Hello,
I stream an HLS video with WebVTT in the master playlist. When I enable the CC, the player downloads the first vtt file and then it does not download.
When I play the same on my Mac safati, it works fine and the CC is displayed.
I tried it on iOS9 and iOS9.1 with same results. Same works fine on my android app. Any clue on this will be greatly appreciated.
Have you tried running the MediaStreamValidator tool against your master playlist to ensure that the playlists are all formatted properly?
You can download our streaming tools from https://developer.apple.com/streaming/.
Thank you for your response. Yes I did validated it and it the following is the message on the webvtt, everything else was OK.
Playlist Syntax:
Warning: (0:0) Subtitle playlists will be validated, but subtitle segments will not
Processed 0 out of 6 segments
I didnt find a way to validate the webvtt itself, but I have one sample here.
WEBVTT
X-TIMESTAMP-MAP=MPEGTS:10134, LOCAL:00:00:00.000
NOTE 0X15F830E08 -> 0X15F85FCC8
18:12:07.461 --> 18:12:09.596 line:92% size:100% align:start
I certainly can't reach out
to them for help,
NOTE 0X15F86143E -> 0X15F87D200
18:12:09.663 --> 18:12:10.931 line:100% size:100% align:start
but I know you can.
Second webvtt file looks like this
WEBVTT
X-TIMESTAMP-MAP=MPEGTS:10134, LOCAL:00:00:00.000
NOTE 0X15F8C670C -> 0X15F8EB192
18:12:14.267 --> 18:12:15.936 line:100% size:100% align:start
So I must present my agenda
NOTE 0X15F8EC908 -> 0X15F91138E
18:12:16.002 --> 18:12:17.671 line:92% size:100% align:start
to my own people
__________________________________________________
Following is some details of the matching segment
[PACKET]
codec_type=video
stream_index=1
pts=5897415648
pts_time=65526.840533
dts=5897412645
dts_time=65526.807167
duration=3003
duration_time=0.033367
convergence_duration=N/A
convergence_duration_time=N/A
size=16401
pos=752
flags=K
[/PACKET]
[PACKET]
codec_type=video
stream_index=1
pts=5897421654
pts_time=65526.907267
dts=5897415648
dts_time=65526.840533
duration=3003
duration_time=0.033367
convergence_duration=N/A
convergence_duration_time=N/A
size=2539
pos=17860
flags=_
[/PACKET]
[PACKET]
codec_type=video
stream_index=1
pts=5897418651
pts_time=65526.873900
dts=5897418651
dts_time=65526.873900
duration=3003
duration_time=0.033367
convergence_duration=N/A
convergence_duration_time=N/A
size=145
pos=20492
flags=_
[/PACKET]
Sure. Meanwhile could you please suggest any workaround? We dont have the CC in the stream so, it will be FCC compliance issue.
Could you tell me what would be CC clock reset time, 12 hours? or 24 hours? or is it even different?
Josh or Anyone,
Any tips, clues, the defect was raised but no update on that either.
