Print stderr in ffmpeg.log (#67)

.github/ISSUE_TEMPLATE/bug_report.md

@@ -35,11 +35,11 @@ A clear and concise description of what the bug is.
 - Copy paste those lines in a new [gist](https://gist.github.com/)
 - Add the gist link to the issue
 
-## `ffmpeg-FFMxxxx.stderr` (containing chunks transcoding operations)
-- When you ran `ls -al | grep ffmpeg` you should have seen another file that looks like `ffmpeg-FFMxxxx.stderr`
-- Type `tail -100 ffmpeg-FFMxxxx.stderr` (replacing the filename by the correct one)
+## `ffmpeg-xxxx.stderr` (containing chunks transcoding operations)
+- When you ran `ls -al | grep ffmpeg` you should have seen another file that looks like `ffmpeg-xxxx.stderr` in case of error, the file may not be there, in that specific case, you can ignore these steps.
+- Type `tail -100 ffmpeg-xxxx.stderr` (replacing the filename by the correct one)
 - Copy paste those lines in a new [gist](https://gist.github.com/)
-- Type `head -300 ffmpeg-FFMxxxx.stderr` (replacing the filename by the correct one)
+- Type `head -300 ffmpeg-xxxx.stderr` (replacing the filename by the correct one)
 - Copy paste those lines in another new [gist](https://gist.github.com/)
 - Copy paste all the gists links in the issue
 

ffmpeg-wrapper.sh

@@ -24,7 +24,10 @@ function info() {
 }
 
 function handle_error() {
-  log "ERROR" "Error on line $(caller)"
+  log "ERROR" "An error occurred, here is the $stderrfile content: "
+  newline
+  cat "$stderrfile" >> $logfile
+  newline
   errcode=1
   endprocess
 }