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@leaveye 2026-03-25T12:51:40.000000Z 字数 10969 阅读 50

20260325 客户现场信息备份

客户 旅顺 CT800 CP800 现场

基于 18.pcap 分析，CT800 不能解码视频流的原因

结论

当前 SDK（SS528V100V2.0.0.1 B020 Release）中：VDEC 模块无法解码场编码的 H264 数据流。

另：
- 调整后，VDEC 是否可以解码场编码的 H264 流还需确认。
- 对应的 H264E 模块，是否可以编码场编码的 H264 流还需确认。

定位过程

用 tcp-replay 将抓到的包发送到开发环境的 CT800 进行解码

SDK:VDEC 信息中，错误计数（pack_err、format_err）一直在上升，数量 get_pic = discard

  1. Every 2.0s: cat /proc/umap/vdec                                                                         2026-03-25 20:25:13
  4. [VDEC] Version: [SS528V100V2.0.0.1 B020 Release], Build Time[May  3 2022, 10:26:13]
  7. ----------------------------------------module param--------------------------------------------------------------------
  8.   g_vdec_max_chn_num     mini_buf_mode     vb_src     g_vdec_compat_mode
  9.                  128                 0        MOD                      0
  10.   max_video_width    max_video_height     max_slice_num       vdh_msg_num     schedule_mode
  11.              8192                8192               600                 8            NORMAL
  12.   max_pic_width    max_pic_height    progressive_en    dynamic_alloc_en   capacity_strategy
  13.           16384             16384                 0                   0                   0
  15. ----------------------------------------chn comm attr & params----------------------------------------------------------
  16.   id  type  max_w  max_h   width  height       send_mode   str_buf_size  frame_buf_size  frame_buf_cnt   tmv_buf_size
  17.    0  H264   3840   2160     352     576   FRAME/NOBLOCK        8294400             N/A            N/A            N/A
  18.   id  state  display_num  display_mode  rotation  set_user_pic   enable_user_pic   pic_pool_id  tmv_pool_id
  19.    0  START            2       PREVIEW         0             N                 N           N/A          N/A
  21. ----------------------------------------chn video attr & params---------------------------------------------------------
  22.   id  vfmw_id   ref_num    tmv_en     err_threshold   dec_mode  out_order  compress_mode   video_format
  23.    0        0         5         N                30         IP        DEC              N           TILE
  24.   id  max_vps_num    max_sps_num    max_pps_num   max_slice_segment_num
  25.    0            0              2              2                      16
  26.   id  composite_dec_en   quick_mark_mode   deployment_mode
  27.    0                 N             ADAPT               N/A
  29. ----------------------------------------chn pic attr & params-----------------------------------------------------------
  30.   id  pixel_format   alpha
  31.    0           N/A     N/A
  33. ----------------------------------------chn state-----------------------------------------------------------------------
  34.   id  protocol_err  str_unsupport  pack_err  ref_num_err  pic_size_err  format_err  pic_buf_size_err  str_size_over
  35.    0             0              0        13            0             0       78138                 0              0
  36.   id  pts_buf_free   pts_buf_busy        buf_len       data_len     rd_rgn_len   scd_left_len     wr_rgn_len
  37.    0           198              1       12443407            209              0              0              0
  38.   id  fps   stream_end   frame_end   timer_cnt   notify   unique_id    state    send_vgs    vgs_back
  39.    0   25            0      156219      252050   234370          12  CREATED           0           0
  41. ----------------------------------------detail stream state-------------------------------------------------------------
  42.   id  mpi_send_cnt  mpi_send_len  end_code_cnt  end_code_len   vfmw_get_cnt   vfmw_get_len   vfmw_rls_cnt   vfmw_rls_len
  43.    0        156219     166025945        156219       2343285         312460      168369021         312460      168369021
  44.   id  vfmw_latest_get_len   vfmw_rls_fail_cnt         mpi_send_gap
  45.    0                   30                   0                 8170
  47. ----------------------------------------detail frame store state--------------------------------------------------------
  48.   id  new_pic  get_pic  discard   no_display  mpi_get  kernel_send  kernel_rls  meet_end  frame_in_vdec
  49.    0    78138    78138    78138            0        0            0           0    156218              1
  50.   id  free_node  vfmw_node  vgs_node  vgs_working_node  busy_node  user_node  ref_num  vb_cnt  max_vb_cnt  rotate_vb_cnt
  51.    0         39          1         0                 0          0          0        2       2           8              0
  52.   id  available  pic_vb_fail    tmv_vb_fail    rotate_vb_fail    pic_size    tmv_size   rotate_size    cur_pic_pts
  53.    0          0            0              0                 0      338688       50688             0              0
  54.   id  dynamic_range  color_gamut
  55.    0           SDR8        BT601
  57. ----------------------------------------detail user_data state----------------------------------------------------------
  58.   id  enable   max_user_data_len   free_buf_len   data_buf_len
  59.    0       1                1024           4096              0
  60.   id  mpi_get_cnt   mpi_get_len   mpi_rls_cnt   mpi_rls_len   discard_cnt   discard_len   vdec_get_cnt   vdec_get_len
  61.    0            0             0             0             0             0             0              0              0
  62. ^C

