diff -U2 -r /var/lib/copr-rpmbuild/results/openrv/upstream-unpacked/Source0/OpenRV-main/src/lib/image/MovieFFMpeg/MovieFFMpeg.cpp /var/lib/copr-rpmbuild/results/openrv/srpm-unpacked/main.tar.gz-extract/OpenRV-main/src/lib/image/MovieFFMpeg/MovieFFMpeg.cpp
--- /var/lib/copr-rpmbuild/results/openrv/upstream-unpacked/Source0/OpenRV-main/src/lib/image/MovieFFMpeg/MovieFFMpeg.cpp	2025-02-21 16:43:05.000000000 +0000
+++ /var/lib/copr-rpmbuild/results/openrv/srpm-unpacked/main.tar.gz-extract/OpenRV-main/src/lib/image/MovieFFMpeg/MovieFFMpeg.cpp	2025-02-13 20:16:45.000000000 +0000
@@ -4246,5 +4246,4 @@
             avStream->time_base.num = m_duration;
             avStream->time_base.den = m_timeScale;
-            avStream->avg_frame_rate = av_d2q(m_info.fps, INT_MAX);
             avCodecContext->time_base.num = m_duration;
             avCodecContext->time_base.den = m_timeScale;
@@ -4255,5 +4254,4 @@
             avCodecContext->height = m_info.height;
             avCodecContext->color_primaries = AVCOL_PRI_BT709; // 1
-            avCodecContext->framerate = avStream->avg_frame_rate;
             //
             //  XXX should come back to this.  should transfer function also be
diff -U2 -r /var/lib/copr-rpmbuild/results/openrv/upstream-unpacked/Source0/OpenRV-main/src/lib/ip/IPBaseNodes/SequenceGroupIPNode.cpp /var/lib/copr-rpmbuild/results/openrv/srpm-unpacked/main.tar.gz-extract/OpenRV-main/src/lib/ip/IPBaseNodes/SequenceGroupIPNode.cpp
--- /var/lib/copr-rpmbuild/results/openrv/upstream-unpacked/Source0/OpenRV-main/src/lib/ip/IPBaseNodes/SequenceGroupIPNode.cpp	2025-02-21 16:43:05.000000000 +0000
+++ /var/lib/copr-rpmbuild/results/openrv/srpm-unpacked/main.tar.gz-extract/OpenRV-main/src/lib/ip/IPBaseNodes/SequenceGroupIPNode.cpp	2025-02-13 20:16:45.000000000 +0000
@@ -18,6 +18,4 @@
 #include <TwkUtil/sgcHop.h>
 
-#include <algorithm>
-
 namespace IPCore
 {
@@ -102,13 +100,7 @@
         if (fps == 0.0 && !newInputs.empty())
         {
-            // Find the first input that has a discovered imageRangeInfo, and
-            // use it for the fps if any.
-            auto it = std::find_if(
-                newInputs.begin(), newInputs.end(), [](const auto& input)
-                { return !input->imageRangeInfo().isUndiscovered; });
-            if (it != newInputs.end())
-            {
-                fps = (*it)->imageRangeInfo().fps;
-            }
+            auto const imageRangeInfo = newInputs[index]->imageRangeInfo();
+            if (!imageRangeInfo.isUndiscovered)
+                fps = imageRangeInfo.fps;
         }
 
diff -U2 -r /var/lib/copr-rpmbuild/results/openrv/upstream-unpacked/Source0/OpenRV-main/src/plugins/rv-packages/otio_reader/otio_reader.py /var/lib/copr-rpmbuild/results/openrv/srpm-unpacked/main.tar.gz-extract/OpenRV-main/src/plugins/rv-packages/otio_reader/otio_reader.py
--- /var/lib/copr-rpmbuild/results/openrv/upstream-unpacked/Source0/OpenRV-main/src/plugins/rv-packages/otio_reader/otio_reader.py	2025-02-21 16:43:05.000000000 +0000
+++ /var/lib/copr-rpmbuild/results/openrv/srpm-unpacked/main.tar.gz-extract/OpenRV-main/src/plugins/rv-packages/otio_reader/otio_reader.py	2025-02-13 20:16:45.000000000 +0000
@@ -261,7 +261,4 @@
         }
 
-        # RV supports only one frame rate per sequence, so we'll use the rate of the first item in the sequence as our sequence rate
-        seq_rate = None
-
         for thing in items_to_serialize:
             if isinstance(thing, tuple):
@@ -275,12 +272,9 @@
                 edl_item, pre_item = thing, None
 
-            if seq_rate is None:
-                seq_rate = thing.trimmed_range().duration.rate
-
             if result:
                 new_inputs.append(result)
 
-                edl_range = _calculate_edl(edl, edl_time, edl_item, seq_rate, pre_item)
-                edl_time = edl_range.end_time_exclusive().rescaled_to(seq_rate)
+                edl_range = _calculate_edl(edl, edl_time, edl_item, pre_item)
+                edl_time = edl_range.end_time_exclusive()
 
         commands.setNodeInputs(new_seq, new_inputs)
@@ -334,5 +328,5 @@
 
 
-def _calculate_edl(edl, edl_time, item, seq_rate, pre_transition_item=None):
+def _calculate_edl(edl, edl_time, item, pre_transition_item=None):
     # EDL values don't make much sense for a transitions, since it has two
     # different sources as inputs. So if we have a transition, we'll just set
@@ -345,5 +339,5 @@
         out_frame = otio.opentime.to_frames(duration, rate)
     else:
-        in_frame, out_frame = _get_in_out_frame(item, item.trimmed_range(), seq_rate)
+        in_frame, out_frame = _get_in_out_frame(item, item.trimmed_range())
         duration = item.trimmed_range().duration
 
@@ -372,5 +366,5 @@
 
 
-def _get_in_out_frame(it, range_to_read, seq_rate=None):
+def _get_in_out_frame(it, range_to_read):
     in_frame = out_frame = None
 
@@ -385,10 +379,11 @@
 
     if not in_frame and not out_frame:
-        rate = seq_rate if seq_rate is not None else range_to_read.duration.rate
+        # because OTIO has no global concept of FPS, the rate of the duration
+        # is used as the rate for the range of the source.
         in_frame = otio.opentime.to_frames(
-            range_to_read.start_time.rescaled_to(rate), rate=rate
+            range_to_read.start_time, rate=range_to_read.duration.rate
         )
         out_frame = otio.opentime.to_frames(
-            range_to_read.end_time_inclusive().rescaled_to(rate), rate=rate
+            range_to_read.end_time_inclusive(), rate=range_to_read.duration.rate
         )
     return (in_frame, out_frame)