zotan/nginx-mod-rtmp
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fixed dash mp4 format & writer style

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This commit is contained in:
Roman Arutyunyan 2013-11-30 01:38:57 +04:00
parent 6e1008ee9c
commit 96e60a4ac0
3 changed files with 114 additions and 111 deletions
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57
dash/ngx_rtmp_dash_module.c
View file

@ -457,14 +457,13 @@ ngx_rtmp_dash_write_playlist(ngx_rtmp_session_t *s)
static ngx_int_t
ngx_rtmp_dash_write_init_segments(ngx_rtmp_session_t *s)
{
ngx_fd_t fd;
ngx_int_t rc;
ngx_buf_t b;
ngx_rtmp_dash_ctx_t *ctx;
ngx_rtmp_codec_ctx_t *codec_ctx;
ngx_rtmp_mp4_metadata_t metadata;
ngx_fd_t fd;
ngx_int_t rc;
ngx_buf_t b;
ngx_rtmp_dash_ctx_t *ctx;
ngx_rtmp_codec_ctx_t *codec_ctx;
static u_char buffer[NGX_RTMP_DASH_BUFSIZE];
static u_char buffer[NGX_RTMP_DASH_BUFSIZE];
ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_dash_module);
codec_ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_codec_module);
@ -473,9 +472,6 @@ ngx_rtmp_dash_write_init_segments(ngx_rtmp_session_t *s)
return NGX_ERROR;
}
metadata.width = codec_ctx->width;
metadata.height = codec_ctx->height;
/* init video */
*ngx_sprintf(ctx->stream.data + ctx->stream.len, "init.m4v") = 0;
@ -493,10 +489,9 @@ ngx_rtmp_dash_write_init_segments(ngx_rtmp_session_t *s)
b.end = b.start + sizeof(buffer);
b.pos = b.last = b.start;
metadata.video = 1;
ngx_rtmp_mp4_write_ftyp(&b, NGX_RTMP_MP4_FILETYPE_INIT, &metadata);
ngx_rtmp_mp4_write_moov(s, &b, &metadata);
ngx_rtmp_mp4_write_ftyp(&b, NGX_RTMP_MP4_FILETYPE_INIT,
NGX_RTMP_MP4_VIDEO_TRACK);
ngx_rtmp_mp4_write_moov(s, &b, NGX_RTMP_MP4_VIDEO_TRACK);
rc = ngx_write_fd(fd, b.start, (size_t) (b.last - b.start));
if (rc == NGX_ERROR) {
@ -521,10 +516,9 @@ ngx_rtmp_dash_write_init_segments(ngx_rtmp_session_t *s)
b.pos = b.last = b.start;
metadata.video = 0;
ngx_rtmp_mp4_write_ftyp(&b, NGX_RTMP_MP4_FILETYPE_INIT, &metadata);
ngx_rtmp_mp4_write_moov(s, &b, &metadata);
ngx_rtmp_mp4_write_ftyp(&b, NGX_RTMP_MP4_FILETYPE_INIT,
NGX_RTMP_MP4_AUDIO_TRACK);
ngx_rtmp_mp4_write_moov(s, &b, NGX_RTMP_MP4_AUDIO_TRACK);
rc = ngx_write_fd(fd, b.start, (size_t) (b.last - b.start));
if (rc == NGX_ERROR) {
@ -565,7 +559,9 @@ ngx_rtmp_dash_close_fragment(ngx_rtmp_session_t *s, ngx_rtmp_dash_track_t *t)
b.end = buffer + sizeof(buffer);
b.pos = b.last = b.start;
ngx_rtmp_mp4_write_ftyp(&b, NGX_RTMP_MP4_FILETYPE_SEG, NULL);
ngx_rtmp_mp4_write_ftyp(&b, NGX_RTMP_MP4_FILETYPE_SEG, t->type == 'v' ?
