Set PTS and DTS in packets.

It accepts the following parameters:

ts, pts, dts

Set expressions for PTS, DTS or both.

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 ts or dts option or presentation timestamp in case of pts option.

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.

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_OUTDTS

The previous output DTS.

PREV_OUTPTS

The previous output PTS.

TB

The timebase of stream packet belongs.

SR

The sample rate of stream packet belongs.