Body: <p>I have been searching all the web on how to downscale 4k video so that it can play on my non 4k TV.</p>
  
  <p>My 4k video has a resolution of 3840 x 2160 with an audio format of pcm_s16be in a mp4 container. I am trying to convert it to 1920 x 1080 with an audio format of aac.
  I use Lubuntu and have been experimenting with the command lines without success.</p>
  
  <p>Thanks</p>
  
  <p>Update -- After further searching I found this code which converts the audio from pcw to aac</p>
  
  <p>ffmpeg -y -i C0010.MP4 -vcodec copy -strict experimental  -c:a aac output-fileC0010.MP4</p>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2018-04-01T07:13:44.923Z
Comments.Text: What command did you try?
Comments.UserDisplayName: Gyan
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2018-04-02T22:20:15.067Z
Comments.Text: I have lost track of the number of commands I have tried but here is an example - ffmpeg -i output-file.MP4-vf scale=iw/2:-1 outputt.mp4
Comments.UserDisplayName: Smokeyone
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2018-04-03T05:19:27.573Z
Comments.Text: Assuming the lack of space between `MP4` and `-vf` is a typo, command looks ok. What's the issue?
Comments.UserDisplayName: Gyan
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2018-04-06T05:34:35.190Z
Comments.Text: Ah, but I still have not managed to write the command to downscale the video after encoding the audio ...
Comments.UserDisplayName: smokeyone
Tags: <ffmpeg><4k>
Title: how to downscale 4k with ffmpeg
UserDisplayName: Smokeyone
ThreadText: # how to downscale 4k with ffmpeg
  
  (Asked by: username_0 on 2018-04-01)
  
  I have been searching all the web on how to downscale 4k video so that it can play on my non 4k TV.
  
  My 4k video has a resolution of 3840 x 2160 with an audio format of pcm\_s16be in a mp4 container. I am trying to convert it to 1920 x 1080 with an audio format of aac.
  I use Lubuntu and have been experimenting with the command lines without success.
  
  Thanks
  
  Update -- After further searching I found this code which converts the audio from pcw to aac
  
  ffmpeg -y -i C0010.MP4 -vcodec copy -strict experimental -c:a aac output-fileC0010.MP4
  
  **Tags:** ffmpeg, 4k
  
  > **Comments:**
  > **username_1**: What command did you try?  
  > **username_0**: I have lost track of the number of commands I have tried but here is an example - ffmpeg -i output-file.MP4-vf scale=iw/2:-1 outputt.mp4  
  > **username_1**: Assuming the lack of space between `MP4` and `-vf` is a typo, command looks ok. What's the issue?  
  > **username_2**: Ah, but I still have not managed to write the command to downscale the video after encoding the audio ...  
  
  ---
  
  ## 0 answers
  
  