Body: <p>I'm using ffmpeg to transcode mp4 file, I got the below command from: <a href="http://www.wowza.com/forums/content.php?192-Encoding-Suggestions-for-Video-on-Demand" rel="nofollow">http://www.wowza.com/forums/content.php?192-Encoding-Suggestions-for-Video-on-Demand</a>.</p>
  
  <pre><code>ffmpeg -y -i Butterfly_HD_1080p.mp4 -s 320x180 -y -strict experimental -acodec aac -ab 64k -ac 2 -ar 48000 -vcodec libx264 -vprofile main -g 48 -b 270000 -threads 64 butterfly_400.mp4
  </code></pre>
  
  <p>based on what they decide the bitrate for above output file will be 400(400000)? what the equation that they use for bitrate value?</p>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2015-08-15T17:22:18.897Z
Comments.Text: I don't understand your question. Also, that command from the link you provided is not good. If you explain what you're trying to do we can provide a sane command.
Comments.UserDisplayName: llogan
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2015-08-15T19:15:53.613Z
Comments.Text: Based on the command that you copied from the forum post, the bit rate of the video encoding would be 270,000 bits/second. The bitrate of the AAC audio encoding would be 64,000 bits/second (hence `-ab 64k`), so the total bitrate for the assembled file would be 270k+64k=334k.
  
  So I have no idea where you're getting 400(400000) from, and I would have to agree with Neckbeard: telling us what you want to accomplish makes it possible to provide answers.
Comments.UserDisplayName: WineSoaked
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2015-08-16T04:17:11.307Z
Comments.Text: I need to encode videos and add them to wowza server. after encoding I need to create smil file for these videos and bitrate is required filed on smil file., so, what is the bitrate for the above command? is it 270000? . but in wowza documentation they fill smil file with 400000 bitrate for the same command.
Comments.UserDisplayName: jobin
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2015-08-16T04:17:51.283Z
Comments.Text: @LordNeckbeard can share with me good commands? I need to use them with mpeg dash
Comments.UserDisplayName: jobin
Tags: <ffmpeg>
Title: What the equation that we should use to know the bitrate value?
UserDisplayName: jobin
ThreadText: # What the equation that we should use to know the bitrate value?
  
  (Asked by: username_0 on 2015-08-15)
  
  I'm using ffmpeg to transcode mp4 file, I got the below command from: <http://www.wowza.com/forums/content.php?192-Encoding-Suggestions-for-Video-on-Demand>.
  
  ```
  ffmpeg -y -i Butterfly_HD_1080p.mp4 -s 320x180 -y -strict experimental -acodec aac -ab 64k -ac 2 -ar 48000 -vcodec libx264 -vprofile main -g 48 -b 270000 -threads 64 butterfly_400.mp4
  
  ```
  
  based on what they decide the bitrate for above output file will be 400(400000)? what the equation that they use for bitrate value?
  
  **Tags:** ffmpeg
  
  > **Comments:**
  > **username_1**: I don't understand your question. Also, that command from the link you provided is not good. If you explain what you're trying to do we can provide a sane command.  
  > **username_2**: Based on the command that you copied from the forum post, the bit rate of the video encoding would be 270,000 bits/second. The bitrate of the AAC audio encoding would be 64,000 bits/second (hence `-ab 64k`), so the total bitrate for the assembled file would be 270k+64k=334k.  So I have no idea where you're getting 400(400000) from, and I would have to agree with Neckbeard: telling us what you want to accomplish makes it possible to provide answers.  
  > **username_0**: I need to encode videos and add them to wowza server. after encoding I need to create smil file for these videos and bitrate is required filed on smil file., so, what is the bitrate for the above command? is it 270000? . but in wowza documentation they fill smil file with 400000 bitrate for the same command.  
  > **username_0**: @LordNeckbeard can share with me good commands? I need to use them with mpeg dash  
  
  ---
  
  ## 0 answers
  
  