I am building GPAC on OSX.

When running `make` in directory gpac_public:
```
cd ../gpac_public
./configure --extra-cflags=-Wno-deprecated
make
sudo make install
```
I encounter an error called "filters/ff_dmx.c:249:16: error: no member named 'first_dts' in 'struct AVStream'"
I have already looked for `ff_dmx.c` and `libavformat/avformat.h` where "struct AVStream" is defined. I even include `libavformat/avformat.h` into `ff_dmx.c`. However, it does not solve the problem.

Can anyone encounter this error? How to fix it?
GPAC Build error: no member named 'first_dts' in 'struct AVStream'
This is a GitHub Issue
repo:gpac
owner:gpac
Title : GPAC Build error: no member named 'first_dts' in 'struct AVStream'
Issue date:

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I am building GPAC on OSX.

When running `make` in directory gpac_public:
```
cd ../gpac_public
./configure --extra-cflags=-Wno-deprecated
make
sudo make install
```
I encounter an error called "filters/ff_dmx.c:249:16: error: no member named 'first_dts' in 'struct AVStream'"
I have already looked for `ff_dmx.c` and `libavformat/avformat.h` where "struct AVStream" is defined. I even include `libavformat/avformat.h` into `ff_dmx.c`. However, it does not solve the problem.

Can anyone encounter this error? How to fix it?
--- end body ---