SDK:logmpp 日志中，一直持续性报错

  1. <3>[  vdec] [Func]:vdec_check_firm_ware_image [Line]:1181 [Info]:this is a field stream and vdec do not support! chn 0
  2. <3>[  vdec] [Func]:vdec_check_firm_ware_image [Line]:1181 [Info]:this is a field stream and vdec do not support! chn 0
  3. <3>[  vdec] [Func]:vdec_check_firm_ware_image [Line]:1181 [Info]:this is a field stream and vdec do not support! chn 0
  4. <3>[  vdec] [Func]:vdec_check_firm_ware_image [Line]:1181 [Info]:this is a field stream and vdec do not support! chn 0

导出数据流 18.h264

分析数据看出是场编码

  1. Input #0, h264, from '18.h264':
  2.   Duration: N/A, bitrate: N/A
  3.   Stream #0:0: Video: h264 (Main), yuv420p(top first), 352x576, 25 fps, 1200k tbr, 1200k tbn
  4. [trace_headers @ 0x55a913e38600] Extradata
  5. [trace_headers @ 0x55a913e38600] Sequence Parameter Set
  6. [trace_headers @ 0x55a913e38600] 0           forbidden_zero_bit                                          0 = 0
  7. [trace_headers @ 0x55a913e38600] 1           nal_ref_idc                                                11 = 3
  8. [trace_headers @ 0x55a913e38600] 3           nal_unit_type                                           00111 = 7
  9. [trace_headers @ 0x55a913e38600] 8           profile_idc                                          01001101 = 77
  10. [trace_headers @ 0x55a913e38600] 16          constraint_set0_flag                                        0 = 0
  11. [trace_headers @ 0x55a913e38600] 17          constraint_set1_flag                                        1 = 1
  12. [trace_headers @ 0x55a913e38600] 18          constraint_set2_flag                                        0 = 0
  13. [trace_headers @ 0x55a913e38600] 19          constraint_set3_flag                                        0 = 0
  14. [trace_headers @ 0x55a913e38600] 20          constraint_set4_flag                                        0 = 0
  15. [trace_headers @ 0x55a913e38600] 21          constraint_set5_flag                                        0 = 0
  16. [trace_headers @ 0x55a913e38600] 22          reserved_zero_2bits                                        00 = 0
  17. [trace_headers @ 0x55a913e38600] 24          level_idc                                            00011110 = 30
  18. [trace_headers @ 0x55a913e38600] 32          seq_parameter_set_id                                        1 = 0
  19. [trace_headers @ 0x55a913e38600] 33          log2_max_frame_num_minus4                               00101 = 4
  20. [trace_headers @ 0x55a913e38600] 38          pic_order_cnt_type                                          1 = 0
  21. [trace_headers @ 0x55a913e38600] 39          log2_max_pic_order_cnt_lsb_minus4                       00110 = 5
  22. [trace_headers @ 0x55a913e38600] 44          max_num_ref_frames                                        011 = 2
  23. [trace_headers @ 0x55a913e38600] 47          gaps_in_frame_num_allowed_flag                              0 = 0
  24. [trace_headers @ 0x55a913e38600] 48          pic_width_in_mbs_minus1                             000010110 = 21
  25. [trace_headers @ 0x55a913e38600] 57          pic_height_in_map_units_minus1                      000010010 = 17
  26. [trace_headers @ 0x55a913e38600] 66          frame_mbs_only_flag                                         0 = 0    <--- 场编码
