley:~/work$
gst-launch-0.10 -v playbin uri=file:///home/ume/work/test.m2v
Setting pipeline to PAUSED
...
/playbin0/decodebin0/typefind.src:
caps = video/mpeg, systemstream=(boolean)false, mpegversion=(int)1
….
Pipeline is PREROLLING ...
/playbin0/decodebin0/mpeg2dec0.sink:
caps = video/mpeg, systemstream=(boolean)false, mpegversion=(int)1
/playbin0/decodebin0/mpeg2dec0.src:
caps = video/x-raw-va, format=(fourcc)I420, width=(int)352, height=(int)288,
pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)25/1
ERROR: from element
/playbin0/source: Internal data flow error.
Additional debug info:
gstbasesrc.c(2165):
gst_base_src_loop (): /playbin0/source:
streaming task paused,
reason not-negotiated (-4)
ERROR: pipeline doesn't
want to preroll.
Setting pipeline to NULL
...
/playbin0/decodebin0/mpeg2dec0.src:
caps = NULL
/playbin0/decodebin0/mpeg2dec0.sink:
caps = NULL
/playbin0/decodebin0/typefind.src:
caps = NULL
FREEING pipeline ...
ZHAO,
Halley (Aihua)
Email: halley.zhao[hidden email]
Tel: +86(21)61166476
iNet: 8821-6476
SSG/OTC/UMD 3W033
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