diff --git a/test/pc/e2e/analyzer/video/single_process_encoded_image_data_injector.cc b/test/pc/e2e/analyzer/video/single_process_encoded_image_data_injector.cc
index f85da3786c..44c832f3eb 100644
--- a/test/pc/e2e/analyzer/video/single_process_encoded_image_data_injector.cc
+++ b/test/pc/e2e/analyzer/video/single_process_encoded_image_data_injector.cc
@@ -19,13 +19,6 @@
 
 namespace webrtc {
 namespace webrtc_pc_e2e {
-namespace {
-
-// Number of bytes from the beginning of the EncodedImage buffer that will be
-// used to store frame id and sub id.
-constexpr size_t kUsedBufferSize = 3;
-
-}  // namespace
 
 SingleProcessEncodedImageDataInjector::SingleProcessEncodedImageDataInjector() =
     default;
@@ -37,12 +30,13 @@ EncodedImage SingleProcessEncodedImageDataInjector::InjectData(
     bool discard,
     const EncodedImage& source,
     int coding_entity_id) {
-  RTC_CHECK(source.size() >= kUsedBufferSize);
+  RTC_CHECK(source.size() >= ExtractionInfo::kUsedBufferSize);
 
   ExtractionInfo info;
   info.discard = discard;
-  size_t insertion_pos = source.size() - kUsedBufferSize;
-  memcpy(info.origin_data, &source.data()[insertion_pos], kUsedBufferSize);
+  size_t insertion_pos = source.size() - ExtractionInfo::kUsedBufferSize;
+  memcpy(info.origin_data, &source.data()[insertion_pos],
+         ExtractionInfo::kUsedBufferSize);
   {
     rtc::CritScope crit(&lock_);
     // Will create new one if missed.
@@ -87,7 +81,8 @@ EncodedImageExtractionResult SingleProcessEncodedImageDataInjector::ExtractData(
   bool discard = true;
   std::vector<ExtractionInfo> extraction_infos;
   for (size_t frame_size : frame_sizes) {
-    size_t insertion_pos = prev_frames_size + frame_size - kUsedBufferSize;
+    size_t insertion_pos =
+        prev_frames_size + frame_size - ExtractionInfo::kUsedBufferSize;
     // Extract frame id from first 2 bytes starting from insertion pos.
     uint16_t next_id = buffer[insertion_pos] + (buffer[insertion_pos + 1] << 8);
     // Extract frame sub id from second 3 byte starting from insertion pos.
@@ -144,8 +139,8 @@ EncodedImageExtractionResult SingleProcessEncodedImageDataInjector::ExtractData(
       out.SetSpatialLayerFrameSize(frame_sl_index[frame_index], 0);
       size -= frame_size;
     } else {
-      memcpy(&buffer[pos + frame_size - kUsedBufferSize], info.origin_data,
-             kUsedBufferSize);
+      memcpy(&buffer[pos + frame_size - ExtractionInfo::kUsedBufferSize],
+             info.origin_data, ExtractionInfo::kUsedBufferSize);
       pos += frame_size;
     }
   }
diff --git a/test/pc/e2e/analyzer/video/single_process_encoded_image_data_injector.h b/test/pc/e2e/analyzer/video/single_process_encoded_image_data_injector.h
index c69cc9a2c0..f79532e096 100644
--- a/test/pc/e2e/analyzer/video/single_process_encoded_image_data_injector.h
+++ b/test/pc/e2e/analyzer/video/single_process_encoded_image_data_injector.h
@@ -57,13 +57,16 @@ class SingleProcessEncodedImageDataInjector : public EncodedImageDataInjector,
   // Contains data required to extract frame id from EncodedImage and restore
   // original buffer.
   struct ExtractionInfo {
+    // Number of bytes from the beginning of the EncodedImage buffer that will
+    // be used to store frame id and sub id.
+    const static size_t kUsedBufferSize = 3;
     // Frame sub id to distinguish encoded images for different spatial layers.
     uint8_t sub_id;
     // Flag to show is this encoded images should be discarded by analyzing
     // decoder because of not required spatial layer/simulcast stream.
     bool discard;
     // Data from first 3 bytes of origin encoded image's payload.
-    uint8_t origin_data[3];
+    uint8_t origin_data[ExtractionInfo::kUsedBufferSize];
   };
 
   struct ExtractionInfoVector {