<p>Issue is with the audio track, which needs to be converted/compressed.</p>

<p>See</p>

<p><a href="https://sourceforge.net/p/vdfiltermod/tickets/162/" rel="nofollow noreferrer">https://sourceforge.net/p/vdfiltermod/tickets/162/</a></p>

<p>for steps on how to avoid this issue.</p>

CC BY-SA 4.0
2019-09-23T11:39:44.870Z
I already see the ticket 162, having written a comment on 2019-09-05 (17 days ago). I understand that direct copy always decodes audio as PCM https://sourceforge.net/p/vdfiltermod/wiki/direct_copy/
Pedro Polonia
CC BY-SA 4.0
2019-09-23T11:41:39.883Z
Accepted as answer
Pedro Polonia
CC BY-SA 4.0
2019-09-21T18:11:45.110Z
2019-09-21T18:11:45.110Z
Gordon Shumway
<p>For me, the solution was exactly as mentioned in the link in the second answer, all kudos to that site. I'll put the answer here explicitly to make sure it won't be lost:</p>
<p>You get pcm_f32 [error] because source audio is decoded in raw pcm (float).
To save audio in mp4 you need to select compatible compression:</p>
<ol>
<li>select Audio-&gt;Full processing mode</li>
<li>select Audio-&gt;Compression-&gt;FFMpeg AAC or FFMpeg Lame MP3</li>
</ol>

CC BY-SA 4.0
2024-02-09T15:50:07.177Z
2024-02-09T15:50:07.177Z
Putnik
<p>I have several long video files that I need to edit (remove some initial parts, breaks and dead moments) and I always got errors when I try to save / export the edited file in mp4. The</p>

<blockquote>
  <p>pcm_f32le: codec not currently supported in container mp4</p>
</blockquote>

<p>message shows when I try to save the edited file in VirtualDub2 (the original file was converted from wmv by VirtualDub2). I can edit an avi file (with 4:26 minutes and 914 Mb) but the edited avi is bigger (3:22 minutes and 2.3 Gb).</p>

<p>I have several Webex sessions (each with 4 – 5 hours) in arf and wmv format (I export using cisco Network Recording Player application).</p>

<p>The WMV files have the ASF (Active Streaming Format) container format, video 1440×768, 25 fps wmv3 video codec, yuv420p, 1000 Kb/sec bitrate. The audio is in stereo s16p, 44.100 Hz, 1152 kb/sec bitrate.</p>

<p>I also can convert the files with VirtualDub2 to mpg4 or Xvid minconverter to avi.</p>

<p>If I use VirtualDub2, the mp4 have the QuickTime/Mov container format, video 1440×768, with h264 video codec, 2.29 fps average, yuv420p (709) and the aac audio codec, stereo fltp, 33 kHz, 50 kb/sec bitrate.</p>

<p>If I use Xvid, the avi (Audio Video Interleaved) container have video 1440×768, mpeg4 video codec, yuv420p, 5 fps and mp3 audio, stereo s16p, 44.100 Hz, 128 kb/sec bitrate.</p>

<p>The unedited video export sizes are similar:</p>

<p>304 Mb arf is converted in a 801 Mb wmv that is compressed into a 509 mb avi or a 506 mb mp4 file.</p>

<p>What is wrong? What settings / log files should i preset/check/validate?</p>

CC BY-SA 4.0
2019-09-04T13:30:40.877Z
I am using windows 10 64 bits
Pedro Polonia
<video-editor><mp4><compression><avi><virtualdub>
error editing a long video using VirtualDub2
Pedro Polonia
# error editing a long video using VirtualDub2

(Asked by: username_0 on 2019-09-04)

I have several long video files that I need to edit (remove some initial parts, breaks and dead moments) and I always got errors when I try to save / export the edited file in mp4. The

> pcm\_f32le: codec not currently supported in container mp4

message shows when I try to save the edited file in VirtualDub2 (the original file was converted from wmv by VirtualDub2). I can edit an avi file (with 4:26 minutes and 914 Mb) but the edited avi is bigger (3:22 minutes and 2.3 Gb).

I have several Webex sessions (each with 4 – 5 hours) in arf and wmv format (I export using cisco Network Recording Player application).

The WMV files have the ASF (Active Streaming Format) container format, video 1440×768, 25 fps wmv3 video codec, yuv420p, 1000 Kb/sec bitrate. The audio is in stereo s16p, 44.100 Hz, 1152 kb/sec bitrate.

I also can convert the files with VirtualDub2 to mpg4 or Xvid minconverter to avi.

If I use VirtualDub2, the mp4 have the QuickTime/Mov container format, video 1440×768, with h264 video codec, 2.29 fps average, yuv420p (709) and the aac audio codec, stereo fltp, 33 kHz, 50 kb/sec bitrate.

If I use Xvid, the avi (Audio Video Interleaved) container have video 1440×768, mpeg4 video codec, yuv420p, 5 fps and mp3 audio, stereo s16p, 44.100 Hz, 128 kb/sec bitrate.

The unedited video export sizes are similar:

304 Mb arf is converted in a 801 Mb wmv that is compressed into a 509 mb avi or a 506 mb mp4 file.

What is wrong? What settings / log files should i preset/check/validate?

**Tags:** video-editor, mp4, compression, avi, virtualdub

> **Comments:**
> **username_0**: I am using windows 10 64 bits  

---

## 2 answers

### Answer by username_1 on 2019-09-21. Score: 2 | Accepted answer

Issue is with the audio track, which needs to be converted/compressed.

See

<https://sourceforge.net/p/vdfiltermod/tickets/162/>

for steps on how to avoid this issue.

> **Comments:**
> **username_0**: I already see the ticket 162, having written a comment on 2019-09-05 (17 days ago). I understand that direct copy always decodes audio as PCM https://sourceforge.net/p/vdfiltermod/wiki/direct_copy/  
> **username_0**: Accepted as answer  

---

### Answer by username_2 on 2024-02-09. Score: 0

For me, the solution was exactly as mentioned in the link in the second answer, all kudos to that site. I'll put the answer here explicitly to make sure it won't be lost:

You get pcm\_f32 [error] because source audio is decoded in raw pcm (float).
To save audio in mp4 you need to select compatible compression:

1. select Audio->Full processing mode
2. select Audio->Compression->FFMpeg AAC or FFMpeg Lame MP3


---

