Inserting accessibility content to a DCP

[vitorliesenfeld]

Hi Carsten, do you have the video?

Hi Christian,

nice video. A bit longish, but on the other hand, it's nice to see how you start with the basic elements, and then end in an actual auditorium with all the content on screen and personal devices. I also liked the way you referenced the ISDCF audio mapping document.
I feel you rushed a bit over the arrangement of the individual content elements (e.g. you could have showed the timeline view for a quick check to see wether everything is in place).

But - don't get me wrong, nice work, and excellent demonstration! I followed the Libras for cinema discussion on the ISDCF mailing list closely, and how they rushed legislation without actual technology being available. Good to see that everything comes together now, and that DCP-o-matic can actually be a part of it.

- Carsten

[Carsten]

No, it has been on and off youtube every now and then. Frankly I don't consider it necessary as of today, many settings have changed and there are other sources for information.

[vitorliesenfeld]

Understood, but can you send any material about how to do it? I searching a lot an didn't find how properly do it

[barber]

Hi vitorliesenfeld,

If you're on Windows you can follow Steph's instructions below. His "Sign-Language-Video-Encoding-master" executable is available there : https://drive.google.com/file/d/1m6A6jq ... drive_link

I have just made a graphical interface which only works under Windows and which allows me to create the wav file for channel 15 of the DCP.
If this helps anyone.

1) The video frame rate shall be 24.0 fps regardless of any other DCP frame rates in use.
2) The video shall be 480 pixels wide and 640 pixels high (i.e., portrait orientation).


my program is running on windows and just making the complete PCM wav file like the ISDCF 'encode' script (https://github.com/ISDCF/Sign-Language-Video-Encoding)
Structure of a PCM bloc :
H1 = 0xFFFFFFFF
Lv = Length of VP9 segment in bytes (32-bit unsigned integer, big-endian)
Lb = Length of PCM Block in bytes (32-bit unsigned integer, big-endian)
Le = Length of VP9 EBML Header in bytes (32-bit unsigned integer, big-endian)
H2 = 0xFFFFFFFF
E = VP9 EBML Header
P = A sequence of Lb – Lv – Le – 20 null bytes

1) create a folder in your desktop
2) put in this folder the executable Sign-Language-Video-Encoding-master.exe ( https://wetransfer.com/downloads/efdccf ... 301/040dcf
)
3) download the ffmpeg binaries for windows (i.e v6.0) : https://www.gyan.dev/ffmpeg/builds/pack ... _build.zip
4) add ffmpeg.exe ffprobe.exe into the folder
5) run the application


This will generate a wav file for channel 15 of a DCP.