I've got an m3u8 playlist that is constantly being updated as soon as new .ts segments are written for live streaming. However, playing it back seems to not work correctly. It would play the video of the m3u8 playlist for about 15-20 seconds then it would stop and show a loading indicator.
Both the .ts files and .m3u8 playlist are uploaded and updated on S3.
Here's my playlist:
#EXTM3U
#EXT-X-VERSION:3
#EXT-X-TARGETDURATION:8
#EXT-X-MEDIA-SEQUENCE:20
#EXTINF:4.800000,
live20.ts
#EXTINF:4.800000,
live21.ts
#EXTINF:4.800000,
live22.ts
#EXTINF:4.800000,
live23.ts
#EXTINF:7.200000,
live24.ts
#EXTINF:4.800000,
live25.ts
#EXTINF:4.800000,
live26.ts
#EXTINF:4.800000,
live27.ts
#EXTINF:4.800000,
live28.ts
#EXTINF:4.800000,
live29.ts
Anyone know what the issue is here?
Related
I want to fetch hls video segments by time interval.
Suppose I have seg1.m4s / seg2.m4s ..., and each seg is 1 minutes long and size is 10000 bytes.
If I want to play from 1:30 ~ 3:30, it means the hls would start from middle of seg2 to middle of seg4.
This why I would need to dynamic generate m3u8 list and EXT-X-BYTERANGE.
However I encounter some problem.
Here is my m3u8 list now
#EXTM3U
#EXT-X-VERSION:7
#EXT-X-TARGETDURATION:11
#EXT-X-MEDIA-SEQUENCE:0
#EXT-X-PLAYLIST-TYPE:VOD
#EXT-X-ALLOW-CACHE:YES
#EXT-X-MAP:URI="init.mp4",
#EXTINF:30.0,
#EXT-X-BYTERANGE:5000#5000,
seg2.m4s
#EXTINF:60.0,
seg3.m4s
#EXTINF:30.0,
#EXT-X-BYTERANGE:5000#0,
seg4.m4s
#EXT-X-ENDLIST
It would play only seg2.m4s and stop.
the question is:
in different level playlist who have the same sequence number, MUST they present the same content(e.g. both level1-fileSequence2.ts, level2-fileSequence2.ts duration is 10:00:00-10:00:10) ?
OR for thest different level's ts file, if they present the same period content, must they have the same sequence number?
playlist
#EXTM3U
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=150000,RESOLUTION=416x234, \
CODECS="avc1.42e00a,mp4a.40.2"
level1.m3u8
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=240000,RESOLUTION=416x234, \
CODECS="avc1.42e00a,mp4a.40.2"
level2.m3u8
level1.m3u8
#EXTM3U
#EXT-X-TARGETDURATION:10
#EXT-X-VERSION:3
#EXT-X-MEDIA-SEQUENCE:1
#EXTINF:10,
level1-fileSequence1.ts
#EXTINF:10,
level1-fileSequence2.ts
level2.m3u8
#EXTM3U
#EXT-X-TARGETDURATION:10
#EXT-X-VERSION:3
#EXT-X-MEDIA-SEQUENCE:2
#EXTINF:10,
level2-fileSequence2.ts
#EXTINF:10,
level2-fileSequence3.ts
Not necessarily, for both questions.
As a quick note, the name of the file doesn't matter at all. From the HLS specification:
A client MUST NOT assume that segments with the same Media Sequence
Number in different Variant Streams or Renditions have the same
position in the presentation; Playlists MAY have independent Media
Sequence Numbers. Instead, a client MUST use the relative position
of each segment on the Playlist timeline and its Discontinuity
Sequence Number to locate corresponding segments.
Source: HLS Draft
I have a hls playlist playlist.m3u8 file where the url's of all the chunks are there.
#EXTM3U
#EXT-X-VERSION:3
#EXT-X-TARGETDURATION:11
#EXT-X-MEDIA-SEQUENCE:0
#EXTINF:10,
01-0.ts
#EXTINF:10,
01-1.ts
#EXTINF:10,
01-2.ts
#EXTINF:10,
01-3.ts
#EXTINF:10,
01-4.ts
#EXTINF:10,
01-5.ts
#EXTINF:10,
01-6.ts
#EXTINF:10,
01-7.ts
Even if I change the media sequence no to , say 5, it always plays from the start. Is there anyway that I can play the content from any given point i.e not always from the start ? Please help me.
