Definition at line 33 of file timecode.h.

Definition at line 35 of file timecode.h.

Adjust frame number for NTSC drop frame time code.

Parameters

framenum frame number to adjust

fps frame per second, multiples of 30

Returns

adjusted frame number

Warning

adjustment is only valid for multiples of NTSC 29.97

Definition at line 35 of file timecode.c.

Referenced by av_timecode_get_smpte_from_framenum(), and av_timecode_make_string().

Convert frame number to SMPTE 12M binary representation.

Parameters

tc timecode data correctly initialized

framenum frame number

Returns

the SMPTE binary representation

See SMPTE ST 314M-2005 Sec 4.4.2.2.1 "Time code pack (TC)" the format description as follows: bits 0-5: hours, in BCD(6bits) bits 6: BGF1 bits 7: BGF2 (NTSC) or FIELD (PAL) bits 8-14: minutes, in BCD(7bits) bits 15: BGF0 (NTSC) or BGF2 (PAL) bits 16-22: seconds, in BCD(7bits) bits 23: FIELD (NTSC) or BGF0 (PAL) bits 24-29: frames, in BCD(6bits) bits 30: drop frame flag (0: non drop, 1: drop) bits 31: color frame flag (0: unsync mode, 1: sync mode)

Note

BCD numbers (6 or 7 bits): 4 or 5 lower bits for units, 2 higher bits for tens.

Frame number adjustment is automatically done in case of drop timecode, you do NOT have to call av_timecode_adjust_ntsc_framenum2().

The frame number is relative to tc->start.

Color frame (CF) and binary group flags (BGF) bits are set to zero.

Definition at line 53 of file timecode.c.

Referenced by dv_write_pack(), mxf_write_system_item(), and decklink_input_callback::VideoInputFrameArrived().

Convert sei info to SMPTE 12M binary representation.

Parameters

rate frame rate in rational form

drop drop flag

hh hour

mm minute

ss second

ff frame number

Returns

the SMPTE binary representation

Definition at line 69 of file timecode.c.

Referenced by av_timecode_get_smpte_from_framenum(), h264_export_frame_props(), and set_side_data().

Load timecode string in buf.

Parameters

buf destination buffer, must be at least AV_TIMECODE_STR_SIZE long

tc timecode data correctly initialized

framenum frame number

Returns

the buf parameter

Note

Timecode representation can be a negative timecode and have more than 24 hours, but will only be honored if the flags are correctly set.

The frame number is relative to tc->start.

Definition at line 103 of file timecode.c.

Referenced by draw_text(), imf_read_header(), mxf_add_timecode_metadata(), parse_timecode_in_framenum_format(), segment_end(), test_cpl_parsing(), and decklink_input_callback::VideoInputFrameArrived().

Get the timecode string from the SMPTE timecode format.

In contrast to av_timecode_make_smpte_tc_string this function supports 50/60 fps timecodes by using the field bit.

Parameters

buf destination buffer, must be at least AV_TIMECODE_STR_SIZE long

rate frame rate of the timecode

tcsmpte the 32-bit SMPTE timecode

prevent_df prevent the use of a drop flag when it is known the DF bit is arbitrary

skip_field prevent the use of a field flag when it is known the field bit is arbitrary (e.g. because it is used as PC flag)

Returns

the buf parameter

Definition at line 138 of file timecode.c.

Referenced by av_timecode_make_smpte_tc_string(), decode_frame(), dump_s12m_timecode(), h264_export_frame_props(), set_side_data(), show_frame(), and wsd_read_header().

Get the timecode string from the SMPTE timecode format.

Parameters

buf destination buffer, must be at least AV_TIMECODE_STR_SIZE long

tcsmpte the 32-bit SMPTE timecode

prevent_df prevent the use of a drop flag when it is known the DF bit is arbitrary

Returns

the buf parameter

Definition at line 162 of file timecode.c.

Get the timecode string from the 25-bit timecode format (MPEG GOP format).

Parameters

buf destination buffer, must be at least AV_TIMECODE_STR_SIZE long

tc25bit the 25-bits timecode

Returns

the buf parameter

Definition at line 167 of file timecode.c.

Referenced by filter_frame(), mpeg_decode_frame(), mpeg_decode_gop(), and show_frame().

Init a timecode struct with the passed parameters.

Parameters

log_ctx a pointer to an arbitrary struct of which the first field is a pointer to an AVClass struct (used for av_log)

tc pointer to an allocated AVTimecode

rate frame rate in rational form

flags miscellaneous flags such as drop frame, +24 hours, ... (see AVTimecodeFlag)

frame_start the first frame number

Returns

0 on success, AVERROR otherwise

Definition at line 221 of file timecode.c.

Referenced by dv_write_header(), mxf_init_timecode(), mxf_parse_physical_source_package(), mxf_parse_structural_metadata(), and parse_timecode_in_framenum_format().

Init a timecode struct from the passed timecode components.

Parameters

log_ctx a pointer to an arbitrary struct of which the first field is a pointer to an AVClass struct (used for av_log)

tc pointer to an allocated AVTimecode

rate frame rate in rational form

flags miscellaneous flags such as drop frame, +24 hours, ... (see AVTimecodeFlag)

hh hours

mm minutes

ss seconds

ff frames

Returns

0 on success, AVERROR otherwise

Definition at line 231 of file timecode.c.

Referenced by av_timecode_init_from_string(), fill_timecode(), and get_bmd_timecode().

Parse timecode representation (hh:mm:ss[:;.

]ff).

Parameters

log_ctx a pointer to an arbitrary struct of which the first field is a pointer to an AVClass struct (used for av_log).

tc pointer to an allocated AVTimecode

rate frame rate in rational form

str timecode string which will determine the frame start

Returns

0 on success, AVERROR otherwise

Definition at line 252 of file timecode.c.

Referenced by dv_write_header(), init(), mov_check_timecode_track(), mxf_init_timecode(), and segment_end().

Check if the timecode feature is available for the given frame rate.

Returns

0 if supported, <0 otherwise

Definition at line 216 of file timecode.c.