diff --git a/README.md b/README.md
index ec8cbc2..6ff3b12 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ This tool requires the two input videos, the one where you want to add the addit
 It then tries to find the exact same frame in both videos, in order to synchronize them (in case one of them is longer or shorter than the other).  
 It allows you to pick the audio and subtitle tracks you want to add to the destination and specify the output file.
 
-There's an interactive mode (simply don't pass any arguments, flags work) and a CLI mode (pass the two arguments listed at the top).
+There's an interactive mode (simply don't pass any arguments, flags are fine) and a CLI mode (pass the two arguments listed at the top).
 
 ## Examples
 
@@ -44,20 +44,21 @@ $ video-sync -h # help page
 
 - `-s, --subsTracks=<list>` subtitle tracks to sync over to the destination video. comma-separated list of mkvmerge IDs or ISO 639-2 language tags (track matching that language will be synced). if omitted, all subtitle tracks will be synced
 
+- `-g, --algorithm=<simple|matching-scene>` [default: matching-scene] search algorithm to use for video syncing
+
 - `-e, --offsetEstimate=<number>` estimated offset between the two videos (in ms) for video syncing. positive values means that the source video is ahead of the destination video
 
 - `-f, --forceOffset` use the estimated offset as the final offset, no synching
 
-- `-x, --exclusiveDirection=<ahead|behind>` only search the matching frame offset in one direction. 'ahead' means that the source video scene comes *before* the destination video scene. (requires algorithm=matching-scene)
-
-- `-g, --algorithm=<simple|matching-scene>` [default: matching-scene] search algorithm to use for video syncing
-
 - `-m, --maxOffset=<number>` [default: 120] maximum considered offset between the videos (in seconds) for video syncing.
 
-- `-r, --searchResolution=<number>` [default: 80] resolution of the search region (in frames) for video syncing. increases accuracy at the cost of longer runtime (requires algorithm=simple)
+- `--searchIncrements=<number>` [default: 3] maximum area (video duration, in seconds) to search for the next scene in any direction (forward/backward) before searching in the other direction (requires algorithm=matching-scene)
+- `--sceneSearchDuration=<number>` [default: 300] maximum area (video duration, in seconds) to search for any "abrupt" scene change in the destination video before aborting (requires algorithm=matching-scene)
+- `-x, --exclusiveDirection=<ahead|behind>` only search the matching frame offset in one direction. 'ahead' means that the source video scene comes *before* the destination video scene. (requires algorithm=matching-scene)
+
 - `-i, --iterations=<number>` [default: 2] number of iterations to perform for video syncing (requires algorithm=simple)
 - `-t, --threshold=<number>` [default: 0.6] minimum confidence threshold for video syncing. (requires algorithm=simple)
-- `-w, --searchWidth=<number>` [default: 20] width of the search region (in seconds) for video syncing. the program will find the closest matching frame in this region, 'sourceOffset' being the center (requires algorithm=simple)
+- `-r, --searchResolution=<number>` [default: 80] resolution of the search region (in frames) for video syncing. increases accuracy at the cost of longer runtime (requires algorithm=simple)
 
 - `-y, --confirm` automatically confirm missing tracks, low confidence scores, warped videos and overwrite prompts
 
diff --git a/src/index.js b/src/index.js
index ed1f3d4..91bb7a7 100644
--- a/src/index.js
+++ b/src/index.js
@@ -78,8 +78,17 @@ class VideoSyncCommand extends Command {
       }
 
