Improve handling; Fix errors

stream.sh

@@ -1,49 +1,61 @@
 #!/usr/bin/env bash
 
-set -euo pipefail
-
 if ! command -v inotifywait >/dev/null 2>&1; then
-    echo "Please install inotify_utils"
-    exit 1
+  echo "Please install inotify_utils"
+  exit 1
 fi
 
-
 declare -A STREAMS
 
-
-streaming() {
-  while true; do
-    echo "Streaming $1"
-    #echo ffmpeg -loglevel -8 -f v4l2 -framerate 30 -input_format mjpeg -i "/dev/$1" -f libndi_newtek -y "$1"
-    ~/ndi/ffmpeg/ffmpeg -f v4l2 -framerate 30 -input_format mjpeg -i "/dev/$1" -pix_fmt uyvy422 -f libndi_newtek -y "$1.mov"
-    echo "Failed $1; Restarting"
-    sleep 1
-  done
+failed() {
+    echo "Streaming $1 failed"
+    tail -n 5 "/tmp/$1_log"
 }
 
+streaming() {
+  echo "Streaming $1"
+  echo "Logfile: /tmp/$1_log"
+
+  (set -o xtrace; ffmpeg \
+    -f v4l2 \
+    -framerate 30 \
+    -i "/dev/$1" \
+    -pix_fmt uyvy422 \
+    -f libndi_newtek \
+    -y "$1" \
+    > "/tmp/$1_log" \
+    2>&1
+  ) || failed "$1"
+}
 
 check_initial_devices() {
   for file in /dev/video*; do
-    echo "Found ${file##*/}"
-    (streaming "${file##*/}") &
+    file="${file##*/}"
+    echo "Found $file"
+    (streaming "$file") &
     STREAMS[$file]=$!
-    echo "${file##*/} PID ${STREAMS[$file]}"
+    echo "$file PID ${STREAMS[$file]}"
   done
 }
 
-
 listen_for_new_devices() {
   inotifywait -m /dev --format "%f" -e create |
     while read -r file; do
-      echo "Found $file"
-      if [[ -v "STREAMS[$file]" && "$file" =~ video\d+$ ]]; then
-        (streaming "$file") &
-        STREAMS[$file]=$!
-        echo "$file PID ${STREAMS[$file]}"
+      if [[ "$file" =~ video[0-9]+$ ]]; then
+        echo "Found $file"
+
+        if ! ps -p "${STREAMS[$file]}"> /dev/null; then
+          unset "STREAMS[$file]"
+        fi
+
+        if [[ ! -v "STREAMS[$file]" ]]; then
+          (streaming "$file") &
+          STREAMS[$file]=$!
+          echo "$file PID ${STREAMS[$file]}"
+        fi
       fi
     done
 }
 
-
 check_initial_devices
 listen_for_new_devices