user25662: I'm using the following command (in my android application) to overlay an image on top of a video:
"-i", video.mp4, "-i", image.mp4, "-filter_complex", "[0:v]pad=iw:if(lte(ih\\,iw)\\,ih\\,2trunc(iw*16/9/2)):(ow-iw)/2:(oh-ih)/2[v0];[1:v][v0]scale2ref[v1][v0];[v0][v1]overlay=x=(W-w)/2:y=(H-h)/2[v]", "-map", "[v]", "-map", "0:a", "-c:v", "libx264", "-preset", "ultrafast", "-r", outFPS, output.mp4

I implemented the above after asking this question.

This works perfectly fine when the video aspect ratio is 16:9, but I have users that complain that the image is not at the correct position. I noticed that this is on devices that has a different aspect ratio, for example 13:6.

Is it correct if I change the command to the following, if for example, the aspect ratio is 13:6?
"-i", video.mp4, "-i", image.mp4, "-filter_complex", "[0:v]pad=iw:if(lte(ih\\,iw)\\,ih\\,2trunc(iw*13/6/2)):(ow-iw)/2:(oh-ih)/2[v0];[1:v][v0]scale2ref[v1][v0];[v0][v1]overlay=x=(W-w)/2:y=(H-h)/2[v]", "-map", "[v]", "-map", "0:a", "-c:v", "libx264", "-preset", "ultrafast", "-r", outFPS, output.mp4

I don't have a device to test with, thats why I decided to ask a question.

EDIT:
I tested with the command above using a video with the following dimensions - 1980x1020 - aspect ratio of 16:9, then the video dimensions change to 1040x480 - aspect ratio of 13:6.
That is exactly what I wanted, here is the issue:
If I use the video mentioned above (1040x480 - aspect ratio of 13:6) and I try to change the aspect ratio to 16:9, using the first command in this question, then I get the following error:
[Parsed_pad_0 @ 0xeeb3f540] Input area 0:-94:480:946 not within the padded area 0:0:480:852 or zero-sized
[Parsed_pad_0 @ 0xeeb3f540] Failed to configure input pad on Parsed_pad_0
Error reinitializing filters!
Failed to inject frame into filter network: Invalid argument
Error while processing the decoded data for stream #1:0


Edit2
Running the command mentioned in the comments of the answer, this is the result.
After FFmpeg:
Without adding -noautorotate

After adding -noautorotate


EDIT 3
Here is the log without using -noautorotate
I used this command:
String[] s = {"-ss", valueLeft, "-i", mStringFilePath, "-i", drawingPath, "-filter_complex", "[0:v]scale=iw*sar:ih,setsar=1,pad='max(iw\\,2*trunc(ih*16/9/2))':'max(ih\\,2*trunc(ow*9/16/2))':(ow-iw)/2:(oh-ih)/2[v0];[1:v][v0]scale2ref[v1][v0];[v0][v1]overlay=x=(W-w)/2:y=(H-h)/2,scale=-2:min(1080\\,ih)[v]", "-map", "[v]", "-map", "0:a", "-c:v", "libx264", "-preset", "ultrafast", "-r", outFPS, path};


Here is the log with using -noautorotate
I used this command:
String[] s = {"-ss", valueLeft,"-noautorotate", "-i", mStringFilePath, "-i", drawingPath, "-filter_complex", "[0:v]scale=iw*sar:ih,setsar=1,pad='max(iw\\,2*trunc(ih*16/9/2))':'max(ih\\,2*trunc(ow*9/16/2))':(ow-iw)/2:(oh-ih)/2[v0];[1:v][v0]scale2ref[v1][v0];[v0][v1]overlay=x=(W-w)/2:y=(H-h)/2,scale=-2:min(1080\\,ih)[v]", "-map", "[v]", "-map", "0:a", "-c:v", "libx264", "-preset", "ultrafast", "-r", outFPS, path};


Here is the links to the videos:

Link to original video
Link to video that doesn't use -noautorotate
Link to video after using -noautorotate


user1871: Use
"[0:v]scale=iw*sar:ih,setsar=1,pad='max(iw\,2*trunc(ih*16/9/2))':'max(ih\,2*trunc(ow*9/16/2))':(ow-iw)/2:(oh-ih)/2[v0];[1:v][v0]scale2ref[v1][v0];[v0][v1]overlay=x=(W-w)/2:y=(H-h)/2[v]"
First, the scale and setsar make sure the image becomes a square-pixel input. Then the pad checks each dimension and pads to a 16:9 frame size.

25662: <p>I'm using the following command (in my android application) to overlay an image on top of a video:</p>

<pre><code>"-i", video.mp4, "-i", image.mp4, "-filter_complex", "[0:v]pad=iw:if(lte(ih\\,iw)\\,ih\\,2trunc(iw*16/9/2)):(ow-iw)/2:(oh-ih)/2[v0];[1:v][v0]scale2ref[v1][v0];[v0][v1]overlay=x=(W-w)/2:y=(H-h)/2[v]", "-map", "[v]", "-map", "0:a", "-c:v", "libx264", "-preset", "ultrafast", "-r", outFPS, output.mp4
</code></pre>

<p>I implemented the above after asking <a href="https://stackoverflow.com/q/55332539/5550161">this</a> question.</p>

<hr>

<p>This works perfectly fine when the video aspect ratio is <code>16:9</code>, but I have users that complain that the image is not at the correct position. I noticed that this is on devices that has a different aspect ratio, for example <code>13:6</code>.</p>

<hr>

<p>Is it correct if I change the command to the following, if for example, the aspect ratio is <code>13:6</code>?</p>

