pcm-dvd: remove redundant log message

Signed-off-by: Paul B Mahol <onemda@gmail.com>
pcm-dvd: use av_freep()

Signed-off-by: Paul B Mahol <onemda@gmail.com>
avcodec/ffv1dec: move initial_states init to init_thread_copy()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/ffv1dec: reorganize thread init/update

This moves some allocations to init, reducing possible failure modes in update.
Always copies from the previous context instead of just during init

Fixes Ticket2923

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