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Old 23rd May 2022, 19:52   #1761  |  Link
bigdog660
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Hi, I've been trying to convert AAC in a MP4 container to MP3. I get the following error:

LameXP v4.19 (Build #2320), compiled on 2021-08-29 at 18:25:44

-------------------------------

The format of this file is NOT supported:
C:/Users/rgeer/Downloads/test.mp4

Container Format: dash
Audio Format: Type: AAC, Profile: LC, Bitrate: 126 kbps

Media info gives me this:

General
Complete name : C:\Users\rgeer\Downloads\test.mp4
Format : dash
Codec ID : dash (iso6/mp41)
File size : 3.87 MiB
Duration : 4 min 15 s
Overall bit rate : 127 kb/s
Encoded date : UTC 2017-03-21 21:11:13
Tagged date : UTC 2017-03-21 21:11:13

Audio
ID : 1
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 4 min 15 s
Bit rate : 126 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 44.1 kHz
Frame rate : 43.066 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 3.82 MiB (99%)
Encoded date : UTC 2017-03-21 21:11:13
Tagged date : UTC 2017-03-21 21:11:13

Is there any chance this may be fixed or feature added in the future? Thanks!
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Old 23rd May 2022, 22:16   #1762  |  Link
manolito
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You can find information and methods to open this DASH format here:
https://filext.com/file-extension/DASH
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Old 24th May 2022, 00:22   #1763  |  Link
LoRd_MuldeR
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Even though your file has a .mp4 file extension, it's not a "regular" MP4 container, but DASH format. This format is not currently supported

I don't know whether FAAD supports this kind of file, but I doubt it. If it does, then support for DASH input could be added to LameXP. You could always try yourself:
Code:
faad.exe -o output.wav your_input.mp4
If FAAD cannot handle this kind of file directly, maybe you could use MP4box to demux the AAC stream?
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Last edited by LoRd_MuldeR; 24th May 2022 at 00:29.
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Old 24th May 2022, 07:28   #1764  |  Link
lvqcl
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IIRC it's possible to remux it from DASH-MP4 to regular MP4 using ffmpeg.
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Old 25th May 2022, 14:09   #1765  |  Link
bigdog660
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Thanks for all the info guys. ffmpeg does the job, but I was liking the LameXP GUI. I finally used my head, and found a ffmpeg GUI that works well enough for DASH to MP3 conversion. For kicks and giggles, I'll give FAAD and MP4box try and report back soon. Been a long time since I've used them independently.
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Old 25th May 2022, 15:38   #1766  |  Link
SeeMoreDigital
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Why not de-mux the elementary AAC audio stream out of the .mp4 container prior to re-encoding to .mp3?

EDIT: That being said... Why bother re-encoding to mp3 when LC-AAC at the same bit-rate is superior?!
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Last edited by SeeMoreDigital; 27th May 2022 at 10:05.
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Old 27th May 2022, 08:23   #1767  |  Link
mike20021969
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Hi.

With AAC encoding:
Could you include as an additional option format ADTS (Audio Data Transport Stream) with an .aac file extension?
Thanks.
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Old 27th May 2022, 12:46   #1768  |  Link
LoRd_MuldeR
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It appears that QAAC has an option to output ADTS, but neither FDKAAC nur NeroAAC has such option.

Why would you need ADTS anyway? MP4 is, by far, the most widely used standard container for AAC. Also, you can always demux from the MP4 container, e.g. by using MP4Box.
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Old 19th June 2022, 14:05   #1769  |  Link
LoRd_MuldeR
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LameXP v4.20 Beta-2
https://sourceforge.net/projects/lam...29/2022-06-19/

Quote:
Changes between v4.19 and v4.20:
* Updated MediaInfo to v22.03 (2022-03-31), compiled with ICL 2021.2 and MSVC 15.9
* Implemented workaround for DwmEnableBlurBehindWindow() not working on Windows 11
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Old 18th July 2022, 23:32   #1770  |  Link
shades
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Request

Dear LoRd_Mulder!

I hope you are well!
I have a feature request, perhaps you could consider please?

When converting to .wav on the slider it just says, (uncompressed) for obvious reasons.
Could this be changed to (samplerate) and do a up-downsample conversion and maybe a Stereo/Mono selector?

This would make this an extremely useful tool for me. I need to change samplerates and mono conversion all the time working with stems etc.

Thanks for your time working on this great tool.
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