fix wrong frame length

meta/episodes.jsonl

@@ -8,7 +8,7 @@
 {"episode_index": 7, "tasks": ["Move blocks one by one until all three blocks are in the tray. "], "length": 935}
 {"episode_index": 8, "tasks": ["Move blocks one by one until all three blocks are in the tray. "], "length": 733}
 {"episode_index": 9, "tasks": ["Move blocks one by one until all three blocks are in the tray. "], "length": 833}
-{"episode_index": 10, "tasks": ["Move blocks one by one until all three blocks are in the tray. "], "length": 1118}
+{"episode_index": 10, "tasks": ["Move blocks one by one until all three blocks are in the tray. "], "length": 278}
 {"episode_index": 11, "tasks": ["Move blocks one by one until all three blocks are in the tray. "], "length": 932}
 {"episode_index": 12, "tasks": ["Move blocks one by one until all three blocks are in the tray. "], "length": 684}
 {"episode_index": 13, "tasks": ["Move blocks one by one until all three blocks are in the tray. "], "length": 798}
@@ -58,7 +58,7 @@
 {"episode_index": 57, "tasks": ["Move blocks one by one until all three blocks are in the tray. "], "length": 478}
 {"episode_index": 58, "tasks": ["Move blocks one by one until all three blocks are in the tray. "], "length": 399}
 {"episode_index": 59, "tasks": ["Move blocks one by one until all three blocks are in the tray. "], "length": 359}
-{"episode_index": 60, "tasks": ["Move blocks one by one until all three blocks are in the tray. "], "length": 47}
+{"episode_index": 60, "tasks": ["Move blocks one by one until all three blocks are in the tray. "], "length": 451}
 {"episode_index": 61, "tasks": ["Move blocks one by one until all three blocks are in the tray. "], "length": 869}
 {"episode_index": 62, "tasks": ["Move blocks one by one until all three blocks are in the tray. "], "length": 545}
 {"episode_index": 63, "tasks": ["Move blocks one by one until all three blocks are in the tray. "], "length": 379}