     }
+
+    console.debug(`answers.source:`, answers.source)
+    console.debug(`answers.destination:`, answers.destination)
     
     let availableTracks = tracks.getTrackInfo(answers.source)
+
+    //TODO compare video duration and print warning/prompt if they are too different
+    // let video1Data = await ffprobe(video1)
+    // let video2Data = await ffprobe(video2)
+    // let video1Duration = Number(video1Data.format.duration) * 1000 // offset in ms
+    // let video2Duration = Number(video2Data.format.duration) * 1000 // offset in ms
     
     let selectedTracks
     
@@ -220,7 +229,6 @@ class VideoSyncCommand extends Command {
         result = await calcOffset(answers.destination, answers.source, {
           comparisonAlgorithm: ALGORITHMS.SSIM,
           iterations: flags.iterations,
-          searchWidth: flags.searchWidth,
           searchResolution: flags.searchResolution,
           maxOffset: flags.maxOffset,
           offsetEstimate: flags.offsetEstimate,
@@ -230,6 +238,8 @@ class VideoSyncCommand extends Command {
         result = await calculateOffset(answers.destination, answers.source, {
           maxOffset: flags.maxOffset * 1000,
           offsetEstimate: flags.offsetEstimate,
+          searchLengthInSeconds: flags.sceneSearchDuration,
+          searchIncrementSizeInSeconds: flags.searchIncrements,
         })
       }
 
@@ -287,10 +297,10 @@ class VideoSyncCommand extends Command {
 }
 
 VideoSyncCommand.description = `video-sync - a tool for automating the process of muxing additional audio tracks into videos
-This tool requires the two input videos, the one where you want to add the additional tracks *to* (the destination video) and the one where you take the additional tracks *from* (the source video).
+This tool requires two input videos, one where you want to add the additional tracks *to* (the destination video) and one where you take the additional tracks *from* (the source video).
 It then tries to find the exact same frame in both videos, in order to synchronize them (in case one of them is longer or shorter than the other).
 It allows you to pick the audio and subtitle tracks you want to add to the destination and specify the output file.
-There's an interactive mode (simply don't pass any arguments, flags work) and a CLI mode (pass the two arguments listed at the top).
+There's an interactive mode (simply don't pass any arguments, flags are fine) and a CLI mode (pass the two arguments listed at the top).
 `
 
 VideoSyncCommand.args = [
@@ -314,12 +324,6 @@ VideoSyncCommand.flags = {
     description: `output file path`,
     required: false, // if omitted, only the offset is printed
   }),
-  confirm: flags.boolean({
-    char: `y`,
-    description: `automatically confirm missing tracks, low confidence scores, warped videos and overwrite prompts`,
-    required: false, // if omitted, only the offset is printed
-    default: false,
-  }),
   audioTracks: flags.string({
     char: `a`,
     multiple: true, // important to allow spaces in-between
@@ -340,21 +344,6 @@ VideoSyncCommand.flags = {
     options: [`simple`, `matching-scene`],
     default: `matching-scene`,
   }),
-  iterations: flags.integer({
-    char: `i`,
-    description: `number of iterations to perform for video syncing (requires algorithm=simple)`,
-    default: 2,
-  }),
-  searchWidth: flags.integer({
-    char: `w`,
-    description: `width of the search region (in seconds) for video syncing. the program will find the closest matching frame in this region, 'sourceOffset' being the center (requires algorithm=simple)`,
-    default: 20,
-  }),
-  maxOffset: flags.integer({
-    char: `m`,
-    description: `maximum considered offset between the videos (in seconds) for video syncing.`,
-    default: 120,
-  }),
   offsetEstimate: flags.integer({
     char: `e`,
     description: `estimated offset between the two videos (in ms) for video syncing. positive values means that the source video is ahead of the destination video`,
@@ -365,12 +354,30 @@ VideoSyncCommand.flags = {
     description: `use the estimated offset as the final offset, no synching`,
     default: false,
   }),
+  maxOffset: flags.integer({
+    char: `m`,
+    description: `maximum considered offset between the videos (in seconds) for video syncing.`,
+    default: 120,
+  }),
+  searchIncrements: flags.integer({
+    description: `maximum area (video duration, in seconds) to search for the next scene in any direction (forward/backward) before searching in the other direction (requires algorithm=matching-scene)`,
+    default: 3,
+  }),
+  sceneSearchDuration: flags.integer({
+    description: `maximum area (video duration, in seconds) to search for any "abrupt" scene change in the destination video before aborting (requires algorithm=matching-scene)`,
+    default: 300,
+  }),
   exclusiveDirection: flags.string({
     char: `x`,
     description: `only search the matching frame offset in one direction. 'ahead' means that the source video scene comes *before* the destination video scene. (requires algorithm=matching-scene)`,
     parse: (input) => input ? (input === `ahead` ? -1 : 1) : false,
     default: undefined,
   }),
+  iterations: flags.integer({
+    char: `i`,
+    description: `number of iterations to perform for video syncing (requires algorithm=simple)`,
+    default: 2,
+  }),
   threshold: flags.string({
     char: `t`,
     description: `minimum confidence threshold for video syncing. (requires algorithm=simple)`,
@@ -382,6 +389,12 @@ VideoSyncCommand.flags = {
     description: `resolution of the search region (in frames) for video syncing. increases accuracy at the cost of longer runtime (requires algorithm=simple)`,
     default: 80,
   }),
+  confirm: flags.boolean({
+    char: `y`,
+    description: `automatically confirm missing tracks, low confidence scores, warped videos and overwrite prompts`,
+    required: false, // if omitted, only the offset is printed
+    default: false,
+  }),
   verbose: flags.boolean({
     char: `v`,
     description: `output additional logs`,
diff --git a/util/calc-offset.js b/util/calc-offset.js
index de58e9f..7dd69b8 100644
--- a/util/calc-offset.js
+++ b/util/calc-offset.js
@@ -73,7 +73,7 @@ module.exports.calcOffset = async function(video1Path, video2Path, options = {
   // const rollingFrameOffset = parseInt(video1IsLarger ? offset2 : offset1)
 
