I run the following commands:
```
kvazaar -i output_1280x720p.yuv --input-res 1280x720 -o output.hvc --tiles 2x2 --slices tiles --mv-constraint frametilemargin --bitrate 128000 --period 30 --input-fps 30

MP4Box -add output.hvc:split_tiles -fps 30 -new video_tiled.mp4

MP4Box -dash 1000 -rap -frag-rap -profile live -out dash_tiled.mpd video_tiled.mp4

```
After running I got the last command , I got .m4s file track ID wise as expected but I am not able to play them on gpac (it says Filter not found for desired type).

Also I want to combine to combine .m4s trackid wise to a tile_x.mp4 file for object detection , so I run the following command

```
cat video_tiled_dash_track2_init.mp4 $(ls -vx video_tiled_dash_track2_*.m4s) > source_2.mp4

```

So, I got source_2.mp4 which was suppose to contain to  track ID 2 but the there is no output of source_2.pm4 with gpac


Can anybody explain why this is happening and help me resolve this?

Thanks in advance!

Please let me know if more details are required


.m4s not playing correctly
This is a GitHub Issue
repo:gpac
owner:gpac
Title : .m4s not playing correctly
Issue date:

--- start body ---
I run the following commands:
```
kvazaar -i output_1280x720p.yuv --input-res 1280x720 -o output.hvc --tiles 2x2 --slices tiles --mv-constraint frametilemargin --bitrate 128000 --period 30 --input-fps 30

MP4Box -add output.hvc:split_tiles -fps 30 -new video_tiled.mp4

MP4Box -dash 1000 -rap -frag-rap -profile live -out dash_tiled.mpd video_tiled.mp4

```
After running I got the last command , I got .m4s file track ID wise as expected but I am not able to play them on gpac (it says Filter not found for desired type).

Also I want to combine to combine .m4s trackid wise to a tile_x.mp4 file for object detection , so I run the following command

```
cat video_tiled_dash_track2_init.mp4 $(ls -vx video_tiled_dash_track2_*.m4s) > source_2.mp4

```

So, I got source_2.mp4 which was suppose to contain to  track ID 2 but the there is no output of source_2.pm4 with gpac


Can anybody explain why this is happening and help me resolve this?

Thanks in advance!

Please let me know if more details are required


--- end body ---
