HLS Adaptative Bitrate (VOD HLS)

[leleobhz]

Hello,

Its possible to deploy with this module the HLS Adaptative Bitrate with automatic m3u8 generation?

Eg.;

#EXTM3U
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=1280000
http://example.com/low.m3u8
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=2560000
http://example.com/mid.m3u8
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=7680000
http://example.com/hi.m3u8
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=65000,CODECS="mp4a.40.5"
http://example.com/audio-only.m3u8

Thanks!

[chriswiggins]

Yes it is. See the HLS section in the wiki for the hls_variant information :-)

On 28/06/2016, at 1:49 AM, Leonardo Amaral notifications@github.com<mailto:notifications@github.com> wrote:

Hello,

Its possible to deploy with this module the HLS Adaptative Bitrate with automatic m3u8 generation?

Eg.;

EXTM3U

EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=1280000

http://example.com/low.m3u8

EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=2560000

http://example.com/mid.m3u8

EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=7680000

http://example.com/hi.m3u8

EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=65000,CODECS="mp4a.40.5"

http://example.com/audio-only.m3u8

Thanks!

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[leleobhz]

Hello!

Yes it is. See the HLS section in the wiki for the hls_variant information :-)

I did the following configuration in my server:

        application bb07 {
                access_log /var/log/nginx/rtmp/access_log_bb07;
                live on;
#               meta on;
#               publish_notify on;
#               drop_idle_publisher 10s;
#               play_restart on;
#               idle_streams off;

                hls on;
                hls_nested on;
                hls_path /tmp/bb07/hls;
                hls_playlist_length 120s;
                hls_continuous on;
                hls_fragment_naming system;
                hls_sync 100ms;

                dash on;
                dash_nested on;
                dash_playlist_length 120s;
                dash_path /tmp/bb07/dash;

                hls_variant _low BANDWIDTH=288000; # Low bitrate, sub-SD resolution
                hls_variant _mid BANDWIDTH=448000; # Medium bitrate, SD resolution
                hls_variant _high BANDWIDTH=1152000; # High bitrate, higher-than-SD resolution
                hls_variant _hd720 BANDWIDTH=2048000; # High bitrate, HD 720p resolution
                hls_variant _src BANDWIDTH=4096000; # Source bitrate, source resolution
        }

but /tmp/bb07/hls is like the following:

root@vSRV01:/tmp# tree /tmp/bb07/
/tmp/bb07/
├── dash
│   ├── bb07
│   │   ├── 0.m4a
│   │   ├── 0.m4v
│   │   ├── 6125.m4a
│   │   ├── 6125.m4v
│   │   ├── index.mpd
│   │   ├── init.m4a
│   │   ├── init.m4v
│   │   ├── raw.m4a
│   │   └── raw.m4v
│   ├── bb07_hd720
│   │   ├── 0.m4a
│   │   ├── 0.m4v
│   │   ├── index.mpd
│   │   ├── init.m4a
│   │   ├── init.m4v
│   │   ├── raw.m4a
│   │   └── raw.m4v
│   ├── bb07_high
│   │   ├── 0.m4a
│   │   ├── 0.m4v
│   │   ├── index.mpd
│   │   ├── init.m4a
│   │   ├── init.m4v
│   │   ├── raw.m4a
│   │   └── raw.m4v
│   ├── bb07_low
│   │   ├── 0.m4a
│   │   ├── 0.m4v
│   │   ├── index.mpd
│   │   ├── init.m4a
│   │   ├── init.m4v
│   │   ├── raw.m4a
│   │   └── raw.m4v
│   └── bb07_mid
│       ├── 0.m4a
│       ├── 0.m4v
│       ├── index.mpd
│       ├── init.m4a
│       ├── init.m4v
│       ├── raw.m4a
│       └── raw.m4v
└── hls
    ├── bb07
    │   ├── 1467043030523.ts
    │   ├── 1467043036374.ts
    │   ├── 1467043047810.ts
    │   └── index.m3u8
    ├── bb07_hd720
    │   ├── 1467043030685.ts
    │   ├── 1467043040318.ts
    │   └── index.m3u8
    ├── bb07_high
    │   ├── 1467043030655.ts
    │   ├── 1467043040294.ts
    │   └── index.m3u8
    ├── bb07_low
    │   ├── 1467043030616.ts
    │   ├── 1467043040267.ts
    │   └── index.m3u8
    ├── bb07.m3u8
    └── bb07_mid
        ├── 1467043030628.ts
        ├── 1467043040278.ts
        └── index.m3u8

12 directories, 54 files

For HLS is working (The nginx server could not create the file for permissions issues) but dash does not export the multi bitrate. What is needed to make dash also suport adaptative in the mpd?

Also, I see hls_variant need to specify bandwidth. This can be filled automatically based on stream bitrate?

Thanks!

[chriswiggins]

DASH doesn't have variable bitrate support yet as far as I know so it wont work for that.

I will look into being able to determine HLS bitrates automatically