Kdenlive/Manual/Project Menu/Render/Render Profile Parameters: Difference between revisions

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== Render Profile Parameters - How to read them ==
== Render Profile Parameters - How to read them == <!--T:1-->


<!--T:2-->
[[File:Custom render profiles.png|300px]]
[[File:Custom render profiles.png|300px]]


<!--T:3-->
The parameters that go into a render profile derive from the '''ffmpeg''' program.
The parameters that go into a render profile derive from the '''ffmpeg''' program.


<!--T:4-->
This is a worked example to show how you can understand what these parameters mean using the '''ffmpeg''' documentation.
This is a worked example to show how you can understand what these parameters mean using the '''ffmpeg''' documentation.


<!--T:5-->
In the example above the parameters are:
In the example above the parameters are:


  f=dvd  
  <!--T:6-->
f=dvd  
  vcodec=mpeg2video  
  vcodec=mpeg2video  
  acodec=mp2   
  acodec=mp2   
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  pass=2
  pass=2


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Looking up the [http://linux.die.net/man/1/ffmpeg  ffmpeg help] translates these parameters as:
Looking up the [http://linux.die.net/man/1/ffmpeg  ffmpeg help] translates these parameters as:


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a main option is  
a main option is  
  -f fmt              force format
  -f fmt              force format


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video options are  
video options are  
  -vcodec codec    force video codec ('copy' to copy stream)
  -vcodec codec    force video codec ('copy' to copy stream)
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  -trellis                  <int>  E.VA. rate-distortion optimal quantization
  -trellis                  <int>  E.VA. rate-distortion optimal quantization


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audio options are
audio options are
  -acodec codec      force audio codec ('copy' to copy stream)
  -acodec codec      force audio codec ('copy' to copy stream)
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  -ar rate                  set audio sampling rate (in Hz)
  -ar rate                  set audio sampling rate (in Hz)


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The AVCodecContext AVOptions include:
The AVCodecContext AVOptions include:
  -b                <int>  E.V.. set bitrate (in bits/s)
  -b                <int>  E.V.. set bitrate (in bits/s)
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  -g                <int>  E.V.. set the group of picture size
  -g                <int>  E.V.. set the group of picture size


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So all the render profile options are documented here in the '''ffmpeg''' documentation.
So all the render profile options are documented here in the '''ffmpeg''' documentation.


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{{Prevnext2
{{Prevnext2
| prevpage=Special:MyLanguage/Kdenlive/Manual/Rendering | nextpage=Special:MyLanguage/Kdenlive/Manual/Capturing
| prevpage=Special:MyLanguage/Kdenlive/Manual/Rendering | nextpage=Special:MyLanguage/Kdenlive/Manual/Capturing
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}}
}}


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[[Category:Kdenlive]]
[[Category:Kdenlive]]
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Revision as of 12:27, 7 November 2012

Other languages:

Render Profile Parameters - How to read them

The parameters that go into a render profile derive from the ffmpeg program.

This is a worked example to show how you can understand what these parameters mean using the ffmpeg documentation.

In the example above the parameters are:

f=dvd 
vcodec=mpeg2video 
acodec=mp2  
b=5000k 
maxrate=8000k 
minrate=0 
bufsize=1835008 
mux_packet_s=2048 
mux_rate=10080000 
ab=192k 
ar=48000 
s=720x576 
g=15 
me_range=63 
trellis=1 
profile=dv_pal_wide 
pass=2

Looking up the ffmpeg help translates these parameters as:

a main option is

-f fmt              force format

video options are

-vcodec codec     force video codec ('copy' to copy stream)
-pass n                select the pass number (1 or 2)
-b bitrate             set bitrate (in bits/s)
-vb bitrate           set bitrate (in bits/s)
-s size                 set frame size (WxH or abbreviation)
-me_range          <int>   E.V.. limit motion vectors range (1023 for DivX player)
-trellis                  <int>   E.VA. rate-distortion optimal quantization

audio options are

-acodec codec      force audio codec ('copy' to copy stream)
-ab bitrate             set bitrate (in bits/s)
-ar rate                  set audio sampling rate (in Hz)

The AVCodecContext AVOptions include:

-b                 <int>   E.V.. set bitrate (in bits/s)
-maxrate      <int>   E.V.. set max video bitrate tolerance (in bits/s)
-minrate       <int>   E.V.. set min video bitrate tolerance (in bits/s)
-g                 <int>   E.V.. set the group of picture size

So all the render profile options are documented here in the ffmpeg documentation.