NGX_RTMP_MP4_VIDEO_TRACK :
NGX_RTMP_MP4_AUDIO_TRACK);
pos = b.last;
b.last += 44; /* leave room for sidx */
@ -1046,10 +1042,11 @@ static ngx_int_t
ngx_rtmp_dash_append(ngx_rtmp_session_t *s, ngx_chain_t *in,
ngx_rtmp_dash_track_t *t, ngx_int_t key, uint32_t timestamp, uint32_t delay)
{
u_char *p;
size_t size, bsize;
u_char *p;
size_t size, bsize;
ngx_rtmp_mp4_sample_t *smpl;
static u_char buffer[NGX_RTMP_DASH_BUFSIZE];
static u_char buffer[NGX_RTMP_DASH_BUFSIZE];
p = buffer;
size = 0;
@ -1081,15 +1078,17 @@ ngx_rtmp_dash_append(ngx_rtmp_session_t *s, ngx_chain_t *in,
return NGX_ERROR;
}
t->samples[t->sample_count].delay = delay;
t->samples[t->sample_count].size = (uint32_t) size;
t->samples[t->sample_count].duration = 0;
t->samples[t->sample_count].timestamp = timestamp;
t->samples[t->sample_count].key = (key ? 1 : 0);
smpl = &t->samples[t->sample_count];
smpl->delay = delay;
smpl->size = (uint32_t) size;
smpl->duration = 0;
smpl->timestamp = timestamp;
smpl->key = (key ? 1 : 0);
if (t->sample_count > 0) {
t->samples[t->sample_count - 1].duration = timestamp -
t->samples[t->sample_count - 1].timestamp;
smpl = &t->samples[t->sample_count - 1];
smpl->duration = timestamp - smpl->timestamp;
}
t->sample_count++;

141
dash/ngx_rtmp_mp4.c
View file

@ -183,12 +183,12 @@ ngx_rtmp_mp4_write_matrix(ngx_buf_t *buf, uint32_t a, uint32_t b, uint32_t c,
ngx_int_t
ngx_rtmp_mp4_write_ftyp(ngx_buf_t *b, int type,
ngx_rtmp_mp4_metadata_t *metadata)
ngx_rtmp_mp4_write_ftyp(ngx_buf_t *b, ngx_rtmp_mp4_file_type_t ftype,
ngx_rtmp_mp4_track_type_t ttype)
{
u_char *pos;
switch (type) {
switch (ftype) {
case NGX_RTMP_MP4_FILETYPE_INIT:
@ -197,7 +197,7 @@ ngx_rtmp_mp4_write_ftyp(ngx_buf_t *b, int type,
ngx_rtmp_mp4_box(b, "iso5");
ngx_rtmp_mp4_field_32(b, 1);
if (metadata != NULL && metadata->video) {
if (ttype == NGX_RTMP_MP4_VIDEO_TRACK) {
ngx_rtmp_mp4_box(b, "avc1");
}
@ -225,7 +225,7 @@ ngx_rtmp_mp4_write_ftyp(ngx_buf_t *b, int type,
static ngx_int_t
ngx_rtmp_mp4_write_mvhd(ngx_buf_t *b, ngx_rtmp_mp4_metadata_t *metadata)
ngx_rtmp_mp4_write_mvhd(ngx_buf_t *b)
{
u_char *pos;
@ -273,9 +273,13 @@ ngx_rtmp_mp4_write_mvhd(ngx_buf_t *b, ngx_rtmp_mp4_metadata_t *metadata)
static ngx_int_t
ngx_rtmp_mp4_write_tkhd(ngx_buf_t *b, ngx_rtmp_mp4_metadata_t *metadata)
ngx_rtmp_mp4_write_tkhd(ngx_rtmp_session_t *s, ngx_buf_t *b,
ngx_rtmp_mp4_track_type_t ttype)
{
u_char *pos;
u_char *pos;
ngx_rtmp_codec_ctx_t *codec_ctx;
codec_ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_codec_module);
pos = ngx_rtmp_mp4_start_box(b, "tkhd");
