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avformat/movenc: add option to use keys/mdta atoms for metadata

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Add -movflags use_metadata_tags to the mov muxer. This will cause
the muxer to write all metadata to the file in the keys and mtda
atoms.

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
David Murmann 2016-06-22 15:27:07 +02:00 committed by Michael Niedermayer
parent dfd0c0f981
commit 0296b4b8d8
2 changed files with 78 additions and 4 deletions
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81
libavformat/movenc.c
View File

@ -70,6 +70,7 @@ static const AVOption options[] = {
{ "global_sidx", "Write a global sidx index at the start of the file", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_GLOBAL_SIDX}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
{ "write_colr", "Write colr atom (Experimental, may be renamed or changed, do not use from scripts)", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_WRITE_COLR}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
{ "write_gama", "Write deprecated gama atom", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_WRITE_GAMA}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
{ "use_metadata_tags", "Use mdta atom for metadata.", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_USE_MDTA}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
FF_RTP_FLAG_OPTS(MOVMuxContext, rtp_flags),
{ "skip_iods", "Skip writing iods atom.", offsetof(MOVMuxContext, iods_skip), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM},
{ "iods_audio_profile", "iods audio profile atom.", offsetof(MOVMuxContext, iods_audio_profile), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 255, AV_OPT_FLAG_ENCODING_PARAM},
@ -3109,7 +3110,71 @@ static int mov_write_ilst_tag(AVIOContext *pb, MOVMuxContext *mov,
return update_size(pb, pos);
}
/* iTunes meta data tag */
static int mov_write_mdta_hdlr_tag(AVIOContext *pb, MOVMuxContext *mov,
AVFormatContext *s)
{
avio_wb32(pb, 33); /* size */
ffio_wfourcc(pb, "hdlr");
avio_wb32(pb, 0);
avio_wb32(pb, 0);
ffio_wfourcc(pb, "mdta");
avio_wb32(pb, 0);
avio_wb32(pb, 0);
avio_wb32(pb, 0);
avio_w8(pb, 0);
return 33;
}
static int mov_write_mdta_keys_tag(AVIOContext *pb, MOVMuxContext *mov,
AVFormatContext *s)
{
AVDictionaryEntry *t = NULL;
int64_t pos = avio_tell(pb);
int64_t curpos, entry_pos;
int count = 0;
avio_wb32(pb, 0); /* size */
ffio_wfourcc(pb, "keys");
avio_wb32(pb, 0);
entry_pos = avio_tell(pb);
avio_wb32(pb, 0); /* entry count */
while (t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX)) {
avio_wb32(pb, strlen(t->key) + 8);
ffio_wfourcc(pb, "mdta");
avio_write(pb, t->key, strlen(t->key));
count += 1;
}
curpos = avio_tell(pb);
avio_seek(pb, entry_pos, SEEK_SET);
avio_wb32(pb, count); // rewrite entry count
avio_seek(pb, curpos, SEEK_SET);
return update_size(pb, pos);
}
static int mov_write_mdta_ilst_tag(AVIOContext *pb, MOVMuxContext *mov,
AVFormatContext *s)
{
AVDictionaryEntry *t = NULL;
int64_t pos = avio_tell(pb);
int count = 1; /* keys are 1-index based */
avio_wb32(pb, 0); /* size */
ffio_wfourcc(pb, "ilst");
while (t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX)) {
int64_t entry_pos = avio_tell(pb);
avio_wb32(pb, 0); /* size */
avio_wb32(pb, count); /* key */
mov_write_string_data_tag(pb, t->value, 0, 1);
update_size(pb, entry_pos);
count += 1;
}
return update_size(pb, pos);
}
/* meta data tags */
static int mov_write_meta_tag(AVIOContext *pb, MOVMuxContext *mov,
AVFormatContext *s)
{
@ -3118,8 +3183,16 @@ static int mov_write_meta_tag(AVIOContext *pb, MOVMuxContext *mov,
avio_wb32(pb, 0); /* size */
ffio_wfourcc(pb, "meta");
avio_wb32(pb, 0);
mov_write_itunes_hdlr_tag(pb, mov, s);
mov_write_ilst_tag(pb, mov, s);
if (mov->flags & FF_MOV_FLAG_USE_MDTA) {
mov_write_mdta_hdlr_tag(pb, mov, s);
mov_write_mdta_keys_tag(pb, mov, s);
mov_write_mdta_ilst_tag(pb, mov, s);
}
else {
/* iTunes metadata tag */
mov_write_itunes_hdlr_tag(pb, mov, s);
mov_write_ilst_tag(pb, mov, s);
}
size = update_size(pb, pos);
return size;
}
@ -3231,7 +3304,7 @@ static int mov_write_udta_tag(AVIOContext *pb, MOVMuxContext *mov,
mov_write_3gp_udta_tag(pb_buf, s, "cprt", "copyright");
mov_write_3gp_udta_tag(pb_buf, s, "yrrc", "date");
mov_write_loci_tag(s, pb_buf);
} else if (mov->mode == MODE_MOV) { // the title field breaks gtkpod with mp4 and my suspicion is that stuff is not valid in mp4
} else if (mov->mode == MODE_MOV && !(mov->flags & FF_MOV_FLAG_USE_MDTA)) { // the title field breaks gtkpod with mp4 and my suspicion is that stuff is not valid in mp4
mov_write_string_metadata(s, pb_buf, "\251ART", "artist", 0);
mov_write_string_metadata(s, pb_buf, "\251nam", "title", 0);
mov_write_string_metadata(s, pb_buf, "\251aut", "author", 0);

1
libavformat/movenc.h
View File

@ -234,6 +234,7 @@ typedef struct MOVMuxContext {
#define FF_MOV_FLAG_GLOBAL_SIDX (1 << 14)
#define FF_MOV_FLAG_WRITE_COLR (1 << 15)
#define FF_MOV_FLAG_WRITE_GAMA (1 << 16)
#define FF_MOV_FLAG_USE_MDTA (1 << 17)
int ff_mov_write_packet(AVFormatContext *s, AVPacket *pkt);