[FFmpeg-devel] [PATCH] mov: Add an option to toggle dref opening
Derek Buitenhuis
derek.buitenhuis at gmail.com
Fri Jan 15 18:03:49 CET 2016
This feature is mostly only used by NLE software, and is
both of dubious value being enabled by default, and a
possible security risk.
Signed-off-by: Derek Buitenhuis <derek.buitenhuis at gmail.com>
---
libavformat/isom.h | 1 +
libavformat/mov.c | 22 +++++++++++++++++-----
libavformat/version.h | 4 ++--
3 files changed, 20 insertions(+), 7 deletions(-)
diff --git a/libavformat/isom.h b/libavformat/isom.h
index e07dc0e9..99bc7be 100644
--- a/libavformat/isom.h
+++ b/libavformat/isom.h
@@ -227,6 +227,7 @@ typedef struct MOVContext {
struct AVAES *aes_decrypt;
uint8_t *decryption_key;
int decryption_key_len;
+ int enable_drefs;
} MOVContext;
int ff_mp4_read_descr_len(AVIOContext *pb);
diff --git a/libavformat/mov.c b/libavformat/mov.c
index 4cc5ff2..106bdcf 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -3051,13 +3051,23 @@ static int mov_read_trak(MOVContext *c, AVIOContext *pb, MOVAtom atom)
if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
MOVDref *dref = &sc->drefs[sc->dref_id - 1];
- if (mov_open_dref(c, &sc->pb, c->fc->filename, dref,
- &c->fc->interrupt_callback) < 0)
- av_log(c->fc, AV_LOG_ERROR,
- "stream %d, error opening alias: path='%s', dir='%s', "
- "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
+ if (c->enable_drefs) {
+ if (mov_open_dref(c, &sc->pb, c->fc->filename, dref,
+ &c->fc->interrupt_callback) < 0)
+ av_log(c->fc, AV_LOG_ERROR,
+ "stream %d, error opening alias: path='%s', dir='%s', "
+ "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
+ st->index, dref->path, dref->dir, dref->filename,
+ dref->volume, dref->nlvl_from, dref->nlvl_to);
+ } else {
+ av_log(c->fc, AV_LOG_WARNING,
+ "Skipped opening external track: "
+ "stream %d, alias: path='%s', dir='%s', "
+ "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d."
+ "Set enable_drefs to allow this.\n",
st->index, dref->path, dref->dir, dref->filename,
dref->volume, dref->nlvl_from, dref->nlvl_to);
+ }
} else {
sc->pb = c->fc->pb;
sc->pb_is_copied = 1;
@@ -5219,6 +5229,8 @@ static const AVOption mov_options[] = {
AV_OPT_TYPE_BINARY, {.str="77214d4b196a87cd520045fd20a51d67"},
.flags = AV_OPT_FLAG_DECODING_PARAM },
{ "decryption_key", "The media decryption key (hex)", OFFSET(decryption_key), AV_OPT_TYPE_BINARY, .flags = AV_OPT_FLAG_DECODING_PARAM },
+ { "enable_drefs", "Enable external track support.", OFFSET(enable_drefs), AV_OPT_TYPE_BOOL,
+ {.i64 = 0}, 0, 1, FLAGS },
{ NULL },
};
diff --git a/libavformat/version.h b/libavformat/version.h
index ad9ba63..a4feab8 100644
--- a/libavformat/version.h
+++ b/libavformat/version.h
@@ -30,8 +30,8 @@
#include "libavutil/version.h"
#define LIBAVFORMAT_VERSION_MAJOR 57
-#define LIBAVFORMAT_VERSION_MINOR 21
-#define LIBAVFORMAT_VERSION_MICRO 101
+#define LIBAVFORMAT_VERSION_MINOR 22
+#define LIBAVFORMAT_VERSION_MICRO 100
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
LIBAVFORMAT_VERSION_MINOR, \
--
1.8.3.1
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