Closed Captions Support Embedded in H.264 Files
We are providing live closed captions for hundreds of our live sports broadcasts. All these broadcasts are encoded H.264 and transmitted using RTMP. At the end of each broadcast, we're like to take our H.264 recording, and edit it in Premiere. Unfortunately, Premiere does not appear to support embedded captions in H.264 import or export. That's unfortunate, since this is now industry standard. I can take my H.264 file with embedded captions and upload it to YouTube, Twitter, Facebook and others, and the captions remain without any issues. Adobe Premiere is the only issue in this chain, which is slowing down the work flow.
I understand that Premiere supports QuickTime files with embedded captions, but that doesn't work for large files like we have, which are 2-3 hours long. Using QuickTime with ProRes would make the files far too large. We need support for 708 and 608 embedded captions in H.264. Any way that can be supported?
Adobe Staff - Nate commented
For H.264, using sidecar formats is the recommended workflow. That is how current YouTube captioning works.
Thanks for reaching out.
Antoine (Autokroma.com) commented
You need them at both import and export ?