Bug 203465 – [GStreamer] Frequent, reproducible crashes in gst_openh264dec_handle_frame()

• Component: Media
• Status: RESOLVED MOVED

[Michael Catanzaro]

Visit https://www.reddit.com/r/StLouis/comments/dmznic/alderwoman_tell_st_louisans_they_better_pay_in/ in Tech Preview (with 2.26.1) and play the video. It always crashes at 19s. Looks like something going wrong inside GstOpenh264Dec, but I'll leave it to multimedia folks to forward upstream if required....

Program terminated with signal SIGSEGV, Segmentation fault.
#0  __memmove_avx_unaligned_erms () at ../sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S:436
436		VMOVU	(%rsi), %VEC(4)

(gdb) bt full
#0  0x00007effb7499515 in __memmove_avx_unaligned_erms ()
    at ../sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S:436
#1  0x00007efe0c76c694 in memcpy (__len=1280, __src=<optimized out>, __dest=<optimized out>)
    at /usr/include/x86_64-linux-gnu/bits/string_fortified.h:34
        openh264dec = <optimized out>
        map_info = 
            {memory = 0x7efe04028b40 [GstMemory], flags = GST_MAP_READ, data = 0x7efe04704a00 "", size = 48637, maxsize = 48637, user_data = {0x7efe046f6000, 0x7effb43fa940 <_gst_debug_min>, 0xc2ca7764d3988600, 0x7efe0406e580}, _gst_reserved = {0x320e, 0x7efe040714b0, 0x7efd8c189aa8, 0x7efe0406e580}}
        state = 0x7efd8c0c8540
        dst_buf_info = 
                {iBufferStatus = 1, uiInBsTimeStamp = 598, uiOutYuvTimeStamp = 598, UsrData = {sSystemBuffer = {iWidth = 1280, iHeight = 720, iFormat = 23, iStride = {1344, 672}}}}
        ret = <optimized out>
        yuvdata = 
          {0x7efd959e0840 <error: Cannot access memory at address 0x7efd959e0840>, 0x7efd95adf230 <error: Cannot access memory at address 0x7efd95adf230>, 0x7efd95b20c30 <error: Cannot access memory at address 0x7efd95b20c30>}
        flow_status = <optimized out>
        video_frame = 
            {info = {finfo = 0x7effb41a8008 <formats+488>, interlace_mode = 0, flags = (unknown: 0), width = 1280, height = 720, size = 1382400, views = 1, chroma_site = 2, colorimetry = {<No data fields>}, par_n = 1, par_d = 1, fps_n = 30, fps_d = 1, offset = {0, 921600, 1152000, 0}, stride = {1280, 640, 640, 0}, ABI = {abi = {multiview_mode = 0, multiview_flags = (unknown: 0), field_order = (unknown: 0)}, _gst_reserved = {0x0, 0x0, 0x0, 0x0}}}, flags = GST_VIDEO_FRAME_FLAG_NONE, buffer = 0x7efe040b35a0 [GstBuffer], meta = 0x55614d894c20, id = 0, data = {0x7efd9c1d3320, 0x7efd9c2ec740, 0x7efd9c35cf60, 0x55614d48a920}, map = {{memory = 0x7efe04650f20 [GstMemory], flags = GST_MAP_WRITE, data = 0x7efd9c1d3320 "\020\020\022\024\024\026\026\027\026\026\033\037#&)++++,,----.//", '0' <repeats 68 times>, '1' <repeats 16 times>, "2222222233333333", '4' <repeats 11 times>, '5' <repeats 18 times>, '6' <repeats 12 times>, '7' <repeats 15 times>, '6' <repeats 16 times>..., size = 921600, maxsize = 921600, user_data = {0x7efd9c3b2280, 0x7efe0f7fca98, 0x5561000000bc, 0x7effb42f2e18 <gst_object_dispatch_properties_changed+312>}, _gst_reserved = {0x7effb43b2da2, 0x100000001, 0x7efe0f7fca90, 0xc2ca7764d3988600}}, {memory = 0x7efe04651d30 [GstMemory], flags = GST_MAP_WRITE, data = 0x7efd9c2ec740 "\177\177\177\177", '\200' <repeats 36 times>, '\177' <repeats 56 times>, "\200", '\177' <repeats 15 times>, "\200", '\177' <repeats 35 times>, '\200' <repeats 27 times>, '\177' <repeats 23 times>, "\200\201"..., size = 230400, maxsize = 230400, user_data = {0x7efd9c3b2210, 0x7efe0f7fcae0, 