ffmpeg error log?

does the pre-packaged ffmpeg have an error log output anywhere? when i import my old videos onto a fresh dolphin 7.1.4 install, new uploads keep failing to convert... no idea why... but they worked before i imported old videos.

I would suggest to try to make the following changes in flash/modules/video/inc/header.inc.php file:

$GLOBALS['aConvertTmpls'] = array(
  "playX264" => $GLOBALS['sFfmpegPath'] . " -y -i #input# -b:v #bitrate#k -vcodec libx264 -s #size# #audio_options# #output# 2>&1 >/tmp/ffmpeg1.log",
  "play" => $GLOBALS['sFfmpegPath'] . " -y -i #input# -r 25 -b:v #bitrate#k -s #size# #audio_options# #output# 2>&1 >/tmp/ffmpeg2.log",
  "image" => $GLOBALS['sFfmpegPath'] . " -y -i #input# #size# -ss #second# -vframes 1 -an -f image2 #output# 2>&1 >/tmp/ffmpeg3.log",
);