  27. [trace_headers @ 0x55a913e38600] 67          mb_adaptive_frame_field_flag                                0 = 0
  28. [trace_headers @ 0x55a913e38600] 68          direct_8x8_inference_flag                                   1 = 1
  29. [trace_headers @ 0x55a913e38600] 69          frame_cropping_flag                                         0 = 0
  30. [trace_headers @ 0x55a913e38600] 70          vui_parameters_present_flag                                 0 = 0
  31. [trace_headers @ 0x55a913e38600] 71          rbsp_stop_one_bit                                           1 = 1
  32. [trace_headers @ 0x55a913e38600] Picture Parameter Set
  33. [trace_headers @ 0x55a913e38600] 0           forbidden_zero_bit                                          0 = 0
  34. [trace_headers @ 0x55a913e38600] 1           nal_ref_idc                                                11 = 3
  35. [trace_headers @ 0x55a913e38600] 3           nal_unit_type                                           01000 = 8
  36. [trace_headers @ 0x55a913e38600] 8           pic_parameter_set_id                                        1 = 0
  37. [trace_headers @ 0x55a913e38600] 9           seq_parameter_set_id                                        1 = 0
  38. [trace_headers @ 0x55a913e38600] 10          entropy_coding_mode_flag                                    0 = 0
  39. [trace_headers @ 0x55a913e38600] 11          bottom_field_pic_order_in_frame_present_flag                1 = 1
  40. [trace_headers @ 0x55a913e38600] 12          num_slice_groups_minus1                                     1 = 0
  41. [trace_headers @ 0x55a913e38600] 13          num_ref_idx_l0_default_active_minus1                      010 = 1
  42. [trace_headers @ 0x55a913e38600] 16          num_ref_idx_l1_default_active_minus1                      010 = 1
  43. [trace_headers @ 0x55a913e38600] 19          weighted_pred_flag                                          0 = 0
  44. [trace_headers @ 0x55a913e38600] 20          weighted_bipred_idc                                        00 = 0
  45. [trace_headers @ 0x55a913e38600] 22          pic_init_qp_minus26                                         1 = 0
  46. [trace_headers @ 0x55a913e38600] 23          pic_init_qs_minus26                                         1 = 0
  47. [trace_headers @ 0x55a913e38600] 24          chroma_qp_index_offset                                      1 = 0
  48. [trace_headers @ 0x55a913e38600] 25          deblocking_filter_control_present_flag                      1 = 1
  49. [trace_headers @ 0x55a913e38600] 26          constrained_intra_pred_flag                                 0 = 0
  50. [trace_headers @ 0x55a913e38600] 27          redundant_pic_cnt_present_flag                              0 = 0
  51. [trace_headers @ 0x55a913e38600] 28          rbsp_stop_one_bit                                           1 = 1
  52. [trace_headers @ 0x55a913e38600] 29          rbsp_alignment_zero_bit                                     0 = 0
  53. [trace_headers @ 0x55a913e38600] 30          rbsp_alignment_zero_bit                                     0 = 0
  54. [trace_headers @ 0x55a913e38600] 31          rbsp_alignment_zero_bit                                     0 = 0

