Release Auto Change Video v1.0

Video/graysonsolis_Auto change video.lua

@@ -0,0 +1,148 @@
+-- @description Auto change video
+-- @author Grayson Solis
+-- @version 1.0
+-- @about
+--   This script automatically “visually solos” the nearest video track (the selected track 
+--   or the closest one above) by muting all other visible video tracks in the project.
+--
+--   ----------------------------------------------------------------------------------------
+--   USE CASE
+--   ----------------------------------------------------------------------------------------
+--   Place reference videos on parent tracks and audio on children. As you select audio tracks, 
+--   the script keeps only the relevant video unmuted—ideal for syncing sound layers to video 
+--   without distraction from other clips.
+--
+--   Note: Throw this in a global startup action so you have it ready to go every time!
+--
+--   ----------------------------------------------------------------------------------------
+--   BEHAVIOR
+--   ----------------------------------------------------------------------------------------
+--   • If no track or multiple tracks are selected → does nothing  
+--   • If one track is selected →  
+--       1. Builds a list of all visible video tracks  
+--       2. Finds the video track at or above the selected track  
+--       3. Mutes every other video track, leaving only the target unmuted  
+--       4. Repeats continuously as you change selection
+
+
+----------------------------------------------------------------------------------------
+-- API CACHING FOR PERFORMANCE
+----------------------------------------------------------------------------------------
+local GetTrack              = reaper.GetTrack
+local GetParentTrack        = reaper.GetParentTrack
+local GetMediaTrackInfo     = reaper.GetMediaTrackInfo_Value
+local CountTracks           = reaper.CountTracks
+local CountMediaItems       = reaper.CountTrackMediaItems
+local GetMediaItem          = reaper.GetTrackMediaItem
+local GetTake               = reaper.GetActiveTake
+local GetSource             = reaper.GetMediaItemTake_Source
+local GetSourceType         = reaper.GetMediaSourceType
+local SetItemMute           = reaper.SetMediaItemInfo_Value
+local PreventUIRefresh      = reaper.PreventUIRefresh
+local defer                 = reaper.defer
+
+----------------------------------------------------------------------------------------
+-- HELPER: IS TRACK VISIBLE? (NOT IN A COLLAPSED FOLDER)
+----------------------------------------------------------------------------------------
+local function isVisible(tr)
+  while tr do
+    tr = GetParentTrack(tr)
+    if tr and GetMediaTrackInfo(tr, "I_FOLDERCOMPACT") == 1 then 
+      return false 
+    end
+  end
+  return true
+end
+
+----------------------------------------------------------------------------------------
+-- HELPER: COLLECT VISIBLE VIDEO TRACKS
+----------------------------------------------------------------------------------------
+local function collectVideoTracks(tbl)
+  for i = 0, CountTracks(0) - 1 do
+    local tr = GetTrack(0, i)
+    if isVisible(tr) then
+      for j = 0, CountMediaItems(tr) - 1 do
+        local take = GetTake(GetMediaItem(tr, j))
+        if take and GetSourceType(GetSource(take), "") == "VIDEO" then
+          tbl[#tbl + 1] = { track = tr, idx = i }
+          break  -- one video item per track is enough
+        end
+      end
+    end
+  end
+end
+
+----------------------------------------------------------------------------------------
+-- HELPER: MUTE/UNMUTE ALL VIDEO ITEMS ON A TRACK
+----------------------------------------------------------------------------------------
+local function processTrack(tr, mute)
+  for j = 0, CountMediaItems(tr) - 1 do
+    local item = GetMediaItem(tr, j)
+    local take = GetTake(item)
+    if take and GetSourceType(GetSource(take), "") == "VIDEO" then
+      SetItemMute(item, "B_MUTE", mute and 1 or 0)
+    end
+  end
+end
+
+----------------------------------------------------------------------------------------
+-- STATE & CACHE
+----------------------------------------------------------------------------------------
+local last_idx = -1  -- previous selection index
+local vids     = {}  -- cache of video track entries
+
+----------------------------------------------------------------------------------------
+-- MAIN LOOP FUNCTION
+----------------------------------------------------------------------------------------
+local function main()
+  -- 1. Only proceed with exactly one selected track
+  local sel = reaper.GetSelectedTrack(0, 0)
+  if not sel or reaper.CountSelectedTracks(0) > 1 then
+    defer(main)
+    return
+  end
+
+  -- 2. Get zero-based index of selected track
+  local sel_idx = GetMediaTrackInfo(sel, "IP_TRACKNUMBER") - 1
+
+  -- 3. If selection changed, rebuild and apply mutes
+  if sel_idx ~= last_idx then
+    last_idx = sel_idx
+    vids = {}
+    collectVideoTracks(vids)
+
+    -- 4. Find target (equal or next highest)
+    local target_idx
+    for _, v in ipairs(vids) do
+      if v.idx == sel_idx then
+        target_idx = sel_idx
+        break
+      end
+    end
+    if not target_idx then
+      for i = #vids, 1, -1 do
+        if vids[i].idx < sel_idx then
+          target_idx = vids[i].idx
+          break
+        end
+      end
+    end
+
+    -- 5. Mute/unmute all video tracks
+    if target_idx then
+      PreventUIRefresh(1)
+      for _, v in ipairs(vids) do
+        processTrack(v.track, v.idx ~= target_idx)
+      end
+      PreventUIRefresh(-1)
+    end
+  end
+
+  -- 6. Loop
+  defer(main)
+end
+
+----------------------------------------------------------------------------------------
+-- START SCRIPT
+----------------------------------------------------------------------------------------
+defer(main)