   // generate the static frame using the video length and a padding of 1%
-  console.log(`videoInfo.lengths:`, videoInfo.lengths)
+  console.debug(`videoInfo:`, videoInfo)
   let staticLength = videoInfo.lengths[video1IsLarger ? 0 : 1]
   let staticFrameOffset = Math.round(staticLength/2)
   console.log(`staticFrameOffset:`, staticFrameOffset)
@@ -108,7 +108,7 @@ module.exports.calcOffset = async function(video1Path, video2Path, options = {
     
     console.log(`iteration:`, iteration)
 
-    let searchWidth = options.searchWidth / iteration
+    let searchWidth = options.maxOffset*2 / iteration
     
     console.log(`searchWidth:`, searchWidth)
     console.log(`searchCenter:`, searchCenter)
@@ -174,10 +174,10 @@ module.exports.calcOffset = async function(video1Path, video2Path, options = {
   console.log(`searchCenter:`, searchCenter)
   
   let totalOffset = (staticFrameOffset - searchCenter).toFixed(0)
-  console.log(`Video 2 is approx. ${Math.abs(totalOffset)} ms ${video1IsLarger && totalOffset > 0 ? `ahead` : `behind`} video 1 (${closestMatch.value})`)
+  console.log(`Video 2 is approx. ${Math.abs(totalOffset)} ms ${video1IsLarger && totalOffset > 0 ? `ahead of` : `behind`} video 1 (${closestMatch.value})`)
 
   // cli.action.stop(`Done! Source video is approx. ${Math.abs(totalOffset)} ms ${video1IsLarger && totalOffset > 0 ? `ahead` : `behind`} destination video (confidence ${closestMatch.value.toFixed(5)}).`)
-  spinner.succeed(`Source video is approx. ${Math.abs(totalOffset)} ms ${video1IsLarger && totalOffset > 0 ? `ahead` : `behind`} destination video (confidence ${closestMatch.value.toFixed(5)}).`)
+  spinner.succeed(`Source video is approx. ${Math.abs(totalOffset)} ms ${video1IsLarger && totalOffset > 0 ? `ahead of` : `behind`} destination video (confidence ${closestMatch.value.toFixed(5)}).`)
   