0x7efd8c189840, 0x3}, _gst_reserved = {0x7efe0404def0, 0x1, 0xc2ca7764d3988600, 0x7efe0f7fcae0}}, {memory = 0x7efe04651f60 [GstMemory], flags = GST_MAP_WRITE, data = 0x7efd9c35cf60 "\203\203\204\204\206\207\210\210\211\212\213\214\214\214\215\215\215\215\215\215\216\216\216\216", '\217' <repeats 24 times>, "\216\216\216\216\217\217", '\216' <repeats 52 times>, '\215' <repeats 42 times>, "\214\214\214\214\214\214\214\214\214\213\213\212\213\212\211\211\212\212\212\212\212\212\212\212\211", '\212' <repeats 15 times>, "\213\213\213\213\214\213\213\213\213\213\213\213"..., size = 230400, maxsize = 230400, user_data = {0x7efd9c3b21a0, 0x55614d57f530, 0x7effb43fa940 <_gst_debug_min>, 0x7efe0f7fcc68}, _gst_reserved = {0x55614be5db30, 0x7efe0f7fcc68, 0x55614d48a920, 0x7effb6513a23 <g_signal_emit+147>}}, {memory = 0x3000000018, flags = (GST_MAP_FLAG_LAST | unknown: 259968000), data = 0x7efe0f7fcb40 " \241\377KaU", size = 14036162463583995392, maxsize = 93876375232800, user_data = {0x84bf6d0c0, 0x0, 0x55614c000a80, 0x55614be62d30}, _gst_reserved = {0x7effb64288c1 <g_slice_alloc+33>, 0x7efe046f5f70, 0x7effb63f935d <g_str_equal+13>, 0x7efe046f5f70}}}, _gst_reserved = {0x7efe0406e3e0, 0x7efe0406e580, 0x55614c000a80, 0x55614be62d30}}
        actual_width = <optimized out>
        actual_height = <optimized out>
        i = <optimized out>
        p = <optimized out>
        row_stride = 1280
        component_width = 1280
        component_height = 720
        src_width = 1344
        row = 0
        __FUNCTION__ = "gst_openh264dec_handle_frame"
#2  0x00007efe0c76c694 in gst_openh264dec_handle_frame(GstVideoDecoder*, GstVideoCodecFrame*) (decoder=0x7efe0406e580 [GstOpenh264Dec], frame=0x7efe04169330) at ../ext/openh264/gstopenh264dec.cpp:396
        openh264dec = <optimized out>
        map_info = {memory = 0x7efe04028b40 [GstMemory], flags = GST_MAP_READ, data = 0x7efe04704a00 "", size = 48637, maxsize = 48637, user_data = {0x7efe046f6000, 0x7effb43fa940 <_gst_debug_min>, 0xc2ca7764d3988600, 0x7efe0406e580}, _gst_reserved = {0x320e, 0x7efe040714b0, 0x7efd8c189aa8, 0x7efe0406e580}}
        state = 0x7efd8c0c8540
        dst_buf_info = {iBufferStatus = 1, uiInBsTimeStamp = 598, uiOutYuvTimeStamp = 598, UsrData = {sSystemBuffer = {iWidth = 1280, iHeight = 720, iFormat = 23, iStride = {1344, 672}}}}
        ret = <optimized out>
        yuvdata = {0x7efd959e0840 <error: Cannot access memory at address 0x7efd959e0840>, 0x7efd95adf230 <error: Cannot access memory at address 0x7efd95adf230>, 0x7efd95b20c30 <error: Cannot access memory at address 0x7efd95b20c30>}
        flow_status = <optimized out>
        video_frame = {info = {finfo = 0x7effb41a8008 <formats+488>, interlace_mode = 0, flags = (unknown: 0), width = 1280, height = 720, size = 1382400, views = 1, chroma_site = 2, colorimetry = {<No data fields>}, par_n = 1, par_d = 1, fps_n = 30, fps_d = 1, offset = {0, 921600, 1152000, 0}, stride = {1280, 640, 640, 0}, ABI = {abi = {multiview_mode = 0, multiview_flags = (unknown: 0), field_order = (unknown: 0)}, _gst_reserved = {0x0, 0x0, 0x0, 0x0}}}, flags = GST_VIDEO_FRAME_FLAG_NONE, buffer = 0x7efe040b35a0 [GstBuffer], meta = 0x55614d894c20, id = 0, data = {0x7efd9c1d3320, 0x7efd9c2ec740, 0x7efd9c35cf60, 0x55614d48a920}, map = {{memory = 0x7efe04650f20 [GstMemory], flags = GST_MAP_WRITE, data = 0x7efd9c1d3320 "\020\020\022\024\024\026\026\027\026\026\033\037#&)++++,,----.