Encoding : HLS - filter_complex

[Yannis Marti]

Hi All,

Sorry, it's me again... .I'm trying to figure out how HLS encoding as been implemented in multiencode / process-smil. There is some part of information in the documentation, but nothing very relevant.

As i'm trying to encode a .ts with multiple audio in a mp4/fmp4 - in the spirit of fast-HLS workflow: the generated -filter_complex map is an issue for me.

Is there a way to manually set it up? Did i miss some specific documentation?

Again, thanks all for your time on this great project,

Yannis

related docs :
https://docs.opencast.org/r/9.x/admin/#workflowoperationhandlers/process-smil-woh/

https://docs.opencast.org/r/9.x/admin/#workflowoperationhandlers/multiencode-woh/

[Yannis Marti]

I found some answers on this module : https://github.com/opencast/opencast/blob/develop/modules/composer-ffmpeg/src/main/java/org/opencastproject/composer/impl/EncoderEngine.java
From what i can understand, ... i'm not in a good position :-D

[Phoebe Miller]

Hi Yannis,

What is the problem with generated  filter_complex ?

Is it a problem with multiple audio? It is not something that we have to deal with. 

If you can send me a short clip of your .ts file (say 10 seconds) and the error messages. 

I can take a look.

Phoebe.

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[Yannis Marti]

Hi Phoebe,

Thank you for answering me. We are working on a setup who live stream and rec a mpeg-ts who include 1 presenter, 8 different languages and 1 presentation. Live stream is working well on paella.
I would like to output this on S3/Cloudfront as HLS files to be streamable to paella.
I can make it work with a standard workflow, ingesting my .ts and outputting my .mp4 but if I try to setup this on specific HLS workflow, my map setup is broken by generated tee map used by opencast for multiencode / HLS-multiencode.
There is no real error message, files is not output as expected as I cannot create the maping below :

master.m3u8
|__1080_video_only.m3u8
  |__-map 0:0 /or/ -map 0:v:0
|__ 720_video_only.m3u8
  |__-map 0:0 /or/ -map 0:v:0
|__ 480_video_only.m3u8
  |__-map 0:0 /or/ -map 0:v:0
|__ 270_video_only.m3u8
  |__-map 0:0 /or/ -map 0:v:0
|__ mul_audio_only.m3u8
  |__-map 0:1 /or/ -map 0:a:0
|__ eng_audio_only.m3u8
  |__-map 0:2 /or/ -map 0:a:1
|__ fra_audio_only.m3u8
  |__-map 0:3 /or/ -map 0:a:2
|__ ara_audio_only.m3u8
  |__-map 0:4 /or/ -map 0:a:3
|__ zho_audio_only.m3u8
  |__-map 0:5 /or/ -map 0:a:4
|__ rus_audio_only.m3u8
  |__-map 0:6 /or/ -map 0:a:5
|__ deu_audio_only.m3u8
  |__-map 0:7 /or/ -map 0:a:6

Any idea is welcome, i'm working this way from long time and maybe didn't think on this correctly.

Best regards,
Yannis