vah264dec: error when seeking

When seeking on some h264 media files I get below output followed by Internal data stream error and playback stops. Mainly happens on matroska files. I am using GStreamer 1.18.1 (also happens on 1.18.0) on Linux.

I am not sure what is causing this as it happens with various h264 decoders. I am doing playback and seeking through GstPlayer. So maybe its related to the player (or playbin) itself or some h264 parser problem.

• This is what happens with vah264dec:

0:00:37.648937382 194908 0x7f46940a8800 WARN             h264decoder gsth264picture.c:364:gst_h264_dpb_get_short_ref_by_pic_num: No short term reference picture for 12
0:00:37.648969185 194908 0x7f46940a8800 WARN             h264decoder gsth264decoder.c:2361:modify_ref_pic_list:<vah264dec0> Malformed stream, no pic num 12
0:00:37.648993473 194908 0x7f46940a8800 WARN            videodecoder gstvideodecoder.c:4327:_gst_video_decoder_error:<vah264dec0> error: Failed to decode data
0:00:37.649050616 194908 0x7f46940a8800 WARN               vadecoder gstvadecoder.c:700:gst_va_decode_picture_free: VABufferID are leaked
0:00:37.649800062 194908 0x7f46940a8800 WARN             h264decoder gsth264picture.c:364:gst_h264_dpb_get_short_ref_by_pic_num: No short term reference picture for 13
0:00:37.649837240 194908 0x7f46940a8800 WARN             h264decoder gsth264decoder.c:2361:modify_ref_pic_list:<vah264dec0> Malformed stream, no pic num 13
0:00:37.649858012 194908 0x7f46940a8800 WARN            videodecoder gstvideodecoder.c:4327:_gst_video_decoder_error:<vah264dec0> error: Failed to decode data
0:00:37.649936378 194908 0x7f46940a8800 WARN               vadecoder gstvadecoder.c:700:gst_va_decode_picture_free: VABufferID are leaked
0:00:37.662780979 194908 0x7f46940a8800 WARN             h264decoder gsth264picture.c:364:gst_h264_dpb_get_short_ref_by_pic_num: No short term reference picture for 14
0:00:37.662853082 194908 0x7f46940a8800 WARN             h264decoder gsth264decoder.c:2361:modify_ref_pic_list:<vah264dec0> Malformed stream, no pic num 14
0:00:37.662912124 194908 0x7f46940a8800 WARN            videodecoder gstvideodecoder.c:4327:_gst_video_decoder_error:<vah264dec0> error: Failed to decode data
0:00:37.663004001 194908 0x7f46940a8800 WARN               vadecoder gstvadecoder.c:700:gst_va_decode_picture_free: VABufferID are leaked
0:00:37.663599838 194908 0x7f46940a8800 WARN             h264decoder gsth264picture.c:364:gst_h264_dpb_get_short_ref_by_pic_num: No short term reference picture for -1
0:00:37.663639847 194908 0x7f46940a8800 WARN             h264decoder gsth264decoder.c:2361:modify_ref_pic_list:<vah264dec0> Malformed stream, no pic num -1
0:00:37.663661159 194908 0x7f46940a8800 WARN            videodecoder gstvideodecoder.c:4327:_gst_video_decoder_error:<vah264dec0> error: Failed to decode data
0:00:37.663752836 194908 0x7f46940a8800 WARN               vadecoder gstvadecoder.c:700:gst_va_decode_picture_free: VABufferID are leaked
0:00:37.663841593 194908 0x7f46940a8800 WARN             h264decoder gsth264picture.c:364:gst_h264_dpb_get_short_ref_by_pic_num: No short term reference picture for 0
0:00:37.663858118 194908 0x7f46940a8800 WARN             h264decoder gsth264decoder.c:2361:modify_ref_pic_list:<vah264dec0> Malformed stream, no pic num 0
0:00:37.663875069 194908 0x7f46940a8800 WARN            videodecoder gstvideodecoder.c:4327:_gst_video_decoder_error:<vah264dec0> error: Failed to decode data
0:00:37.663924957 194908 0x7f46940a8800 WARN               vadecoder gstvadecoder.c:700:gst_va_decode_picture_free: VABufferID are leaked
0:00:37.664004231 194908 0x7f46940a8800 WARN             h264decoder gsth264picture.c:364:gst_h264_dpb_get_short_ref_by_pic_num: No short term reference picture for 1
