The script ParseHevcHighLevelSyntax.py is dedicated to parse hevc high-level syntax (SPS, PPS and slice headers), syntax elements are printed out as plain text.
The script is adapted to work in real time with input fifo and with frame duration latency (therefore the last frame is not processed).
Two versions of the script supplied:
a) adapted for Python 2x
b) adapted for Python 3x
Constraints:
1) VPS and SEI messages are not parsed
2) the frame length of last frame of is not determined
3) HRD info is not parsed
Usage:
-i input hevc file (elementary stream)
-n number frames to process, if 0 then the whole stream (default 0)
-n number frames to process, if 0 then the whole stream (default 0)
In addition there is non-commercial free HEVC Analyzer
Example [ parse the first two frames]
python ParseHevcHighLevelSyntax.py -i test.h265 -n 2
Frame 0
SPS
sps_video_parameter_set_id 0
sps_max_sub_layers 1
sps_temporal_id_nesting_flag 1
general_profile_space 0
general_tier_flag 0
general_profile_idc 1
general_progressive_source_flag 1
general_interlaced_source_flag 0
general_non_packed_constraint_flag 0
general_frame_only_constraint_flag 1
general_level_idc 63
sps_seq_parameter_set_id 0
chroma_format_idc 1
pic_width_in_luma_samples 384
pic_height_in_luma_samples 320
conformance_window_flag 0
bit_depth_luma 8
bit_depth_chroma 8
log2_max_pic_order_cnt_lsb 8
sps_sub_layer_ordering_info 1
sps_max_dec_pic_buffering 4
sps_num_reorder_pics 0
sps_max_latency_increase_plus1 1
log2_min_coding_block_size 3
log2_diff_max_min_coding_block_size 3
log2_min_transform_block_size 2
log2_diff_max_min_transform_block_size 3
max_transform_hierarchy_depth_inter 0
max_transform_hierarchy_depth_intra 0
scaling_list_enabled_flag 0
amp_enabled_flag 0
sample_adaptive_offset_enabled_flag 1
pcm_enabled_flag 0
num_short_term_ref_pic_sets 0
long_term_ref_pics_present_flag 0
sps_temporal_mvp_enable_flag 1
sps_strong_intra_smoothing_enable_flag 1
vui_parameters_present_flag 1
VUI
aspect_ratio_info_present_flag 0
overscan_info_present_flag 0
video_signal_type_present_flag 1
video_format 5
video_full_range_flag 0
colour_description_present_flag 0
chroma_loc_info_present_flag 0
neutral_chroma_indication_flag 0
field_seq_flag 0
frame_field_info_present_flag 0
default_display_window_flag 0
vui_timing_info_present_flag 1
vui_num_units_in_tick 1
vui_time_scale 60
vui_poc_proportional_to_timing_flag 0
hrd_parameters_present_flag 0
bitstream_restriction_flag 0
sps_video_parameter_set_id 0
sps_max_sub_layers 1
sps_temporal_id_nesting_flag 1
general_profile_space 0
general_tier_flag 0
general_profile_idc 1
general_progressive_source_flag 1
general_interlaced_source_flag 0
general_non_packed_constraint_flag 0
general_frame_only_constraint_flag 1
general_level_idc 63
sps_seq_parameter_set_id 0
chroma_format_idc 1
pic_width_in_luma_samples 384
pic_height_in_luma_samples 320
conformance_window_flag 0
bit_depth_luma 8
bit_depth_chroma 8
log2_max_pic_order_cnt_lsb 8
sps_sub_layer_ordering_info 1
sps_max_dec_pic_buffering 4
sps_num_reorder_pics 0
sps_max_latency_increase_plus1 1
log2_min_coding_block_size 3
log2_diff_max_min_coding_block_size 3
log2_min_transform_block_size 2
log2_diff_max_min_transform_block_size 3
max_transform_hierarchy_depth_inter 0
max_transform_hierarchy_depth_intra 0
scaling_list_enabled_flag 0
amp_enabled_flag 0
sample_adaptive_offset_enabled_flag 1
pcm_enabled_flag 0
num_short_term_ref_pic_sets 0
long_term_ref_pics_present_flag 0
sps_temporal_mvp_enable_flag 1
sps_strong_intra_smoothing_enable_flag 1
vui_parameters_present_flag 1
VUI
aspect_ratio_info_present_flag 0
overscan_info_present_flag 0
video_signal_type_present_flag 1
video_format 5
video_full_range_flag 0
colour_description_present_flag 0
chroma_loc_info_present_flag 0
neutral_chroma_indication_flag 0
field_seq_flag 0
frame_field_info_present_flag 0
default_display_window_flag 0
vui_timing_info_present_flag 1
vui_num_units_in_tick 1
vui_time_scale 60
vui_poc_proportional_to_timing_flag 0
hrd_parameters_present_flag 0
