parse: add support for non-seekable streams about pymediainfo HOT 2 OPEN

Hi @JeromeMartinez, could you please help me implement this?

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Oops, I missed the first ping last year.

Do I naively ignore MediaInfo_Open_Buffer_Continue_GoTo_Get and pass an arbitrary size to MediaInfo_Open_Buffer_Continue like this?

Our usage is to stop the parsing (so exiting the loop then MediaInfo_Open_Buffer_Finalize). Behavior is not so bad there, usually you miss only the duration from MPEG-TS files, or info only from stream content with MP4 with header at the end.

Ignoring MediaInfo_Open_Buffer_Continue_GoTo_Get will work in lot of cases e.g. Matroska, MPEG-TS, MP4 with header at the begining of the file, it will work partially with MP4 with header at the end (it will skip all the data part then read the header i.e. you have to feed with the whole file before there is something interesting, then will try to go back to the beginning for stream content but will fail so no info from the stream content itself, only from the header), it does not hurt, it may just be super slow because you provide the full stream in several cases e.g. MPEG-TS, so like full parsing.

I would recommend to stop the parsing after a seek request if parse_speed is < 1 or if seek request is < current offset, else ignoring the seek request.

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