Adjust frame number for NTSC drop frame time code.

Parameters

framenum frame number to adjust

fps frame per second, 30 or 60

Returns

adjusted frame number

Warning

adjustment is only valid in NTSC 29.97 and 59.94

Definition at line 34 of file timecode.c.

Referenced by av_timecode_get_smpte_from_framenum(), av_timecode_make_string(), and mpeg1_encode_sequence_header().

Convert frame number to SMPTE 12M binary representation.

Parameters

tc timecode data correctly initialized

framenum frame number

Returns

the SMPTE binary representation

Note

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), binary group flags (BGF) and biphase mark polarity correction (PC) bits are set to zero.

Definition at line 55 of file timecode.c.

Referenced by dv_write_pack(), and mxf_write_system_item().

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 84 of file timecode.c.

Referenced by draw_text(), mxf_add_timecode_metadata(), and parse_timecode_in_framenum_format().

Definition at line 109 of file timecode.c.

Referenced by av_timecode_make_smpte_tc_string().

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 118 of file timecode.c.

Referenced by dv_extract_timecode().

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 130 of file timecode.c.

Referenced by mpeg_decode_gop(), and show_stream().

Definition at line 141 of file timecode.c.

Referenced by av_timecode_check_frame_rate(), and check_timecode().

Definition at line 152 of file timecode.c.

Referenced by av_timecode_init(), and av_timecode_init_from_string().

Definition at line 170 of file timecode.c.

Referenced by av_timecode_check_frame_rate(), av_timecode_init(), and av_timecode_init_from_string().

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

Returns

0 if supported, <0 otherwise

Definition at line 177 of file timecode.c.

Referenced by find_fps().

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 182 of file timecode.c.

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

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 192 of file timecode.c.

Referenced by dv_write_header(), encode_init(), init(), mov_create_timecode_track(), and mxf_write_header().