   return {
     videoOffset: totalOffset,
@@ -192,11 +192,20 @@ async function getVideoInfo(vid1, vid2) {
   let vid2Data = await probe(vid2)
   console.log(`vid1Data:`, vid1Data)
   console.log(`vid2Data:`, vid2Data)
+  const vid1VideoStreamIndex = vid1Data.streams.findIndex(x => x.codec_type === `video`)
+  const vid2VideoStreamIndex = vid2Data.streams.findIndex(x => x.codec_type === `video`)
 
-  console.debug(`Video 1: width: ${vid1Data.streams[0].width}, height: ${vid1Data.streams[0].height}`)
-  console.debug(`Video 2: width: ${vid2Data.streams[0].width}, height: ${vid2Data.streams[0].height}`)
+  if (vid1VideoStreamIndex < 0) {
+    throw new Error(`No video stream found in '${vid1}'`)
+  }
+  if (vid2VideoStreamIndex < 0) {
+    throw new Error(`No video stream found in '${vid2}'`)
+  }
+
+  console.debug(`Video 1: width: ${vid1Data.streams[vid1VideoStreamIndex].width}, height: ${vid1Data.streams[vid1VideoStreamIndex].height}`)
+  console.debug(`Video 2: width: ${vid2Data.streams[vid2VideoStreamIndex].width}, height: ${vid2Data.streams[vid2VideoStreamIndex].height}`)
 
-  if (vid1Data.streams[0].width > vid2Data.streams[0].width && vid1Data.streams[0].height < vid2Data.streams[0].height) {
+  if (vid1Data.streams[0].width > vid2Data.streams[vid2VideoStreamIndex].width && vid1Data.streams[0].height < vid2Data.streams[vid2VideoStreamIndex].height) {
     console.warn(`Videos have different aspect ratios. You might get worse results.`)
   }
 
@@ -207,15 +216,15 @@ async function getVideoInfo(vid1, vid2) {
     ],
     dimensions: [
       {
-        width: vid1Data.streams[0].width,
-        height: vid1Data.streams[0].height,
+        width: vid1Data.streams[vid1VideoStreamIndex].width,
+        height: vid1Data.streams[vid1VideoStreamIndex].height,
       },
       {
-        width: vid2Data.streams[0].width,
-        height: vid2Data.streams[0].height,
+        width: vid2Data.streams[vid2VideoStreamIndex].width,
+        height: vid2Data.streams[vid2VideoStreamIndex].height,
       },
     ],
   }
   
 }
-module.exports.getVideoInfo = getVideoInfo
\ No newline at end of file
+module.exports.getVideoInfo = getVideoInfo
diff --git a/util/find-offset-new.js b/util/find-offset-new.js
index 7c86d02..5d8c30a 100644
--- a/util/find-offset-new.js
+++ b/util/find-offset-new.js
@@ -177,8 +177,7 @@ async function calculateOffset(video1, video2, options) {
   //TODO add support for options.offsetEstimate
   //TODO add flag to specify search direction (e.g. if known whether the source is ahead or behind the destination)
 
-  const video1SearchLength = 300 * 1000
-  const searchIncrementSize = 10000 // maximum search area to find the next scene before switching sides
+  
   const startTime = Date.now();
   const spinner = ora(`Syncing the videos...`).start();
   
@@ -188,13 +187,19 @@ async function calculateOffset(video1, video2, options) {
   } catch (err) {
     await fs.mkdir(`tmp`)
   }
-
-  // search starts upwards
-  let direction = 1
   
