diff --git a/src/ks-avi b/src/ks-avi
index d875fca..3d98f73 100755
--- a/src/ks-avi
+++ b/src/ks-avi
@@ -2,12 +2,27 @@
 
 ###############################################################
 # ks-avi (ks-tools) - Convert video to AVI format             #
-# Date: 04-02-2022                                            #
+# Date: 10-02-2023                                            #
 # Author: q3aql                                               #
 # Contact: q3aql@duck.com                                     #
 ###############################################################
 VERSION="8.4-dev"
-M_DATE="040222"
+M_DATE="100223"
+
+# Detect version ffmpeg for old releases
+ffmpeg_version=$(ffmpeg -version 2>&1 | grep version | head -1 | cut -d " " -f 3 | cut -d "." -f 1)
+IFS="abcdefghijklmnopqrstyvwxzABCDEFHIJKLMNOPQRSTYVWXZ@/()"
+ffmpeg_version=$(echo ${ffmpeg_version})
+IFS=""
+if [ -z "${ffmpeg_version}" ] ; then
+  video_sync="vsync"
+else
+  if [ ${ffmpeg_version} -lt 5 ] ; then
+    video_sync="vsync"
+  else
+    video_sync="fps_mode"
+  fi
+fi
 
 # Global parameters
 dirTemp="/tmp"
@@ -198,8 +213,8 @@ fi
 p_ffmpeg="ffmpeg -i"
 p_ffmpeg_patched="-max_muxing_queue_size 9999"
 # f_conversion="-vsync 1 -async 1" # Deprecated method
-#f_conversion="-fps_mode cfr -af aresample=async=1:min_hard_comp=0.100000:first_pts=0"
-f_conversion="-fps_mode cfr -af aresample=async=1"
+#f_conversion="-${video_sync} cfr -af aresample=async=1:min_hard_comp=0.100000:first_pts=0"
+f_conversion="-${video_sync} cfr -af aresample=async=1"
 # Check if video input uses H265 (HEVC)
 codec_h265=$(${p_ffmpeg} "${1}" 2>&1 | grep Stream | tr -s " " | grep "Video:" | grep "h265")
 codec_hevc=$(${p_ffmpeg} "${1}" 2>&1 | grep Stream | tr -s " " | grep "Video:" | grep "hevc")
diff --git a/src/ks-crop b/src/ks-crop
index 01d2c14..30cb3e3 100755
--- a/src/ks-crop
+++ b/src/ks-crop
@@ -2,12 +2,27 @@
 
 ###############################################################
 # ks-crop (ks-tools) - Crop or change aspect ratio of a video #
-# Date: 08-02-2023                                            #
+# Date: 10-02-2023                                            #
 # Author: q3aql                                               #
 # Contact: q3aql@duck.com                                     #
 ###############################################################
 VERSION="8.4-dev"
-M_DATE="080223"
+M_DATE="100223"
+
+# Detect version ffmpeg for old releases
+ffmpeg_version=$(ffmpeg -version 2>&1 | grep version | head -1 | cut -d " " -f 3 | cut -d "." -f 1)
+IFS="abcdefghijklmnopqrstyvwxzABCDEFHIJKLMNOPQRSTYVWXZ@/()"
+ffmpeg_version=$(echo ${ffmpeg_version})
+IFS=""
+if [ -z "${ffmpeg_version}" ] ; then
+  video_sync="vsync"
+else
+  if [ ${ffmpeg_version} -lt 5 ] ; then
+    video_sync="vsync"
+  else
+    video_sync="fps_mode"
+  fi
+fi
 
 # Global parameters
 dirTemp="/tmp"
@@ -137,8 +152,8 @@ function errorReadingFile() {
 p_ffmpeg="ffmpeg -i"
 p_ffmpeg_patched="-max_muxing_queue_size 9999"
 # f_conversion="-vsync 1 -async 1" # Deprecated method
-f_conversion="-fps_mode cfr"
-f_conversion_crop="-fps_mode cfr -async 1"
+f_conversion="-${video_sync} cfr"
+f_conversion_crop="-${video_sync} cfr -async 1"
 # Check if video input uses H265 (HEVC)
 codec_h265=$(${p_ffmpeg} "${2}" 2>&1 | grep Stream | tr -s " " | grep "Video:" | grep "h265")
 codec_hevc=$(${p_ffmpeg} "${2}" 2>&1 | grep Stream | tr -s " " | grep "Video:" | grep "hevc")
diff --git a/src/ks-mix b/src/ks-mix
index 573edfd..02d3340 100755
--- a/src/ks-mix
+++ b/src/ks-mix
@@ -2,12 +2,27 @@
 
 #####################################################################
 # ks-mix (ks-tools) - Extract video/audio and mix video/audio files #
-# Date: 08-02-2023                                                  #
+# Date: 10-02-2023                                                  #
 # Author: q3aql                                                     #
 # Contact: q3aql@duck.com                                           #
 #####################################################################
 VERSION="8.4-dev"
-M_DATE="080223"
+M_DATE="100223"
+
+# Detect version ffmpeg for old releases
+ffmpeg_version=$(ffmpeg -version 2>&1 | grep version | head -1 | cut -d " " -f 3 | cut -d "." -f 1)
+IFS="abcdefghijklmnopqrstyvwxzABCDEFHIJKLMNOPQRSTYVWXZ@/()"
+ffmpeg_version=$(echo ${ffmpeg_version})
+IFS=""
+if [ -z "${ffmpeg_version}" ] ; then
+  video_sync="vsync"
+else
+  if [ ${ffmpeg_version} -lt 5 ] ; then
+    video_sync="vsync"
+  else
+    video_sync="fps_mode"
+  fi
+fi
 
 # File(s) detection
 current_dir="$(pwd)"
@@ -135,7 +150,7 @@ elif [ "${1}" == "-evid" ] ; then
     echo -n "* Starting extract video track (${2}) "
     sleep 3
     ffmpeg -y -i "${2}" -map ${video_track} -c:v copy "${current_dir}/seeing.mp4"
-    ffmpeg -y -i "${current_dir}/seeing.mp4" -map 0:0 -fps_mode cfr -c:v copy "${video_file_dir}"
+    ffmpeg -y -i "${current_dir}/seeing.mp4" -map 0:0 -${video_sync} cfr -c:v copy "${video_file_dir}"
     echo ""
     echo -n "* Extracted video into ${video_file_dir}"
     sleep 2
@@ -208,7 +223,7 @@ elif [ "${1}" == "-ev25" ] ; then
     if [ "${codec_encoded}" == "h264_encoded" ] ; then
       ffmpeg -y -i "${2}" -map ${video_track} -c copy -f h264 "${current_dir}/seeing_noaudio.h264"
       ffmpeg -y -r 25 -i "${current_dir}/seeing_noaudio.h264" -c copy "${current_dir}/seeing.mp4"
-      ffmpeg -y -i "${current_dir}/seeing.mp4" -map 0:0 -fps_mode cfr -c:v copy "${video_file_dir}"
+      ffmpeg -y -i "${current_dir}/seeing.mp4" -map 0:0 -${video_sync} cfr -c:v copy "${video_file_dir}"
       echo ""
       echo -n "* Extracted video into ${video_file_dir} (25 fps)"
       sleep 2
@@ -221,7 +236,7 @@ elif [ "${1}" == "-ev25" ] ; then
       ffmpeg -y -i "${current_dir}/temp-h265.mkv" -c copy -f h264 "${current_dir}/seeing_noaudio.h264"
       rm -rf "${current_dir}/temp-h265.mkv"
       ffmpeg -y -r 25 -i "${current_dir}/seeing_noaudio.h264" -c copy "${current_dir}/seeing.mp4"
-      ffmpeg -y -i "${current_dir}/seeing.mp4" -map 0:0 -fps_mode cfr -c:v copy "${video_file_dir}"
+      ffmpeg -y -i "${current_dir}/seeing.mp4" -map 0:0 -${video_sync} cfr -c:v copy "${video_file_dir}"
       echo ""
       echo -n "* Extracted video into ${video_file_dir} (25 fps)"
       sleep 2
@@ -235,7 +250,7 @@ elif [ "${1}" == "-ev25" ] ; then
       ffmpeg -y -i "${current_dir}/temp-h265.mkv" -c copy -f h264 "${current_dir}/seeing_noaudio.h264"
       rm -rf "${current_dir}/temp-h265.mkv"
       ffmpeg -y -r 25 -i "${current_dir}/seeing_noaudio.h264" -c copy "${current_dir}/seeing.mp4"
-      ffmpeg -y -i "${current_dir}/seeing.mp4" -map 0:0 -fps_mode cfr -c:v copy "${video_file_dir}"
+      ffmpeg -y -i "${current_dir}/seeing.mp4" -map 0:0 -${video_sync} cfr -c:v copy "${video_file_dir}"
       echo ""
       echo -n "* Extracted video into ${video_file_dir} (25 fps)"
       sleep 2
@@ -248,7 +263,7 @@ elif [ "${1}" == "-ev25" ] ; then
       ffmpeg -y -i "${current_dir}/temp-mpeg4.mkv" -c copy -f h264 "${current_dir}/seeing_noaudio.h264"
       rm -rf "${current_dir}/temp-mpeg4.mkv"
       ffmpeg -y -r 25 -i "${current_dir}/seeing_noaudio.h264" -c copy "${current_dir}/seeing.mp4"
-      ffmpeg -y -i "${current_dir}/seeing.mp4" -map 0:0 -fps_mode cfr -c:v copy "${video_file_dir}"
+      ffmpeg -y -i "${current_dir}/seeing.mp4" -map 0:0 -${video_sync} cfr -c:v copy "${video_file_dir}"
       echo ""
       echo -n "* Extracted video into ${video_file_dir} (25 fps)"
       sleep 2
@@ -330,7 +345,7 @@ elif [ "${1}" == "-evpf" ] ; then
     if [ "${codec_encoded}" == "h264_encoded" ] ; then
       ffmpeg -y -i "${2}" -map ${video_track} -c copy -f h264 "${current_dir}/seeing_noaudio.h264"
       ffmpeg -y -r ${frames_default} -i "${current_dir}/seeing_noaudio.h264" -c copy "${current_dir}/seeing.mp4"
-      ffmpeg -y -i "${current_dir}/seeing.mp4" -map 0:0 -fps_mode cfr -c:v copy "${video_file_dir}"
+      ffmpeg -y -i "${current_dir}/seeing.mp4" -map 0:0 -${video_sync} cfr -c:v copy "${video_file_dir}"
       echo ""
       echo -n "* Extracted video into ${video_file_dir} (25 fps)"
       sleep 2
@@ -343,7 +358,7 @@ elif [ "${1}" == "-evpf" ] ; then
       ffmpeg -y -i "${current_dir}/temp-h265.mkv" -c copy -f h264 "${current_dir}/seeing_noaudio.h264"
       rm -rf "${current_dir}/temp-h265.mkv"
       ffmpeg -y -r ${frames_default} -i "${current_dir}/seeing_noaudio.h264" -c copy "${current_dir}/seeing.mp4"
-      ffmpeg -y -i "${current_dir}/seeing.mp4" -map 0:0 -fps_mode cfr -c:v copy "${video_file_dir}"
+      ffmpeg -y -i "${current_dir}/seeing.mp4" -map 0:0 -${video_sync} cfr -c:v copy "${video_file_dir}"
       echo ""
       echo -n "* Extracted video into ${video_file_dir} (25 fps)"
       sleep 2
@@ -357,7 +372,7 @@ elif [ "${1}" == "-evpf" ] ; then
       ffmpeg -y -i "${current_dir}/temp-h265.mkv" -c copy -f h264 "${current_dir}/seeing_noaudio.h264"
       rm -rf "${current_dir}/temp-h265.mkv"
       ffmpeg -y -r 25 -i "${current_dir}/seeing_noaudio.h264" -c copy "${current_dir}/seeing.mp4"
-      ffmpeg -y -i "${current_dir}/seeing.mp4" -map 0:0 -fps_mode cfr -c:v copy "${video_file_dir}"
+      ffmpeg -y -i "${current_dir}/seeing.mp4" -map 0:0 -${video_sync} cfr -c:v copy "${video_file_dir}"
       echo ""
       echo -n "* Extracted video into ${video_file_dir} (25 fps)"
       sleep 2
@@ -370,7 +385,7 @@ elif [ "${1}" == "-evpf" ] ; then
       ffmpeg -y -i "${current_dir}/temp-mpeg4.mkv" -c copy -f h264 "${current_dir}/seeing_noaudio.h264"
       rm -rf "${current_dir}/temp-mpeg4.mkv"
       ffmpeg -y -r ${frames_default} -i "${current_dir}/seeing_noaudio.h264" -c copy "${current_dir}/seeing.mp4"
-      ffmpeg -y -i "${current_dir}/seeing.mp4" -map 0:0 -fps_mode cfr -c:v copy "${video_file_dir}"
+      ffmpeg -y -i "${current_dir}/seeing.mp4" -map 0:0 -${video_sync} cfr -c:v copy "${video_file_dir}"
       echo ""
       echo -n "* Extracted video into ${video_file_dir} (25 fps)"
       sleep 2
@@ -613,7 +628,7 @@ elif [ "${1}" == "-evti" ] ; then
       echo -n "* Starting extract video track (${2}) "
       sleep 3
       ffmpeg -y -i "${2}" -map ${video_track} -c:v copy -ss ${hourCut}:${minuteCut}:${secondCut} "${current_dir}/seeing.mp4"
-      ffmpeg -y -i "${current_dir}/seeing.mp4" -map 0:0 -fps_mode cfr -c:v copy "${video_file_dir}"
+      ffmpeg -y -i "${current_dir}/seeing.mp4" -map 0:0 -${video_sync} cfr -c:v copy "${video_file_dir}"
       echo ""
       echo -n "* Extracted video into ${video_file_dir}"
       sleep 2
@@ -723,7 +738,7 @@ elif [ "${1}" == "-evti" ] ; then
         echo -n "* Starting extract video track (${2}) "
         sleep 3
         ffmpeg -y -i "${2}" -map ${video_track} -c:v copy -ss ${hourCut}:${minuteCut}:${secondCut} -t ${hourCutAfter}:${minuteCutAfter}:${secondCutAfter} "${current_dir}/seeing.mp4"
-        ffmpeg -y -i "${current_dir}/seeing.mp4" -map 0:0 -fps_mode cfr -c:v copy "${video_file_dir}"
+        ffmpeg -y -i "${current_dir}/seeing.mp4" -map 0:0 -${video_sync} cfr -c:v copy "${video_file_dir}"
         echo ""
         echo -n "* Extracted video into ${video_file_dir}"
         sleep 2
diff --git a/src/ks-mp4 b/src/ks-mp4
index 94f0ba3..76d7f30 100755
--- a/src/ks-mp4
+++ b/src/ks-mp4
@@ -2,12 +2,27 @@
 
 ###############################################################
 # ks-mp4 (ks-tools) - Convert video to MP4 format             #
-# Date: 08-02-2023                                            #
+# Date: 10-02-2023                                            #
 # Author: q3aql                                               #
 # Contact: q3aql@duck.com                                     #
 ###############################################################
 VERSION="8.4-dev"
-M_DATE="080223"
+M_DATE="100223"
+
+# Detect version ffmpeg for old releases
+ffmpeg_version=$(ffmpeg -version 2>&1 | grep version | head -1 | cut -d " " -f 3 | cut -d "." -f 1)
+IFS="abcdefghijklmnopqrstyvwxzABCDEFHIJKLMNOPQRSTYVWXZ@/()"
+ffmpeg_version=$(echo ${ffmpeg_version})
+IFS=""
+if [ -z "${ffmpeg_version}" ] ; then
+  video_sync="vsync"
+else
+  if [ ${ffmpeg_version} -lt 5 ] ; then
+    video_sync="vsync"
+  else
+    video_sync="fps_mode"
+  fi
+fi
 
 # Global parameters
 dirTemp="/tmp"
@@ -198,8 +213,8 @@ fi
 p_ffmpeg="ffmpeg -i"
 p_ffmpeg_patched="-max_muxing_queue_size 9999"
 # f_conversion="-vsync 1 -async 1" # Deprecated method
-#f_conversion="-fps_mode cfr -af aresample=async=1:min_hard_comp=0.100000:first_pts=0"
-f_conversion="-fps_mode cfr -af aresample=async=1"
+#f_conversion="-${video_sync} cfr -af aresample=async=1:min_hard_comp=0.100000:first_pts=0"
+f_conversion="-${video_sync} cfr -af aresample=async=1"
 # Check if video input uses H265 (HEVC)
 codec_h265=$(${p_ffmpeg} "${1}" 2>&1 | grep Stream | tr -s " " | grep "Video:" | grep "h265")
 codec_hevc=$(${p_ffmpeg} "${1}" 2>&1 | grep Stream | tr -s " " | grep "Video:" | grep "hevc")
diff --git a/src/ks-mp4k b/src/ks-mp4k
index a8c8062..e3122c7 100755
--- a/src/ks-mp4k
+++ b/src/ks-mp4k
@@ -2,12 +2,27 @@
 
 ###############################################################
 # ks-mp4k (ks-tools) - Convert video to MP4 format (4K)       #
-# Date: 08-02-2023                                            #
+# Date: 10-02-2023                                            #
 # Author: q3aql                                               #
 # Contact: q3aql@duck.com                                     #
 ###############################################################
 VERSION="8.4-dev"
-M_DATE="080223"
+M_DATE="100223"
+
+# Detect version ffmpeg for old releases
+ffmpeg_version=$(ffmpeg -version 2>&1 | grep version | head -1 | cut -d " " -f 3 | cut -d "." -f 1)
+IFS="abcdefghijklmnopqrstyvwxzABCDEFHIJKLMNOPQRSTYVWXZ@/()"
+ffmpeg_version=$(echo ${ffmpeg_version})
+IFS=""
+if [ -z "${ffmpeg_version}" ] ; then
+  video_sync="vsync"
+else
+  if [ ${ffmpeg_version} -lt 5 ] ; then
+    video_sync="vsync"
+  else
+    video_sync="fps_mode"
+  fi
+fi
 
 # Global parameters
 dirTemp="/tmp"
@@ -198,8 +213,8 @@ fi
 p_ffmpeg="ffmpeg -i"
 p_ffmpeg_patched="-max_muxing_queue_size 9999"
 # f_conversion="-vsync 1 -async 1" # Deprecated method
-#f_conversion="-fps_mode cfr -af aresample=async=1:min_hard_comp=0.100000:first_pts=0"
-f_conversion="-fps_mode cfr -af aresample=async=1"
+#f_conversion="-${video_sync} cfr -af aresample=async=1:min_hard_comp=0.100000:first_pts=0"
+f_conversion="-${video_sync} cfr -af aresample=async=1"
 # Check if video input uses H265 (HEVC)
 codec_h265=$(${p_ffmpeg} "${1}" 2>&1 | grep Stream | tr -s " " | grep "Video:" | grep "h265")
 codec_hevc=$(${p_ffmpeg} "${1}" 2>&1 | grep Stream | tr -s " " | grep "Video:" | grep "hevc")
diff --git a/src/ks-mp4s b/src/ks-mp4s
index 392b94f..a5df4bc 100755
--- a/src/ks-mp4s
+++ b/src/ks-mp4s
@@ -2,12 +2,27 @@
 
 ###############################################################
 # ks-mp4s (ks-tools) - Convert video to MP4 format (Series)   #
-# Date: 08-02-2023                                            #
+# Date: 10-02-2023                                            #
 # Author: q3aql                                               #
 # Contact: q3aql@duck.com                                     #
 ###############################################################
 VERSION="8.4-dev"
-M_DATE="080223"
+M_DATE="100223"
+
+# Detect version ffmpeg for old releases
+ffmpeg_version=$(ffmpeg -version 2>&1 | grep version | head -1 | cut -d " " -f 3 | cut -d "." -f 1)
+IFS="abcdefghijklmnopqrstyvwxzABCDEFHIJKLMNOPQRSTYVWXZ@/()"
+ffmpeg_version=$(echo ${ffmpeg_version})
+IFS=""
+if [ -z "${ffmpeg_version}" ] ; then
+  video_sync="vsync"
+else
+  if [ ${ffmpeg_version} -lt 5 ] ; then
+    video_sync="vsync"
+  else
+    video_sync="fps_mode"
+  fi
+fi
 
 # Global parameters
 dirTemp="/tmp"
@@ -198,8 +213,8 @@ fi
 p_ffmpeg="ffmpeg -i"
 p_ffmpeg_patched="-max_muxing_queue_size 9999"
 # f_conversion="-vsync 1 -async 1" # Deprecated method
-#f_conversion="-fps_mode cfr -af aresample=async=1:min_hard_comp=0.100000:first_pts=0"
-f_conversion="-fps_mode cfr -af aresample=async=1"
+#f_conversion="-${video_sync} cfr -af aresample=async=1:min_hard_comp=0.100000:first_pts=0"
+f_conversion="-${video_sync} cfr -af aresample=async=1"
 # Check if video input uses H265 (HEVC)
 codec_h265=$(${p_ffmpeg} "${1}" 2>&1 | grep Stream | tr -s " " | grep "Video:" | grep "h265")
 codec_hevc=$(${p_ffmpeg} "${1}" 2>&1 | grep Stream | tr -s " " | grep "Video:" | grep "hevc")