The global header is not explicitly required for playback, and omitting it allows for simple concatenation.
aa69cbc flac muxer: add option to disable writing the global header
libavformat/flacenc.c | 28 ++++++++++++++++++++++++++++
libavformat/version.h | 2 +-
2 files changed, 29 insertions(+), 1 deletion(-)
Upstream: git.libav.org