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FFMPEG Command to Convert MP4 to H 264 with libx264, CRF Quality Control, AAC Audio Encoding in CMD
Jun 3, 2025
ffmpeg -i input.mp4 -c:v libx264 -crf 0 -preset veryslow -c:a copy output.mp4
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0:00
uh hello guys uh welcome to this video
0:02
so in this video I will show you how to
0:04
encode your video with the lib x264
0:08
encoder inside ffmpg so I'm taking a
0:10
very simple example we have a mp4 video
0:13
right here present right here so I will
0:15
try to encode this video with the lib
0:18
x264 encoder inside ffmppg so there is a
0:22
s simple uh command that I have given in
0:24
the description of this video so just
0:27
open the command line and just execute
0:29
this command here so I will just show
0:32
you the command here and explain you so
0:34
just write here
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ffmppg dash i and then followed by the
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name of the file which is 1.mpp4 and
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then we actually provide the encoder by
0:45
this option here - c col v so here we
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are using the lib x264 encoder which is
0:53
a default encoder inside FMPG to encode
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your videos and then we can also adjust
0:58
some options such as uh CRF option so
1:03
this will be the frame
1:05
rate so CRF option is used to control
1:08
the quality of the video so here we are
1:10
specifically providing zero which will
1:12
be the highest quality and then you can
1:14
even set a preset
1:17
so we have various options for this we
1:19
can have ultra fast fast slow very slow
1:23
so very slow will actually encode your
1:24
video in a better way it will increase
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the quality and then you can even set
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the bit rate by this option - CA so we
1:33
will just copy the bit rate and then
1:35
this will be the output file so
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output.mpp4 so this is actually the
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whole command here so you can see we are
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providing the input file then we are
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using this encoder we are setting the
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CRF value preset we are providing and
1:48
this is your output file so if I press
1:51
enter you will see it will now start the
1:54
encoding process so this will just
1:57
depend upon how long is your video so
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it's the original video is 2 minute 10
2:02
second long so it will basically take uh
2:06
hello
2:07
guys it will not take too much time so
2:11
if you have a very long video then it
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will take some time so you can just see
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it is processing
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it so if you want to increase the speed
2:22
you can enable GPU uh graphical
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processing unit to increase
2:27
the efficiency of ffmppg
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command so I've made this video on the
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channel you can watch how to enable GPU
2:36
inside ffmpg so just wait for the
2:39
command to finish and it will actually
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encode your
2:45
video so once it finishes you will get a
2:48
notification and
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uh so now you can see the actually the
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video has been created this is your
2:57
output video this was the original video
3:00
11.1
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MP so we can open this
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so you can see this is the output video
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then you should definitely be able to
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path here editn net and just click okay
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okay will perfectly
3:24
work so this
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is uh hello guys welcome called
3:31
asnet in this way you can do this uh the
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command I have given in the description
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of this video so you can actually
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convert your MP4 to H264 encoder lib
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x264 encoder we have encoded this video
3:44
and also control the quality control
3:46
using CRF and also check out my website
3:50
freemediattools.com
3:52
uh which contains thousands of tools
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