Thu May 21, 2015 2:32 am
[Patch] HD stream selection in HTTP Live Streaming (HLS)
I am utilizing onlive live content in HLS where the manifest file contains multiple streams with different bandwiths (programs). (The url to a single stream can not be extracted by hand as far as I know from the current type of manifest, see example.) Serviio then defaults to the first video and audio streams it finds which isn't very flexible. In fact, it will probably be a "worst" approach always returning the streams with the lowest bandwith. A "best" approach would be returning the streams with the hightest assumed bandwith i.e. in HD-format. The following modification manages that;
In org.serviio.library.metadata.FFmpegMetadataRetriever
(Example manifest)
In org.serviio.library.metadata.FFmpegMetadataRetriever
- Code:
private static Map<String, Object> getParametersMap(List<String> ffmpegMediaDescription)
throws InvalidMediaFormatException
{
. . .
List<EmbeddedSubtitles> subtitlesList = new ArrayList();
String[] array = ffmpegMediaDescription.toArray(new String[ffmpegMediaDescription.size()]);
int i = 0;
while (i < array.length)
{
String line = array[i].trim();
int inputPos = line.indexOf("Input #0");
. . .
parameters.put("bitrate", bitrate);
}
}
}
}
else if (line.startsWith("Program"))
{
int j = i + 1;
while (j < array.length)
{
if (array[j].trim().startsWith("Program"))
{
i = j - 1;
break;
}
j++;
}
}
else if ((line.startsWith("Stream")) && (line.indexOf("Video:") > -1) && (parameters.get("video_codec") == null))
. . .
subtitlesList.add(new EmbeddedSubtitles((Integer)streamInfo.getValueA(), sCodec, (String)streamInfo.getValueB(), defaultLanguage));
}
}
}
i++;
}
parameters.put("embedded_subtitles", subtitlesList);
return parameters;
. . .
(Example manifest)
- Code:
#EXTM3U
#EXT-X-VERSION:3
#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID="subs",NAME="English",FORCED=NO,AUTOSELECT=YES,URI="subtitlelist_leng_b110000.m3u8",LANGUAGE="eng"
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=110000,RESOLUTION=320x180,SUBTITLES="subs"
chunklist_b110000.m3u8
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=64000,CODECS="mp4a.40.2",SUBTITLES="subs"
chunklist_b64000.m3u8
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=268000,RESOLUTION=320x180,SUBTITLES="subs"
chunklist_b268000.m3u8
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=668000,RESOLUTION=640x360,SUBTITLES="subs"
chunklist_b668000.m3u8
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=1000000,RESOLUTION=880x480,SUBTITLES="subs"
chunklist_b1000000.m3u8
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=1800000,RESOLUTION=1024x576,SUBTITLES="subs"
chunklist_b1800000.m3u8