@ -306,16 +310,16 @@ ngx_rtmp_mp4_write_tkhd(ngx_buf_t *b, ngx_rtmp_mp4_metadata_t *metadata)
ngx_rtmp_mp4_field_32(b, 0);
/* reserved */
ngx_rtmp_mp4_field_16(b, metadata->video ? 0 : 0x0100);
ngx_rtmp_mp4_field_16(b, ttype == NGX_RTMP_MP4_VIDEO_TRACK ? 0 : 0x0100);
/* reserved */
ngx_rtmp_mp4_field_16(b, 0);
ngx_rtmp_mp4_write_matrix(b, 1, 0, 0, 1, 0, 0);
if (metadata->video) {
ngx_rtmp_mp4_field_32(b, (uint32_t) metadata->width << 16);
ngx_rtmp_mp4_field_32(b, (uint32_t) metadata->height << 16);
if (ttype == NGX_RTMP_MP4_VIDEO_TRACK) {
ngx_rtmp_mp4_field_32(b, (uint32_t) codec_ctx->width << 16);
ngx_rtmp_mp4_field_32(b, (uint32_t) codec_ctx->height << 16);
} else {
ngx_rtmp_mp4_field_32(b, 0);
ngx_rtmp_mp4_field_32(b, 0);
@ -362,7 +366,7 @@ ngx_rtmp_mp4_write_mdhd(ngx_buf_t *b)
static ngx_int_t
ngx_rtmp_mp4_write_hdlr(ngx_buf_t *b, ngx_rtmp_mp4_metadata_t *metadata)
ngx_rtmp_mp4_write_hdlr(ngx_buf_t *b, ngx_rtmp_mp4_track_type_t ttype)
{
u_char *pos;
@ -374,7 +378,7 @@ ngx_rtmp_mp4_write_hdlr(ngx_buf_t *b, ngx_rtmp_mp4_metadata_t *metadata)
/* pre defined */
ngx_rtmp_mp4_field_32(b, 0);
if (metadata->video) {
if (ttype == NGX_RTMP_MP4_VIDEO_TRACK) {
ngx_rtmp_mp4_box(b, "vide");
} else {
ngx_rtmp_mp4_box(b, "soun");
@ -385,11 +389,10 @@ ngx_rtmp_mp4_write_hdlr(ngx_buf_t *b, ngx_rtmp_mp4_metadata_t *metadata)
ngx_rtmp_mp4_field_32(b, 0);
ngx_rtmp_mp4_field_32(b, 0);
if (metadata->video) {
if (ttype == NGX_RTMP_MP4_VIDEO_TRACK) {
/* video handler string, NULL-terminated */
ngx_rtmp_mp4_data(b, "VideoHandler", sizeof("VideoHandler"));
}
else {
} else {
/* sound handler string, NULL-terminated */
ngx_rtmp_mp4_data(b, "SoundHandler", sizeof("SoundHandler"));
}
@ -439,7 +442,7 @@ ngx_rtmp_mp4_write_smhd(ngx_buf_t *b)
static ngx_int_t
ngx_rtmp_mp4_write_dref(ngx_buf_t *b, ngx_rtmp_mp4_metadata_t *metadata)
ngx_rtmp_mp4_write_dref(ngx_buf_t *b)
{
u_char *pos;
@ -466,13 +469,13 @@ ngx_rtmp_mp4_write_dref(ngx_buf_t *b, ngx_rtmp_mp4_metadata_t *metadata)
static ngx_int_t
ngx_rtmp_mp4_write_dinf(ngx_buf_t *b, ngx_rtmp_mp4_metadata_t *metadata)
ngx_rtmp_mp4_write_dinf(ngx_buf_t *b)
{
u_char *pos;
pos = ngx_rtmp_mp4_start_box(b, "dinf");
ngx_rtmp_mp4_write_dref(b, metadata);
ngx_rtmp_mp4_write_dref(b);
ngx_rtmp_mp4_update_box_size(b, pos);
@ -481,8 +484,7 @@ ngx_rtmp_mp4_write_dinf(ngx_buf_t *b, ngx_rtmp_mp4_metadata_t *metadata)
static ngx_int_t
ngx_rtmp_mp4_write_avcc(ngx_rtmp_session_t *s, ngx_buf_t *b,
ngx_rtmp_mp4_metadata_t *metadata)
ngx_rtmp_mp4_write_avcc(ngx_rtmp_session_t *s, ngx_buf_t *b)
