[Libav-user] libavcodec usage inside Cinelerra-GG [LONG]

Carl Eugen Hoyos ceffmpeg at gmail.com
Sun Nov 3 07:51:02 EET 2019

Am Sa., 2. Nov. 2019 um 23:32 Uhr schrieb Andrew Randrianasulu
<randrianasulu at gmail.com>:

> From manual available at https://cinelerra-gg.org/download/ (see CinelerraGG_manual_WIP.pdf)
> I found important (IMO) passage I wish to share to relevant list:
> p. 193:
> Outstanding Issues with ffmpeg: There are some problems that need to be ad-
>      dressed by the ffmpeg developer group that adversely affect Cinelerra. These
>      are stated below with the hopes that that group will fix them as time permits.
> • Make all the default parameters operational. When they are not, the
>   Cinelerra plugins can’t be initialized since the initial state of the filter
>   is not operational. If that is not possible, then provide a set of nominal
>   parameters for each plugin, so that they can be used as the plugins
>   initial default state.
> • Make the filter config function project the new parameter data into
>   the filter function at any point during filter operation. This is so that
>   continuous updates can be done as the plugin operates.
> • Improve seek codec restarts. The past predictor must be reset or recon-
>   structed after a seek. The only documented way to seek is open/seek/-
>   play. Reopening the format layer is very expensive.

Sadly, this is not how it works.

Feel free to open one reproducible (!) bug report against current
FFmpeg git head
on trac for one issue, pointing us to a pdf here will most likely not help.

Carl Eugen

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