I experience quite some problems with the standard H264 2-pass transcoding profiles. Searched this forum and find out to run some ffmpeg command line tests.
for example this works:
ffmpeg -i /mnt/mediamosa/data/G/G2MJkXvRFTUhpuIQDIruhBQ2 -acodec libfaac -vcodec libx264 -vpre slow -b 536000 -r 25 testvid.mov
and this won't work (2-pass):
ffmpeg -i /mnt/mediamosa/data/G/G2MJkXvRFTUhpuIQDIruhBQ2 -acodec libfaac -ab 128000 -ar 44100 -ac 2 -vcodec libx264 -pass 2 -s 640x350 testvid.mov
Cannot read file 'ffmpeg2pass-0.log': No such file or directory
Error reading log file 'ffmpeg2pass-0.log' for pass-2 encoding
So i read a lot about it and found out that for the 2-pass encoding FFMPEG needs to write a logfile which it will use at the 2nd pass to improve what it did in the 1st pass, and that ffmpeg can get a parameter -passlogfile, but where is it stored by mediamosa?
I don't read anything about these problems on this forum so maybe something is wrong with my ffmpeg or permissions, location of the temp log files ?
Earlier i experienced problems with all libx264 transcodings because the preset files were missing, i managed to get them online so that is fixed.
Tried to find some info here: http://drupal.org/node/1070698 , but like to hear from some of you.