//", '0' <repeats 68 times>, '1' <repeats 16 times>, "2222222233333333", '4' <repeats 11 times>, '5' <repeats 18 times>, '6' <repeats 12 times>, '7' <repeats 15 times>, '6' <repeats 16 times>..., size = 921600, maxsize = 921600, user_data = {0x7efd9c3b2280, 0x7efe0f7fca98, 0x5561000000bc, 0x7effb42f2e18 <gst_object_dispatch_properties_changed+312>}, _gst_reserved = {0x7effb43b2da2, 0x100000001, 0x7efe0f7fca90, 0xc2ca7764d3988600}}, {memory = 0x7efe04651d30 [GstMemory], flags = GST_MAP_WRITE, data = 0x7efd9c2ec740 "\177\177\177\177", '\200' <repeats 36 times>, '\177' <repeats 56 times>, "\200", '\177' <repeats 15 times>, "\200", '\177' <repeats 35 times>, '\200' <repeats 27 times>, '\177' <repeats 23 times>, "\200\201"..., size = 230400, maxsize = 230400, user_data = {0x7efd9c3b2210, 0x7efe0f7fcae0, 0x7efd8c189840, 0x3}, _gst_reserved = {0x7efe0404def0, 0x1, 0xc2ca7764d3988600, 0x7efe0f7fcae0}}, {memory = 0x7efe04651f60 [GstMemory], flags = GST_MAP_WRITE, data = 0x7efd9c35cf60 "\203\203\204\204\206\207\210\210\211\212\213\214\214\214\215\215\215\215\215\215\216\216\216\216", '\217' <repeats 24 times>, "\216\216\216\216\217\217", '\216' <repeats 52 times>, '\215' <repeats 42 times>, "\214\214\214\214\214\214\214\214\214\213\213\212\213\212\211\211\212\212\212\212\212\212\212\212\211", '\212' <repeats 15 times>, "\213\213\213\213\214\213\213\213\213\213\213\213"..., size = 230400, maxsize = 230400, user_data = {0x7efd9c3b21a0, 0x55614d57f530, 0x7effb43fa940 <_gst_debug_min>, 0x7efe0f7fcc68}, _gst_reserved = {0x55614be5db30, 0x7efe0f7fcc68, 0x55614d48a920, 0x7effb6513a23 <g_signal_emit+147>}}, {memory = 0x3000000018, flags = (GST_MAP_FLAG_LAST | unknown: 259968000), data = 0x7efe0f7fcb40 " \241\377KaU", size = 14036162463583995392, maxsize = 93876375232800, user_data = {0x84bf6d0c0, 0x0, 0x55614c000a80, 0x55614be62d30}, _gst_reserved = {0x7effb64288c1 <g_slice_alloc+33>, 0x7efe046f5f70, 0x7effb63f935d <g_str_equal+13>, 0x7efe046f5f70}}}, _gst_reserved = {0x7efe0406e3e0, 0x7efe0406e580, 0x55614c000a80, 0x55614be62d30}}
        actual_width = <optimized out>
        actual_height = <optimized out>
        i = <optimized out>
        p = <optimized out>
        row_stride = 1280
        component_width = 1280
        component_height = 720
        src_width = 1344
        row = 0
        __FUNCTION__ = "gst_openh264dec_handle_frame"
#3  0x00007effb413437b in gst_video_decoder_decode_frame (decoder=decoder@entry=0x7efe0406e580 [GstOpenh264Dec], frame=0x55614be62d30) at ../gst-libs/gst/video/gstvideodecoder.c:3402
        priv = 0x7efe0406e3e0
        decoder_class = 0x7efd8c00c170
        ret = GST_FLOW_OK
        __func__ = "gst_video_decoder_decode_frame"
#4  0x00007effb41394f8 in gst_video_decoder_chain_forward (decoder=decoder@entry=0x7efe0406e580 [GstOpenh264Dec], buf=buf@entry=0x7efdb0107ea0 [GstBuffer], at_eos=at_eos@entry=0) at ../gst-libs/gst/video/gstvideodecoder.c:2123
        was_keyframe = <optimized out>
        priv = 0x7efe0406e3e0
        klass = <optimized out>
        ret = GST_FLOW_OK
        __func__ = "gst_video_decoder_chain_forward"
#5  0x00007effb4139c09 in gst_video_decoder_chain (pad=<optimized out>, parent=<optimized out>, buf=0x7efdb0107ea0 [GstBuffer]) at ../gst-libs/gst/video/gstvideodecoder.c:2438
        decoder = 0x7efe0406e580 [GstOpenh264Dec]
        ret = GST_FLOW_OK
        __func__ = "gst_video_decoder_chain"
#6  0x00007effb433a2ff in gst_pad_chain_data_unchecked (pad=pad@entry=0x7efd8c189a90 [GstPad], type=type@entry=4112, data=data@entry=0x7efdb0107ea0) at ../gst/gstpad.c:4327
