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15th June 2021, 04:47 | #1 | Link |
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Audio capture
I've just been itching to make a post on this forum, but there was a waiting period to do so. I tried going on other sites in the meantime to pose the following inquiry but to no avail!
So, to make a long story short, AVerMedia capture cards are able to capture Dolby Digital noise in PCM format and it can be successfully be converted to bit-perfect AC3 DD 5.1 audio. Personally, I go with this simple command, and it would work every time: besplit -core -input 1.wav -type ddwav -output 1.ac3 Unfortunately though, AVerMedia's drivers have rendered the capture card I was using (Extremecap U3) pretty useless. I replaced it with an open-source, plug and play capture card, the Inogeni 4K2USB3. However, the conversion generates some... unsavoury results. It sounds the same on paper: https://twitter.com/MantaMorty/statu...332069376?s=20 But post-conversion, it's a LOT different: https://twitter.com/i/status/1402830530316492800 I'm told that this happens because the Inogeni card(s) re-sample the audio which is why the converted audio comes out messed up/corrupted. So, before I invest in yet another capture card, I'd like to get some confirmation that it WILL work with BeSplit for my type of audio work. I was keen towards the Elgato HD60 S, since it also has uncompressed capture capabilities, but I want you guys to let me know; If you do this kind of thing that I'm speaking of, what capture card are you doing it with? Heck, you don't even have to know first-hand, any insight would be great. Thanks, guys. Last edited by Arian; 15th June 2021 at 05:07. |
15th June 2021, 10:51 | #2 | Link | |
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Quote:
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BeHappy, AviSynth audio transcoder. |
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15th June 2021, 14:11 | #3 | Link | |
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.wav file: https://drive.google.com/file/d/1IYV...ew?usp=sharing .ac3 file: https://drive.google.com/file/d/1n4m...ew?usp=sharing |
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15th June 2021, 23:26 | #4 | Link |
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The file is corruput, the data does not make sense:
Code:
File ........: C:\Downloads\1.wav Size ........: 4038424 bytes ---------------------------------------------- Header Info ChunkID .....: RIFF RiffLength ..: 36 (ERROR: Must be Size - 8 = 4038416) Container ...: WAVE SubchunkID ..: fmt (Length: 16) AudioFormat .: 1 (Integer) NumChannels .: 2 SampleRate ..: 48000 ByteRate ....: 192000 BlockAlign ..: 32 BitsPerSample: 16 (WARNING: BlockAlign <> NumChannels x BistPerSample / 8 = 4) SubchunkID ..: data (Length: 4038384) Offset data .: 44 (WARNING: Audio data truncated: -4 bytes) Duration ....: 21.03323 sec., (0h. 0m. 21.03323s.) ------------------------------------------------- End Info Code:
eac3to v3.34 command line: "C:\Portable\eac3to\eac3to.exe" "C:\tmp\1(1).pcm" -progressnumbers -log="C:\Portable\eac3to\UsEac3to\UsEac3To.log" ------------------------------------------------------------------------------ This might be a RAW/PCM file. Trying to figure out the details. This will probably take a while. Please be patient... The RAW/PCM file seems to be little endian. The RAW/PCM file seems to have a bitdepth of 16 bits. The RAW/PCM file probably has 1, 2, 3, 4 or 5 channels. The most probable number of channels is 1. Please specify one of these via command line paramater.
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16th June 2021, 09:51 | #5 | Link |
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@Arian,
Out of interest... What audio capture options does your AVerMedia capture card offer?
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17th June 2021, 03:16 | #6 | Link | |
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17th June 2021, 03:18 | #7 | Link | |
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They have a few very lossy options when you use RECentral, their company produced and "recommended" capture software, but when using AmarecTV or VirtualDub, you just get the standard uncompressed 48kHz option and that's it. Do you think that's all I would need to get it to work with another brand? |
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17th June 2021, 09:45 | #8 | Link | |
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What is not right is the captures 'byte rate' which (according to tebasuna51's report) is '192,000'. Which is way too high! The 'byte rate' of a lossy Dolby Digital stream does not need to be any higher that '80,000' (ie: 640 Kbps). Cheers
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Last edited by SeeMoreDigital; 17th June 2021 at 11:25. |
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17th June 2021, 12:01 | #9 | Link | |
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If you have any prime examples of HDMI USB cards that would record in a sample rate of 48kHz, that would basically solve my dilemma here! |
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17th June 2021, 22:52 | #10 | Link |
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Please read my post again?
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18th June 2021, 08:19 | #12 | Link |
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As I mentioned previously...
According to tebasuna51's report it would appear that your capture device is already able to capture at 48kHz... It's the 'byte rate' that's too high. It needs lowering to 80,000.
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Last edited by SeeMoreDigital; 18th June 2021 at 08:22. |
21st June 2021, 07:40 | #17 | Link | |
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At times, uninstalling one driver and installing another works temporarily, but this is a constant and isn't always foolproof. Sometimes, you just just a black screen with no responsiveness whatsoever. So, ideally I'd like the name of a capture card where this whole operation isn't necessary. |
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13th February 2022, 19:31 | #18 | Link |
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Magewell Pro Capture HDMI will do perfectly fine
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26th February 2022, 16:14 | #19 | Link |
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As will do cheap Hifime UR23 SPDIF Optical to USB converter and Audacity build with ASIO
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