#11378: ffmpeg can't detect nested m3u8 for subtitles
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Reporter: ffvii | Type: enhancement
Status: new | Priority: wish
Component: ffmpeg | Version: unspecified
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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When I try to download an m3u8 with ffmpeg, if there's a subtitle track
that's also an m3u8 uri (which points to the actual vtt uri), ffmpeg shows
that it can't support the subtitle.
Here's an example (with masked uri):
Trying to download with ffmpeg -i
"https://xxxx.com/api_v2/getm3u8.jsp?resourceId=xxxx";, which is an m3u8
like:
{{{
#EXTM3U
#EXT-X-VERSION:6
#EXT-X-INDEPENDENT-SEGMENTS
#EXT-X-MEDIA:TYPE=SUBTITLES,URI="https://xxxx.com:443/api_v2/getm3u8.jsp;jsessionid=null?programGuid=xxxx&bitrate=adaptive&playlist=subtitles_en
",GROUP-
ID="subtitles",LANGUAGE="en",NAME="English",DEFAULT=NO,AUTOSELECT=YES
#EXT-X-MEDIA:TYPE=AUDIO,URI="https://xxxx.com:443/api_v2/getm3u8.jsp;jsessionid=null?programGuid=xxxx&bitrate=adaptive&playlist=stereo_en
",GROUP-
ID="stereo",LANGUAGE="en",NAME="English",DEFAULT=YES,AUTOSELECT=YES,CHANNELS="2"
#EXT-X-STREAM-INF:BANDWIDTH=7361028,AVERAGE-
BANDWIDTH=3305533,CODECS="avc1.4d4029,mp4a.40.2",RESOLUTION=1920x804
,FRAME-RATE=23.98,AUDIO="stereo",SUBTITLES="subtitles",CLOSED-
CAPTIONS=NONE,VIDEO-RANGE=SDR
https://xxxx.com:443/api_v2/getm3u8.jsp;jsessionid=null?programGuid=xxxx&bitrate=adaptive&playlist=1920x804
#EXT-X-I-FRAME-STREAM-
INF:URI="https://xxxx.com:443/api_v2/getm3u8.jsp;jsessionid=null?programGuid=xxxx&bitrate=adaptive&playlist=1920x804_iframe",BANDWIDTH=253475
,AVERAGE-BANDWIDTH=70520,CODECS="avc1.4d4029",RESOLUTION=1920x804,VIDEO-
RANGE=SDR
}}}
You can guess by the uri that they will return another m3u8 for each
track, for example the subtitle uri, the content of
"https://xxxx.com:443/api_v2/getm3u8.jsp;jsessionid=null?programGuid=xxxx&bitrate=adaptive&playlist=subtitles_en";
is:
{{{
#EXTM3U
#EXT-X-VERSION:6
#EXT-X-PLAYLIST-TYPE:VOD
#EXT-X-TARGETDURATION:6913
#EXT-X-MEDIA-SEQUENCE:0
#EXTINF:6913.0,
https://xxxx.com/apple/00/96/d1/adaptive/text/ENG_xxxx.vtt
#EXT-X-ENDLIST
}}}
The ffmpeg can handle the nested m3u8 for video and audio correctly in
this case, but not for the subtitle, it show the message:
{{{
[hls @ 0000023126e57800] Can't support the subtitle(uri:
https://xxxx.com:443/api_v2/getm3u8.jsp;jsessionid=null?programGuid=xxxx&bitrate=adaptive&playlist=subtitles_en)
}}}
I am not sure if it is a bug report or feature request... 🤔
--
Ticket URL: <https://trac.ffmpeg.org/ticket/11378>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
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