Send ts file to Medialive

**Describe the bug**

Hello,

I'm trying to send a ts file to AWS Medialive. When I send the file with command line it's work well but I can't send it with ffmpeg.wasm

Here is the error :

```
[info] run ffmpeg command: -re -i http://localhost:8080/video.ts -c copy -map 0 -f rtp_mpegts -fec prompeg=l=5:d=20 rtp://xx.xx.xx.xxx:5000
[fferr] ffmpeg version v0.8.5 Copyright (c) 2000-2020 the FFmpeg developers
[fferr] built with emcc (Emscripten gcc/clang-like replacement) 2.0.8 (d059fd603d0b45b584f634dc2365bc9e9a6ec1dd)
[fferr] configuration: --target-os=none --arch=x86_32 --enable-cross-compile --disable-x86asm --disable-inline-asm --disable-stripping --disable-programs --disable-doc --disable-debug --disable-runtime-cpudetect --disable-autodetect --extra-cflags='-s USE_PTHREADS=1 -I/src/build/include -O3 --closure 1' --extra-cxxflags='-s USE_PTHREADS=1 -I/src/build/include -O3 --closure 1' --extra-ldflags='-s USE_PTHREADS=1 -I/src/build/include -O3 --closure 1 -L/src/build/lib' --pkg-config-flags=--static --nm=llvm-nm --ar=emar --ranlib=emranlib --cc=emcc --cxx=em++ --objcc=emcc --dep-cc=emcc --enable-gpl --enable-nonfree --enable-zlib --enable-libx264 --enable-libx265 --enable-libvpx --enable-libwavpack --enable-libmp3lame --enable-libfdk-aac --enable-libtheora --enable-libvorbis --enable-libfreetype --enable-libopus --enable-libwebp
[fferr] libavutil 56. 51.100 / 56. 51.100
[fferr] libavcodec 58. 91.100 / 58. 91.100
[fferr] libavformat 58. 45.100 / 58. 45.100
[fferr] libavdevice 58. 10.100 / 58. 10.100
[fferr] libavfilter 7. 85.100 / 7. 85.100
[fferr] libswscale 5. 7.100 / 5. 7.100
[fferr] libswresample 3. 7.100 / 3. 7.100
[fferr] libpostproc 55. 7.100 / 55. 7.100
WebSocket connection to 'ws://localhost:8080/' failed: WebSocket opening handshake timed out
[fferr] [tcp @ 0x1a36500] Connection to tcp://localhost:8080 failed: Connection refused
[fferr] http://localhost:8080/video.ts: Connection refused
[ffout] FFMPEG_END
```

**To Reproduce**

The command line :
ffmpeg -re -i video.ts -c copy -map 0 -f rtp_mpegts -fec prompeg=l=5:d=20 rtp://xx.xx.xx.xxx:5000

The code in the React.js app :
```
const res = await ffmpeg.run(
"-re",
"-i",
`${window.location.origin}/video.ts`,
"-c",
"copy",
"-map",
"0",
"-f",
"rtp_mpegts",
"-fec",
"prompeg=l=5:d=20",
"rtp://xx.xx.xx.xxx:5000"
);
```

**Expected behavior**

The same comportement than the command live : video accessible in the preview of mediapackage.

**Additional context**

`"@ffmpeg/ffmpeg": "^0.9.7",`

Thanks a lot !