Re: [FFmpeg-devel] [FFmpeg-cvslog] fftools/graphprint: Now, make it a Killer-Feature!

["softworkz ." <softworkz-at-hotmail.com@ffmpeg.org>]

> -----Original Message-----
> From: ffmpeg-devel <ffmpeg-devel-bounces@ffmpeg.org> On Behalf Of Marton
> Balint
> Sent: Freitag, 16. Mai 2025 02:00
> To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
> Subject: Re: [FFmpeg-devel] [FFmpeg-cvslog] fftools/graphprint: Now, make it a
> Killer-Feature!
> 
> 
> 
> On Thu, 15 May 2025, softworkz . wrote:
> 
> >
> >
> >> -----Original Message-----
> >> From: ffmpeg-devel <ffmpeg-devel-bounces@ffmpeg.org> On Behalf Of Ramiro
> Polla
> >> Sent: Donnerstag, 15. Mai 2025 23:50
> >> To: ffmpeg-devel@ffmpeg.org
> >> Subject: Re: [FFmpeg-devel] [FFmpeg-cvslog] fftools/graphprint: Now, make
> it a
> >> Killer-Feature!
> >>
> >> Hi,
> >>
> >> On Thu, May 15, 2025 at 11:11 PM softworkz <git@videolan.org> wrote:
> >> [...]
> >>> diff --git a/fftools/graph/filelauncher.c b/fftools/graph/filelauncher.c
> >>> new file mode 100644
> >>> index 0000000000..45514ca599
> >>> --- /dev/null
> >>> +++ b/fftools/graph/filelauncher.c
> >> [...]
> >>> +int ff_open_html_in_browser(const char *html_path)
> >>> +{
> >>> +    if (!html_path || !*html_path)
> >>> +        return -1;
> >>> +
> >>> +#if defined(_WIN32)
> >>> +
> >>> +    // --- Windows ---------------------------------
> >>> +    {
> >>> +        HINSTANCE rc = ShellExecuteA(NULL, "open", html_path, NULL, NULL,
> >> SW_SHOWNORMAL);
> >>> +        if ((UINT_PTR)rc <= 32) {
> >>> +            // Fallback: system("start ...")
> >>> +            char cmd[1024];
> >>> +            _snprintf_s(cmd, sizeof(cmd), _TRUNCATE, "start \"\" \"%s\"",
> >> html_path);
> >>> +            if (system(cmd) != 0)
> >>> +                return -1;
> >>> +        }
> >>> +        return 0;
> >>> +    }
> >>> +
> >>> +#elif defined(__APPLE__)
> >>> +
> >>> +    // --- macOS -----------------------------------
> >>> +    {
> >>> +        // "open" is the macOS command to open a file/URL with the
> default
> >> application
> >>> +        char cmd[1024];
> >>> +        snprintf(cmd, sizeof(cmd), "open '%s' 1>/dev/null 2>&1 &",
> >> html_path);
> >>> +        if (system(cmd) != 0)
> >>> +            return -1;
> >>> +        return 0;
> >>> +    }
> >>> +
> >>> +#else
> >>> +
> >>> +    // --- Linux / Unix-like -----------------------
> >>> +    // We'll try xdg-open, then gnome-open, then kfmclient
> >>> +    {
> >>> +        // Helper macro to try one browser command
> >>> +        // Returns 0 on success, -1 on failure
> >>> +        #define TRY_CMD(prog) do {                                   \
> >>> +            char buf[1024];                                          \
> >>> +            snprintf(buf, sizeof(buf), "%s '%s' 1>/dev/null 2>&1 &", \
> >>> +                     (prog), html_path);                              \
> >>> +            int ret = system(buf);                                    \
> >>> +            /* On Unix: system() returns -1 if the shell can't run. */\
> >>> +            /* Otherwise, check exit code in lower 8 bits.           */\
> >>> +            if (ret != -1 && WIFEXITED(ret) && WEXITSTATUS(ret) == 0) \
> >>> +                return 0;                                             \
> >>> +        } while (0)
> >>> +
> >>> +        TRY_CMD("xdg-open");
> >>> +        TRY_CMD("gnome-open");
> >>> +        TRY_CMD("kfmclient exec");
> >>> +
> >>> +        fprintf(stderr, "Could not open '%s' in a browser.\n",
> html_path);
> >>> +        return -1;
> >>> +    }
> >>> +
> >>> +#endif
> >>> +}
> >> [...]
> >>
> >> Sorry I didn't have a closer look at the patchset while it was under
> >> review, but system(cmd) is a big no-no. We could create a file with an
> >> explicit path passed by the user, but then it's up to the user to open
> >> it.
> >
> > What's bad about opening a file in the browser when that's the documented
> > behavior of the cli parameter?
> 
> Because ffmpeg is not a browser opener tool, but a transcoding tool. An
> argument can be made for every feature you can think of (Why not add an
> option which shuts down a computer when the transcoding is done? Why not
> add a playable DOOM implementation so the user will not be bored when
> waiting for the transcode to finish).
> 
> Let's just revert this. The many ffmpeg cli frontends can open browsers if
> they want.

Many good arguments can be found for both sides.

> Because ffmpeg is not a browser opener tool

By all respect, this isn't one.


Anyway, I will let the TC decide about this, then.

Thanks,
sw

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