lavf/dv: do not set video timebase more than once

Current code will call avpriv_set_pts_info() for each video frame,
possibly setting a different timebase if the stream framerate changes.
This violates API conventions, as the timebase is supposed to stay
constant after stream creation.

Change the demuxer to set a single timebase that is fine enough to
handle all supported DV framerates.

The seek tests change slightly because the new timebase is more
granular.

4 files changed, 44 insertions, 44 deletions

diff --git a/tests/ref/seek/lavf-dv b/tests/ref/seek/lavf-dv
index f63e4460be..95f19d28f0 100644
--- a/tests/ref/seek/lavf-dv
+++ b/tests/ref/seek/lavf-dv
@@ -3,9 +3,9 @@ ret: 0         st:-1 flags:0  ts:-1.000000
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:144000
 ret: 0         st:-1 flags:1  ts: 1.894167
 ret: 0         st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos:3456000 size:144000
-ret: 0         st: 0 flags:0  ts: 0.800000
+ret: 0         st: 0 flags:0  ts: 0.788333
 ret: 0         st: 0 flags:1 dts: 0.800000 pts: 0.800000 pos:2880000 size:144000
-ret: 0         st: 0 flags:1  ts:-0.320000
+ret: 0         st: 0 flags:1  ts:-0.317500
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:144000
 ret: 0         st: 1 flags:0  ts: 2.560000
 ret: 0         st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos:3456000 size:144000
@@ -15,9 +15,9 @@ ret: 0         st:-1 flags:0  ts: 0.365002
 ret: 0         st: 0 flags:1 dts: 0.360000 pts: 0.360000 pos:1296000 size:144000
 ret: 0         st:-1 flags:1  ts:-0.740831
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:144000
-ret: 0         st: 0 flags:0  ts: 2.160000
+ret: 0         st: 0 flags:0  ts: 2.153333
 ret: 0         st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos:3456000 size:144000
-ret: 0         st: 0 flags:1  ts: 1.040000
+ret: 0         st: 0 flags:1  ts: 1.047500
 ret: 0         st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos:3456000 size:144000
 ret: 0         st: 1 flags:0  ts:-0.040000
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:144000
@@ -27,9 +27,9 @@ ret: 0         st:-1 flags:0  ts: 1.730004
 ret: 0         st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos:3456000 size:144000
 ret: 0         st:-1 flags:1  ts: 0.624171
 ret: 0         st: 0 flags:1 dts: 0.640000 pts: 0.640000 pos:2304000 size:144000
-ret: 0         st: 0 flags:0  ts:-0.480000
+ret: 0         st: 0 flags:0  ts:-0.481667
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:144000
-ret: 0         st: 0 flags:1  ts: 2.400000
+ret: 0         st: 0 flags:1  ts: 2.412500
 ret: 0         st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos:3456000 size:144000
 ret: 0         st: 1 flags:0  ts: 1.320000
 ret: 0         st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos:3456000 size:144000
@@ -39,9 +39,9 @@ ret: 0         st:-1 flags:0  ts:-0.904994
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:144000
 ret: 0         st:-1 flags:1  ts: 1.989173
 ret: 0         st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos:3456000 size:144000
-ret: 0         st: 0 flags:0  ts: 0.880000
+ret: 0         st: 0 flags:0  ts: 0.883333
 ret: 0         st: 0 flags:1 dts: 0.880000 pts: 0.880000 pos:3168000 size:144000
-ret: 0         st: 0 flags:1  ts:-0.240000
+ret: 0         st: 0 flags:1  ts:-0.222500
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:144000
 ret: 0         st: 1 flags:0  ts: 2.680000
 ret: 0         st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos:3456000 size:144000
diff --git a/tests/ref/seek/vsynth_lena-dv b/tests/ref/seek/vsynth_lena-dv
index d318794157..afed1fbe72 100644
--- a/tests/ref/seek/vsynth_lena-dv
+++ b/tests/ref/seek/vsynth_lena-dv