        chainfunc = 0x7effb41398d0 <gst_video_decoder_chain>
        ret = <optimized out>
        parent = 0x7efe0406e580 [GstOpenh264Dec]
        handled = 0
        __func__ = "gst_pad_chain_data_unchecked"
#7  0x00007effb433c431 in gst_pad_push_data (pad=pad@entry=0x7efd8c189840 [GstPad], type=type@entry=4112, data=data@entry=0x7efdb0107ea0) at ../gst/gstpad.c:4583
        peer = 0x7efd8c189a90 [GstPad]
        ret = GST_FLOW_OK
        handled = 0
        __func__ = "gst_pad_push_data"
#8  0x00007effb43432e3 in gst_pad_push (pad=0x7efd8c189840 [GstPad], buffer=0x7efdb0107ea0 [GstBuffer]) at ../gst/gstpad.c:4702
        res = <optimized out>
        __func__ = "gst_pad_push"
#9  0x00007effb44443c0 in gst_base_transform_chain (pad=<optimized out>, parent=0x7efd98015000 [GstCapsFilter], buffer=<optimized out>) at ../libs/gst/base/gstbasetransform.c:2330
        position_out = <optimized out>
        trans = 0x7efd98015000 [GstCapsFilter]
        klass = 0x7efd9800fb70
        priv = 0x7efd98014f30
        ret = <optimized out>
        position = 20099999999 [0:00:20.099999999]
        timestamp = <optimized out>
        duration = <optimized out>
        outbuf = 0x7efdb0107ea0 [GstBuffer]
        __func__ = "gst_base_transform_chain"
#10 0x00007effb433a2ff in gst_pad_chain_data_unchecked (pad=pad@entry=0x55614d57f530 [GstPad], type=type@entry=4112, data=data@entry=0x7efdb0107ea0) at ../gst/gstpad.c:4327
        chainfunc = 0x7effb44441f0 <gst_base_transform_chain>
        ret = <optimized out>
        parent = 0x7efd98015000 [GstCapsFilter]
        handled = 0
        __func__ = "gst_pad_chain_data_unchecked"
#11 0x00007effb433c431 in gst_pad_push_data (pad=pad@entry=0x55614d57f2e0 [GstPad], type=type@entry=4112, data=data@entry=0x7efdb0107ea0) at ../gst/gstpad.c:4583
        peer = 0x55614d57f530 [GstPad]
        ret = GST_FLOW_OK
        handled = 0
        __func__ = "gst_pad_push_data"
#12 0x00007effb43432e3 in gst_pad_push (pad=0x55614d57f2e0 [GstPad], buffer=buffer@entry=0x7efdb0107ea0 [GstBuffer]) at ../gst/gstpad.c:4702
        res = <optimized out>
        __func__ = "gst_pad_push"
#13 0x00007effb4427c37 in gst_base_parse_push_frame (parse=parse@entry=0x7efe0406a260 [GstH264Parse], frame=frame@entry=0x7efe046f5d90) at ../libs/gst/base/gstbaseparse.c:2580
        ret = <optimized out>
        last_start = <optimized out>
        last_stop = 20099999999 [0:00:20.099999999]
        klass = <optimized out>
        buffer = 0x7efdb0107ea0 [GstBuffer]
        size = 48637
        __func__ = "gst_base_parse_push_frame"
#14 0x00007effb442aa3b in gst_base_parse_handle_and_push_frame (frame=0x7efe046f5d90, parse=0x7efe0406a260 [GstH264Parse]) at ../libs/gst/base/gstbaseparse.c:2394
        offset = <optimized out>
        buffer = 0x7efe04655120 [None]
        __func__ = "gst_base_parse_handle_and_push_frame"
        ret = GST_FLOW_OK
        __func__ = "gst_base_parse_finish_frame"
#15 0x00007effb442aa3b in gst_base_parse_finish_frame (parse=parse@entry=0x7efe0406a260 [GstH264Parse], frame=frame@entry=0x7efe046f5d90, size=<optimized out>) at ../libs/gst/base/gstbaseparse.c:2738
        ret = GST_FLOW_OK
        __func__ = "gst_base_parse_finish_frame"
#16 0x00007efe0c7d03df in gst_h264_parse_handle_frame_packetized (frame=0x7efe046f5d90, parse=0x7efe0406a260 [GstH264Parse]) at ../gst/videoparsers/gsth264parse.c:1147
        h264parse = 0x7efe0406a260 [GstH264Parse]
