utvideoenc: use av_image_copy_plane()

Signed-off-by: Paul B Mahol <onemda@gmail.com>
zmbv: return meaningful error code

Signed-off-by: Paul B Mahol <onemda@gmail.com>
targa_y216dec: remove empty function

Signed-off-by: Paul B Mahol <onemda@gmail.com>
dpxenc: cosmetics: reindent

Signed-off-by: Paul B Mahol <onemda@gmail.com>
dpx: use av_image_copy_plane()

Signed-off-by: Paul B Mahol <onemda@gmail.com>
lavc: do not override format if neither text nor bitmap codec prop is set

Some decoders may output both, this way the decoder can set it.

Signed-off-by: Marton Balint <cus@passwd.hu>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>