0:00:37.664025259 194908 0x7f46940a8800 WARN             h264decoder gsth264decoder.c:2361:modify_ref_pic_list:<vah264dec0> Malformed stream, no pic num 1
0:00:37.664045933 194908 0x7f46940a8800 WARN            videodecoder gstvideodecoder.c:4327:_gst_video_decoder_error:<vah264dec0> error: Failed to decode data
0:00:37.664060501 194908 0x7f46940a8800 WARN               vadecoder gstvadecoder.c:700:gst_va_decode_picture_free: VABufferID are leaked
0:00:37.664110295 194908 0x7f46940a8800 WARN             h264decoder gsth264picture.c:364:gst_h264_dpb_get_short_ref_by_pic_num: No short term reference picture for 2
0:00:37.664118830 194908 0x7f46940a8800 WARN             h264decoder gsth264decoder.c:2361:modify_ref_pic_list:<vah264dec0> Malformed stream, no pic num 2
0:00:37.664127205 194908 0x7f46940a8800 WARN            videodecoder gstvideodecoder.c:4327:_gst_video_decoder_error:<vah264dec0> error: Failed to decode data
0:00:37.664141004 194908 0x7f46940a8800 WARN               vadecoder gstvadecoder.c:700:gst_va_decode_picture_free: VABufferID are leaked
0:00:37.664182360 194908 0x7f46940a8800 WARN             h264decoder gsth264picture.c:364:gst_h264_dpb_get_short_ref_by_pic_num: No short term reference picture for 3
0:00:37.664189766 194908 0x7f46940a8800 WARN             h264decoder gsth264decoder.c:2361:modify_ref_pic_list:<vah264dec0> Malformed stream, no pic num 3
0:00:37.664197599 194908 0x7f46940a8800 WARN            videodecoder gstvideodecoder.c:4327:_gst_video_decoder_error:<vah264dec0> error: Failed to decode data
0:00:37.664213882 194908 0x7f46940a8800 WARN               vadecoder gstvadecoder.c:700:gst_va_decode_picture_free: VABufferID are leaked
0:00:37.664260057 194908 0x7f46940a8800 WARN             h264decoder gsth264picture.c:364:gst_h264_dpb_get_short_ref_by_pic_num: No short term reference picture for 4
0:00:37.664285224 194908 0x7f46940a8800 WARN             h264decoder gsth264decoder.c:2361:modify_ref_pic_list:<vah264dec0> Malformed stream, no pic num 4
0:00:37.664293615 194908 0x7f46940a8800 WARN            videodecoder gstvideodecoder.c:4327:_gst_video_decoder_error:<vah264dec0> error: Failed to decode data
0:00:37.664307931 194908 0x7f46940a8800 WARN               vadecoder gstvadecoder.c:700:gst_va_decode_picture_free: VABufferID are leaked
0:00:37.665298393 194908 0x7f46940a8800 WARN             h264decoder gsth264picture.c:364:gst_h264_dpb_get_short_ref_by_pic_num: No short term reference picture for 5
0:00:37.665335097 194908 0x7f46940a8800 WARN             h264decoder gsth264decoder.c:2361:modify_ref_pic_list:<vah264dec0> Malformed stream, no pic num 5
0:00:37.665366032 194908 0x7f46940a8800 WARN            videodecoder gstvideodecoder.c:4327:_gst_video_decoder_error:<vah264dec0> error: Failed to decode data
0:00:37.665425179 194908 0x7f46940a8800 WARN               vadecoder gstvadecoder.c:700:gst_va_decode_picture_free: VABufferID are leaked
0:00:37.665504373 194908 0x7f46940a8800 WARN             h264decoder gsth264picture.c:364:gst_h264_dpb_get_short_ref_by_pic_num: No short term reference picture for 6
0:00:37.665523347 194908 0x7f46940a8800 WARN             h264decoder gsth264decoder.c:2361:modify_ref_pic_list:<vah264dec0> Malformed stream, no pic num 6
0:00:37.665541797 194908 0x7f46940a8800 WARN            videodecoder gstvideodecoder.c:4327:_gst_video_decoder_error:<vah264dec0> error: Failed to decode data
0:00:37.665596797 194908 0x7f46940a8800 WARN               vadecoder gstvadecoder.c:700:gst_va_decode_picture_free: VABufferID are leaked
0:00:37.665679410 194908 0x7f46940a84c0 WARN           matroskademux matroska-demux.c:5860:gst_matroska_demux_loop:<matroskademux0> error: Internal data stream error.