bitstream_restriction_flag 0
Derived
ctu size 64×64
number CTUs in frame 30
len_slice_segment_address 5
ctu size 64×64
number CTUs in frame 30
len_slice_segment_address 5
PPS
pps_pic_parameter_set_id 0
pps_seq_parameter_set_id 0
dependent_slice_segments_enabled_flag 0
output_flag_present_flag 0
num_extra_slice_header_bits 0
sign_data_hiding_flag 1
cabac_init_present_flag 0
num_ref_idx_l0_default_active 1
num_ref_idx_l1_default_active 1
init_qp 26
constrained_intra_pred_flag 0
transform_skip_enabled_flag 0
cu_qp_delta_enabled_flag 1
diff_cu_qp_delta_depth 1
pps_cb_qp_offset 0
pps_cr_qp_offset 0
pps_slice_chroma_qp_offsets_present_flag 0
weighted_pred_flag 1
weighted_bipred_flag 0
transquant_bypass_enable_flag 0
tiles_enabled_flag 0
entropy_coding_sync_enabled_flag 0
loop_filter_across_slices_enabled_flag 1
deblocking_filter_control_present_flag 0
pps_scaling_list_data_present_flag 0
lists_modification_present_flag 0
log2_parallel_merge_level 2
slice_segment_header_extension_present_flag 0
pps_extension_flag 0
pps_seq_parameter_set_id 0
dependent_slice_segments_enabled_flag 0
output_flag_present_flag 0
num_extra_slice_header_bits 0
sign_data_hiding_flag 1
cabac_init_present_flag 0
num_ref_idx_l0_default_active 1
num_ref_idx_l1_default_active 1
init_qp 26
constrained_intra_pred_flag 0
transform_skip_enabled_flag 0
cu_qp_delta_enabled_flag 1
diff_cu_qp_delta_depth 1
pps_cb_qp_offset 0
pps_cr_qp_offset 0
pps_slice_chroma_qp_offsets_present_flag 0
weighted_pred_flag 1
weighted_bipred_flag 0
transquant_bypass_enable_flag 0
tiles_enabled_flag 0
entropy_coding_sync_enabled_flag 0
loop_filter_across_slices_enabled_flag 1
deblocking_filter_control_present_flag 0
pps_scaling_list_data_present_flag 0
lists_modification_present_flag 0
log2_parallel_merge_level 2
slice_segment_header_extension_present_flag 0
pps_extension_flag 0
frame length 21887
Slice 0
nal-type 20
first_slice_segment_in_pic_flag 1
no_output_of_prior_pics_flag 0
slice_pic_parameter_set_id 0
slice_type (0-B, 1-P, 2-I) 2
slice_pic_order_cnt_lsb (derived) 0
SAO params
slice_sao_luma_flag 1
slice_sao_chroma_flag 1
slice_qp 28
slice_loop_filter_across_slices_enabled_flag 1
slice header length 7
Slice 0
nal-type 20
first_slice_segment_in_pic_flag 1
no_output_of_prior_pics_flag 0
slice_pic_parameter_set_id 0
slice_type (0-B, 1-P, 2-I) 2
slice_pic_order_cnt_lsb (derived) 0
SAO params
slice_sao_luma_flag 1
slice_sao_chroma_flag 1
slice_qp 28
slice_loop_filter_across_slices_enabled_flag 1
slice header length 7
Frame 1
frame length 2119
Slice 0
nal-type 1
first_slice_segment_in_pic_flag 1
slice_pic_parameter_set_id 0
slice_type (0-B, 1-P, 2-I) 1
slice_pic_order_cnt_lsb 1
short_term_ref_pic_set_sps_flag 0
num_negative_pics 1
delta_poc_s0[0] 1
used_by_curr_pic_s0_flag[0] 1
num_positive_pics 0
Temporal MV Prediction flag
slice_temporal_mvp_enabled_flag 1
SAO params
slice_sao_luma_flag 1
slice_sao_chroma_flag 1
Slice 0
nal-type 1
first_slice_segment_in_pic_flag 1
slice_pic_parameter_set_id 0
slice_type (0-B, 1-P, 2-I) 1
slice_pic_order_cnt_lsb 1
short_term_ref_pic_set_sps_flag 0
num_negative_pics 1
delta_poc_s0[0] 1
used_by_curr_pic_s0_flag[0] 1
num_positive_pics 0
Temporal MV Prediction flag
slice_temporal_mvp_enabled_flag 1
SAO params
slice_sao_luma_flag 1
slice_sao_chroma_flag 1
num_ref_idx_active_override_flag 0
pred_weight_table
luma_log2_weight_denom 7
delta_chroma_log2_weight_denom -1
luma_weight_l0_flag[0] 0
chroma_weight_l0_flag[0] 0
pred_weight_table
luma_log2_weight_denom 7
delta_chroma_log2_weight_denom -1
luma_weight_l0_flag[0] 0
chroma_weight_l0_flag[0] 0
MaxNumMergeCand 3
slice_qp 28
slice_loop_filter_across_slices_enabled_flag 1
slice header length 12
slice_qp 28
slice_loop_filter_across_slices_enabled_flag 1
slice header length 12
total number parsed frames 2
23+ years’ programming and theoretical experience in the computer science fields such as video compression, media streaming and artificial intelligence (co-author of several papers and patents).
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