VSE: Implement sanity check for files with more channels than supported

This is a follow up to 8fecc2a8525467ee2fbbaae16ddbbc10b3050d46.

This makes sure future .blend files that have more channels than the
limit won't break Blender.

It can be backported to LTS.

This is part of https://developer.blender.org/D12645

Differential Revision: https://developer.blender.org/D12648

1 files changed, 8 insertions, 0 deletions

diff --git a/source/blender/windowmanager/intern/wm_files.c b/source/blender/windowmanager/intern/wm_files.c
index bbab3a8b326..a5ebf988edd 100644
--- a/source/blender/windowmanager/intern/wm_files.c
+++ b/source/blender/windowmanager/intern/wm_files.c
@@ -871,6 +871,14 @@ static void file_read_reports_finalize(BlendFileReadReport *bf_reports)
                 bf_reports->count.linked_proxies);
   }
 
+  if (bf_reports->count.vse_strips_skipped != 0) {
+    BKE_reportf(bf_reports->reports,
+                RPT_ERROR,
+                "%d sequence strips were not read because they were in a channel larger than %d",
+                bf_reports->count.vse_strips_skipped,
+                MAXSEQ);
+  }
+
   BLI_linklist_free(bf_reports->resynced_lib_overrides_libraries, NULL);
   bf_reports->resynced_lib_overrides_libraries = NULL;
 }