{
u_char *pos, *p;
ngx_chain_t *in;
@ -524,10 +526,12 @@ ngx_rtmp_mp4_write_avcc(ngx_rtmp_session_t *s, ngx_buf_t *b,
static ngx_int_t
ngx_rtmp_mp4_write_video(ngx_rtmp_session_t *s, ngx_buf_t *b,
ngx_rtmp_mp4_metadata_t *metadata)
ngx_rtmp_mp4_write_video(ngx_rtmp_session_t *s, ngx_buf_t *b)
{
u_char *pos;
u_char *pos;
ngx_rtmp_codec_ctx_t *codec_ctx;
codec_ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_codec_module);
pos = ngx_rtmp_mp4_start_box(b, "avc1");
@ -548,8 +552,8 @@ ngx_rtmp_mp4_write_video(ngx_rtmp_session_t *s, ngx_buf_t *b,
ngx_rtmp_mp4_field_32(b, 0);
/* width & height */
ngx_rtmp_mp4_field_16(b, (uint16_t) metadata->width);
ngx_rtmp_mp4_field_16(b, (uint16_t) metadata->height);
ngx_rtmp_mp4_field_16(b, (uint16_t) codec_ctx->width);
ngx_rtmp_mp4_field_16(b, (uint16_t) codec_ctx->height);
/* horizontal & vertical resolutions 72 dpi */
ngx_rtmp_mp4_field_32(b, 0x00480000);
@ -575,7 +579,7 @@ ngx_rtmp_mp4_write_video(ngx_rtmp_session_t *s, ngx_buf_t *b,
ngx_rtmp_mp4_field_16(b, 0x18);
ngx_rtmp_mp4_field_16(b, 0xffff);
ngx_rtmp_mp4_write_avcc(s, b, metadata);
ngx_rtmp_mp4_write_avcc(s, b);
ngx_rtmp_mp4_update_box_size(b, pos);
@ -584,8 +588,7 @@ ngx_rtmp_mp4_write_video(ngx_rtmp_session_t *s, ngx_buf_t *b,
static ngx_int_t
ngx_rtmp_mp4_write_esds(ngx_rtmp_session_t *s, ngx_buf_t *b,
ngx_rtmp_mp4_metadata_t *metadata)
ngx_rtmp_mp4_write_esds(ngx_rtmp_session_t *s, ngx_buf_t *b)
{
size_t dsi_len;
u_char *pos, *dsi;
@ -665,10 +668,12 @@ ngx_rtmp_mp4_write_esds(ngx_rtmp_session_t *s, ngx_buf_t *b,
static ngx_int_t
ngx_rtmp_mp4_write_audio(ngx_rtmp_session_t *s, ngx_buf_t *b,
ngx_rtmp_mp4_metadata_t *metadata)
ngx_rtmp_mp4_write_audio(ngx_rtmp_session_t *s, ngx_buf_t *b)
{
u_char *pos;
u_char *pos;
ngx_rtmp_codec_ctx_t *codec_ctx;
codec_ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_codec_module);
pos = ngx_rtmp_mp4_start_box(b, "mp4a");
@ -683,11 +688,11 @@ ngx_rtmp_mp4_write_audio(ngx_rtmp_session_t *s, ngx_buf_t *b,
ngx_rtmp_mp4_field_32(b, 0);
ngx_rtmp_mp4_field_32(b, 0);
/* reserved = 2*/
ngx_rtmp_mp4_field_16(b, 2);
/* channel count */
ngx_rtmp_mp4_field_16(b, (uint16_t) codec_ctx->audio_channels);
/* reserved = 16 */
ngx_rtmp_mp4_field_16(b, 16);
/* sample size */
ngx_rtmp_mp4_field_16(b, (uint16_t) (codec_ctx->sample_size * 8));
/* reserved */
ngx_rtmp_mp4_field_32(b, 0);
@ -695,17 +700,17 @@ ngx_rtmp_mp4_write_audio(ngx_rtmp_session_t *s, ngx_buf_t *b,
/* time scale */
ngx_rtmp_mp4_field_16(b, 1000);
/* reserved */
ngx_rtmp_mp4_field_16(b, 0);