0:00:37.665697494 194908 0x7f46940a84c0 WARN           matroskademux matroska-demux.c:5860:gst_matroska_demux_loop:<matroskademux0> error: streaming stopped, reason error (-5)

• This happens on older gstreamer-vaapi decoder:

0:00:10.024339951 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 7
0:00:10.024395559 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 7
0:00:10.024419745 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 6
0:00:10.024432864 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 5
0:00:10.024446926 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 4
0:00:10.024459163 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 0 is empty
0:00:10.024471417 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 1 is empty
0:00:10.024485345 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 2 is empty
0:00:10.024495212 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 3 is empty
0:00:10.024505425 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 4 is empty
0:00:10.024524345 196001 0x7f3b7c000cc0 WARN             vaapidecode gstvaapidecode.c:780:gst_vaapidecode_handle_frame:<vaapidecode0> decode error -1
0:00:10.024543492 196001 0x7f3b7c000cc0 WARN            videodecoder gstvideodecoder.c:4327:_gst_video_decoder_error:<vaapidecode0> error: Decoding error
0:00:10.024556907 196001 0x7f3b7c000cc0 WARN            videodecoder gstvideodecoder.c:4329:_gst_video_decoder_error:<vaapidecode0> error: Decode error -1
0:00:10.025419817 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 8
0:00:10.025440777 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 8
0:00:10.025453644 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 7
0:00:10.025466314 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 6
0:00:10.025478716 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 5
0:00:10.025494261 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 0 is empty
0:00:10.025515998 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 1 is empty
0:00:10.025536144 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 2 is empty
0:00:10.025556782 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 3 is empty
0:00:10.025576406 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 4 is empty
0:00:10.025601997 196001 0x7f3b7c000cc0 WARN             vaapidecode gstvaapidecode.c:780:gst_vaapidecode_handle_frame:<vaapidecode0> decode error -1
0:00:10.025624267 196001 0x7f3b7c000cc0 WARN            videodecoder gstvideodecoder.c:4327:_gst_video_decoder_error:<vaapidecode0> error: Decoding error
0:00:10.025637282 196001 0x7f3b7c000cc0 WARN            videodecoder gstvideodecoder.c:4329:_gst_video_decoder_error:<vaapidecode0> error: Decode error -1
0:00:10.025749873 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 9
0:00:10.025766789 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 9
0:00:10.025779996 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 8
0:00:10.025794208 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 7
0:00:10.025808884 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 6
0:00:10.025821330 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 0 is empty
0:00:10.025830877 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 1 is empty
0:00:10.025843044 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 2 is empty
0:00:10.025856539 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 3 is empty
0:00:10.025869873 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 4 is empty
0:00:10.025883722 196001 0x7f3b7c000cc0 WARN             vaapidecode gstvaapidecode.c:780:gst_vaapidecode_handle_frame:<vaapidecode0> decode error -1
0:00:10.025899185 196001 0x7f3b7c000cc0 WARN            videodecoder gstvideodecoder.c:4327:_gst_video_decoder_error:<vaapidecode0> error: Decoding error
0:00:10.025909976 196001 0x7f3b7c000cc0 WARN            videodecoder gstvideodecoder.c:4329:_gst_video_decoder_error:<vaapidecode0> error: Decode error -1
0:00:10.026237266 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 10
0:00:10.026253914 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 10
0:00:10.026265486 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 9
0:00:10.026275142 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 8
0:00:10.026284806 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 7
0:00:10.026296834 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 0 is empty
0:00:10.026307038 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 1 is empty
0:00:10.026319711 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 2 is empty
0:00:10.026331971 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 3 is empty
0:00:10.026341549 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 4 is empty
0:00:10.026354087 196001 0x7f3b7c000cc0 WARN             vaapidecode gstvaapidecode.c:780:gst_vaapidecode_handle_frame:<vaapidecode0> decode error -1
0:00:10.026369909 196001 0x7f3b7c000cc0 WARN            videodecoder gstvideodecoder.c:4327:_gst_video_decoder_error:<vaapidecode0> error: Decoding error