@@ -3,49 +3,49 @@ ret: 0         st:-1 flags:0  ts:-1.000000
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:144000
 ret: 0         st:-1 flags:1  ts: 1.894167
 ret: 0         st: 0 flags:1 dts: 1.880000 pts: 1.880000 pos:6768000 size:144000
-ret: 0         st: 0 flags:0  ts: 0.800000
+ret: 0         st: 0 flags:0  ts: 0.788333
 ret: 0         st: 0 flags:1 dts: 0.800000 pts: 0.800000 pos:2880000 size:144000
-ret: 0         st: 0 flags:1  ts:-0.320000
+ret: 0         st: 0 flags:1  ts:-0.317500
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:144000
 ret: 0         st:-1 flags:0  ts: 2.576668
 ret: 0         st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:7056000 size:144000
 ret: 0         st:-1 flags:1  ts: 1.470835
 ret: 0         st: 0 flags:1 dts: 1.480000 pts: 1.480000 pos:5328000 size:144000
-ret: 0         st: 0 flags:0  ts: 0.360000
+ret: 0         st: 0 flags:0  ts: 0.365000
 ret: 0         st: 0 flags:1 dts: 0.360000 pts: 0.360000 pos:1296000 size:144000
-ret: 0         st: 0 flags:1  ts:-0.760000
+ret: 0         st: 0 flags:1  ts:-0.740833
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:144000
 ret: 0         st:-1 flags:0  ts: 2.153336
 ret: 0         st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:7056000 size:144000
 ret: 0         st:-1 flags:1  ts: 1.047503
 ret: 0         st: 0 flags:1 dts: 1.040000 pts: 1.040000 pos:3744000 size:144000
-ret: 0         st: 0 flags:0  ts:-0.040000
+ret: 0         st: 0 flags:0  ts:-0.058333
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:144000
-ret: 0         st: 0 flags:1  ts: 2.840000
+ret: 0         st: 0 flags:1  ts: 2.835833
 ret: 0         st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:7056000 size:144000
 ret: 0         st:-1 flags:0  ts: 1.730004
 ret: 0         st: 0 flags:1 dts: 1.720000 pts: 1.720000 pos:6192000 size:144000
 ret: 0         st:-1 flags:1  ts: 0.624171
 ret: 0         st: 0 flags:1 dts: 0.640000 pts: 0.640000 pos:2304000 size:144000
-ret: 0         st: 0 flags:0  ts:-0.480000
+ret: 0         st: 0 flags:0  ts:-0.481667
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:144000
-ret: 0         st: 0 flags:1  ts: 2.400000
+ret: 0         st: 0 flags:1  ts: 2.412500
 ret: 0         st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:7056000 size:144000
 ret: 0         st:-1 flags:0  ts: 1.306672
 ret: 0         st: 0 flags:1 dts: 1.320000 pts: 1.320000 pos:4752000 size:144000
 ret: 0         st:-1 flags:1  ts: 0.200839
 ret: 0         st: 0 flags:1 dts: 0.200000 pts: 0.200000 pos: 720000 size:144000
-ret: 0         st: 0 flags:0  ts:-0.920000
+ret: 0         st: 0 flags:0  ts:-0.905000
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:144000
-ret: 0         st: 0 flags:1  ts: 2.000000
+ret: 0         st: 0 flags:1  ts: 1.989167
 ret: 0         st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:7056000 size:144000
 ret: 0         st:-1 flags:0  ts: 0.883340
 ret: 0         st: 0 flags:1 dts: 0.880000 pts: 0.880000 pos:3168000 size:144000
 ret: 0         st:-1 flags:1  ts:-0.222493
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:144000
-ret: 0         st: 0 flags:0  ts: 2.680000
+ret: 0         st: 0 flags:0  ts: 2.671667
 ret: 0         st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:7056000 size:144000
-ret: 0         st: 0 flags:1  ts: 1.560000
+ret: 0         st: 0 flags:1  ts: 1.565833
 ret: 0         st: 0 flags:1 dts: 1.560000 pts: 1.560000 pos:5616000 size:144000
 ret: 0         st:-1 flags:0  ts: 0.460008
 ret: 0         st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos:1728000 size:144000
diff --git a/tests/ref/seek/vsynth_lena-dv-411 b/tests/ref/seek/vsynth_lena-dv-411
index d318794157..afed1fbe72 100644
--- a/tests/ref/seek/vsynth_lena-dv-411