        buffer = 0x7efdb0107ea0 [GstBuffer]
        ret = <optimized out>
        nalu = {ref_idc = 0, type = 0, idr_pic_flag = 0 '\000', size = 0, offset = 0, sc_offset = 0, valid = 0, data = 0x0, header_bytes = 0 '\000', extension_type = 0 '\000', extension = {mvc = {non_idr_flag = 0 '\000', priority_id = 0 '\000', view_id = 0, temporal_id = 0 '\000', anchor_pic_flag = 0 '\000', inter_view_flag = 0 '\000'}}}
        nl = <optimized out>
        parse_res = GST_H264_PARSER_ERROR
        map = {memory = 0x7efd80e94000 [GstMemory], flags = GST_MAP_READ, data = 0x7efd80e94078 "", size = 48586, maxsize = 48586, user_data = {0x0, 0x7efdb0107ea0, 0x7effb43009f7 <gst_buffer_copy_into+967>, 0x7efe0f7fd430}, _gst_reserved = {0x7efe0f7fd3a8, 0x7efdb0107ea0, 0x48, 0x7efe0f7fd3a8}}
        left = 48586
        __func__ = "gst_h264_parse_handle_frame_packetized"
        h264parse = 0x7efe0406a260 [GstH264Parse]
        buffer = <optimized out>
        map = {memory = 0x7efd80e94000 [GstMemory], flags = GST_MAP_READ, data = 0x7efd80e94078 "", size = 48586, maxsize = 48586, user_data = {0x0, 0x7efdb0107ea0, 0x7effb43009f7 <gst_buffer_copy_into+967>, 0x7efe0f7fd430}, _gst_reserved = {0x7efe0f7fd3a8, 0x7efdb0107ea0, 0x48, 0x7efe0f7fd3a8}}
        data = <optimized out>
        size = <optimized out>
        current_off = 0
        drain = <optimized out>
        nonext = <optimized out>
        nalparser = <optimized out>
        nalu = {ref_idc = 64641, type = 46138, idr_pic_flag = 255 '\377', size = 0, offset = 0, sc_offset = 260035144, valid = 32510, data = 0x7effb64fbb3d <g_object_unref+61> "\215K\377\211\302\211\330\360A\017\261\f$u\340\203\373\002u\005\203\342\001uj[]A\\A]A^Ð\213\065\332&\004", header_bytes = 96 '`', extension_type = 42 '*', extension = {mvc = {non_idr_flag = 137 '\211', priority_id = 77 'M', view_id = 21857, temporal_id = 0 '\000', anchor_pic_flag = 0 '\000', inter_view_flag = 32 ' '}}}
        pres = <optimized out>
        framesize = <optimized out>
        ret = <optimized out>
        au_complete = <optimized out>
        __func__ = "gst_h264_parse_handle_frame"
#17 0x00007efe0c7d03df in gst_h264_parse_handle_frame (parse=0x7efe0406a260 [GstH264Parse], frame=0x7efe046f5d90, skipsize=<optimized out>) at ../gst/videoparsers/gsth264parse.c:1193
        h264parse = 0x7efe0406a260 [GstH264Parse]
        buffer = <optimized out>
        map = {memory = 0x7efd80e94000 [GstMemory], flags = GST_MAP_READ, data = 0x7efd80e94078 "", size = 48586, maxsize = 48586, user_data = {0x0, 0x7efdb0107ea0, 0x7effb43009f7 <gst_buffer_copy_into+967>, 0x7efe0f7fd430}, _gst_reserved = {0x7efe0f7fd3a8, 0x7efdb0107ea0, 0x48, 0x7efe0f7fd3a8}}
        data = <optimized out>
        size = <optimized out>
        current_off = 0
        drain = <optimized out>
        nonext = <optimized out>
        nalparser = <optimized out>
        nalu = {ref_idc = 64641, type = 46138, idr_pic_flag = 255 '\377', size = 0, offset = 0, sc_offset = 260035144, valid = 32510, data = 0x7effb64fbb3d <g_object_unref+61> "\215K\377\211\302\211\330\360A\017\261\f$u\340\203\373\002u\005\203\342\001uj[]A\\A]A^Ð\213\065\332&\004", header_bytes = 96 '`', extension_type = 42 '*', extension = {mvc = {non_idr_flag = 137 '\211', priority_id = 77 'M', view_id = 21857, temporal_id = 0 '\000', anchor_pic_flag = 0 '\000', inter_view_flag = 32 ' '}}}
        pres = <optimized out>
        framesize = <optimized out>
        ret = <optimized out>
        au_complete = <optimized out>
