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avformat/hlsenc: add var_stream_map LANGUAGE field string parameter

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use a:0,agroup:aud_low,default:Yes,language:CHN a:1,agroup:aud_low,language:ENG
        a:2,agroup:aud_high,default:YesYes,language:CHN a:3,agroup:aud_high,language:ENG
        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,LANGUAGE="CHN",URI="out_0.m3u8"
EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="group_aud_low",NAME="audio_1",DEFAULT=NO,LANGUAGE="ENG",URI="out_1.m3u8"
EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="group_aud_high",NAME="audio_2",DEFAULT=YES,LANGUAGE="CHN",URI="out_2.m3u8"
EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="group_aud_high",NAME="audio_3",DEFAULT=NO,LANGUAGE="ENG",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 19:19:49 +08:00
parent 6a25bb5aa4
commit 1e03d60054
5 changed files with 35 additions and 9 deletions
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16
doc/muxers.texi
View File

@ -982,6 +982,22 @@ and they are mapped to the one video only variant streams with audio group name
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,language=ENG a:1,agroup:aud_low,language:CHN 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, and one audio
have and language is named ENG, the other audio language is named CHN.
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.

2
libavformat/dashenc.c
View File

@ -998,7 +998,7 @@ static int write_manifest(AVFormatContext *s, int final)
continue;
get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
ff_hls_write_audio_rendition(c->m3u8_out, (char *)audio_group,
playlist_file, i, is_default);
playlist_file, NULL, i, is_default);
max_audio_bitrate = FFMAX(st->codecpar->bit_rate +
os->muxer_overhead, max_audio_bitrate);
if (!av_strnstr(audio_codec_str, os->codec_str, sizeof(audio_codec_str))) {

15
libavformat/hlsenc.c
View File

@ -154,6 +154,7 @@ typedef struct VariantStream {
unsigned int nb_streams;
int m3u8_created; /* status of media play-list creation */
int is_default; /* default status of audio group */
char *language; /* audio lauguage name */
char *agroup; /* audio group name */
char *ccgroup; /* closed caption group name */
char *baseurl;
@ -1261,7 +1262,7 @@ static int create_master_playlist(AVFormatContext *s,
goto fail;
}
ff_hls_write_audio_rendition(hls->m3u8_out, vs->agroup, m3u8_rel_name, i, hls->has_default_key ? vs->is_default : 1);
ff_hls_write_audio_rendition(hls->m3u8_out, vs->agroup, m3u8_rel_name, vs->language, i, hls->has_default_key ? vs->is_default : 1);
av_freep(&m3u8_rel_name);
}
@ -1829,7 +1830,7 @@ 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,default:1 a:1,agroup:a1,defalut:0 v:0,agroup:a0 v:1,agroup:a1"
* "a:0,agroup:a0,default:1,language:ENG 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.
@ -1879,8 +1880,12 @@ static int parse_variant_stream_mapstring(AVFormatContext *s)
nb_streams = 0;
while (keyval = av_strtok(varstr, ",", &saveptr2)) {
varstr = NULL;
if (av_strstart(keyval, "default:", &val)) {
if (av_strstart(keyval, "language:", &val)) {
vs->language = av_strdup(val);
if (!vs->language)
return AVERROR(ENOMEM);
continue;
} else 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;
@ -2392,6 +2397,7 @@ static void hls_free_variant_streams(struct HLSContext *hls)
av_freep(&vs->m3u8_name);
av_freep(&vs->streams);
av_freep(&vs->agroup);
av_freep(&vs->language);
av_freep(&vs->ccgroup);
av_freep(&vs->baseurl);
}
@ -2843,6 +2849,7 @@ fail:
av_freep(&vs->m3u8_name);
av_freep(&vs->vtt_m3u8_name);
av_freep(&vs->streams);
av_freep(&vs->language);
av_freep(&vs->agroup);
av_freep(&vs->ccgroup);
av_freep(&vs->baseurl);

9
libavformat/hlsplaylist.c
View File

@ -36,13 +36,16 @@ void ff_hls_write_playlist_version(AVIOContext *out, int version) {
}
void ff_hls_write_audio_rendition(AVIOContext *out, char *agroup,
char *filename, int name_id, int is_default) {
char *filename, char *language, int name_id, int is_default) {
if (!out || !agroup || !filename)
return;
avio_printf(out, "#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID=\"group_%s\"", agroup);
avio_printf(out, ",NAME=\"audio_%d\",DEFAULT=%s,URI=\"%s\"\n", name_id,
is_default ? "YES" : "NO", filename);
avio_printf(out, ",NAME=\"audio_%d\",DEFAULT=%s,", name_id, is_default ? "YES" : "NO");
if (language) {
avio_printf(out, "LANGUAGE=\"%s\",", language);
}
avio_printf(out, "URI=\"%s\"\n", filename);
}
void ff_hls_write_stream_info(AVStream *st, AVIOContext *out,

2
libavformat/hlsplaylist.h
View File

@ -38,7 +38,7 @@ typedef enum {
void ff_hls_write_playlist_version(AVIOContext *out, int version);
void ff_hls_write_audio_rendition(AVIOContext *out, char *agroup,
char *filename, int name_id, int is_default);
char *filename, char *language, int name_id, int is_default);
void ff_hls_write_stream_info(AVStream *st, AVIOContext *out,
int bandwidth, char *filename, char *agroup,
char *codecs, char *ccgroup);