#942 Division by zero at low ParseSpeed for certain .ts

[Taloth Saldono]

cli mediainfo crashes with division-by-zero when ParseSpeed is set to 0.2 or lower for a specific .ts file.
Crash occurs on 0.7.76, but doesn't occur on 0.7.74.
I compiled the code to get debug symbols and traced the crash to File_MpegTs.cpp line 1945. Duration is zero.
The file has a couple of text streams, so it probably doesn't find more than one frame at that ParseSpeed resulting in a zero duration.

Originally it crashed in an app that uses the Open_Buffer_Continue api, it happens at around 64k so I can supply the first 128kb or so to repro, lemme know if you need it.
Atm I worked around it by increasing the ParseSpeed to 0.3 for .ts files, which probably a good idea anyway for such files.

Let me know if you need the file fragment or any additional information. Thank you.

[Jerome Martinez]

File_MpegTs.cpp line 1945.

Thanks for having looked at it.

Let me know if you need the file fragment

I do.
(I prefer to have it for checking the exact correct behavior and for doing more than handling the duration of 0 and for adding it to non regression tests)

[Taloth Saldono]

Okay, sent it over the mail.