        __func__ = "gst_h264_parse_handle_frame"
#18 0x00007effb4422766 in gst_base_parse_handle_buffer (parse=parse@entry=0x7efe0406a260 [GstH264Parse], buffer=<optimized out>, skip=skip@entry=0x7efe0f7fd3a8, flushed=flushed@entry=0x7efe0f7fd3ac) at ../libs/gst/base/gstbaseparse.c:2202
        klass = 0x7efdb8008e40
        frame = 0x7efe046f5d90
        ret = <optimized out>
        __func__ = "gst_base_parse_handle_buffer"
#19 0x00007effb44288be in gst_base_parse_chain (pad=<optimized out>, parent=<optimized out>, buffer=<optimized out>) at ../libs/gst/base/gstbaseparse.c:3287
        flush = 0
        updated_prev_pts = <optimized out>
        bclass = <optimized out>
        parse = 0x7efe0406a260 [GstH264Parse]
        ret = GST_FLOW_OK
        old_ret = <optimized out>
        tmpbuf = <optimized out>
        skip = 0
        min_size = <optimized out>
        av = 48586
        pts = 20066666666 [0:00:20.066666666]
        dts = <optimized out>
        __func__ = "gst_base_parse_chain"
#20 0x00007effb433a2ff in gst_pad_chain_data_unchecked (pad=pad@entry=0x55614d57f090 [GstPad], type=type@entry=4112, data=data@entry=0x7efdd8051ea0) at ../gst/gstpad.c:4327
        chainfunc = 0x7effb4428080 <gst_base_parse_chain>
        ret = <optimized out>
        parent = 0x7efe0406a260 [GstH264Parse]
        handled = 0
        __func__ = "gst_pad_chain_data_unchecked"
#21 0x00007effb433c431 in gst_pad_push_data (pad=pad@entry=0x55614d8960e0 [GstPad], type=type@entry=4112, data=data@entry=0x7efdd8051ea0) at ../gst/gstpad.c:4583
        peer = 0x55614d57f090 [GstPad]
        ret = GST_FLOW_OK
        handled = 0
        __func__ = "gst_pad_push_data"
#22 0x00007effb43432e3 in gst_pad_push (pad=0x55614d8960e0 [GstPad], buffer=0x7efdd8051ea0 [GstBuffer]) at ../gst/gstpad.c:4702
        res = <optimized out>
        __func__ = "gst_pad_push"
#23 0x00007effb433a2ff in gst_pad_chain_data_unchecked (pad=pad@entry=0x55614d88fcd0 [GstPad], type=type@entry=4112, data=data@entry=0x7efdd8051ea0) at ../gst/gstpad.c:4327
        chainfunc = 0x7eff3c562210 <gst_type_find_element_chain>
        ret = <optimized out>
        parent = 0x55614d582440 [GstTypeFindElement]
        handled = 0
        __func__ = "gst_pad_chain_data_unchecked"
#24 0x00007effb433c431 in gst_pad_push_data (pad=pad@entry=0x55614d8871b0 [GstProxyPad], type=type@entry=4112, data=data@entry=0x7efdd8051ea0) at ../gst/gstpad.c:4583
        peer = 0x55614d88fcd0 [GstPad]
        ret = GST_FLOW_OK
        handled = 0
        __func__ = "gst_pad_push_data"
#25 0x00007effb43432e3 in gst_pad_push (pad=pad@entry=0x55614d8871b0 [GstProxyPad], buffer=buffer@entry=0x7efdd8051ea0 [GstBuffer]) at ../gst/gstpad.c:4702
        res = <optimized out>
        __func__ = "gst_pad_push"
#26 0x00007effb432759b in gst_proxy_pad_chain_default (pad=<optimized out>, parent=<optimized out>, buffer=0x7efdd8051ea0 [GstBuffer]) at ../gst/gstghostpad.c:127
        res = <optimized out>
        internal = 0x55614d8871b0 [GstProxyPad]
        __func__ = "gst_proxy_pad_chain_default"
#27 0x00007effb433a2ff in gst_pad_chain_data_unchecked (pad=pad@entry=0x55614d892a60 [GstGhostPad], type=type@entry=4112, data=data@entry=0x7efdd8051ea0) at ../gst/gstpad.c:4327
        chainfunc = 0x7effb43274d0 <gst_proxy_pad_chain_default>
        ret = <optimized out>
        parent = 0x7efe0402a060 [GstDecodeBin]
        handled = 0
        __func__ = "gst_pad_chain_data_unchecked"
