Question

有没有办法从视频（m3u8）文件中提取元数据，如果存在，请帮我链接或源代码。感谢

Answer 1

m3u8是m3u的utf8版本，而不是c1252 charset。

m3u是一个文本文件，作为播放列表文件，内容如下：

 #EXTM3U starts header and must be the first line

 #EXTINF for each playable file.

在此链接中，您可以查看样本：

http://schworak.com/programming/music/playlist_m3u.asp

和overview for generalistic HTTP Streaming Architecture。

Answer 2

下面的懒人的代码如下，详细的答案是here

private HashMap<String, Integer> parseHLSMetadata(InputStream i ){

        try {
            BufferedReader r = new BufferedReader(new InputStreamReader(i, "UTF-8"));
            String line;
            HashMap<String, Integer> segmentsMap = null;
            String digitRegex = "\\d+";
            Pattern p = Pattern.compile(digitRegex);

            while((line = r.readLine())!=null){
                if(line.equals("#EXTM3U")){ //start of m3u8
                    segmentsMap = new HashMap<String, Integer>();
                }else if(line.contains("#EXTINF")){ //once found EXTINFO use runner to get the next line which contains the media file, parse duration of the segment
                    Matcher matcher = p.matcher(line);
                    matcher.find(); //find the first matching digit, which represents the duration of the segment, dont call .find() again that will throw digit which may be contained in the description.
                    segmentsMap.put(r.readLine(), Integer.parseInt(matcher.group(0)));
                }
            }
            r.close();
            return segmentsMap;
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return null;
    }

干杯。

如何从视频（m3u8）文件中提取元数据？

2 个答案: