diff --git a/render-chunks.sh b/render-chunks.sh
index 5089e5a..d203f04 100755
--- a/render-chunks.sh
+++ b/render-chunks.sh
@@ -53,9 +53,32 @@ convert_image_to_video() {
     local fade_in="$4"
     local fade_out="$5"
 
-    ffmpeg -loop 1 -t "$duration" -i "$image_file" -f lavfi -i anullsrc=r=48000:cl=stereo \
-        -vf "fade=t=in:st=0:d=$fade_in,fade=t=out:st=$(($duration - $fade_out)):d=$fade_out,format=yuv420p" \
-        -r 50 -c:v libx264 -c:a aac -b:a 192k -t "$duration" "$output_video"
+    if [[ $fade_in == 0 ]]
+    then
+        ffmpeg -loop 1 \
+            -framerate 50 \
+            -t "$duration" \
+            -i "$image_file" -f lavfi \
+            -i anullsrc=r=48000:cl=stereo \
+            -vf "fade=t=out:st=$(($duration - $fade_out)):d=$fade_out,format=pix_fmts=yuv420p,fps=50" \
+            -c:a aac -b:a 192k \
+            -c:v libx264 -threads 0 -pix_fmt yuv420p -crf 18 \
+            -profile:v high -level 4.1 -disposition default -color_range tv \
+            -metadata:s:a:0 language=native \
+            -t "$duration" "$output_video"
+    else
+        ffmpeg -loop 1 \
+            -framerate 50 \
+            -t "$duration" \
+            -i "$image_file" -f lavfi \
+            -i anullsrc=r=48000:cl=stereo \
+            -filter_complex "fade=t=in:st=0:d=$fade_in,format=pix_fmts=yuv420p,fps=50" \
+            -c:a aac -b:a 192k \
+            -c:v libx264 -threads 0 -pix_fmt yuv420p -crf 18 \
+            -profile:v high -level 4.1 -disposition default -color_range tv \
+            -metadata:s:a:0 language=native \
+            -t "$duration" "$output_video"
+    fi
 }
 
 
@@ -104,7 +127,7 @@ I will be rendering with the following configuration:
     + Video Chunks:
         + First chunk: ${CHUNKS_ARRAY[0]}
           Starting at second ${START_OFFSET}
-        + Last chunk: ${CHUNKS_ARRAY[-1]}
+        + Last chunk: ${CHUNKS_ARRAY[$((${#CHUNKS_ARRAY[@]} - 1))]}
           Ending at second ${END_OFFSET}
         + All chunks:
 EOT
@@ -137,39 +160,64 @@ function finish {
 trap finish EXIT
 
 # STEP 2
-# introfile with first chunk and crossfade encode
+# Dauer des Intros ermitteln
+echo "==== STEP 2 ===="
+DURATION_INTRO=$(ffprobe -i "$SELECTED_INTRO" -show_entries format=duration -v quiet -of csv="p=0")
+
+# Sicherstellen, dass die Dauer gültig ist
+if [[ -z "$DURATION_INTRO" || "$DURATION_INTRO" == "N/A" ]]; then
+    echo "Fehler: Die Dauer des Intros konnte nicht ermittelt werden."
+    exit 1
+fi
+
+# Offset berechnen und negative Werte verhindern
+OFFSET=$(echo "scale=2; $DURATION_INTRO - 0.5" | bc)
+if (( $(echo "$OFFSET < 0" | bc -l) )); then OFFSET=0; fi
+
+# Prüfen, ob CHUNKS_ARRAY existiert und nicht leer ist
+if [[ -z "${CHUNKS_ARRAY[0]}" ]]; then
+    echo "Fehler: CHUNKS_ARRAY ist leer oder nicht definiert."
+    exit 1
+fi
+
+CROSSFADE_DURATION="0.5"
+
+# Intro mit Crossfade zum ersten Chunk
 ffmpeg -i "$SELECTED_INTRO" -ss "$START_OFFSET" -i "${CHUNKS_ARRAY[0]}" \
 -filter_complex \
-"[1:v:0]fade=t=in:st=0:d=0.2[x];
- [1:a:0]afade=t=in:st=0:d=0.2[a];
- [0:v:0][0:a:0]
- [x][a]
- concat=n=2:v=1:a=1
- [v0][a0]" \
--map '[v0]' -map '[a0]' \
+"[0:v:0]format=pix_fmts=yuv420p,fps=50[va]; \
+ [1:v:0]format=pix_fmts=yuv420p,fps=50[vb]; \
+ [va][vb]xfade=transition=fade:duration=${CROSSFADE_DURATION}:offset=${OFFSET}[v]; \
+ [1:a:0]afade=t=in:st=0:d=${CROSSFADE_DURATION}[a]; \
+ [0:a:0][a]concat=n=2:v=0:a=1[a0]" \
+-map '[v]' -map '[a0]' \
 -c:a aac -b:a 192k \
--c:v libx264 -threads 0 -pix_fmt yuv420p -crf 18 -profile:v high -level 4.1 -disposition default \
+-c:v libx264 -threads 4 -pix_fmt yuv420p -crf 18 -profile:v high -level 4.1 -disposition default \
+-movflags +faststart \
 -metadata:s:a:0 language=native \
 "${WORKDIR}/introcombined.mkv"
 
 # STEP 3
-# outrofile with last chunk and corssface encode
-ffmpeg -i "$SELECTED_OUTRO" -t "$END_OFFSET" -i "${CHUNKS_ARRAY[-1]}" \
+# Outro mit Crossfade vom letzten Chunk
+echo "==== STEP 3 ===="
+FOO=$(echo "${END_OFFSET} - ${CROSSFADE_DURATION}" | bc)
+ffmpeg -i "$SELECTED_OUTRO" -t "$END_OFFSET" -i "${CHUNKS_ARRAY[$((${#CHUNKS_ARRAY[@]} - 1))]}" \
 -filter_complex \
-"[1:v:0]fade=t=out:st=$(($END_OFFSET - 1)):d=1.0[x];
- [1:a:0]afade=t=out:st=$(($END_OFFSET - 1)):d=1.0[a];
- [x][a]
- [0:v:0][0:a:0]
- concat=n=2:v=1:a=1
- [v0][a0]" \
--map '[v0]' -map '[a0]' \
+"[1:v:0]format=pix_fmts=yuv420p,fps=50[v1]; \
+ [0:v:0]format=pix_fmts=yuv420p,fps=50[v0]; \
+ [v1][v0]xfade=transition=fade:duration=${CROSSFADE_DURATION}:offset=${FOO}[v]; \
+ [1:a:0]afade=t=out:st=${FOO}:d=${CROSSFADE_DURATION}[a1]; \
+ [0:a:0]afade=t=in:st=0:d=${CROSSFADE_DURATION}[a0]; \
+ [a1][a0]acrossfade=d=1[a]" \
+-map "[v]" -map "[a]" \
 -c:a aac -b:a 192k \
 -c:v libx264 -threads 0 -pix_fmt yuv420p -crf 18 -profile:v high -level 4.1 -disposition default \
 -metadata:s:a:0 language=native \
 "${WORKDIR}/outrocombined.mkv"
 
 # STEP 4
-# encoded intro+outro and all chunks in between with c:v copy and audio dynnorm + encode
+# Encoded intro+outro und alle Chunks in between mit c:v copy und audio dynnorm + encode
+echo "==== STEP 4 ===="
 
 CHUNKLIST="${WORKDIR}/chunklist.txt"