setts
Set PTS and DTS in packets.
It accepts the following parameters:
- ts
- pts
- dts
Set expressions for PTS, DTS or both.
- duration
Set expression for duration.
- time_base
Set output time base.
The expressions are evaluated through the eval API and can contain the following constants:
- N
The count of the input packet. Starting from 0.
- TS
The demux timestamp in input in case of
tsordtsoption or presentation timestamp in case ofptsoption.- POS
The original position in the file of the packet, or undefined if undefined for the current packet
- DTS
The demux timestamp in input.
- PTS
The presentation timestamp in input.
- DURATION
The duration in input.
- STARTDTS
The DTS of the first packet.
- STARTPTS
The PTS of the first packet.
- PREV_INDTS
The previous input DTS.
- PREV_INPTS
The previous input PTS.
- PREV_INDURATION
The previous input duration.
- PREV_OUTDTS
The previous output DTS.
- PREV_OUTPTS
The previous output PTS.
- PREV_OUTDURATION
The previous output duration.
- NEXT_DTS
The next input DTS.
- NEXT_PTS
The next input PTS.
- NEXT_DURATION
The next input duration.
- TB
The timebase of stream packet belongs.
- TB_OUT
The output timebase.
- SR
The sample rate of stream packet belongs.
- NOPTS
The AV_NOPTS_VALUE constant.
For example, to set PTS equal to DTS (not recommended if B-frames are involved):
ffmpeg -i INPUT -c:a copy -bsf:a setts=pts=DTS out.mkv