Makes valgrind happy.

Otherwise, setting string will try to free a random address.

* cus/stable:
  ffplay: fix build if avfilter is disabled
  ffplay: fix frame_delay calculation in new avfilter code
  ffplay: add support for changing pixel format
  ffplay: add missing filt_in assignment after video filter reconfigure
  ffplay: fix frame aspect ratio after qatar merge
  ffplay: fix use after free
  ffplay: use dummy video driver if display is disabled
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* qatar/master:
  mpegts: Remove disabled extension matching probe.
  fate: avoid freopen(NULL) in videogen/rotozoom

Conflicts:
	tests/rotozoom.c
	tests/videogen.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

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

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

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

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

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

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

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

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

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

It makes the transcode loop easier to read (30% less code)
and the differences with avconv easier to spot.

Fixes sporadic segfaults with some filters.

A number of systems do not implement freopen() with a NULL filename
correctly.  This changes these programs to output individual images
if opening a named output argument as a file fails, in this case
assuming it is a directory.
Signed-off-by: Mans Rullgard <mans@mansr.com>

Signed-off-by: Marton Balint <cus@passwd.hu>

Signed-off-by: Marton Balint <cus@passwd.hu>

With the filtering code refactored, it was much easier to finally fix this.

Fixes ticket 123 and 238.
Signed-off-by: Marton Balint <cus@passwd.hu>

Fixes segfaults on changing resolution.
Signed-off-by: Marton Balint <cus@passwd.hu>

Signed-off-by: Marton Balint <cus@passwd.hu>

reproduceable with:
ffmpeg -i tests/lena.pnm -pix_fmt pal8 -vcodec rawvideo -s 512x512 out.avi
valgrind ffplay_g out.avi
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Signed-off-by: Marton Balint <cus@passwd.hu>

Fixes ticket 1402.
Signed-off-by: Marton Balint <cus@passwd.hu>

A duration value is undefined when is 0, take into consideration this
fact when printing optional fields.

The function was introduced in 4d6a8a2b and is not used anymore
outside avfilter.c.

This avoids to pollute the public API with an apparently unnecessary
function. The function was introduced a few days ago, so removing it from
the public API should do no much harm.

Include missing required internal headers.

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

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

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

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

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

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

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