与之相对的，CT800编码352x544分辨率得到的是帧编码：

  1. Input #0, h264, from 'my-352x544.h264':
  2.   Duration: N/A, bitrate: N/A
  3.   Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt470bg/bt470bg/bt709, progressive), 352x544, 25 fps, 1200k tbr, 1200k tbn
  4. [trace_headers @ 0x55ba1cac75c0] Extradata
  5. [trace_headers @ 0x55ba1cac75c0] Sequence Parameter Set
  6. [trace_headers @ 0x55ba1cac75c0] 0           forbidden_zero_bit                                          0 = 0
  7. [trace_headers @ 0x55ba1cac75c0] 1           nal_ref_idc                                                11 = 3
  8. [trace_headers @ 0x55ba1cac75c0] 3           nal_unit_type                                           00111 = 7
  9. [trace_headers @ 0x55ba1cac75c0] 8           profile_idc                                          01001101 = 77
  10. [trace_headers @ 0x55ba1cac75c0] 16          constraint_set0_flag                                        0 = 0
  11. [trace_headers @ 0x55ba1cac75c0] 17          constraint_set1_flag                                        0 = 0
  12. [trace_headers @ 0x55ba1cac75c0] 18          constraint_set2_flag                                        0 = 0
  13. [trace_headers @ 0x55ba1cac75c0] 19          constraint_set3_flag                                        0 = 0
  14. [trace_headers @ 0x55ba1cac75c0] 20          constraint_set4_flag                                        0 = 0
  15. [trace_headers @ 0x55ba1cac75c0] 21          constraint_set5_flag                                        0 = 0
  16. [trace_headers @ 0x55ba1cac75c0] 22          reserved_zero_2bits                                        00 = 0
  17. [trace_headers @ 0x55ba1cac75c0] 24          level_idc                                            00010101 = 21
  18. [trace_headers @ 0x55ba1cac75c0] 32          seq_parameter_set_id                                        1 = 0
  19. [trace_headers @ 0x55ba1cac75c0] 33          log2_max_frame_num_minus4                               00101 = 4
  20. [trace_headers @ 0x55ba1cac75c0] 38          pic_order_cnt_type                                          1 = 0
  21. [trace_headers @ 0x55ba1cac75c0] 39          log2_max_pic_order_cnt_lsb_minus4                     0001101 = 12
  22. [trace_headers @ 0x55ba1cac75c0] 46          max_num_ref_frames                                        010 = 1
  23. [trace_headers @ 0x55ba1cac75c0] 49          gaps_in_frame_num_allowed_flag                              1 = 1
  24. [trace_headers @ 0x55ba1cac75c0] 50          pic_width_in_mbs_minus1                             000010110 = 21
  25. [trace_headers @ 0x55ba1cac75c0] 59          pic_height_in_map_units_minus1                    00000100010 = 33
  26. [trace_headers @ 0x55ba1cac75c0] 70          frame_mbs_only_flag                                         1 = 1    <--- 帧编码
  27. [trace_headers @ 0x55ba1cac75c0] 71          direct_8x8_inference_flag                                   1 = 1
  28. [trace_headers @ 0x55ba1cac75c0] 72          frame_cropping_flag                                         0 = 0
  29. [trace_headers @ 0x55ba1cac75c0] 73          vui_parameters_present_flag                                 1 = 1
  30. [trace_headers @ 0x55ba1cac75c0] 74          aspect_ratio_info_present_flag                              0 = 0
  31. [trace_headers @ 0x55ba1cac75c0] 75          overscan_info_present_flag                                  0 = 0
  32. [trace_headers @ 0x55ba1cac75c0] 76          video_signal_type_present_flag                              1 = 1
  33. [trace_headers @ 0x55ba1cac75c0] 77          video_format                                              101 = 5
  34. [trace_headers @ 0x55ba1cac75c0] 80          video_full_range_flag                                       1 = 1
  35. [trace_headers @ 0x55ba1cac75c0] 81          colour_description_present_flag                             1 = 1
  36. [trace_headers @ 0x55ba1cac75c0] 82          colour_primaries                                     00000101 = 5
  37. [trace_headers @ 0x55ba1cac75c0] 90          transfer_characteristics                             00000001 = 1
