[FFmpeg-devel] [PATCH 0/3] 3GPP TS 26.245 Timed Text Encoder. (v2)

Clément Bœsch ubitux at gmail.com
Sun Jul 29 11:53:37 CEST 2012

On Thu, Jul 26, 2012 at 08:37:50PM -0700, Philip Langdale wrote:
> This patch series introduces support for encoding subtitles as 3GPP
> timed text into mp4/mov containers. As with the decoder, there's no
> styling support currently.
> Note that this feature requires a change to the actual muxer to
> handle the insertion of empty packets to signify the end of a subtitle
> duration.
> Also note that one of the most common use-cases (remuxing from mkv to
> mp4) will not work yet, as the subtitle duration is put in the
> convergence_duration by the mkv demuxer. We still need to resolve this
> matter and decide whether it is appropriate to use convergence_duration
> at all, and if so, how to cleanly reconcile the use of both fields.

From what I can tell, at the moment the convergence_duration is actually
never used (since we dropped the usage from mkv).


BTW, maybe I think it's important to mention the related patch you posted:

Clément B.
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