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Read mov files where the moov atom is hidden within a free atom.

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Fixes ticket #1551 / issue 2226.
This commit is contained in:
Carl Eugen Hoyos 2014-05-31 15:39:35 +02:00
parent aab2e939a9
commit 26b0d7198e
2 changed files with 18 additions and 0 deletions
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1
libavformat/isom.h
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@ -169,6 +169,7 @@ typedef struct MOVContext {
int64_t next_root_atom; ///< offset of the next root atom
int *bitrates; ///< bitrates read before streams creation
int bitrates_count;
int moov_retry;
} MOVContext;
int ff_mp4_read_descr_len(AVIOContext *pb);

17
libavformat/mov.c
View File

@ -3120,6 +3120,19 @@ static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom)
if (atom.size >= 8) {
a.size = avio_rb32(pb);
a.type = avio_rl32(pb);
if (a.type == MKTAG('f','r','e','e') &&
a.size >= 8 &&
c->moov_retry) {
uint8_t buf[8];
uint32_t *type = (uint32_t *)buf + 1;
avio_read(pb, buf, 8);
avio_seek(pb, -8, SEEK_CUR);
if (*type == MKTAG('m','v','h','d') ||
*type == MKTAG('c','m','o','v')) {
av_log(c->fc, AV_LOG_ERROR, "Detected moov in a free atom.\n");
a.type = MKTAG('m','o','o','v');
}
}
if (atom.type != MKTAG('r','o','o','t') &&
atom.type != MKTAG('m','o','o','v'))
{
@ -3486,11 +3499,15 @@ static int mov_read_header(AVFormatContext *s)
atom.size = INT64_MAX;
/* check MOV header */
do {
if (mov->moov_retry)
avio_seek(pb, 0, SEEK_SET);
if ((err = mov_read_default(mov, pb, atom)) < 0) {
av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
mov_read_close(s);
return err;
}
} while (pb->seekable && !mov->found_moov && !mov->moov_retry++);
if (!mov->found_moov) {
av_log(s, AV_LOG_ERROR, "moov atom not found\n");
mov_read_close(s);