cavlc+bframe decode error

[chezhan3]

@xiaotiansf Hi, I used JM to encode B frame bitstream with the Entropy coding = cavlc，and used openh264 to decode, it can only decoded 2 frames(set to 9); But JM could decode correctly. Attach the bitstream file for you.

================================================================ ./h264dec /home/jenkins/openh264/res/Cisco_Adobe_PDF_sample_a_1024x768_CAVLC_Bframe_9.26 4 Adobe.yuv H264 source file name: /home/jenkins/openh264/res/Cisco_Adobe_PDF_sample_a_1024x768_CAVLC_Bframe_9.264.. Sequence output file name: Adobe.yuv.. [OpenH264] this = 0x0x10ebc80, Warning:DecodeCurrentAccessUnit() failed (459806) in frame: 1 uiDId: 0 uiQId: 0 [OpenH264] this = 0x0x10ebc80, Warning:DecodeCurrentAccessUnit() failed (459806) in frame: 1 uiDId: 0 uiQId: 0 [OpenH264] this = 0x0x10ebc80, Warning:DecodeCurrentAccessUnit() failed (459806) in frame: 1 uiDId: 0 uiQId: 0 [OpenH264] this = 0x0x10ebc80, Warning:DecodeCurrentAccessUnit() failed (459806) in frame: 1 uiDId: 0 uiQId: 0 [OpenH264] this = 0x0x10ebc80, Warning:DecodeCurrentAccessUnit() failed (459806) in frame: 1 uiDId: 0 uiQId: 0 [OpenH264] this = 0x0x10ebc80, Warning:DecodeCurrentAccessUnit() failed (459806) in frame: 1 uiDId: 0 uiQId: 0 [OpenH264] this = 0x0x10ebc80, Warning:DecodeCurrentAccessUnit() failed (459806) in frame: 1 uiDId: 0 uiQId: 0

iWidth: 1024 height: 768 Frames: 2 decode time: 0.026108 sec FPS: 76.604872 fps

JM decoded it successfully.

./lencod.exe -d encoder_main.cfg Setting Default Parameters... Parsing Configfile encoder_main.cfg...............................................................................................................................................................................................................................................................................................

------------------------------- JM 19.0 (FRExt) ------------------------------- Input YUV file : /home/jenkins/JM/bin/Cisco_Adobe_PDF_sample_a_1024x768_CAVLC_Bframe_9.yuv Output H.264 bitstream : Cisco_Adobe_PDF_sample_a_1024x768_CAVLC_Bframe_9.264 Output YUV file : Cisco_Adobe_PDF_sample_a_1024x768_CAVLC_Bframe_9_rec.yuv YUV Format : YUV 4:2:0 Frames to be encoded : 9 Freq. for encoded bitstream : 30.00 PicInterlace / MbInterlace : 0/0 Transform8x8Mode : 0 ME Metric for Refinement Level 0 : SAD ME Metric for Refinement Level 1 : Hadamard SAD ME Metric for Refinement Level 2 : Hadamard SAD Mode Decision Metric : Hadamard SAD Motion Estimation for components : Y Image format : 1024x768 (1024x768) Error robustness : Off Search range : 32 Total number of references : 5 References for P slices : 5 References for B slices (L0, L1) : 5, 1 Sequence type : I-B-B-B-B-B-B-B-P-B-B-B-B-B-B-B-P (QP: I 28, P 28, B 30) Entropy coding method : CAVLC Profile/Level IDC : (77,52) Motion Estimation Scheme : Fast Full Search Search range restrictions : none RD-optimized mode decision : used Data Partitioning Mode : 1 partition Output File Format : H.264/AVC Annex B Byte Stream Format

Frame Bit/pic QP SnrY SnrU SnrV Time(ms) MET(ms) Frm/Fld Ref

00000(NVB) 184 00000(IDR) 1084808 28 48.852 51.475 51.149 525 0 FRM 3 00008(IDR) 1086088 28 49.113 50.694 49.949 484 0 FRM 3 00001( B ) 504 30 48.944 50.694 49.949 15066 14385 FRM 0 00002( B ) 448 30 48.943 50.694 49.949 15425 14734 FRM 0 00003( B ) 624 30 49.059 50.694 49.949 15399 14697 FRM 0 00004( B ) 624 30 49.057 50.694 49.949 15299 14608 FRM 0 00005( B ) 904 30 49.051 50.694 49.949 15367 14663 FRM 0 00006( B ) 568 30 49.059 50.694 49.949 14991 14317 FRM 0 00007( B ) 904 30 49.053 50.694 49.949 15154 14469 FRM 0

Total Frames: 9 Leaky BucketRateFile does not have valid entries. Using rate calculated from avg. rate Number Leaky Buckets: 8 Rmin Bmin Fmin 7251570 1929177 1929177 9064440 1868748 1868748 10877310 1808319 1808319 12690180 1747890 1747890 14503050 1687461 1687461 16315920 1627032 1627032 18128790 1566603 1566603 19941660 1506174 1506174

================================================================== Cisco_Adobe_PDF_sample_a_1024x768_CAVLC_Bframe_9.zip

[chezhan3]

Cisco_Adobe_PDF_sample_a_1024x768_5_CABAC_Bframes_9.zip

[xiaotiansf]

@chezhan3 Right, I did not implement cavlc b-frame and thought it is not being used so often. Fortunately most implementations of cabac b-frame decoding are the same as those of cavlc b-frame decoding. It is much simpler than cabac b-frame. one developer @centricular.com had interest in continuing the effort and I told him that the cavlc-frame decoding is currently missing.

[chezhan3]

Hi, I got it, thank you☺ Regards, Chen Zhang -X (chezhan3 - CIIC at Cisco)

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Cisco Systems, Inc.

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From: Xiaotian Shi notifications@github.com Sent: 2018年8月21日 23:58 To: cisco/openh264 openh264@noreply.github.com Cc: Chen Zhang -X (chezhan3 - CIIC at Cisco) chezhan3@cisco.com; Mention mention@noreply.github.com Subject: Re: [cisco/openh264] cavlc+bframe decode error (#3013)

@chezhan3https://github.com/chezhan3 Right, I did not implement cavlc b-frame and thought it is not being used so often. Fortunately most implementations of cabac b-frame decoding are the same as those of cavlc b-frame decoding. It is much simpler than cabac b-frame. one developer @centricular.com had interest in continuing the effort and I told him that the cavlc-frame decoding is currently missing.

— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHubhttps://github.com/cisco/openh264/issues/3013#issuecomment-414725919, or mute the threadhttps://github.com/notifications/unsubscribe-auth/Ak-j7vc3vKq1LucWbR0XVkP6CNSSoPwiks5uTC37gaJpZM4WFWhT.

[thaytan]

Latest git master decodes all 9 frames in Cisco_Adobe_PDF_sample_a_1024x768_CAVLC_Bframe_9.zip