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2nd November 2011, 23:09 | #481 | Link |
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AFAIK, VBR mode woks just fine without -b and -B. In that case LAME will simply use its default minimum/maximum bitrates for your 'VBR' quality value.
So IMO you shouldn't overwrite these, unless you have a very good reason to do so. The documentation even states that "the use of -B is NOT RECOMMENDED". Also, as mentioned before, the lowest bitrate allowed in MP3, according to MPEG-1, is 32 kbps. Even lower bitrates are only supported with MPEG-2 extensions. And even then only for 16, 22.05 and 24 kHz, but not for the more common sample rates, like 44.1 or 48 kHz. Last but not least and most important: I encoded a 44.1 kHz file with LAME and "-V9" (no other options set!). LAME encoded at 22.05 kHz. The output MP3 file did contain 8, 16 and 24 kbps frames! Hence LAME will automatically downsample the input for such ultra-low quality settings. And, if it does so, it will make use of the lowest bitrates - even without '-b' option (BTW: You may want to check out MPEG Audio Info, which gives detailed per-frame info, to analyze the output MP3 files.)
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2nd November 2011, 23:59 | #482 | Link |
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Out of curiosity I gave the FHG aac encoder a shot.
Maybe this has been adressed before: Why is the slider in the compression settings tab only working at insane intervalls? From level 0.50 to 0.9 there is almost no increase in bitrate and even 1.0 is giving me a file undersized compared to the source. The FHG files are from the newest 5.622 Winamp. Back to nero for now. |
3rd November 2011, 00:28 | #483 | Link | |
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All that LameXP can do is passing options to the API provided by the encoder. And the VBR quality selector of the FHG encoder is relatively coarse-grained: The quality value can be selected between 1 and 5, integer (whole numbers) only. The quality selector of the Nero encoder is much more fine-grained, as you know... (Note that the quality slider in LameXP was designed for Nero AAC. For FHG AAC the values in range 0.0 to 1.0 are mapped to 1...5 in a linear fashion)
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3rd November 2011, 01:39 | #484 | Link | |
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However, I am aware that I am utilizing MPEG-2.5 extensions. Maybe LAMExp should have another checkbox under the Additional Options tab in the channel mode/sampling rate box called "Enable MPEG-2.5". When such a box is checked, 8, 11.025 and 12 kHz should be available in the sample rate pull-down box. I suggest also that the minimum bitrate field be set to 8 when MPEG-2.5 is enabled. The application is not theoretical but that of mp3 audiobooks and voice recordings. |
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4th November 2011, 11:20 | #486 | Link | |
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6th November 2011, 10:17 | #487 | Link | ||
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6th November 2011, 13:38 | #488 | Link | |
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Interestingly the "Symantec" scanner, which is the company behind "Norton", also confirms that the file is clean. Maybe the issue has already been fixed ???
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11th November 2011, 09:38 | #490 | Link | ||
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Cheers manolito |
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11th November 2011, 12:17 | #491 | Link | |
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It does not compress the dynamic range "inside" on channel. That is: All samples in one channel will always be amplified by the same factor. However one channel may be amplified stronger than the other ones, which possibly (not necessarily) changes the dynamic range "between" the channels - that may be desired or not. (Be aware that, due to a bug(?) in SoX, the plain "-n" option files for some files, which was all the reason to use "-nb" by default)
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11th November 2011, 14:27 | #492 | Link | ||
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http://sox.sourceforge.net/Docs/Bugs The recommended workaround is: Quote:
Which makes me think if it would be a good idea to ditch SoX for normalizing altogether... Cheers manolito |
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11th November 2011, 15:12 | #493 | Link |
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I think that's another issue.
LameXP already tells SoX to put temporary files into the LameXP Temp folder, which lies inside %TEMP% and therefore has no problems with file permissions. The problem is more that normalization with just "-n" works most of the time, but sometimes creates an empty file without an error message... (BTW: Whoever tries to create a sub-folder for temporary files in the Root folder of the system drive and then wonders about missing permissions doesn't have a clue. That wouldn't work on a Unix system either - at least not without using 'sudo'. It's certainly not a Vista/UAC-specific issue)
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11th November 2011, 18:09 | #494 | Link | |
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I did many tests to determine this behavior, and these tests were done from the SoX command line (completely outside of LameXP). For 6-ch wav files the error was always something like "Could not create temporary device". Cheers manolito |
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11th November 2011, 18:29 | #495 | Link |
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Well, I was able to reproduce the problem with some multi-channel (here I mean: more than two channels) files, but not with all. Also I never saw an error message, only an empty file.
If you see "Could not create temporary device", then please try with --temp . so that SoX will put the Temp file into the current directory...
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12th November 2011, 08:19 | #496 | Link |
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I notice that sometimes normalizing by peak don't work well, analyzing the result file with audition it finds peaks over -0.5dB..
Edit: It's a lack of lossy compression
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powered by Google Translator Last edited by Motenai Yoda; 12th November 2011 at 09:02. |
12th November 2011, 10:04 | #497 | Link |
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Thanks for the new version... But I get this error when I tried to encode a mp3 with album art..
unsupported image: 'C:\Users\*****\AppData\Local\Temp\7f6f2bd55a3e4905a01d7d2723996b41\735d2eb984d746819396f5d3289e3cf8.jpg'. Specify JPEG/PNG/GIF image Exited with code: 0x0001 Does't lame support jpg at all? or is it just a problem with this file? |
12th November 2011, 12:35 | #498 | Link |
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Hello, Hobbe. As you didn't post the complete log, it's a bit hard to guess.
But it looks like LameXP (or MediaInfo to be more precise) found a JPEG image in the input file (or you manually added cover art in LameXP's MetaInfo editor), but then the encoder (LAME?) refused to embed that picture into the output file. Unless you provide an example, I can only speculate that either the JPEG file is broken/incomplete somehow or what appears to be a JPEG file at first glance turns out to not be a JPEG file... (You may want to open 'C:\Users\John Doe\AppData\Local\Temp\xxxx\yyyy.jpg' in IrfanView and check what happens)
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12th November 2011, 13:16 | #499 | Link |
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Thanks... I did use mp3tag to add album art. This time I scaled down the picture to a smaller size and readded the art and now it works.. strange..
Can I add album art directly in LameXP? if so... how? =) Any plans to make it possible to use Quicktime encoder? |
12th November 2011, 13:30 | #500 | Link | |
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You probably mean the QuickTime/iTunes AAC encoder? Well, I certainly can't include the QuickTime AAC encoder with LameXP due to licensing issues. If there is some OpenSource CLI front-end available for QuickTime AAC, I could add support for that in a similar way to FHG AAC encoder. Which means that people would still have to download and install QuickTime from the official web-site. Then copy the encoder DLL's to the correct place manually. But due to a deep-rooted antipathy against QuickTime products, that probably won't happen soon
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Tags |
aac, aotuv, flac, lame, lamexp, mp3, mp4, ogg, oggenc, opus, vorbis |
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