settb - FFmpeg 1.0.10 / Sources / Multimedia

Set the timebase to use for the output frames timestamps. It is mainly useful for testing timebase configuration.

It accepts in input an arithmetic expression representing a rational. The expression can contain the constants "AVTB" (the default timebase), "intb" (the input timebase) and "sr" (the sample rate, audio only).

The default value for the input is "intb".

Examples

Set the timebase to 1/25:
```
settb=1/25
```
Set the timebase to 1/10:
```
settb=0.1
```
Set the timebase to 1001/1000:
```
settb=1+0.001
```
Set the timebase to 2*intb:
```
settb=2*intb
```
Set the default timebase value:
```
settb=AVTB
```