diff --git a/video-convert b/video-convert
index 5291b3f..ae59ea8 100755
--- a/video-convert
+++ b/video-convert
@@ -1,11 +1,20 @@
 #!/bin/bash
 # Look into HW video encoding to vp9 instead of h264:
 # https://www.reddit.com/r/VP9/comments/g9uzzv/hardware_encoding_vp9_on_intel/
+
 fail() {
   echo "$*" >&2
   exit -1
 }
 
+VIDEO=$(getent group video | sed -E 's,^video:[^:]*:([^:]*):.*$,\1,')
+RENDER=$(getent group render | sed -E 's,^render:[^:]*:([^:]*):.*$,\1,')
+
+[[ "${VIDEO}" != "" ]] || fail "No video group found."
+
+ADD_GROUPS="--group-add ${VIDEO}"
+[[ "${RENDER}" != "" ]] && ADD_GROUPS+=" --group-add ${RENDER}"
+
 video_detect() {
   for file in "${*}"; do
     INFO=($(ffprobe -v error \
@@ -90,7 +99,7 @@ function convert {
   fi
 
   echo -n "Counting frames in ${IN}: "
-  FRAMES=$(ffprobe -v error -select_streams v:0 -count_packets -show_entries stream=nb_read_packets -of csv=p=0 "${IN}")
+  FRAMES=$(ffprobe -v error -select_streams v:0 -count_packets -show_entries stream=nb_read_packets -of csv=p=0 "${IN}") || fail "Unable to count frames"
   echo "${FRAMES} frames."
 
   # Use stdbuf to flush stdout/stderr every line
@@ -101,16 +110,26 @@ function convert {
   OUT=$(realpath "${OUT}")
   DIN=$(dirname "${IN}")
   DOUT=$(dirname "${OUT}")
-  NO_COLOR=1 \
-    docker run --user=1000 --device=/dev/dri \
+  if false; then
+    quiet="
+      -v quiet
+      -loglevel fatal
+    "
+  else
+    quiet=""
+  fi
+
+  docker run \
+    --device=/dev/dri \
+    --user=$(id -u) \
     --rm \
+    ${ADD_GROUPS} \
     -v "${DIN}:${DIN}" \
     -v "${DOUT}:${DOUT}" \
     intel-media-ffmpeg \
     ffmpeg \
+    ${quiet} \
       -nostdin \
-      -v quiet \
-      -loglevel fatal \
     ${input_flags} \
       -i "${IN}" \
       -progress /dev/stdout \
@@ -118,26 +137,35 @@ function convert {
     ${output_flags} \
       -movflags +faststart \
     "${OUT}" \
-      -y | while read line; do
-      POS=$(echo $line | sed -n 's/^frame=*\(.*\)/\1/p')
-      if [[ "${POS}" != "" ]]; then
-        NOW=$(date +%s)
-        ELAPSEDTIME=$(( NOW - LASTTIME ))
-        if (( ELAPSEDTIME > 5 )); then
-          ELAPSEDFRAMES=$(( POS - LASTPOS ))
-          REMAININGFRAMES=$(( FRAMES - POS ))
-          REMAININGFRAMES=$(( REMAININGFRAMES * 1000 )) # convert to ms
-          FRAMERATE=$(( ELAPSEDFRAMES / ELAPSEDTIME ))
-          if (( FRAMERATE != 0 )); then
-            REMAININGMS=$(( REMAININGFRAMES / FRAMERATE ))
-            printf "\r%*s\r%s" $(tput cols) " " "Processing for $(mstodate $(( NOW - STARTTIME ))000). Processing at ($((ELAPSEDFRAMES / ELAPSEDTIME ))fps). Now at frame $POS of $FRAMES $(( $(( 100 * POS)) / FRAMES ))%. Estimating $(mstodate ${REMAININGMS}) remaining."
-          else
-            printf "\r%*s\r%s" $(tput cols) " " "Processing for $(mstodate $(( NOW - STARTTIME ))000). Processing at ($((ELAPSEDFRAMES / ELAPSEDTIME ))fps). Now at frame $POS of $FRAMES $(( $(( 100 * POS)) / FRAMES ))%. No frames processed in last ${ELAPSEDTIME} seconds."
-          fi
-          LASTTIME=${NOW}
-          LASTPOS=${POS}
-        fi
+      -y || fail "ffmpeg failed" 2>&1 |
+    while read line; do
+      if [[ "${line}" == "ffmpeg failed" ]]; then
+        false
+        break
       fi
+      POS=$(echo $line | sed -n 's/^frame=*\(.*\)/\1/p')
+      if [[ "${POS}" == "" ]]; then
+        continue
+      fi
+
+      NOW=$(date +%s)
+      ELAPSEDTIME=$(( NOW - LASTTIME ))
+      if (( ELAPSEDTIME <= 5 )); then
+        continue
+      fi
+
+      ELAPSEDFRAMES=$(( POS - LASTPOS ))
+      REMAININGFRAMES=$(( FRAMES - POS ))
+      REMAININGFRAMES=$(( REMAININGFRAMES * 1000 )) # convert to ms
+      FRAMERATE=$(( ELAPSEDFRAMES / ELAPSEDTIME ))
+      if (( FRAMERATE != 0 )); then
+        REMAININGMS=$(( REMAININGFRAMES / FRAMERATE ))
+        printf "\r%*s\r%s" $(tput cols) " " "Processing for $(mstodate $(( NOW - STARTTIME ))000). Processing at ($((ELAPSEDFRAMES / ELAPSEDTIME ))fps). Now at frame $POS of $FRAMES $(( $(( 100 * POS)) / FRAMES ))%. Estimating $(mstodate ${REMAININGMS}) remaining."
+      else
+        printf "\r%*s\r%s" $(tput cols) " " "Processing for $(mstodate $(( NOW - STARTTIME ))000). Processing at ($((ELAPSEDFRAMES / ELAPSEDTIME ))fps). Now at frame $POS of $FRAMES $(( $(( 100 * POS)) / FRAMES ))%. No frames processed in last ${ELAPSEDTIME} seconds."
+      fi
+      LASTTIME=${NOW}
+      LASTPOS=${POS}
     done && move && {
       if [[ "${ORIG}" == "${IN}" ]]; then
         # If the original file was an '.mkv' then OUT was '.transcoded.mkv'