Correcting errors and minor modifications

[gpantelis]

With this parameters "-vcodec", "copy", "-acodec", "copy" the output video was wrong(starting time was wrong and the video freezed after a few seconds)
But when i remove those the output video was exaclty like I want to.

[coveralls]

Coverage decreased (-0.8%) to 53.248% when pulling 1ddb7b9 on gpantelis:patch-4 into 1c5c633 on Zulko:master.

[coveralls]

Coverage remained the same at 65.44% when pulling edb4ac4 on gpantelis:patch-4 into 497c852 on Zulko:master.

[gpantelis]

@Earney i think this can solve the #508 issue

[ghost]

@gpantelis awesome.. I'll take a look.

[scrpy]

Gentle bump :-)

[gpotter2]

Hi,
Here is a much better answer: https://stackoverflow.com/a/33188399/5459467
It fully fixes moviepy to simply switch the --ss and -i line.

This fix is kinda wrong, you do want to copy the video and audio codecs, since this isn't the default..

[adrianhust]

With this parameters "-vcodec", "copy", "-acodec", "copy" the output video was wrong(starting time was wrong and the video freezed after a few seconds)
But when i remove those the output video was exaclty like I want to.

35 cmd = [get_setting("FFMPEG_BINARY"),"-y",
36 ¦ ¦ "-i", filename,
37 ¦ ¦ "-ss", "%0.2f"%t1,
38 ¦ ¦ "-t", "%0.2f"%(t2-t1),
39 ¦ ¦ targetname]
40 ¦ ¦ #"-vcodec", "copy", "-acodec", "copy", targetname]

just remove // "-vcodec", "copy", "-acodec", "copy", // in lib/python2.7/site-packages/moviepy/video/io/ffmpeg_tools.py it works for me

[gpotter2]

#848 is a better fix to the issue than this PR, which has a pretty bad effect on quality + messes with the codecs 😄

it applies this solution