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Extract chapters from mp4 file and write it in a file.

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This commit is contained in:
Saurabh Shrivastava 2017-01-21 01:33:59 +05:30 committed by GitHub
parent 0e4d211eaf
commit c9a3a0c7f2
1 changed files with 102 additions and 12 deletions
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114
src/gpacmp4/mp4.c
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@ -190,6 +190,39 @@ static int process_avc_track(struct lib_ccx_ctx *ctx, const char* basename, GF_I
return status;
}
static char *format_duration(u64 dur, u32 timescale, char *szDur)
{
u32 h, m, s, ms;
if ((dur==(u64) -1) || (dur==(u32) -1)) {
strcpy(szDur, "Unknown");
return szDur;
}
dur = (u64) (( ((Double) (s64) dur)/timescale)*1000);
h = (u32) (dur / 3600000);
m = (u32) (dur/ 60000) - h*60;
s = (u32) (dur/1000) - h*3600 - m*60;
ms = (u32) (dur) - h*3600000 - m*60000 - s*1000;
if (h<=24) {
sprintf(szDur, "%02d:%02d:%02d.%03d", h, m, s, ms);
} else {
u32 d = (u32) (dur / 3600000 / 24);
h = (u32) (dur/3600000)-24*d;
if (d<=365) {
sprintf(szDur, "%d Days, %02d:%02d:%02d.%03d", d, h, m, s, ms);
} else {
u32 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;
}
unsigned char * ccdp_find_data(unsigned char * ccdp_atom_content, unsigned int len, unsigned int *cc_count)
{
unsigned char *data = ccdp_atom_content;
@ -286,7 +319,7 @@ unsigned char * ccdp_find_data(unsigned char * ccdp_atom_content, unsigned int l
*/
int processmp4 (struct lib_ccx_ctx *ctx,struct ccx_s_mp4Cfg *cfg, char *file)
{
int caps = 0;
int mp4_ret = 0;
GF_ISOFile* f;
u32 i, j, track_count, avc_track_count, cc_track_count;
struct cc_subtitle dec_sub;
@ -296,7 +329,7 @@ int processmp4 (struct lib_ccx_ctx *ctx,struct ccx_s_mp4Cfg *cfg, char *file)
dec_ctx = update_decoder_list(ctx);
memset(&dec_sub,0,sizeof(dec_sub));
mprint("opening \'%s\': ", file);
mprint("Opening \'%s\': ", file);
#ifdef MP4_DEBUG
gf_log_set_tool_level(GF_LOG_CONTAINER,GF_LOG_DEBUG);
#endif
@ -330,7 +363,7 @@ int processmp4 (struct lib_ccx_ctx *ctx,struct ccx_s_mp4Cfg *cfg, char *file)
avc_track_count++;
}
mprint("mp4: found %u tracks: %u avc and %u cc\n", track_count, avc_track_count, cc_track_count);
mprint("MP4: found %u tracks: %u avc and %u cc\n", track_count, avc_track_count, cc_track_count);
for(i = 0; i < track_count; i++)
{
@ -349,7 +382,7 @@ int processmp4 (struct lib_ccx_ctx *ctx,struct ccx_s_mp4Cfg *cfg, char *file)
}
if(dec_sub.got_output)
{
caps = 1;
mp4_ret = 1;
encode_sub(enc_ctx, &dec_sub);
dec_sub.got_output = 0;
}
@ -377,7 +410,7 @@ int processmp4 (struct lib_ccx_ctx *ctx,struct ccx_s_mp4Cfg *cfg, char *file)
}
if(dec_sub.got_output)
{
caps = 1;
mp4_ret = 1;
encode_sub(enc_ctx, &dec_sub);