+  let direction = 1 // search starts upwards
   if (options.searchDirection) {
     direction = options.searchDirection
   }
+  let video1SearchLength = 300 * 1000
+  if (options.searchLengthInSeconds) {
+    video1SearchLength = options.searchLengthInSeconds * 1000
+  }
+  let searchIncrementSize = 2500 // maximum search area to find the next scene before switching sides
+  if (options.searchIncrementSizeInSeconds) {
+    searchIncrementSize = options.searchIncrementSizeInSeconds * 1000
+  }
   
   let video1Data = await ffprobe(video1)
   let video2Data = await ffprobe(video2)
@@ -223,6 +228,7 @@ async function calculateOffset(video1, video2, options) {
   
   // make sure to stay within offset bounds
   // continue while at least one side still within the bounds
+  //FIXME makes sure that a direction is blocked as soon as the max search offset is surpassed
   while (
     currentSearchOffsets.upper < video2Duration &&
     currentSearchOffsets.lower > 0 &&
@@ -288,7 +294,7 @@ async function calculateOffset(video1, video2, options) {
         videoOffset: video1SceneChange.preSceneChangeFrame.offset - sceneComparison.video2SceneChange.preSceneChangeFrame.offset,
         confidence: 1,
       }
-      spinner.succeed(`Source video is approx. ${Math.abs(result.videoOffset)} ms ${result.videoOffset > 0 ? `ahead` : `behind`} destination video. Took ${ms(Date.now() - startTime)}`)
+      spinner.succeed(`Source video is approx. ${Math.abs(result.videoOffset)} ms ${result.videoOffset > 0 ? `ahead of` : `behind`} the destination video. Took ${ms(Date.now() - startTime)}`)
       return result
       
     } else {
@@ -324,7 +330,7 @@ async function calculateOffset(video1, video2, options) {
     force: true,
   })
   
-  throw new Error(`Couldn't sync videos! (tried for ${ms(Date.now() - startTime)}`)
+  throw new Error(`Couldn't sync videos! (tried for ${ms(Date.now() - startTime)})`)
   
 }
 module.exports.calculateOffset = calculateOffset
@@ -353,4 +359,4 @@ module.exports.calculateOffset = calculateOffset
 
 //[ ] when automating, use the previously found offset as an estimate for following videos (if videos from the same source) 
 
-//[ ] what happens when there are multiple similar scene changes?
\ No newline at end of file
+//[ ] what happens when there are multiple similar scene changes?
diff --git a/util/tracks.js b/util/tracks.js
index 8cbf1f7..2ec8cfd 100644
--- a/util/tracks.js
+++ b/util/tracks.js
@@ -236,7 +236,7 @@ function getTrackInfo(video) {
         channels: track.properties[`audio_channels`],
         ids: {
           mkvmerge: track.id,
-        }
+        },
       }
     }),
     subs: subsTracks.map(track => {
@@ -246,7 +246,7 @@ function getTrackInfo(video) {
         codec: track.codec,
         ids: {
           mkvmerge: track.id,
-        }
+        },
       }
     })
   } 
@@ -270,4 +270,4 @@ function getTrackType(trackInfo) {
 
 // matchTracksAndStreams(`/mnt/c/Users/Chaphasilor/Videos/BadBatchCopy.mkv`)
 // .then(tracks => console.info(`tracks:`, tracks))
-// .catch(err => console.error(`ERROR:`, err))
\ No newline at end of file
+// .catch(err => console.error(`ERROR:`, err))
diff --git a/util/warping.js b/util/warping.js
index 62ca88f..542d26d 100644
--- a/util/warping.js
+++ b/util/warping.js
@@ -84,6 +84,8 @@ async function findClosestFrame(destinationVideo, sourceVideo, destinationTimest
         similarity,
       }
     }
+
+    await fs.rm(fullOutputPath)
     
   }
 
@@ -122,6 +124,8 @@ async function validateOffset(destinationVideo, sourceVideo, offsetToTest) {
 
   const videoInfo = await getVideoInfo(destinationVideo, sourceVideo)
 
+  console.debug(`videoInfo:`, videoInfo)
+
   const mostSimilarFrameOffsets = []
 
   for (const position of testPositions) {