+++ b/tests/ref/seek/vsynth_lena-dv-411
@@ -3,49 +3,49 @@ ret: 0         st:-1 flags:0  ts:-1.000000
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:144000
 ret: 0         st:-1 flags:1  ts: 1.894167
 ret: 0         st: 0 flags:1 dts: 1.880000 pts: 1.880000 pos:6768000 size:144000
-ret: 0         st: 0 flags:0  ts: 0.800000
+ret: 0         st: 0 flags:0  ts: 0.788333
 ret: 0         st: 0 flags:1 dts: 0.800000 pts: 0.800000 pos:2880000 size:144000
-ret: 0         st: 0 flags:1  ts:-0.320000
+ret: 0         st: 0 flags:1  ts:-0.317500
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:144000
 ret: 0         st:-1 flags:0  ts: 2.576668
 ret: 0         st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:7056000 size:144000
 ret: 0         st:-1 flags:1  ts: 1.470835
 ret: 0         st: 0 flags:1 dts: 1.480000 pts: 1.480000 pos:5328000 size:144000
-ret: 0         st: 0 flags:0  ts: 0.360000
+ret: 0         st: 0 flags:0  ts: 0.365000
 ret: 0         st: 0 flags:1 dts: 0.360000 pts: 0.360000 pos:1296000 size:144000
-ret: 0         st: 0 flags:1  ts:-0.760000
+ret: 0         st: 0 flags:1  ts:-0.740833
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:144000
 ret: 0         st:-1 flags:0  ts: 2.153336
 ret: 0         st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:7056000 size:144000
 ret: 0         st:-1 flags:1  ts: 1.047503
 ret: 0         st: 0 flags:1 dts: 1.040000 pts: 1.040000 pos:3744000 size:144000
-ret: 0         st: 0 flags:0  ts:-0.040000
+ret: 0         st: 0 flags:0  ts:-0.058333
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:144000
-ret: 0         st: 0 flags:1  ts: 2.840000
+ret: 0         st: 0 flags:1  ts: 2.835833
 ret: 0         st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:7056000 size:144000
 ret: 0         st:-1 flags:0  ts: 1.730004
 ret: 0         st: 0 flags:1 dts: 1.720000 pts: 1.720000 pos:6192000 size:144000
 ret: 0         st:-1 flags:1  ts: 0.624171
 ret: 0         st: 0 flags:1 dts: 0.640000 pts: 0.640000 pos:2304000 size:144000
-ret: 0         st: 0 flags:0  ts:-0.480000
+ret: 0         st: 0 flags:0  ts:-0.481667
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:144000
-ret: 0         st: 0 flags:1  ts: 2.400000
+ret: 0         st: 0 flags:1  ts: 2.412500
 ret: 0         st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:7056000 size:144000
 ret: 0         st:-1 flags:0  ts: 1.306672
 ret: 0         st: 0 flags:1 dts: 1.320000 pts: 1.320000 pos:4752000 size:144000
 ret: 0         st:-1 flags:1  ts: 0.200839
 ret: 0         st: 0 flags:1 dts: 0.200000 pts: 0.200000 pos: 720000 size:144000
-ret: 0         st: 0 flags:0  ts:-0.920000
+ret: 0         st: 0 flags:0  ts:-0.905000
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:144000
-ret: 0         st: 0 flags:1  ts: 2.000000
+ret: 0         st: 0 flags:1  ts: 1.989167
 ret: 0         st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:7056000 size:144000
 ret: 0         st:-1 flags:0  ts: 0.883340
 ret: 0         st: 0 flags:1 dts: 0.880000 pts: 0.880000 pos:3168000 size:144000
 ret: 0         st:-1 flags:1  ts:-0.222493
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:144000
-ret: 0         st: 0 flags:0  ts: 2.680000
+ret: 0         st: 0 flags:0  ts: 2.671667
 ret: 0         st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:7056000 size:144000
-ret: 0         st: 0 flags:1  ts: 1.560000
+ret: 0         st: 0 flags:1  ts: 1.565833
 ret: 0         st: 0 flags:1 dts: 1.560000 pts: 1.560000 pos:5616000 size:144000
 ret: 0         st:-1 flags:0  ts: 0.460008
 ret: 0         st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos:1728000 size:144000
diff --git a/tests/ref/seek/vsynth_lena-dv-50 b/tests/ref/seek/vsynth_lena-dv-50
