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Use QT format for audio sample descriptors depending on stsd version.

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ISOBMFF does not allow AudioSampleEntryV1 in stsd version 0, so
assume the descriptor format is QTFF SoundDescriptionV1. ISOBMFF does
not define a version 2.

This fixes audio decoding for some MP4 files generated with Apple
tools. The additional fields present in SoundDescriptionV1/V2 need to
be read in order to correctly read additional boxes that contain
information required for decoding the stream.

Fixes #7376.

Also see: https://github.com/HandBrake/HandBrake/issues/1555

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
This commit is contained in:
Justin Ruggles 2018-09-05 17:54:57 -04:00 committed by Derek Buitenhuis
parent a75d805e6b
commit d2047c14c0
2 changed files with 4 additions and 3 deletions
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1
libavformat/isom.h
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@ -218,6 +218,7 @@ typedef struct MOVStreamContext {
int *extradata_size;
int last_stsd_index;
int stsd_count;
int stsd_version;
int32_t *display_matrix;
AVStereo3D *stereo3d;

6
libavformat/mov.c
View File

@ -2122,8 +2122,8 @@ static void mov_parse_stsd_audio(MOVContext *c, AVIOContext *pb,
// Read QT version 1 fields. In version 0 these do not exist.
av_log(c->fc, AV_LOG_TRACE, "version =%d, isom =%d\n", version, c->isom);
if (!c->isom ||
(compatible_brands && strstr(compatible_brands->value, "qt "))) {
(compatible_brands && strstr(compatible_brands->value, "qt ")) ||
(sc->stsd_version == 0 && version > 0)) {
if (version == 1) {
sc->samples_per_frame = avio_rb32(pb);
avio_rb32(pb); /* bytes per packet */
@ -2554,7 +2554,7 @@ static int mov_read_stsd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
st = c->fc->streams[c->fc->nb_streams - 1];
sc = st->priv_data;
avio_r8(pb); /* version */
sc->stsd_version = avio_r8(pb);
avio_rb24(pb); /* flags */
entries = avio_rb32(pb);