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avformat/movenc: added ability to use original stream ids as track ids instead of regenerating them

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Sometimes it's useful to be able to define the exact track numbers in
the generated track, instead of always beginning at track id 1. Using
the option use_stream_ids_as_track_ids now copies the use stream ids
to track ids. Dynamically generated tracks (ie. tmcd) have their track
numbers defined as continuing from the highest numbered stream id.

Signed-off-by: Erkki Seppälä <erkki.seppala.ext@nokia.com>
Signed-off-by: OZOPlayer <OZOPL@nokia.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Erkki Seppälä 2016-08-31 14:35:44 +03:00 committed by Michael Niedermayer
parent aabe12eba3
commit 499e8b0952
2 changed files with 57 additions and 6 deletions
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61
libavformat/movenc.c
View File

@ -89,6 +89,7 @@ static const AVOption options[] = {
{ "encryption_scheme", "Configures the encryption scheme, allowed values are none, cenc-aes-ctr", offsetof(MOVMuxContext, encryption_scheme_str), AV_OPT_TYPE_STRING, {.str = NULL}, .flags = AV_OPT_FLAG_ENCODING_PARAM },
{ "encryption_key", "The media encryption key (hex)", offsetof(MOVMuxContext, encryption_key), AV_OPT_TYPE_BINARY, .flags = AV_OPT_FLAG_ENCODING_PARAM },
{ "encryption_kid", "The media encryption key identifier (hex)", offsetof(MOVMuxContext, encryption_kid), AV_OPT_TYPE_BINARY, .flags = AV_OPT_FLAG_ENCODING_PARAM },
{ "use_stream_ids_as_track_ids", "use stream ids as track ids", offsetof(MOVMuxContext, use_stream_ids_as_track_ids), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM},
{ NULL },
};
@ -3435,6 +3436,52 @@ static void build_chunks(MOVTrack *trk)
}
}
/**
* Assign track ids. If option "use_stream_ids_as_track_ids" is set,
* the stream ids are used as track ids.
*
* This assumes mov->tracks and s->streams are in the same order and
* there are no gaps in either of them (so mov->tracks[n] refers to
* s->streams[n]).
*
* As an exception, there can be more entries in
* s->streams than in mov->tracks, in which case new track ids are
* generated (starting after the largest found stream id).
*/
static int mov_setup_track_ids(MOVMuxContext *mov, AVFormatContext *s)
{
int i;
if (mov->track_ids_ok)
return 0;
if (mov->use_stream_ids_as_track_ids) {
int next_generated_track_id = 0;
for (i = 0; i < s->nb_streams; i++) {
if (s->streams[i]->id > next_generated_track_id)
next_generated_track_id = s->streams[i]->id;
}
for (i = 0; i < mov->nb_streams; i++) {
if (mov->tracks[i].entry <= 0 && !(mov->flags & FF_MOV_FLAG_FRAGMENT))
continue;
mov->tracks[i].track_id = i >= s->nb_streams ? ++next_generated_track_id : s->streams[i]->id;
}
} else {
for (i = 0; i < mov->nb_streams; i++) {
if (mov->tracks[i].entry <= 0 && !(mov->flags & FF_MOV_FLAG_FRAGMENT))
continue;
mov->tracks[i].track_id = i + 1;
}
}
mov->track_ids_ok = 1;
return 0;
}
static int mov_write_moov_tag(AVIOContext *pb, MOVMuxContext *mov,
AVFormatContext *s)
{
@ -3443,12 +3490,13 @@ static int mov_write_moov_tag(AVIOContext *pb, MOVMuxContext *mov,
avio_wb32(pb, 0); /* size placeholder*/
ffio_wfourcc(pb, "moov");
mov_setup_track_ids(mov, s);
for (i = 0; i < mov->nb_streams; i++) {
if (mov->tracks[i].entry <= 0 && !(mov->flags & FF_MOV_FLAG_FRAGMENT))
continue;
mov->tracks[i].time = mov->time;
mov->tracks[i].track_id = i + 1;
if (mov->tracks[i].entry)
build_chunks(&mov->tracks[i]);
@ -3529,7 +3577,7 @@ static void param_write_hex(AVIOContext *pb, const char *name, const uint8_t *va
avio_printf(pb, "<param name=\"%s\" value=\"%s\" valuetype=\"data\"/>\n", name, buf);
}
static int mov_write_isml_manifest(AVIOContext *pb, MOVMuxContext *mov)
static int mov_write_isml_manifest(AVIOContext *pb, MOVMuxContext *mov, AVFormatContext *s)
{
int64_t pos = avio_tell(pb);
int i;
@ -3552,12 +3600,13 @@ static int mov_write_isml_manifest(AVIOContext *pb, MOVMuxContext *mov)
avio_printf(pb, "</head>\n");
avio_printf(pb, "<body>\n");
avio_printf(pb, "<switch>\n");
mov_setup_track_ids(mov, s);
for (i = 0; i < mov->nb_streams; i++) {
MOVTrack *track = &mov->tracks[i];
const char *type;
/* track->track_id is initialized in write_moov, and thus isn't known
* here yet */
int track_id = i + 1;
int track_id = track->track_id;
if (track->par->codec_type == AVMEDIA_TYPE_VIDEO) {
type = "video";
@ -5773,7 +5822,7 @@ static int mov_write_header(AVFormatContext *s)
avio_flush(pb);
if (mov->flags & FF_MOV_FLAG_ISML)
mov_write_isml_manifest(pb, mov);
mov_write_isml_manifest(pb, mov, s);
if (mov->flags & FF_MOV_FLAG_EMPTY_MOOV &&
!(mov->flags & FF_MOV_FLAG_DELAY_MOOV)) {

2
libavformat/movenc.h
View File

@ -217,6 +217,8 @@ typedef struct MOVMuxContext {
int need_rewrite_extradata;
int use_stream_ids_as_track_ids;
int track_ids_ok;
} MOVMuxContext;
#define FF_MOV_FLAG_RTP_HINT (1 << 0)