#28 0x00007effb433c431 in gst_pad_push_data (pad=pad@entry=0x55614d8927e0 [GstGhostPad], type=type@entry=4112, data=data@entry=0x7efdd8051ea0) at ../gst/gstpad.c:4583
        peer = 0x55614d892a60 [GstGhostPad]
        ret = GST_FLOW_OK
        handled = 0
        __func__ = "gst_pad_push_data"
#29 0x00007effb43432e3 in gst_pad_push (pad=pad@entry=0x55614d8927e0 [GstGhostPad], buffer=buffer@entry=0x7efdd8051ea0 [GstBuffer]) at ../gst/gstpad.c:4702
        res = <optimized out>
        __func__ = "gst_pad_push"
#30 0x00007effb432759b in gst_proxy_pad_chain_default (pad=pad@entry=0x55614d886f50 [GstProxyPad], parent=<optimized out>, buffer=buffer@entry=0x7efdd8051ea0 [GstBuffer]) at ../gst/gstghostpad.c:127
        res = <optimized out>
        internal = 0x55614d8927e0 [GstGhostPad]
        __func__ = "gst_proxy_pad_chain_default"
#31 0x00007effb82090ed in webkitMediaSrcChain(GstPad*, GstObject*, GstBuffer*) (pad=0x55614d886f50 [GstProxyPad], parent=0x55614d8927e0 [GstGhostPad], buffer=0x7efdd8051ea0 [GstBuffer]) at ../Source/WebCore/platform/graphics/gstreamer/mse/WebKitMediaSourceGStreamer.cpp:250
        self = {m_ptr = 0x55614d85c0d0 [WebKitMediaSrc]}
#32 0x00007effb433a2ff in gst_pad_chain_data_unchecked (pad=pad@entry=0x55614d886f50 [GstProxyPad], type=type@entry=4112, data=data@entry=0x7efdd8051ea0) at ../gst/gstpad.c:4327
        chainfunc = 0x7effb8209080 <webkitMediaSrcChain(GstPad*, GstObject*, GstBuffer*)>
        ret = <optimized out>
        parent = 0x55614d8927e0 [GstGhostPad]
        handled = 0
        __func__ = "gst_pad_chain_data_unchecked"
#33 0x00007effb433c431 in gst_pad_push_data (pad=pad@entry=0x55614d4a8e50 [GstPad], type=type@entry=4112, data=data@entry=0x7efdd8051ea0) at ../gst/gstpad.c:4583
        peer = 0x55614d886f50 [GstProxyPad]
        ret = GST_FLOW_OK
        handled = 0
        __func__ = "gst_pad_push_data"
#34 0x00007effb43432e3 in gst_pad_push (pad=pad@entry=0x55614d4a8e50 [GstPad], buffer=0x7efdd8051ea0 [GstBuffer]) at ../gst/gstpad.c:4702
        res = <optimized out>
        __func__ = "gst_pad_push"
#35 0x00007effb443f825 in gst_base_src_loop (pad=0x55614d4a8e50 [GstPad]) at ../libs/gst/base/gstbasesrc.c:2974
        src = 0x55614d863940 [GstAppSrc]
        buf = 0x7efdd8051ea0 [GstBuffer]
        ret = <optimized out>
        position = <optimized out>
        eos = 0
        blocksize = <optimized out>
        pending_events = <optimized out>
        tmp = <optimized out>
        __func__ = "gst_base_src_loop"
#36 0x00007effb43719f7 in gst_task_func (task=0x55614d379050 [GstTask]) at ../gst/gsttask.c:328
        lock = 0x55614d4a8ec0
        tself = 0x55614d2a5990
        priv = 0x55614d379000
        __func__ = "gst_task_func"
#37 0x00007effb6434694 in g_thread_pool_thread_proxy (data=<optimized out>) at ../glib/gthreadpool.c:308
        task = 0x55614d372e90
        pool = <optimized out>
#38 0x00007effb6433f41 in g_thread_proxy (data=0x55614d2a5990) at ../glib/gthread.c:805
        thread = 0x55614d2a5990
        __func__ = "g_thread_proxy"
#39 0x00007effb3f3d5e2 in start_thread (arg=<optimized out>) at pthread_create.c:479
        ret = <optimized out>
        pd = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139629646833408, 1806756859576380293, 140729806886478, 140729806886479, 139629646830912, 139629646833408, -1950343183664878715, -1950757734184981627}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
#40 0x00007effb7433413 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