<pre><code>"-i", video.mp4, "-i", image.mp4, "-filter_complex", "[0:v]pad=iw:if(lte(ih\\,iw)\\,ih\\,2trunc(iw*13/6/2)):(ow-iw)/2:(oh-ih)/2[v0];[1:v][v0]scale2ref[v1][v0];[v0][v1]overlay=x=(W-w)/2:y=(H-h)/2[v]", "-map", "[v]", "-map", "0:a", "-c:v", "libx264", "-preset", "ultrafast", "-r", outFPS, output.mp4
</code></pre>

<p>I don't have a device to test with, thats why I decided to ask a question.</p>

<hr>

<p><strong>EDIT:</strong></p>

<p>I tested with the command above using a video with the following dimensions - <code>1980x1020</code> - aspect ratio of <code>16:9</code>, then the video dimensions change to <code>1040x480</code> - aspect ratio of <code>13:6</code>.</p>

<p>That is exactly what I wanted, here is the issue:</p>

<p>If I use the video mentioned above (<code>1040x480</code> - aspect ratio of <code>13:6</code>) and I try to change the aspect ratio to <code>16:9</code>, using the first command in this question, then I get the following error:</p>

<pre><code>[Parsed_pad_0 @ 0xeeb3f540] Input area 0:-94:480:946 not within the padded area 0:0:480:852 or zero-sized
[Parsed_pad_0 @ 0xeeb3f540] Failed to configure input pad on Parsed_pad_0
Error reinitializing filters!
Failed to inject frame into filter network: Invalid argument
Error while processing the decoded data for stream #1:0
</code></pre>

<hr>

<p><strong>Edit2</strong></p>

<p>Running the command mentioned in the comments of the answer, this is the result.</p>

<p>After FFmpeg:</p>

<p><strong>Without adding <code>-noautorotate</code></strong></p>

<p><a href="https://i.stack.imgur.com/tN3pC.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/tN3pC.jpg" alt="enter image description here"></a></p>

<p><strong>After adding <code>-noautorotate</code></strong></p>

<p><a href="https://i.stack.imgur.com/89W3V.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/89W3V.jpg" alt="enter image description here"></a></p>

<hr>

<p><strong>EDIT 3</strong></p>

<p><a href="https://pastebin.com/7xKDxP4h" rel="nofollow noreferrer">Here</a> is the log without using <code>-noautorotate</code></p>

<p>I used this command:</p>

<pre><code>String[] s = {"-ss", valueLeft, "-i", mStringFilePath, "-i", drawingPath, "-filter_complex", "[0:v]scale=iw*sar:ih,setsar=1,pad='max(iw\\,2*trunc(ih*16/9/2))':'max(ih\\,2*trunc(ow*9/16/2))':(ow-iw)/2:(oh-ih)/2[v0];[1:v][v0]scale2ref[v1][v0];[v0][v1]overlay=x=(W-w)/2:y=(H-h)/2,scale=-2:min(1080\\,ih)[v]", "-map", "[v]", "-map", "0:a", "-c:v", "libx264", "-preset", "ultrafast", "-r", outFPS, path};
</code></pre>

<hr>

<p><a href="https://pastebin.com/FNu0tdCZ" rel="nofollow noreferrer">Here</a> is the log with using <code>-noautorotate</code></p>

<p>I used this command:</p>

<pre><code>String[] s = {"-ss", valueLeft,"-noautorotate", "-i", mStringFilePath, "-i", drawingPath, "-filter_complex", "[0:v]scale=iw*sar:ih,setsar=1,pad='max(iw\\,2*trunc(ih*16/9/2))':'max(ih\\,2*trunc(ow*9/16/2))':(ow-iw)/2:(oh-ih)/2[v0];[1:v][v0]scale2ref[v1][v0];[v0][v1]overlay=x=(W-w)/2:y=(H-h)/2,scale=-2:min(1080\\,ih)[v]", "-map", "[v]", "-map", "0:a", "-c:v", "libx264", "-preset", "ultrafast", "-r", outFPS, path};
</code></pre>

<hr>

<p>Here is the links to the videos:</p>

<ul>
<li><a href="https://wetransfer.com/downloads/92ba9c4652aa07d209c12f59e4c7b8f220190711112651/fa969cf7ddb7ea86b9709c37bc4d298320190711112651/f2e0ac" rel="nofollow noreferrer">Link</a> to original video</li>
<li><a href="https://wetransfer.com/downloads/b7347585d7dbaf01ae0db8ae1176792f20190711113615/4c83b5d523725eb6892af386e65efa3b20190711113615/aead93" rel="nofollow noreferrer">Link</a> to video that doesn't use <code>-noautorotate</code></li>
<li><a href="https://wetransfer.com/downloads/11c94ac17be8c028bd614997a28e08b820190711113141/8efe951610dc9f228ecc5e3a4fa12b2b20190711113141/23e20b" rel="nofollow noreferrer">Link</a> to video after using <code>-noautorotate</code></li>
</ul>
 1871: <p>Use</p>

<p><code>"[0:v]scale=iw*sar:ih,setsar=1,pad='max(iw\,2*trunc(ih*16/9/2))':'max(ih\,2*trunc(ow*9/16/2))':(ow-iw)/2:(oh-ih)/2[v0];[1:v][v0]scale2ref[v1][v0];[v0][v1]overlay=x=(W-w)/2:y=(H-h)/2[v]"</code></p>

<p>First, the scale and setsar make sure the image becomes a square-pixel input. Then the pad checks each dimension and pads to a 16:9 frame size.</p>
