This is regarding the bug: https://bugs.kde.org/show_bug.cgi?id=240409
The file attached decodes m4b files and displays the chapter markers and
the time. To compile it please install the "libmp4v2-dev" package ( add
option -lmp4v2 while compiling ). For this to work I need the file path and
file name, but the Meta::TrackPtr class provides everything but that
information.
Here are questions I really need help with answering
How can I obtain the filepath and filename?
One of the comments previously mentioned that mp4v2 was removed, so it is
possible for me to add it back again? or should I program the offset
calculation for the chapters myself? If it is okay to add, How do i add?
#include <mp4v2/mp4v2.h>
#include <stdio.h>
/*
* format a duration to a readable format ("stolen" from gpac MP4Box)
*/
static char *format_duration(uint64_t dur, char *szDur)
{
uint32_t h, m, s, ms;
h = (uint32_t) (dur / 3600000);
m = (uint32_t) (dur / 60000) - h * 60;
s = (uint32_t) (dur / 1000) - h * 3600 - m * 60;
ms = (uint32_t) (dur) - h * 3600000 - m * 60000 - s * 1000;
if (h<=24)
{
sprintf(szDur, "%02d:%02d:%02d.%03d", h, m, s, ms);
}
else
{
uint32_t d = (uint32_t) (dur / 3600000 / 24);
h = (uint32_t) (dur/3600000)-24*d;
if (d<=365)
{
sprintf(szDur, "%d Days, %02d:%02d:%02d.%03d", d, h, m, s, ms);
}
else
{
uint32_t y=0;
while (d>365)
{
y++;
d-=365;
if (y%4) d--;
}
sprintf(szDur, "%d Years %d Days, %02d:%02d:%02d.%03d", y, d, h, m, s, ms);
}
}
return szDur;
}
/*
* List chapter start time and title
*/
void ListChapters(MP4FileHandle hFile, MP4ChapterType fromChapterType)
{
MP4Chapter_t * chapters = 0;
uint32_t chapterCount = 0;
char szDur[20] = {0};
MP4Duration durationSum = 0;
// get the list of chapters
MP4ChapterType type = MP4GetChapters(hFile, &chapters, &chapterCount, fromChapterType);
if (0 == chapterCount)
{
return;
}
// start output (in mp4box format)
switch(type)
{
case MP4ChapterTypeQt:
fprintf(stdout, "\nQuickTime");
break;
case MP4ChapterTypeNero:
fprintf(stdout, "\nNero");
break;
default:
fprintf(stdout, "\nUnknown");
}
fprintf(stdout, " Chapters:\n");
for (uint32_t i = 0; i < chapterCount; ++i)
{
// get the tile
const char * title = chapters[i].title;
// format the start time
const char * formattedDuration = format_duration(durationSum, szDur);
// print the infos
fprintf(stdout, "\tChapter #%u - %s - \"%s\"\n", i+1, formattedDuration, title);
// add the duration of this chapter to the sum (is the start time of the next chapter)
durationSum += chapters[i].duration;
}
// free up the memory
MP4Free(chapters);
}
int main(int argc,char** argv)
{
MP4FileHandle h = 0;
MP4ChapterType chapterType = MP4ChapterTypeAny;
h = MP4Read(argv[1]);
if (h == MP4_INVALID_FILE_HANDLE)
{
printf("Could not open '%s'... aborting\n",argv[1]);
return -1;
}
ListChapters(h, chapterType);
return 0;
}
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