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Code Issues Releases Activity

avformat/mov: Add option to ignore chapters during parsing

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Chapter-indexing can be expensive since chapters may be interspersed
throughout the entire file and may require many seeks - especially
costly when consuming a video over a remote protocol like http.
Furthermore it is often unnecessary, especially when only trying to get
video info (e.g. via ffprobe).

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Bryan Huh 2015-11-10 11:11:26 -08:00 committed by Michael Niedermayer
parent d9726893f3
commit 85e3c31fd5
2 changed files with 7 additions and 1 deletions
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1
libavformat/isom.h
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@ -190,6 +190,7 @@ typedef struct MOVContext {
int chapter_track;
int use_absolute_path;
int ignore_editlist;
int ignore_chapters;
int seek_individually;
int64_t next_root_atom; ///< offset of the next root atom
int export_all;

7
libavformat/mov.c
View File

@ -462,6 +462,9 @@ static int mov_read_chpl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
char str[256+1];
int ret;
if (c->ignore_chapters)
return 0;
if ((atom.size -= 5) < 0)
return 0;
@ -4635,7 +4638,7 @@ static int mov_read_header(AVFormatContext *s)
av_log(mov->fc, AV_LOG_TRACE, "on_parse_exit_offset=%"PRId64"\n", avio_tell(pb));
if (pb->seekable) {
if (mov->chapter_track > 0)
if (mov->chapter_track > 0 && !mov->ignore_chapters)
mov_read_chapters(s);
for (i = 0; i < s->nb_streams; i++)
if (s->streams[i]->codec->codec_tag == AV_RL32("tmcd"))
@ -5046,6 +5049,8 @@ static const AVOption mov_options[] = {
0, 1, FLAGS},
{"ignore_editlist", "", OFFSET(ignore_editlist), AV_OPT_TYPE_INT, {.i64 = 0},
0, 1, FLAGS},
{"ignore_chapters", "", OFFSET(ignore_chapters), AV_OPT_TYPE_BOOL, {.i64 = 0},
0, 1, FLAGS},
{"use_mfra_for",
"use mfra for fragment timestamps",
OFFSET(use_mfra_for), AV_OPT_TYPE_INT, {.i64 = FF_MOV_FLAG_MFRA_AUTO},