validate: launcher: Keep variable framerate from input when possible

But disable it if forcing a framerate for some reason

Fixing our support for variable framerate in the encoding profile
serialization format.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3122>

subprojects/gst-devtools/validate/launcher/apps/gstvalidate.py

@@ -17,6 +17,7 @@
 # Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
 # Boston, MA 02110-1301, USA.
 import argparse
+from fractions import Fraction
 import os
 import copy
 import sys
@@ -34,7 +35,7 @@ from launcher.loggable import Loggable, error
 from launcher.baseclasses import GstValidateTest, Test, \
     ScenarioManager, NamedDic, GstValidateTestsGenerator, \
     GstValidateMediaDescriptor, GstValidateEncodingTestInterface, \
-    GstValidateBaseTestManager, MediaDescriptor, MediaFormatCombination
+    GstValidateBaseTestManager, MediaDescriptor, MediaFormatCombination, VariableFramerateMode
 
 from launcher.utils import path2url, url2path, DEFAULT_TIMEOUT, which, \
     GST_SECOND, Result, Protocols, mkdir, printc, Colors, get_data_file, \
@@ -819,7 +820,18 @@ class GstValidateTranscodingTest(GstValidateTest, GstValidateEncodingTestInterfa
         if urllib.parse.urlparse(self.dest_file).scheme == "":
             self.dest_file = path2url(self.dest_file)
 
-        profile = self.get_profile()
+        variable_framerate = VariableFramerateMode.DISABLED
+        if self.media_descriptor.get_num_tracks("video") == 1:
+            caps, = [c for (t, c) in self.media_descriptor.get_tracks_caps() if t == 'video']
+            framerate = None
+            for struct, _ in GstCaps.new_from_str(caps):
+                framerate = struct.get("framerate", None)
+                if framerate is not None and \
+                        framerate.numerator == 0 and framerate.denominator == 1:
+                    variable_framerate = VariableFramerateMode.AUTO
+                    break
+
+        profile = self.get_profile(variable_framerate=variable_framerate)
         self.add_arguments("-o", profile)
 
     def build_arguments(self):

subprojects/gst-devtools/validate/launcher/baseclasses.py

@@ -19,6 +19,7 @@
 
 """ Class representing tests and test managers. """
 
+from enum import Enum
 import importlib.util
 import json
 import os
@@ -43,7 +44,7 @@ import uuid
 from itertools import cycle
 from fractions import Fraction
 
-from .utils import which
+from .utils import GstCaps, which
 from . import reporters
 from . import loggable
 from .loggable import Loggable
@@ -1218,6 +1219,12 @@ class GstValidateTest(Test):
         return result
 
 
+class VariableFramerateMode(Enum):
+    DISABLED = 1
+    ENABLED = 2
+    AUTO = 3
+
+
 class GstValidateEncodingTestInterface(object):
     DURATION_TOLERANCE = GST_SECOND / 4
 
@@ -1243,7 +1250,9 @@ class GstValidateEncodingTestInterface(object):
 
     def _get_profile_full(self, muxer, venc, aenc, video_restriction=None,
                           audio_restriction=None, audio_presence=0,
-                          video_presence=0, variable_framerate=False):
+                          video_presence=0,
+                          variable_framerate=VariableFramerateMode.DISABLED):
+
         ret = ""
         if muxer:
             ret += muxer
@@ -1254,9 +1263,14 @@ class GstValidateEncodingTestInterface(object):
             ret += venc
             props = ""
             if video_presence:
-                props += 'presence=%s,' % str(video_presence)
-            if variable_framerate:
-                props += 'variable-framerate=true,'
+                props += 'presence=%s|' % str(video_presence)
+            if variable_framerate == VariableFramerateMode.AUTO:
+                if video_restriction and "framerate" in video_restriction:
+                    variable_framerate = VariableFramerateMode.DISABLED
+                else:
+                    variable_framerate = VariableFramerateMode.ENABLED
+            if variable_framerate == VariableFramerateMode.ENABLED:
+                props += 'variable-framerate=true|'
             if props:
                 ret = ret + '|' + props[:-1]
         if aenc:
@@ -1270,7 +1284,7 @@ class GstValidateEncodingTestInterface(object):
         return ret.replace("::", ":")
 
     def get_profile(self, video_restriction=None, audio_restriction=None,
-            variable_framerate=False):
+            variable_framerate=VariableFramerateMode.DISABLED):
         vcaps = self.combination.get_video_caps()
         acaps = self.combination.get_audio_caps()
         if video_restriction is None: