doc/filters: use '|' instead of ':' in the documentation.

Using colons to separate the outdefs is deprecated. Switch to using '|'
to separate the list items.

Signed-off-by: Simon Thelen <ffmpeg-dev@c-14.de>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
lavf/ffmenc: fix memleak in ffm_write_header

Regression since 745730c9c208c40f800d5d71ffa39aceab6ce044.
The dynamic buffer was not being used or freed.

Reviewed-by: Michael Niedermayer <michaelni@gmx.at>
Signed-off-by: James Almer <jamrial@gmail.com>
avcodec/options: Set AVCodecContext->codec upon initialization.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>