If you want to keep all the segments in the playlist you can use the optional tag #EXT-X-START:TIME-OFFSET=<seconds>. This is available in version 6 of the protocol.
Source: https://datatracker.ietf.org/doc/html/draft-pantos-http-live-streaming-12#section-3.4.16
I have an HLS playlist of type EVENT. It has the #EXT-X-PLAYLIST-TYPE:EVENT tag. The playlist is not finished. It does not have an #EXT-X-ENDLIST tag.
When I play the playlist in Quicktime, it doesn't allow me to seek around. Since this is an event playlist, all the previous segments are available. Quicktime should have everything it needs to seek back.
I have tried this on OS X 10.6 and Maverick and the problem occurs. I have also tried this on an old iPad running iOS 5. On iOS 5 the problem doesn't occur.
Here is the playlist itself:
#EXTM3U
#EXT-X-VERSION:6
#EXT-X-ALLOW-CACHE:NO
#EXT-X-MEDIA-SEQUENCE:0
#EXT-X-PLAYLIST-TYPE:EVENT
#EXT-X-START:TIME-OFFSET=0,PRECISE=NO
#EXT-X-TARGETDURATION:10
#EXTINF:10,
live_robocop_hd-rate_01_6512.ts
#EXTINF:10,
live_robocop_hd-rate_01_6513.ts
#EXTINF:10,
live_robocop_hd-rate_01_6514.ts
#EXTINF:10,
live_robocop_hd-rate_01_6515.ts
# ... more segments here ...
I have an album stored as a list of gapless m4a files, ripped from CD. I need to stream the album gaplessly over HTTP Live Streaming, and the user must be able to "jump in" at the start of any track. For now, my only client is AVPlayer on iOS.
I can segment the tracks individually using Apple's mediafilesegmenter tool. For each track, this produces one .m3u8 playlist file and several .aac segment files, each ~10 seconds in duration except for the last.
The m3u8 playlist for Track 1 looks like this:
#EXTM3U
#EXT-X-TARGETDURATION:11
#EXT-X-VERSION:3
#EXT-X-MEDIA-SEQUENCE:0
#EXT-X-PLAYLIST-TYPE:VOD
#EXTINF:10.001,
segment0.aac
#EXTINF:9.983,
segment1.aac
...
#EXTINF:3.231,
segment23.aac
#EXT-X-ENDLIST
I can combine these m3u8 playlist files into one master m3u8 file for the album:
#EXTM3U
#EXT-X-TARGETDURATION:11
#EXT-X-VERSION:3
#EXT-X-MEDIA-SEQUENCE:0
#EXT-X-PLAYLIST-TYPE:VOD
#EXTINF:10.001, // begin track 1
segment0.aac
#EXTINF:9.983,
segment1.aac
...
#EXTINF:3.231,
segment23.aac
#EXT-X-DISCONTINUITY
#EXTINF:10.001, // begin track 2
segment24.aac
#EXTINF:9.983,
segment25.aac
...
#EXTINF:6.845,
segment46.aac
#EXT-X-DISCONTINUITY
#EXTINF:10.001, // begin track 3
segment47.aac
#EXTINF:9.983,
segment48.aac
...
#EXTINF:8.012,
segment80.aac
#EXT-X-ENDLIST
It will play through the whole album, but it isn't gapless. Notice the DISCONTINUITY tag between each track (without it, the player hangs forever). This introduces a small gap between tracks, maybe 300 milliseconds.
How can I create segments that flow into each other with no discontinuity?
You can concatenate the AAC files before using the mediafilesegmenter tool on the combined AAC file.
The following ffmpeg command might generate the output file.
ffmpeg -i "concat:input1.aac|input2.aac|input3.aac" -c copy output.aac
It's possible you'll need to remux the aac files to mpeg2ts files before concatenation, and then remux the mpeg2ts file to AAC.