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avformat/hlsenc: add var_stream_map DEFAULT field status parameter

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use a:0,agroup:aud_low,default:Yes a:1,agroup:aud_low,
    a:2,agroup:aud_high,default:Yes a:3, agroup:aud_high,
    v:0,agroup:aud_low v:1,agroup:aud_high
    create master m3u8 list.

result:
EXTM3U
EXT-X-VERSION:3
EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="group_aud_low",NAME="audio_0",DEFAULT=YES,URI="out_0.m3u8"
EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="group_aud_low",NAME="audio_1",DEFAULT=NO,URI="out_1.m3u8"
EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="group_aud_high",NAME="audio_2",DEFAULT=YES,URI="out_2.m3u8"
EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="group_aud_high",NAME="audio_3",DEFAULT=NO,URI="out_3.m3u8"
EXT-X-STREAM-INF:BANDWIDTH=1170400,RESOLUTION=640x480,CODECS="avc1.64001e,mp4a.40.2",AUDIO="group_aud_low"
out_4.m3u8
EXT-X-STREAM-INF:BANDWIDTH=3440800,RESOLUTION=640x480,CODECS="avc1.64001e,mp4a.40.2",AUDIO="group_aud_high"
out_5.m3u8

Signed-off-by: Steven Liu <lq@chinaffmpeg.org>
This commit is contained in:
Steven Liu 2019-01-23 18:52:02 +08:00
parent 62e8644bca
commit 6a25bb5aa4
2 changed files with 39 additions and 5 deletions
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15
doc/muxers.texi
View File

@ -967,6 +967,21 @@ and they are mapped to the two video only variant streams with audio group names
By default, a single hls variant containing all the encoded streams is created.
@example
ffmpeg -re -i in.ts -b:a:0 32k -b:a:1 64k -b:v:0 1000k \
-map 0:a -map 0:a -map 0:v -f hls \
-var_stream_map "a:0,agroup:aud_low,default:yes a:1,agroup:aud_low v:0,agroup:aud_low" \
-master_pl_name master.m3u8 \
http://example.com/live/out_%v.m3u8
@end example
This example creates two audio only and one video only variant streams. In
addition to the #EXT-X-STREAM-INF tag for each variant stream in the master
playlist, #EXT-X-MEDIA tag is also added for the two audio only variant streams
and they are mapped to the one video only variant streams with audio group name
'aud_low', and the audio group have default stat is NO or YES.
By default, a single hls variant containing all the encoded streams is created.
@item cc_stream_map
Map string which specifies different closed captions groups and their
attributes. The closed captions stream groups are separated by space.

29
libavformat/hlsenc.c
View File

@ -153,6 +153,7 @@ typedef struct VariantStream {
CodecAttributeStatus attr_status;
unsigned int nb_streams;
int m3u8_created; /* status of media play-list creation */
int is_default; /* default status of audio group */
char *agroup; /* audio group name */
char *ccgroup; /* closed caption group name */
char *baseurl;
@ -228,6 +229,8 @@ typedef struct HLSContext {
AVIOContext *sub_m3u8_out;
int64_t timeout;
int ignore_io_errors;
int has_default_key; /* has DEFAULT field of var_stream_map */
int has_video_m3u8; /* has video stream m3u8 list */
} HLSContext;
static int hlsenc_io_open(AVFormatContext *s, AVIOContext **pb, char *filename,
@ -1258,7 +1261,7 @@ static int create_master_playlist(AVFormatContext *s,
goto fail;
}
ff_hls_write_audio_rendition(hls->m3u8_out, vs->agroup, m3u8_rel_name, i, 1);
ff_hls_write_audio_rendition(hls->m3u8_out, vs->agroup, m3u8_rel_name, i, hls->has_default_key ? vs->is_default : 1);
av_freep(&m3u8_rel_name);
}
@ -1336,8 +1339,15 @@ static int create_master_playlist(AVFormatContext *s,
vs->ccgroup);
}
ff_hls_write_stream_info(vid_st, hls->m3u8_out, bandwidth, m3u8_rel_name,
aud_st ? vs->agroup : NULL, vs->codec_attr, ccgroup);
if (!hls->has_default_key || !hls->has_video_m3u8) {
ff_hls_write_stream_info(vid_st, hls->m3u8_out, bandwidth, m3u8_rel_name,
aud_st ? vs->agroup : NULL, vs->codec_attr, ccgroup);
} else {
if (vid_st) {
ff_hls_write_stream_info(vid_st, hls->m3u8_out, bandwidth, m3u8_rel_name,
aud_st ? vs->agroup : NULL, vs->codec_attr, ccgroup);
}
}
av_freep(&m3u8_rel_name);
}
@ -1819,7 +1829,7 @@ static int parse_variant_stream_mapstring(AVFormatContext *s)
/**
* Expected format for var_stream_map string is as below:
* "a:0,v:0 a:1,v:1"
* "a:0,agroup:a0 a:1,agroup:a1 v:0,agroup:a0 v:1,agroup:a1"
* "a:0,agroup:a0,default:1 a:1,agroup:a1,defalut:0 v:0,agroup:a0 v:1,agroup:a1"
* This string specifies how to group the audio, video and subtitle streams
* into different variant streams. The variant stream groups are separated
* by space.
@ -1850,6 +1860,7 @@ static int parse_variant_stream_mapstring(AVFormatContext *s)
if (nb_varstreams < hls->nb_varstreams) {
vs = &(hls->var_streams[nb_varstreams]);
vs->var_stream_idx = nb_varstreams;
vs->is_default = 0;
nb_varstreams++;
} else
return AVERROR(EINVAL);
@ -1869,7 +1880,12 @@ static int parse_variant_stream_mapstring(AVFormatContext *s)
while (keyval = av_strtok(varstr, ",", &saveptr2)) {
varstr = NULL;
if (av_strstart(keyval, "agroup:", &val)) {
if (av_strstart(keyval, "default:", &val)) {
vs->is_default = (!av_strncasecmp(val, "YES", strlen("YES")) ||
(!av_strncasecmp(val, "1", strlen("1"))));
hls->has_default_key = 1;
continue;
} else if (av_strstart(keyval, "agroup:", &val)) {
vs->agroup = av_strdup(val);
if (!vs->agroup)
return AVERROR(ENOMEM);
@ -1881,6 +1897,7 @@ static int parse_variant_stream_mapstring(AVFormatContext *s)
continue;
} else if (av_strstart(keyval, "v:", &val)) {
codec_type = AVMEDIA_TYPE_VIDEO;
hls->has_video_m3u8 = 1;
} else if (av_strstart(keyval, "a:", &val)) {
codec_type = AVMEDIA_TYPE_AUDIO;
} else if (av_strstart(keyval, "s:", &val)) {
@ -2519,6 +2536,8 @@ static int hls_init(AVFormatContext *s)
int vtt_basename_size = 0;
int fmp4_init_filename_len = strlen(hls->fmp4_init_filename) + 1;
hls->has_default_key = 0;
hls->has_video_m3u8 = 0;
ret = update_variant_stream_info(s);
if (ret < 0) {
av_log(s, AV_LOG_ERROR, "Variant stream info update failed with status %x\n",