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mov: Add an option to toggle dref opening

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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@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Derek Buitenhuis 2016-01-15 17:03:49 +00:00 committed by Michael Niedermayer
parent 868a2ed568
commit 712d962a6a
3 changed files with 20 additions and 7 deletions
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1
libavformat/isom.h
View File

@ -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);

22
libavformat/mov.c
View File

@ -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 },
};

4
libavformat/version.h
View File

@ -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, \