0:00:10.026380696 196001 0x7f3b7c000cc0 WARN            videodecoder gstvideodecoder.c:4329:_gst_video_decoder_error:<vaapidecode0> error: Decode error -1
0:00:10.026475229 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 11
0:00:10.026488825 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 11
0:00:10.026497104 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 10
0:00:10.026508127 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 9
0:00:10.026516766 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 8
0:00:10.026529037 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 0 is empty
0:00:10.026542914 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 1 is empty
0:00:10.026552342 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 2 is empty
0:00:10.026563822 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 3 is empty
0:00:10.026576017 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 4 is empty
0:00:10.026585871 196001 0x7f3b7c000cc0 WARN             vaapidecode gstvaapidecode.c:780:gst_vaapidecode_handle_frame:<vaapidecode0> decode error -1
0:00:10.026600953 196001 0x7f3b7c000cc0 WARN            videodecoder gstvideodecoder.c:4327:_gst_video_decoder_error:<vaapidecode0> error: Decoding error
0:00:10.026609650 196001 0x7f3b7c000cc0 WARN            videodecoder gstvideodecoder.c:4329:_gst_video_decoder_error:<vaapidecode0> error: Decode error -1
0:00:10.026717931 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 12
0:00:10.026731628 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 12
0:00:10.026745925 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 11
0:00:10.026757180 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 10
0:00:10.026767668 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 9
0:00:10.026782039 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 0 is empty
0:00:10.026791313 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 1 is empty
0:00:10.026801983 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 2 is empty
0:00:10.026813495 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 3 is empty
0:00:10.026824545 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 4 is empty
0:00:10.026837174 196001 0x7f3b7c000cc0 WARN             vaapidecode gstvaapidecode.c:780:gst_vaapidecode_handle_frame:<vaapidecode0> decode error -1
0:00:10.026849916 196001 0x7f3b7c000cc0 WARN            videodecoder gstvideodecoder.c:4327:_gst_video_decoder_error:<vaapidecode0> error: Decoding error
0:00:10.026861008 196001 0x7f3b7c000cc0 WARN            videodecoder gstvideodecoder.c:4329:_gst_video_decoder_error:<vaapidecode0> error: Decode error -1
0:00:10.026957682 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 13
0:00:10.026971467 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 13
0:00:10.026982311 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 12
0:00:10.026993808 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 11
0:00:10.027002370 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 10
0:00:10.027012623 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 0 is empty
0:00:10.027024039 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 1 is empty
0:00:10.027036329 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 2 is empty
0:00:10.027048550 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 3 is empty
0:00:10.027061301 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 4 is empty
0:00:10.027074085 196001 0x7f3b7c000cc0 WARN             vaapidecode gstvaapidecode.c:780:gst_vaapidecode_handle_frame:<vaapidecode0> decode error -1
0:00:10.027094954 196001 0x7f3b7c000cc0 WARN            videodecoder gstvideodecoder.c:4327:_gst_video_decoder_error:<vaapidecode0> error: Decoding error
0:00:10.027104323 196001 0x7f3b7c000cc0 WARN            videodecoder gstvideodecoder.c:4329:_gst_video_decoder_error:<vaapidecode0> error: Decode error -1
0:00:10.027251540 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 14
0:00:10.027264757 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 14
0:00:10.027278060 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 13
0:00:10.027286149 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 12
0:00:10.027294780 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 11
0:00:10.027303967 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 0 is empty
0:00:10.027312726 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 1 is empty
0:00:10.027321209 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 2 is empty
0:00:10.027329396 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 3 is empty
0:00:10.027338274 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 4 is empty
0:00:10.027351768 196001 0x7f3b7c000cc0 WARN             vaapidecode gstvaapidecode.c:780:gst_vaapidecode_handle_frame:<vaapidecode0> decode error -1