ngx_rtmp_mp4_write_esds(s, b, metadata);
/* sample rate */
ngx_rtmp_mp4_field_16(b, (uint16_t) codec_ctx->sample_rate);
ngx_rtmp_mp4_write_esds(s, b);
#if 0
/* tag size*/
ngx_rtmp_mp4_field_32(b, 8);
/* null tag */
ngx_rtmp_mp4_field_32(b, 0);
#endif
ngx_rtmp_mp4_update_box_size(b, pos);
return NGX_OK;
@ -713,8 +718,8 @@ ngx_rtmp_mp4_write_audio(ngx_rtmp_session_t *s, ngx_buf_t *b,
static ngx_int_t
ngx_rtmp_mp4_write_stsd(ngx_rtmp_session_t *s, ngx_buf_t *b,
ngx_rtmp_mp4_metadata_t *metadata)
ngx_rtmp_mp4_write_stsd(ngx_rtmp_session_t *s, ngx_buf_t *b,
ngx_rtmp_mp4_track_type_t ttype)
{
u_char *pos;
@ -726,10 +731,10 @@ ngx_rtmp_mp4_write_stsd(ngx_rtmp_session_t *s, ngx_buf_t *b,
/* entry count */
ngx_rtmp_mp4_field_32(b, 1);
if (metadata->video) {
ngx_rtmp_mp4_write_video(s, b, metadata);
if (ttype == NGX_RTMP_MP4_VIDEO_TRACK) {
ngx_rtmp_mp4_write_video(s, b);
} else {
ngx_rtmp_mp4_write_audio(s, b, metadata);
ngx_rtmp_mp4_write_audio(s, b);
}
ngx_rtmp_mp4_update_box_size(b, pos);
@ -804,14 +809,14 @@ ngx_rtmp_mp4_write_stco(ngx_buf_t *b)
static ngx_int_t
ngx_rtmp_mp4_write_stbl(ngx_rtmp_session_t *s, ngx_buf_t *b,
ngx_rtmp_mp4_metadata_t *metadata)
ngx_rtmp_mp4_write_stbl(ngx_rtmp_session_t *s, ngx_buf_t *b,
ngx_rtmp_mp4_track_type_t ttype)
{
u_char *pos;
pos = ngx_rtmp_mp4_start_box(b, "stbl");
ngx_rtmp_mp4_write_stsd(s, b, metadata);
ngx_rtmp_mp4_write_stsd(s, b, ttype);
ngx_rtmp_mp4_write_stts(b);
ngx_rtmp_mp4_write_stsc(b);
ngx_rtmp_mp4_write_stsz(b);
@ -824,21 +829,21 @@ ngx_rtmp_mp4_write_stbl(ngx_rtmp_session_t *s, ngx_buf_t *b,
static ngx_int_t
ngx_rtmp_mp4_write_minf(ngx_rtmp_session_t *s, ngx_buf_t *b,
ngx_rtmp_mp4_metadata_t *metadata)
ngx_rtmp_mp4_write_minf(ngx_rtmp_session_t *s, ngx_buf_t *b,
ngx_rtmp_mp4_track_type_t ttype)
{
u_char *pos;
pos = ngx_rtmp_mp4_start_box(b, "minf");
if (metadata->video) {
if (ttype == NGX_RTMP_MP4_VIDEO_TRACK) {
ngx_rtmp_mp4_write_vmhd(b);
} else {
ngx_rtmp_mp4_write_smhd(b);
}
ngx_rtmp_mp4_write_dinf(b, metadata);
ngx_rtmp_mp4_write_stbl(s, b, metadata);
ngx_rtmp_mp4_write_dinf(b);
ngx_rtmp_mp4_write_stbl(s, b, ttype);
ngx_rtmp_mp4_update_box_size(b, pos);
@ -847,16 +852,16 @@ ngx_rtmp_mp4_write_minf(ngx_rtmp_session_t *s, ngx_buf_t *b,
static ngx_int_t
ngx_rtmp_mp4_write_mdia(ngx_rtmp_session_t *s, ngx_buf_t *b,
ngx_rtmp_mp4_metadata_t *metadata)
ngx_rtmp_mp4_write_mdia(ngx_rtmp_session_t *s, ngx_buf_t *b,
ngx_rtmp_mp4_track_type_t ttype)
{
u_char *pos;
pos = ngx_rtmp_mp4_start_box(b, "mdia");
ngx_rtmp_mp4_write_mdhd(b);
ngx_rtmp_mp4_write_hdlr(b, metadata);
