[x265] no SPS/PPS yet, * will be dropped

[Tom Vaughan]

There are multiple types of NAL units.  All NAL units do not contain video
slices (which make up frames... for x265 we use only 1 slice per frame
today).  Your code removed all non-picture NAL units, including the SPS
(Sequence Parameter Set) and PPS (Picture Parameter Set), which are an
essential part of the bitstream.  Without the SPS and PPS, a decoder can’t
decode the slices.



See http://www.codeproject.com/Tips/896030/The-Structure-of-HEVC-Video for
a decent explanation.



Your code needs to check the NAL unit type before proceeding to check the
frame size.



Tom



*From:* x265-devel [mailto:x265-devel-bounces at videolan.org] *On Behalf
Of *Dolevo
Jay
*Sent:* Thursday, August 11, 2016 2:28 PM
*To:* Development for x265
*Subject:* Re: [x265] no SPS/PPS yet, * will be dropped



Sorry for my previous unfinished email.  Let me continue here:



After encoding some frames, I get the bitstream in dumpfileEncodedData. In
order to verify that this is a valid bitstream, I wanted to play this file
with gstreamer (just for easiness).  I run the following pipeline:



GST_DEBUG=h265*:4 gst-launch-1.0 filesrc location=dumpedEncodedStream.265 !
h265parse ! fakesink



I get the following messages from Gstreamer:



Setting pipeline to PAUSED ...

Pipeline is PREROLLING ...

0:00:00.026579000 31834 0x7fd3ac8289e0 WARN               h265parse
gsth265parse.c:981:gst_h265_parse_handle_frame:<h265parse0> no SPS/PPS yet,
nal Type: 19 SLICE_IDR_W_RADL, Size: 344694 will be dropped

0:00:00.026784000 31834 0x7fd3ac8289e0 WARN               h265parse
gsth265parse.c:981:gst_h265_parse_handle_frame:<h265parse0> no SPS/PPS yet,
nal Type: 1 Slice_TRAIL_R, Size: 61343 will be dropped

0:00:00.026922000 31834 0x7fd3ac8289e0 WARN               h265parse
gsth265parse.c:981:gst_h265_parse_handle_frame:<h265parse0> no SPS/PPS yet,
nal Type: 1 Slice_TRAIL_R, Size: 77539 will be dropped

0:00:00.027144000 31834 0x7fd3ac8289e0 WARN               h265parse
gsth265parse.c:981:gst_h265_parse_handle_frame:<h265parse0> no SPS/PPS yet,
nal Type: 1 Slice_TRAIL_R, Size: 80666 will be dropped



So, my frames are being dropped for some reason. Could anyone shed some
light what the problem would be?



Thanks in advance,

Regards


------------------------------

*From:* x265-devel <x265-devel-bounces at videolan.org> on behalf of Dolevo
Jay <cmst at live.com>
*Sent:* Thursday, August 11, 2016 9:23:26 PM
*To:* x265-devel at videolan.org
*Subject:* [x265] no SPS/PPS yet, * will be dropped



Hi all,



In my encoder application, I initialize the encoder as follows:



    param = x265_param_alloc();

    x265_param_default(param);

    x265_param_default_preset(param, "ultrafast", "zerolatency");

    param->fpsNum = 25;

    param->fpsDenom = 1;

    param->bRepeatHeaders = true;

    param->internalCsp = X265_CSP_I420;

    param->sourceWidth = aWidth;

    param->sourceHeight = aHeight;



    y_size = param->sourceWidth * param->sourceHeight;



    param->logLevel = X265_LOG_FULL;



    encoder = x265_encoder_open(param);

    if (NULL == encoder) {

        print*Log*("[X265] x265_encoder_open err");

        return;

    }

    param->internalCsp = X265_CSP_I420;



    pic_in = x265_picture_alloc();

    x265_picture_init(param, pic_in);

    pic_in->planes[0] = new char[32000000];

    pic_in->planes[1] = new char[32000000];

    pic_in->planes[2] = new char[32000000];

    pic_in->stride[0] = aWidth;

    pic_in->stride[1] = aWidth;

    pic_in->stride[2] = aWidth;



    pic_out = x265_picture_alloc();

    x265_picture_init(param, pic_out);





Then, I apply the following function for each incoming frame:



    int frame_size = 0;



    x265_picture pic_out1;

    frame_size = x265_encoder_encode(encoder, &pNals, &iNal, pic_in, NULL);

    if (frame_size < 0) {

        print*Log*("[ERROR] H265: x265_encoder_encode failed.");

        return;

    }

    if (frame_size > 0) {

        memcpy(aFramebuffer, pNals[0].payload, pNals[0].sizeBytes);

        *aFrameBufferSize = pNals[0].sizeBytes;

    }



    dumpfileEncodedData.write((const char *)aFramebuffer, *aFrameBufferSize);





Just to debug the encoded bitstream, I dump the data into a file
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