<p>Compression by default is removing information. “Lossless” compression, if repeated, will indeed result in degradation after a few generations.</p>

<p>Higher compression rates will degrade after fewer generations.</p>

CC BY-SA 4.0
2018-10-22T12:46:11.393Z
2018-10-22T12:46:11.393Z
AskMrVideo
<p>If you give same bitrate setting (I assume it is configurable in Adobe Premiere), I don't expect you perceive the quality difference.</p>

<p>You could use FFMPEG to remove the audio on your first output with <code>-an</code> flag. Command will be like</p>

<p><code>ffmpeg -i first_output.mp4-c copy -an nosound_output.mp4</code></p>

<p><a href="http://www.ffmpeg.org/ffmpeg-doc.html#SEC8" rel="nofollow noreferrer">Reference</a></p>

CC BY-SA 4.0
2018-10-22T05:37:22.787Z
Thanks.  I tried your FFMPEG solution to see if there was any difference.  Resulting total bit rates as follows:
1st output: 42953kbps
2nd output: 42584kbps
FFMPEG output: 42629kbps
indispensable PC
CC BY-SA 4.0
2018-10-21T20:18:04.883Z
2018-10-21T20:18:04.883Z
Chien-Yu
<p>After exporting a time lapse video as H.246 mp4 using Adobe Premiere I realized I wanted a second copy without sound, but I had already changed the settings.  To save time I simply imported the mp4 to Premiere and then exported it again with the same H.246 settings but without the audio channel.</p>

<p>After close analysis of the 2 files I can't perceive any loss in quality, but I worry that I may have lost a tiny bit of quality through this process. Would repeating this process eventually result in noticeable loss of quality?  </p>

<video><premiere><quality>
Would repeatedly importing and exporting H.246 video result in loss of quality?
indispensable PC
# Would repeatedly importing and exporting H.246 video result in loss of quality?

(Asked by: username_0 on 2018-10-21)

After exporting a time lapse video as H.246 mp4 using Adobe Premiere I realized I wanted a second copy without sound, but I had already changed the settings. To save time I simply imported the mp4 to Premiere and then exported it again with the same H.246 settings but without the audio channel.

After close analysis of the 2 files I can't perceive any loss in quality, but I worry that I may have lost a tiny bit of quality through this process. Would repeating this process eventually result in noticeable loss of quality?

**Tags:** video, premiere, quality


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## 2 answers

### Answer by username_1 on 2018-10-22. Score: 2

Compression by default is removing information. “Lossless” compression, if repeated, will indeed result in degradation after a few generations.

Higher compression rates will degrade after fewer generations.


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### Answer by username_2 on 2018-10-21. Score: 1

If you give same bitrate setting (I assume it is configurable in Adobe Premiere), I don't expect you perceive the quality difference.

You could use FFMPEG to remove the audio on your first output with `-an` flag. Command will be like

`ffmpeg -i first_output.mp4-c copy -an nosound_output.mp4`

[Reference](http://www.ffmpeg.org/ffmpeg-doc.html#SEC8)

> **Comments:**
> **username_0**: Thanks.  I tried your FFMPEG solution to see if there was any difference.  Resulting total bit rates as follows: 1st output: 42953kbps 2nd output: 42584kbps FFMPEG output: 42629kbps  

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