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).
---
libavformat/isom.h | 1 +
libavformat/mov.c | 7 ++++++-
2 files changed, 7 insertions(+), 1 deletions(-)
diff --git a/libavformat/isom.h b/libavformat/isom.h
index dba30a2..a082e40 100644
--- a/libavformat/isom.h
+++ b/libavformat/isom.h
@@ -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;
diff --git a/libavformat/mov.c b/libavformat/mov.c
index 11c8358..9ed1cb0 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -454,6 +454,9 @@ 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;
@@ -4627,7 +4630,7 @@ 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"))
@@ -5038,6 +5041,8 @@ 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},
--
1.7.1
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