dec_sub.got_output = 0;
}
@ -472,14 +505,14 @@ int processmp4 (struct lib_ccx_ctx *ctx,struct ccx_s_mp4Cfg *cfg, char *file)
if (cc_info == CDP_SECTION_SVC_INFO || cc_info == CDP_SECTION_FOOTER)
{
dbg_print(CCX_DMT_PARSE, "mp4-708: premature end of sample (0x73 or 0x74)\n");
dbg_print(CCX_DMT_PARSE, "MP4-708: premature end of sample (0x73 or 0x74)\n");
break;
}
if ((cc_info == 0xFA || cc_info == 0xFC || cc_info == 0xFD)
&& (cc_data[1] & 0x7F) == 0 && (cc_data[2] & 0x7F) == 0)
{
dbg_print(CCX_DMT_PARSE, "mp4-708: skipped (zero cc data)\n");
dbg_print(CCX_DMT_PARSE, "MP4-708: skipped (zero cc data)\n");
continue;
}
@ -490,7 +523,7 @@ int processmp4 (struct lib_ccx_ctx *ctx,struct ccx_s_mp4Cfg *cfg, char *file)
if (cc_type < 2)
{
dbg_print(CCX_DMT_PARSE, "mp4-708: atom skipped (cc_type < 2)\n");
dbg_print(CCX_DMT_PARSE, "MP4-708: atom skipped (cc_type < 2)\n");
continue;
}
dec_ctx->dtvcc->encoder = (void *)enc_ctx; //WARN: otherwise cea-708 will not work
@ -522,7 +555,7 @@ int processmp4 (struct lib_ccx_ctx *ctx,struct ccx_s_mp4Cfg *cfg, char *file)
tdata += ret;
cb_field1++;
if (dec_sub.got_output) {
caps = 1;
mp4_ret = 1;
encode_sub(enc_ctx, &dec_sub);
dec_sub.got_output = 0;
}
@ -550,7 +583,7 @@ int processmp4 (struct lib_ccx_ctx *ctx,struct ccx_s_mp4Cfg *cfg, char *file)
free(dec_ctx->xds_ctx);
mprint("\nclosing media: ");
mprint("\nClosing media: ");
gf_isom_close(f);
f = NULL;
@ -567,9 +600,66 @@ int processmp4 (struct lib_ccx_ctx *ctx,struct ccx_s_mp4Cfg *cfg, char *file)
if (cc_track_count)
mprint ("Found %d CC track(s).\n", cc_track_count);
else
mprint ("found no dedicated CC track(s).\n");
mprint ("Found no dedicated CC track(s).\n");
ctx->freport.mp4_cc_track_cnt = cc_track_count;
return caps;
return mp4_ret;
}
int dumpchapters (struct lib_ccx_ctx *ctx,struct ccx_s_mp4Cfg *cfg, char *file)
{
int mp4_ret = 0;
GF_ISOFile* f;
mprint("Opening \'%s\': ", file);
#ifdef MP4_DEBUG
gf_log_set_tool_level(GF_LOG_CONTAINER,GF_LOG_DEBUG);
#endif
if((f = gf_isom_open(file, GF_ISOM_OPEN_READ, NULL)) == NULL)
{
mprint("failed to open\n");
return 5;
}
mprint("ok\n");
char szName[1024];
FILE *t;
u32 i, count;
count = gf_isom_get_chapter_count(f, 0);
if(count>0)
{
if (file)
{
strcpy(szName, get_basename(file));
strcat(szName, ".txt");
t = gf_fopen(szName, "wt");
if (!t) return 5;
}
else {
t = stdout;
}
mp4_ret=1;
printf("Writing chapters into %s\n",szName);
}
else
{
mprint("No chapters information found!\n");
}
for (i=0; i<count; i++) {
u64 chapter_time;
const char *name;
char szDur[20];
gf_isom_get_chapter(f, 0, i+1, &chapter_time, &name);
fprintf(t, "CHAPTER%02d=%s\n", i+1, format_duration(chapter_time, 1000, szDur));
fprintf(t, "CHAPTER%02dNAME=%s\n", i+1, name);
}
if (file) gf_fclose(t);
return mp4_ret;
}