[FFmpeg-user] ffprobe with mpegts/udp

[Ted Park]

> On Feb 9, 2019, at 10:52 AM, Andriy Gelman <andriy.gelman at gmail.com> wrote:
> 
> I also have the issue when trying to recover the binary data from the
> mpegts container via udp:
> 
> For example, this works fine
> 
> *$ echo "hello" > testfile.dat *
> *$ ffmpeg -f bin -i testfile.dat -c copy -f mpegts output.ts*
> *$ ffmpeg -f mpegts -i output.ts -c copy -map 0 -f data out.dat    #
> out.dat is the same as testfile.dat*
> 
> However, when using udp, ffmpeg hangs (maybe expecting more data?):
> 
> *$ ffmpeg -f bin -i testfile.dat -c copy -f mpegts udp://127.0.0.1:6500
> <http://127.0.0.1:6500>*
> 
> *$ ffmpeg -f mpegts -i udp://127.0.0.1:6500 <http://127.0.0.1:6500> -c copy
> -map 0 -f data out.dat*

Surely there were some errors in the output that might give some indication as to what is happening? I don’t see how stream copying a text file into a TS would result in a working stream, I assume it has something to do with that.

> However, when using udp, ffmpeg hangs (maybe expecting more data?):

Are you running the commands in that order? If everything else was working, the first command would finish streaming very quickly, and the second command would get nothing. You would have to start listening on the port first.