[Philippe Normand]

I haven't yet tried with openh264 because it's not in the Runtime I use currently. Even gst-libav chokes on that h264 video... I think this would be worth investigation with gst-play-1.0 first.

[Michael Catanzaro]

I'm not sure why you'd want to use a different runtime with different codecs and different bugs, but we wound up settling on OpenH264 for the official runtime. So unless you don't want to support Tech Preview anymore, I would recommend adjusting what you're using to match.

[Philippe Normand]

Do we currently use openh264 in jhbuild? No.
The WIP flatpak SDK I'm using replicates what we have in jhbuild currently, for convenience, and possible easy migration path out of jhbuild...

I don't disagree about the validity of the issue reported here, I'm only stating this video potentially presents multiple issues across different video decoders. There's no need to remind me about the decisions you took for the GNOME runtime.

[Michael Catanzaro]

FWIW: just hit this crash again on youtube.com

[Michael Catanzaro]

I think this is one of the biggest web process crashers right now.

[Philippe Normand]

This is happening only with openh264 2.0.0, not with current master (4b2a2f02ba320a76163b0452086e542453b8ee49). I can't do a bisect because they use merge commits all over the place.

So if you feel brave, update your Flatpak SDK accordingly and ask an upstream release. In any case this isn't a WebKit issue, so closing.

[Michael Catanzaro]

Thanks for investigating!

[Michael Catanzaro]

Moved to https://gitlab.com/freedesktop-sdk/freedesktop-sdk/issues/922

[Michael Catanzaro]

(In reply to Philippe Normand from comment #6)
> This is happening only with openh264 2.0.0, not with current master
> (4b2a2f02ba320a76163b0452086e542453b8ee49). I can't do a bisect because they
> use merge commits all over the place.

Rob has created https://github.com/cisco/openh264/issues/3218 to request an update.

[Michael Catanzaro]

GStreamer issue: https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/issues/1192