index fae6d1b225..3b1d69ffa6 100644
--- a/tests/ref/seek/vsynth_lena-dv-50
+++ b/tests/ref/seek/vsynth_lena-dv-50
@@ -3,49 +3,49 @@ ret: 0         st:-1 flags:0  ts:-1.000000
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:288000
 ret: 0         st:-1 flags:1  ts: 1.894167
 ret: 0         st: 0 flags:1 dts: 1.880000 pts: 1.880000 pos:13536000 size:288000
-ret: 0         st: 0 flags:0  ts: 0.800000
+ret: 0         st: 0 flags:0  ts: 0.788333
 ret: 0         st: 0 flags:1 dts: 0.800000 pts: 0.800000 pos:5760000 size:288000
-ret: 0         st: 0 flags:1  ts:-0.320000
+ret: 0         st: 0 flags:1  ts:-0.317500
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:288000
 ret: 0         st:-1 flags:0  ts: 2.576668
 ret: 0         st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:14112000 size:288000
 ret: 0         st:-1 flags:1  ts: 1.470835
 ret: 0         st: 0 flags:1 dts: 1.480000 pts: 1.480000 pos:10656000 size:288000
-ret: 0         st: 0 flags:0  ts: 0.360000
+ret: 0         st: 0 flags:0  ts: 0.365000
 ret: 0         st: 0 flags:1 dts: 0.360000 pts: 0.360000 pos:2592000 size:288000
-ret: 0         st: 0 flags:1  ts:-0.760000
+ret: 0         st: 0 flags:1  ts:-0.740833
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:288000
 ret: 0         st:-1 flags:0  ts: 2.153336
 ret: 0         st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:14112000 size:288000
 ret: 0         st:-1 flags:1  ts: 1.047503
 ret: 0         st: 0 flags:1 dts: 1.040000 pts: 1.040000 pos:7488000 size:288000
-ret: 0         st: 0 flags:0  ts:-0.040000
+ret: 0         st: 0 flags:0  ts:-0.058333
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:288000
-ret: 0         st: 0 flags:1  ts: 2.840000
+ret: 0         st: 0 flags:1  ts: 2.835833
 ret: 0         st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:14112000 size:288000
 ret: 0         st:-1 flags:0  ts: 1.730004
 ret: 0         st: 0 flags:1 dts: 1.720000 pts: 1.720000 pos:12384000 size:288000
 ret: 0         st:-1 flags:1  ts: 0.624171
 ret: 0         st: 0 flags:1 dts: 0.640000 pts: 0.640000 pos:4608000 size:288000
-ret: 0         st: 0 flags:0  ts:-0.480000
+ret: 0         st: 0 flags:0  ts:-0.481667
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:288000
-ret: 0         st: 0 flags:1  ts: 2.400000
+ret: 0         st: 0 flags:1  ts: 2.412500
 ret: 0         st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:14112000 size:288000
 ret: 0         st:-1 flags:0  ts: 1.306672
 ret: 0         st: 0 flags:1 dts: 1.320000 pts: 1.320000 pos:9504000 size:288000
 ret: 0         st:-1 flags:1  ts: 0.200839
 ret: 0         st: 0 flags:1 dts: 0.200000 pts: 0.200000 pos:1440000 size:288000
-ret: 0         st: 0 flags:0  ts:-0.920000
+ret: 0         st: 0 flags:0  ts:-0.905000
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:288000
-ret: 0         st: 0 flags:1  ts: 2.000000
+ret: 0         st: 0 flags:1  ts: 1.989167
 ret: 0         st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:14112000 size:288000
 ret: 0         st:-1 flags:0  ts: 0.883340
 ret: 0         st: 0 flags:1 dts: 0.880000 pts: 0.880000 pos:6336000 size:288000
 ret: 0         st:-1 flags:1  ts:-0.222493
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:      0 size:288000
-ret: 0         st: 0 flags:0  ts: 2.680000
+ret: 0         st: 0 flags:0  ts: 2.671667
 ret: 0         st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:14112000 size:288000
-ret: 0         st: 0 flags:1  ts: 1.560000
+ret: 0         st: 0 flags:1  ts: 1.565833
 ret: 0         st: 0 flags:1 dts: 1.560000 pts: 1.560000 pos:11232000 size:288000
 ret: 0         st:-1 flags:0  ts: 0.460008
 ret: 0         st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos:3456000 size:288000