Answers.Body: <p>ffplay is designed to play a single input. So, a workaround is needed.</p>
  
  <pre><code>ffplay -f lavfi "movie=org[a];movie=enc[b];[a][b]blend=all_mode=difference"
  </code></pre>
  
  <p>A filtergraph is created and movie source filters used to open the files, then blended.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-05-23T23:40:37.370Z
Answers.Text: I got error Argument [filename]  provided as input filename, but [filename][a]; "  was already specified.
Answers.UserDisplayName: Alex Zubkov
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-05-24T05:04:23.770Z
Answers.Text: Add `report` to command and share report.
Answers.UserDisplayName: Gyan
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-05-24T22:32:21.137Z
Answers.Text: https://pastebin.com/bZdu5GL0 - report
Answers.UserDisplayName: Alex Zubkov
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-05-25T05:25:41.467Z
Answers.Text: The command has to be in the form in my answer: `ffplay -f lavfi "movie='C\:/Users/Lover/Desktop/video.wmv'[a];movie='C\:/Users/Lover/Desktop/video - Copy.wmv'[b];[a][b]blend=all_mode=difference"`
Answers.UserDisplayName: Gyan
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-05-25T16:43:32.870Z
Answers.Text: great! That works, is there any way how to create 2 ffplay windows to compare side by side? This blend mode doesn't help too much in my case. I can tell they different in terms of pixel peeping but i need full range of colors.
Answers.UserDisplayName: Alex Zubkov
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-05-25T16:44:32.070Z
Answers.Text: Instead of `blend=all_mode=difference` use `hstack`
Answers.UserDisplayName: Gyan
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-05-25T16:48:43.653Z
Answers.Text: I was aiming for! Thx a lot
Answers.UserDisplayName: Alex Zubkov
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-05-23T06:57:54.070Z
Answers.LastActivityDate: 2018-05-23T13:16:45.587Z
Answers.LastEditDate: 2018-05-23T13:16:45.587Z
Answers.UserDisplayName: Gyan
Body: <p>One of those videos lower resolution, another one is higher</p>
  
  <pre><code>ffplay.exe -i [PATHTOFILE][org] -i[PATHTOFILE][enc];\
  [org][enc]blend=all_mode=difference"enter code here
  </code></pre>
  
  <p>but i got error </p>
  
  <pre><code>    No such filter: [filename1][org][filename2][enc];
  [org][enc]blend=all_mode=difference: Invalid argument
  </code></pre>
  
  <p>I Just want to compare my videos utilizing <strong>FFPLAY</strong> with many inputs to save some memory.</p>
  
Tags: <ffmpeg><video-editor><signal-processing>
Title: I want to compare two video files using FFPLAY
UserDisplayName: Alex Zubkov
ThreadText: # I want to compare two video files using FFPLAY
  
  (Asked by: username_0 on 2018-05-23)
  
  One of those videos lower resolution, another one is higher
  
  ```
  ffplay.exe -i [PATHTOFILE][org] -i[PATHTOFILE][enc];\
  [org][enc]blend=all_mode=difference"enter code here
  
  ```
  
  but i got error
  
  ```
      No such filter: [filename1][org][filename2][enc];
  [org][enc]blend=all_mode=difference: Invalid argument
  
  ```
  
  I Just want to compare my videos utilizing **FFPLAY** with many inputs to save some memory.
  
  **Tags:** ffmpeg, video-editor, signal-processing
  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2018-05-23. Score: 2 | Accepted answer
  
  ffplay is designed to play a single input. So, a workaround is needed.
  
  ```
  ffplay -f lavfi "movie=org[a];movie=enc[b];[a][b]blend=all_mode=difference"
  
  ```
  
  A filtergraph is created and movie source filters used to open the files, then blended.
  
  > **Comments:**
  > **username_0**: I got error Argument [filename]  provided as input filename, but [filename][a]; "  was already specified.  
  > **username_1**: Add `report` to command and share report.  
  > **username_0**: https://pastebin.com/bZdu5GL0 - report  
  > **username_1**: The command has to be in the form in my answer: `ffplay -f lavfi "movie='C\:/Users/Lover/Desktop/video.wmv'[a];movie='C\:/Users/Lover/Desktop/video - Copy.wmv'[b];[a][b]blend=all_mode=difference"`  
  > **username_0**: great! That works, is there any way how to create 2 ffplay windows to compare side by side? This blend mode doesn't help too much in my case. I can tell they different in terms of pixel peeping but i need full range of colors.  
  > **username_1**: Instead of `blend=all_mode=difference` use `hstack`  
  > **username_0**: I was aiming for! Thx a lot  
  
  ---
  
  