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608 subtitles support

kbhatt@ooyala.com

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Joined: April 19, 2016

Does mp4split support embedded 608 subtitles? This piece of documentation seems to suggest that 608/708 subtitles are supported. But when I run the command listed there, mp4split fails to detect a subtitle stream.

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vagrant@triforce:/mnt/my/workspaces$ /opt/playready/bin/mp4split -v 4 --package-hls -o subs.m3u8 Tears_w_608.mp4 --track_type=text --track_groupid=captions --track_description="Closed Captions"
mp4split version=1.7.10 (6086M) Copyright 2007-2015 CodeShop B.V.

found 1 files
opening: file:///mnt/my/workspaces/Tears_w_608.mp4
get_handler_io: file:///mnt/my/workspaces/Tears_w_608.mp4 [not cached]
file(/mnt/my/workspaces/Tears_w_608.mp4):map(0, 128)
file(/mnt/my/workspaces/Tears_w_608.mp4):map(22442259, 16)
file(/mnt/my/workspaces/Tears_w_608.mp4):map(22365497, 16)
file(/mnt/my/workspaces/Tears_w_608.mp4):map(22368143, 74132)
scanning for subtitles in file:///mnt/my/workspaces/Tears_w_608.mp4:1
file(/mnt/my/workspaces/Tears_w_608.mp4):map(48, 942)
Status: 404 FMP4_NO_INPUT_TRACKS
X-USP-Error: no input tracks found
vagrant@triforce:/mnt/my/workspaces$
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ffprobe shows a subtitles track "Stream #0.2(und): Subtitle: c608 / 0x38303663, 0 kb/s". I'm able to play in QuickTime Player 10.4 and select the subtitle track.


vagrant@triforce:/mnt/my/workspaces$ ffprobe Tears_w_608.mp4
avprobe version 0.8.17-4:0.8.17-0ubuntu0.12.04.2, Copyright (c) 2007-2014 the Libav developers
built on Apr 1 2016 14:24:20 with gcc 4.6.3
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x235e7a0] max_analyze_duration reached
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Tears_w_608.mp4':
Metadata:
major_brand : mp42
minor_version : 512
compatible_brands: isomiso2avc1mp41
creation_time : 2016-04-01 20:46:39
encoder : HandBrake 0.10.5 2016021100
Duration: 00:01:40.03, start: 0.000000, bitrate: 1794 kb/s
Stream #0.0(und): Video: h264 (Main), yuv420p, 1280x534 [PAR 1:1 DAR 640:267], 1626 kb/s, 24 fps, 24 tbr, 90k tbn, 180k tbc
Metadata:
creation_time : 2016-04-01 20:46:39
Stream #0.1(eng): Audio: aac, 44100 Hz, stereo, s16, 162 kb/s
Metadata:
creation_time : 2016-04-01 20:46:39
Stream #0.2(und): Subtitle: c608 / 0x38303663, 0 kb/s
Metadata:
creation_time : 2016-04-19 19:24:11
Unsupported codec with id 0 for input stream 2
vagrant@triforce:/mnt/my/workspaces$

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Posted on April 19, 2016 at 10:29 PM

ahmedamine519@gmail.com

Total Posts:
Joined: March 23, 2018

Re: 608 subtitles support

I have a few sample ts files that have CEA 608 closed captioning available in them. I know this because when I play it using VLC player for Android, it is able to successfully display the captions. However, VLC player has frame rate issues when rendering the captions which is why I'd like to use Exoplayer. I've hosted the files on a server, and then tried using the demo app to play the files. The demo app doesn't recognise the captions in the file. Tutuapp 9apps Showbox

Posted on July 24, 2018 at 10:56 PM

ewout@unified-streaming.com

Total Posts:
Joined: November 04, 2016

Re: 608 subtitles support

@kbhatt@ooyala.com

I tried to reach out to you through email regarding your post, but I got a 'mail delivery failed' notification.
Is the email address you use the email address I can contact you on?

If not, please let me know how I can reach you.

Regards,

Ewout

Posted on July 26, 2018 at 10:28 AM