Thanks for reporting your issue. Please make sure these boxes are checked before submitting your issue - thank you!

- [x] I looked for a similar issue and couldn't find any.
- [x] I tried with the latest version of GPAC. Installers available at http://gpac.io/downloads/gpac-nightly-builds/
- [x] I give enough information for contributors to reproduce my issue (meaningful title, github labels, platform and compiler, command-line ...). I can share files anonymously with this dropbox: https://www.mediafire.com/filedrop/filedrop_hosted.php?drop=eec9e058a9486fe4e99c33021481d9e1826ca9dbc242a6cfaab0fe95da5e5d95

Detailed guidelines: http://gpac.io/2013/07/16/how-to-file-a-bug-properly/

We compile the lastest Osmo4 project and find some issues:

We load the following video: http://download.tsi.telecom-paristech.fr/gpac/SRD/tears_of_steal/tos_srd_all.mpd.
And we call this method to switch the bit rate of dash.

```
gf_dash_switch_quality(ctx->dash, GF_TRUE, GF_TRUE);
```
It will take about 5 seconds to see the effect.

And we try to seek the time by calling the following method, then It will take about 5 seconds similarly.

```
gf_dash_seek(dash, 0);
```

[issues] It will take about 5 seconds to switch the bit rate of dash 
This is a GitHub Issue
repo:gpac
owner:gpac
Title : [issues] It will take about 5 seconds to switch the bit rate of dash 
Issue date:

--- start body ---
Thanks for reporting your issue. Please make sure these boxes are checked before submitting your issue - thank you!

- [x] I looked for a similar issue and couldn't find any.
- [x] I tried with the latest version of GPAC. Installers available at http://gpac.io/downloads/gpac-nightly-builds/
- [x] I give enough information for contributors to reproduce my issue (meaningful title, github labels, platform and compiler, command-line ...). I can share files anonymously with this dropbox: https://www.mediafire.com/filedrop/filedrop_hosted.php?drop=eec9e058a9486fe4e99c33021481d9e1826ca9dbc242a6cfaab0fe95da5e5d95

Detailed guidelines: http://gpac.io/2013/07/16/how-to-file-a-bug-properly/

We compile the lastest Osmo4 project and find some issues:

We load the following video: http://download.tsi.telecom-paristech.fr/gpac/SRD/tears_of_steal/tos_srd_all.mpd.
And we call this method to switch the bit rate of dash.

```
gf_dash_switch_quality(ctx->dash, GF_TRUE, GF_TRUE);
```
It will take about 5 seconds to see the effect.

And we try to seek the time by calling the following method, then It will take about 5 seconds similarly.

```
gf_dash_seek(dash, 0);
```

--- end body ---

None