ffdec

Warning

GPAC's wiki has moved to wiki.gpac.io.

This github wiki will no longer be updated.

You can contribute to GPAC's documentation here.

FFMPEG decoder

Register name used to load filter: ffdec
This filter may be automatically loaded during graph resolution.

This filter decodes audio and video streams using FFMPEG.
See FFMPEG documentation (https://ffmpeg.org/documentation.html) for more details.
To list all supported decoders for your GPAC build, use gpac -h ffdec:*.

Options can be passed from prompt using --OPT=VAL
The default threading mode is to let libavcodec decide how many threads to use. To enforce single thread, use --threads=1

Codec Map

The ffcmap option allows specifying FFMPEG codecs for codecs not supported by GPAC.
Each entry in the list is formatted as GID@name or GID@+name, with:

• GID: 4CC or 32 bit identifier of codec ID, as indicated by gpac -i source inspect:full
• name: FFMPEG codec name
• `+': is set and extra data is set and formatted as an ISOBMFF box, removes box header

Example

gpac -i source.mp4 --ffcmap=BKV1@binkvideo vout

This will map an ISOBMFF track declared with coding type BKV1 to binkvideo.

Options

ffcmap (strl): codec map
c (str): codec name (GPAC or ffmpeg), only used to query possible arguments - updated to ffmpeg codec name after initialization
* (str): any possible options defined for AVCodecContext and sub-classes. See gpac -hx ffdec and gpac -hx ffdec:*