ngx_rtmp_mp4_write_minf(s, b, metadata);
ngx_rtmp_mp4_write_hdlr(b, ttype);
ngx_rtmp_mp4_write_minf(s, b, ttype);
ngx_rtmp_mp4_update_box_size(b, pos);
@ -864,15 +869,15 @@ ngx_rtmp_mp4_write_mdia(ngx_rtmp_session_t *s, ngx_buf_t *b,
}
static ngx_int_t
ngx_rtmp_mp4_write_trak(ngx_rtmp_session_t *s, ngx_buf_t *b,
ngx_rtmp_mp4_metadata_t *metadata)
ngx_rtmp_mp4_write_trak(ngx_rtmp_session_t *s, ngx_buf_t *b,
ngx_rtmp_mp4_track_type_t ttype)
{
u_char *pos;
pos = ngx_rtmp_mp4_start_box(b, "trak");
ngx_rtmp_mp4_write_tkhd(b, metadata);
ngx_rtmp_mp4_write_mdia(s, b, metadata);
ngx_rtmp_mp4_write_tkhd(s, b, ttype);
ngx_rtmp_mp4_write_mdia(s, b, ttype);
ngx_rtmp_mp4_update_box_size(b, pos);
@ -881,7 +886,7 @@ ngx_rtmp_mp4_write_trak(ngx_rtmp_session_t *s, ngx_buf_t *b,
static ngx_int_t
ngx_rtmp_mp4_write_mvex(ngx_buf_t *b, ngx_rtmp_mp4_metadata_t *metadata)
ngx_rtmp_mp4_write_mvex(ngx_buf_t *b)
{
u_char *pos;
@ -916,16 +921,16 @@ ngx_rtmp_mp4_write_mvex(ngx_buf_t *b, ngx_rtmp_mp4_metadata_t *metadata)
ngx_int_t
ngx_rtmp_mp4_write_moov(ngx_rtmp_session_t *s, ngx_buf_t *b,
ngx_rtmp_mp4_metadata_t *metadata)
ngx_rtmp_mp4_write_moov(ngx_rtmp_session_t *s, ngx_buf_t *b,
ngx_rtmp_mp4_track_type_t ttype)
{
u_char *pos;
pos = ngx_rtmp_mp4_start_box(b, "moov");
ngx_rtmp_mp4_write_mvhd(b, metadata);
ngx_rtmp_mp4_write_mvex(b, metadata);
ngx_rtmp_mp4_write_trak(s, b, metadata);
ngx_rtmp_mp4_write_mvhd(b);
ngx_rtmp_mp4_write_mvex(b);
ngx_rtmp_mp4_write_trak(s, b, ttype);
ngx_rtmp_mp4_update_box_size(b, pos);

27
dash/ngx_rtmp_mp4.h
View file

@ -24,23 +24,22 @@ typedef struct {
} ngx_rtmp_mp4_sample_t;
typedef struct {
ngx_uint_t width;
ngx_uint_t height;
ngx_uint_t video;
} ngx_rtmp_mp4_metadata_t;
enum {
NGX_RTMP_MP4_FILETYPE_INIT = 0,
typedef enum {
NGX_RTMP_MP4_FILETYPE_INIT,
NGX_RTMP_MP4_FILETYPE_SEG
};
} ngx_rtmp_mp4_file_type_t;
ngx_int_t ngx_rtmp_mp4_write_ftyp(ngx_buf_t *b, int type,
ngx_rtmp_mp4_metadata_t *metadata);
ngx_int_t ngx_rtmp_mp4_write_moov(ngx_rtmp_session_t *s, ngx_buf_t *b,
ngx_rtmp_mp4_metadata_t *metadata);
typedef enum {
NGX_RTMP_MP4_VIDEO_TRACK,
NGX_RTMP_MP4_AUDIO_TRACK
} ngx_rtmp_mp4_track_type_t;
ngx_int_t ngx_rtmp_mp4_write_ftyp(ngx_buf_t *b, ngx_rtmp_mp4_file_type_t ftype,
ngx_rtmp_mp4_track_type_t ttype);
ngx_int_t ngx_rtmp_mp4_write_moov(ngx_rtmp_session_t *s, ngx_buf_t *b,
ngx_rtmp_mp4_track_type_t ttype);
ngx_int_t ngx_rtmp_mp4_write_moof(ngx_buf_t *b, uint32_t earliest_pres_time,
uint32_t sample_count, ngx_rtmp_mp4_sample_t *samples,
ngx_uint_t sample_mask, uint32_t index);