0:00:10.027364978 196001 0x7f3b7c000cc0 WARN            videodecoder gstvideodecoder.c:4327:_gst_video_decoder_error:<vaapidecode0> error: Decoding error
0:00:10.027377249 196001 0x7f3b7c000cc0 WARN            videodecoder gstvideodecoder.c:4329:_gst_video_decoder_error:<vaapidecode0> error: Decode error -1
0:00:10.027459382 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = -1
0:00:10.027473543 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = -1
0:00:10.027481761 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = -2
0:00:10.027492762 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = -3
0:00:10.027504180 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = -4
0:00:10.027513194 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 0 is empty
0:00:10.027522127 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 1 is empty
0:00:10.027531974 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 2 is empty
0:00:10.027540447 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 3 is empty
0:00:10.027549620 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 4 is empty
0:00:10.027591214 196001 0x7f3b7c000cc0 WARN             vaapidecode gstvaapidecode.c:780:gst_vaapidecode_handle_frame:<vaapidecode0> decode error -1
0:00:10.027603887 196001 0x7f3b7c000cc0 WARN            videodecoder gstvideodecoder.c:4327:_gst_video_decoder_error:<vaapidecode0> error: Decoding error
0:00:10.027612864 196001 0x7f3b7c000cc0 WARN            videodecoder gstvideodecoder.c:4329:_gst_video_decoder_error:<vaapidecode0> error: Decode error -1
0:00:10.027695812 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 0
0:00:10.027707668 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 0
0:00:10.027715779 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = -1
0:00:10.027723843 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = -2
0:00:10.027733213 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = -3
0:00:10.027741909 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 0 is empty
0:00:10.027753003 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 1 is empty
0:00:10.027761528 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 2 is empty
0:00:10.027770401 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 3 is empty
0:00:10.027779227 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 4 is empty
0:00:10.027791138 196001 0x7f3b7c000cc0 WARN             vaapidecode gstvaapidecode.c:780:gst_vaapidecode_handle_frame:<vaapidecode0> decode error -1
0:00:10.027803059 196001 0x7f3b7c000cc0 WARN            videodecoder gstvideodecoder.c:4327:_gst_video_decoder_error:<vaapidecode0> error: Decoding error
0:00:10.027812942 196001 0x7f3b7c000cc0 WARN            videodecoder gstvideodecoder.c:4329:_gst_video_decoder_error:<vaapidecode0> error: Decode error -1
0:00:10.027898653 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 1
0:00:10.027910363 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 1
0:00:10.027920190 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = 0
0:00:10.027928509 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = -1
0:00:10.027938668 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2757:find_short_term_reference: found no short-term reference picture with PicNum = -2
0:00:10.027948851 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 0 is empty
0:00:10.027959310 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 1 is empty
0:00:10.027970200 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 2 is empty
0:00:10.027978612 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 3 is empty
0:00:10.027986884 196001 0x7f3b7c000cc0 ERROR                  vaapi gstvaapidecoder_h264.c:2963:exec_picture_refs_modification_1: list 0 entry 4 is empty
0:00:10.027997316 196001 0x7f3b7c000cc0 WARN             vaapidecode gstvaapidecode.c:780:gst_vaapidecode_handle_frame:<vaapidecode0> decode error -1
0:00:10.028009135 196001 0x7f3b7c000cc0 WARN            videodecoder gstvideodecoder.c:4327:_gst_video_decoder_error:<vaapidecode0> error: Decoding error
0:00:10.028017222 196001 0x7f3b7c000cc0 WARN            videodecoder gstvideodecoder.c:4329:_gst_video_decoder_error:<vaapidecode0> error: Decode error -1
0:00:10.028541712 196001 0x7f3b78000e40 WARN           matroskademux matroska-demux.c:5860:gst_matroska_demux_loop:<matroskademux0> error: Internal data stream error.
0:00:10.028567276 196001 0x7f3b78000e40 WARN           matroskademux matroska-demux.c:5860:gst_matroska_demux_loop:<matroskademux0> error: streaming stopped, reason error (-5)

• And this is with avdec_h264:

0:00:09.142425994 196423 0x7f151029b800 ERROR                  libav :0:: reference picture missing during reorder
0:00:09.142473613 196423 0x7f151029b800 ERROR                  libav :0:: reference picture missing during reorder
0:00:09.142494060 196423 0x7f151029b800 ERROR                  libav :0:: Missing reference picture, default is 2
0:00:09.142505121 196423 0x7f151029b800 ERROR                  libav :0:: Missing reference picture, default is 2