avformat/libmodplug: Reduce the probe score for small input

This ensures that theres enough data for mpeg_probe() to recognize mpeg-ps
Fixes Ticket2583

Based on code by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit c605adbf562fbf535e83ae427bb681bc45e440c8)
mathops/x86: work around inline asm miscompilation with GCC 4.8.1

The volatile is not required here, and prevents a miscompilation with GCC
4.8.1 when building on x86 with --cpu=i686

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 659df32a9d8984081ccd54adc3aee7daeb33388d)
rmdec: Pass AVIOContext to rm_read_metadata()

Fix null pointer dereference
Fixes Ticket2588

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit bf87908cd8da31e8f8fe75c06577170928ea70a8)

Conflicts:
	libavformat/rmdec.c
mpegts: only reopen pmt_cb filter if its different from the previous.

Fixes Ticket2632

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit b009267910df10c004b5f340a090d45da29089a0)
avformat/mov: Fix duration of fragmented mov

Fixes Ticket2757

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit dc2a13aa802fc691c25d5e0194818831058316ee)
mmsh: dont close context on seeking failure

Fixes Ticket2581

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit b4579a29c75e2968ede2ad002dd4a495dbfc883d)
mpeg12dec: avoid reinitialization on PS changes when possible.

Fixes Ticket2574

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 970c8df73528659925819dec31c4c8c0887f0321)

Conflicts:
	libavcodec/mpeg12dec.c
avcodec/kmvc: fix MV checks

Fixes Ticket2813
Fixes regression since 70b5583

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 3cd8aaa2b2e78faf039691e1c31ff4f8d94e3bc6)