Hi
Have a working transcoder pipeline that uses avlib to do the initial AVC decoding which is followed by a homebrewed HEVC encoder, with its sink pad defined as:
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-raw, "
"format = (string) { " FORMATS " }, "
"framerate = (fraction) [ 0/1, MAX], "
"width = (int) [ 16, MAX ], " "height = (int) [ 16, MAX ]")
);
Trying to replace the avlib AVC decoder with another homebrewed version and am seeing endless calls to encoder’s video_encoder_class->getcaps method, which returns the following:
returning video/x-raw, framerate=(fraction)[ 0/1, 2147483647/1 ], width=(int)[ 16, 2147483647 ], height=(int)[ 16, 2147483647 ], format=(string){ I420, I420_10LE }
Decoder’s source pad is defined as follow:
static GstStaticPadTemplate gst_avcdec_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-raw,"
"width = (int)[ 16, MAX ],"
"height = (int)[ 16, MAX ],"
"framerate = (fraction) [ 0/1, MAX ],"
"format = (string) {I420}"
)
);
And is setup in the following manner:
In its init function, I have:
…
avcdec->srcpad = gst_pad_new_from_static_template (&gst_avcdec_src_template, "src");
GST_PAD_SET_PROXY_CAPS (avcdec->srcpad);
gst_pad_set_query_function (avcdec->srcpad,GST_DEBUG_FUNCPTR (gst_avcdec_src_query));
gst_pad_use_fixed_caps(avcdec->srcpad);
gst_element_add_pad (GST_ELEMENT (avcdec), avcdec->srcpad);
…
In source pad query function I do the following:
…
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_CAPS:{
GstCaps *caps;
GST_DEBUG_OBJECT (avcdec, "Using src template caps");
caps = gst_static_pad_template_get_caps (&gst_avcdec_src_template);
//caps = gst_pad_get_pad_template_caps(pad);
gst_query_set_caps_result (query, caps);
gst_caps_unref (caps);
break;
}
default:
res = gst_pad_query_default (pad, parent, query);
break;
}
return res;
…
And on sink pad’s cap event I do this:
…
//avcdec->vinfo.chroma_site=GST_VIDEO_CHROMA_SITE_MPEG2;
// avcdec->vinfo.colorimetry.matrix=GST_VIDEO_COLOR_MATRIX_BT709;
// avcdec->vinfo.interlace_mode=GST_VIDEO_INTERLACE_MODE_PROGRESSIVE;
//avcdec->vinfo.size=avcdec->vinfo.width*avcdec->vinfo.height;
gst_video_info_set_format(&avcdec->vinfo,GST_VIDEO_FORMAT_I420,avcdec->vinfo.width,avcdec->vinfo.height);
gst_pad_set_caps (avcdec->srcpad, gst_video_info_to_caps(&avcdec->vinfo));
…
It should be noted that I can dump proper YUV frames into filesink element.
By the looks of it I am missing something, any help or pointers would be appreciated.
Cheers,
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