ffmpeg解码上下文AVCodecContext

[cherishman2005]

AVCodecContext

$1 = {av_class = 0x14334a0 <av_codec_context_class>, log_level_offset = 0, codec_type = AVMEDIA_TYPE_VIDEO, codec = 0x19823e0 <ff_hevc_decoder>, codec_id = AV_CODEC_ID_HEVC, codec_tag = 0, priv_data = 0x7fff88003b00, 
  internal = 0x7fff88006900, opaque = 0x0, bit_rate = 200000, bit_rate_tolerance = 4000000, global_quality = 0, compression_level = -1, flags = 4718592, flags2 = 0, extradata = 0x7fff88003640 "", extradata_size = 82, time_base = {
    num = 1, den = 24}, ticks_per_frame = 1, delay = 0, width = 544, height = 816, coded_width = 544, coded_height = 816, gop_size = 12, pix_fmt = AV_PIX_FMT_YUV420P, draw_horiz_band = 0x0, 
  get_format = 0x792ec0 <avcodec_default_get_format>, max_b_frames = 0, b_quant_factor = 1.25, b_frame_strategy = 0, b_quant_offset = 1.25, has_b_frames = 0, mpeg_quant = 0, i_quant_factor = -0.800000012, i_quant_offset = 0, 
  lumi_masking = 0, temporal_cplx_masking = 0, spatial_cplx_masking = 0, p_masking = 0, dark_masking = 0, slice_count = 0, prediction_method = 0, slice_offset = 0x0, sample_aspect_ratio = {num = 0, den = 1}, me_cmp = 0, 
  me_sub_cmp = 0, mb_cmp = 0, ildct_cmp = 8, dia_size = 0, last_predictor_count = 0, pre_me = 0, me_pre_cmp = 0, pre_dia_size = 0, me_subpel_quality = 8, me_range = 0, slice_flags = 0, mb_decision = 0, intra_matrix = 0x0, 
  inter_matrix = 0x0, scenechange_threshold = 0, noise_reduction = 0, intra_dc_precision = 0, skip_top = 0, skip_bottom = 0, mb_lmin = 236, mb_lmax = 3658, me_penalty_compensation = 256, bidir_refine = 1, brd_scale = 0, 
  keyint_min = 25, refs = 1, chromaoffset = 0, mv0_threshold = 256, b_sensitivity = 40, color_primaries = AVCOL_PRI_UNSPECIFIED, color_trc = AVCOL_TRC_UNSPECIFIED, colorspace = AVCOL_SPC_UNSPECIFIED, color_range = AVCOL_RANGE_MPEG, 
  chroma_sample_location = AVCHROMA_LOC_LEFT, slices = 0, field_order = AV_FIELD_UNKNOWN, sample_rate = 0, channels = 0, sample_fmt = AV_SAMPLE_FMT_NONE, frame_size = 0, frame_number = 0, block_align = 0, cutoff = 0, 
  channel_layout = 0, request_channel_layout = 0, audio_service_type = AV_AUDIO_SERVICE_TYPE_MAIN, request_sample_fmt = AV_SAMPLE_FMT_U8, get_buffer2 = 0x7904f0 <avcodec_default_get_buffer2>, refcounted_frames = 0, qcompress = 0.5, 
  qblur = 0.5, qmin = 2, qmax = 31, max_qdiff = 3, rc_buffer_size = 0, rc_override_count = 0, rc_override = 0x0, rc_max_rate = 0, rc_min_rate = 0, rc_max_available_vbv_use = 0, rc_min_vbv_overflow_use = 3, 
  rc_initial_buffer_occupancy = 0, coder_type = 0, context_model = 0, frame_skip_threshold = 0, frame_skip_factor = 0, frame_skip_exp = 0, frame_skip_cmp = 13, trellis = 0, min_prediction_order = 0, max_prediction_order = 0, 
  timecode_frame_start = -1, rtp_callback = 0x0, rtp_payload_size = 0, mv_bits = 0, header_bits = 0, i_tex_bits = 0, p_tex_bits = 0, i_count = 0, p_count = 0, skip_count = 0, misc_bits = 0, frame_bits = 0, stats_out = 0x0, 
  stats_in = 0x0, workaround_bugs = 1, strict_std_compliance = 0, error_concealment = 3, debug = 0, err_recognition = 0, reordered_opaque = -9223372036854775808, hwaccel = 0x0, hwaccel_context = 0x0, error = {0, 0, 0, 0, 0, 0, 0, 0}, 
  dct_algo = 0, idct_algo = 0, bits_per_coded_sample = 0, bits_per_raw_sample = 0, lowres = 0, coded_frame = 0x0, thread_count = 1, thread_type = 1, active_thread_type = 0, thread_safe_callbacks = 0, 
  execute = 0x712090 <avcodec_default_execute>, execute2 = 0x712110 <avcodec_default_execute2>, nsse_weight = 8, profile = 1, level = 90, skip_loop_filter = AVDISCARD_DEFAULT, skip_idct = AVDISCARD_DEFAULT, 
  skip_frame = AVDISCARD_DEFAULT, subtitle_header = 0x0, subtitle_header_size = 0, vbv_delay = 0, side_data_only_packets = 1, initial_padding = 0, framerate = {num = 24, den = 1}, sw_pix_fmt = AV_PIX_FMT_NONE, pkt_timebase = {num = 0, 
    den = 1}, codec_descriptor = 0x133dae0 <codec_descriptors+8256>, pts_correction_num_faulty_pts = 0, pts_correction_num_faulty_dts = 0, pts_correction_last_pts = -9223372036854775808, pts_correction_last_dts = -9223372036854775808, 
  sub_charenc = 0x0, sub_charenc_mode = 0, skip_alpha = 0, seek_preroll = 0, debug_mv = 0, chroma_intra_matrix = 0x0, dump_separator = 0x0, codec_whitelist = 0x0, properties = 0, coded_side_data = 0x0, nb_coded_side_data = 0, 
  hw_frames_ctx = 0x0, sub_text_format = 0, trailing_padding = 0, max_pixels = 2147483647, hw_device_ctx = 0x0, hwaccel_flags = 1, apply_cropping = 1, extra_hw_frames = -1, discard_damaged_percentage = 95, max_samples = 0, 
  export_side_data = 0, get_encode_buffer = 0x7dc080 <avcodec_default_get_encode_buffer>}

[cherishman2005]

解码上下文AVCodecContext包含了width,heigth：