lavc: Add h264_metadata bitstream filter

Multimedia / FFmpeg - Mark Thompson [jkqxz.net] - 17 October 2017 15:56 EDT

This is able to modify some header metadata found in the SPS/VUI, and can also add/remove AUDs and insert user data in SEI NAL units.

(cherry picked from commit 9e93001b6135a23fe4e200196c08fb4fbffed6fc) (cherry picked from commit c42b62d1f9641f10ffc23cad9abbe47d8a4a165b)

a308872 lavc: Add h264_metadata bitstream filter
configure | 1 +
doc/bitstream_filters.texi | 63 +++++
libavcodec/Makefile | 1 +
libavcodec/bitstream_filters.c | 1 +
libavcodec/h264_metadata_bsf.c | 524 +++++++++++++++++++++++++++++++++++++++++
5 files changed, 590 insertions(+)

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