  38. [trace_headers @ 0x55ba1cac75c0] 98          matrix_coefficients                                  00000101 = 5
  39. [trace_headers @ 0x55ba1cac75c0] 106         chroma_loc_info_present_flag                                0 = 0
  40. [trace_headers @ 0x55ba1cac75c0] 107         timing_info_present_flag                                    0 = 0
  41. [trace_headers @ 0x55ba1cac75c0] 108         nal_hrd_parameters_present_flag                             0 = 0
  42. [trace_headers @ 0x55ba1cac75c0] 109         vcl_hrd_parameters_present_flag                             0 = 0
  43. [trace_headers @ 0x55ba1cac75c0] 110         pic_struct_present_flag                                     0 = 0
  44. [trace_headers @ 0x55ba1cac75c0] 111         bitstream_restriction_flag                                  0 = 0
  45. [trace_headers @ 0x55ba1cac75c0] 112         rbsp_stop_one_bit                                           1 = 1
  46. [trace_headers @ 0x55ba1cac75c0] 113         rbsp_alignment_zero_bit                                     0 = 0
  47. [trace_headers @ 0x55ba1cac75c0] 114         rbsp_alignment_zero_bit                                     0 = 0
  48. [trace_headers @ 0x55ba1cac75c0] 115         rbsp_alignment_zero_bit                                     0 = 0
  49. [trace_headers @ 0x55ba1cac75c0] 116         rbsp_alignment_zero_bit                                     0 = 0
  50. [trace_headers @ 0x55ba1cac75c0] 117         rbsp_alignment_zero_bit                                     0 = 0
  51. [trace_headers @ 0x55ba1cac75c0] 118         rbsp_alignment_zero_bit                                     0 = 0
  52. [trace_headers @ 0x55ba1cac75c0] 119         rbsp_alignment_zero_bit                                     0 = 0
  53. [trace_headers @ 0x55ba1cac75c0] Picture Parameter Set
  54. [trace_headers @ 0x55ba1cac75c0] 0           forbidden_zero_bit                                          0 = 0
  55. [trace_headers @ 0x55ba1cac75c0] 1           nal_ref_idc                                                11 = 3
  56. [trace_headers @ 0x55ba1cac75c0] 3           nal_unit_type                                           01000 = 8
  57. [trace_headers @ 0x55ba1cac75c0] 8           pic_parameter_set_id                                        1 = 0
  58. [trace_headers @ 0x55ba1cac75c0] 9           seq_parameter_set_id                                        1 = 0
  59. [trace_headers @ 0x55ba1cac75c0] 10          entropy_coding_mode_flag                                    1 = 1
  60. [trace_headers @ 0x55ba1cac75c0] 11          bottom_field_pic_order_in_frame_present_flag                0 = 0
  61. [trace_headers @ 0x55ba1cac75c0] 12          num_slice_groups_minus1                                     1 = 0
  62. [trace_headers @ 0x55ba1cac75c0] 13          num_ref_idx_l0_default_active_minus1                        1 = 0
  63. [trace_headers @ 0x55ba1cac75c0] 14          num_ref_idx_l1_default_active_minus1                        1 = 0
  64. [trace_headers @ 0x55ba1cac75c0] 15          weighted_pred_flag                                          0 = 0
  65. [trace_headers @ 0x55ba1cac75c0] 16          weighted_bipred_idc                                        00 = 0
  66. [trace_headers @ 0x55ba1cac75c0] 18          pic_init_qp_minus26                                         1 = 0
  67. [trace_headers @ 0x55ba1cac75c0] 19          pic_init_qs_minus26                                         1 = 0
  68. [trace_headers @ 0x55ba1cac75c0] 20          chroma_qp_index_offset                                0001101 = -6
  69. [trace_headers @ 0x55ba1cac75c0] 27          deblocking_filter_control_present_flag                      1 = 1
  70. [trace_headers @ 0x55ba1cac75c0] 28          constrained_intra_pred_flag                                 0 = 0
  71. [trace_headers @ 0x55ba1cac75c0] 29          redundant_pic_cnt_present_flag                              0 = 0
  72. [trace_headers @ 0x55ba1cac75c0] 30          rbsp_stop_one_bit                                           1 = 1
  73. [trace_headers @ 0x55ba1cac75c0] 31          rbsp_alignment_zero_bit                                     0 = 0

与报错信息对应。确认结论。

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