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5th November 2022, 01:14 | #261 | Link |
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"The core 1509 Kb/s is accepted to be passed by SPDIF"
Also a bug: https://trac.ffmpeg.org/ticket/7730#comment:1 |
31st January 2023, 11:52 | #262 | Link | |
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Anyway, DEE is lossless but bigger than DME SE, so whatever. Last edited by Balling; 11th April 2023 at 19:55. |
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31st January 2023, 16:52 | #264 | Link |
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Agreed... How about splitting all the DTS Q&A's out of this topic into their own topic?
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Last edited by SeeMoreDigital; 31st January 2023 at 22:13. |
4th March 2023, 06:28 | #265 | Link |
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Apparently EAC3 from Youtube app only works on my Galaxy S22 Ultra if it has Atmos action icon enabled. Nice. In fact if you disable it app switches to opus seamlessly, ON THE FLY. Nuts, Google knows how to code?! Tested on the new infamous video: https://youtu.be/MbdVuStrEV8
Also, apparently mp4 files must have special secret spatial atom for atmos to be recognized on Android https://trac.ffmpeg.org/ticket/9996#comment:5 No, ffmpeg does not write it, but since these two commits it now recognizes atmos EAC3 JOC and TrueHD which allows to write code for this issue. https://github.com/FFmpeg/FFmpeg/com...b787575e5c32f2 https://github.com/FFmpeg/FFmpeg/com...90d391450c4e60 Last edited by Balling; 4th March 2023 at 06:34. |
9th September 2023, 17:46 | #267 | Link |
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Are you able to provide a download link to your sample encode?
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9th September 2023, 20:35 | #268 | Link | |
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I don't know for what you quote my post about an Audition encode. Audition CC 2017 can't create eac3 files with ac3 core, maybe your eac3 7.1 track was created with other encoder. And yes, eac3 tracks can have frames 5.1 ac3 inside (core) and extra frames until 7.1.
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9th September 2023, 22:24 | #269 | Link | |
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https://drive.filen.io/d/809c1db3-a5...5XreuPkh3DX7CC |
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9th September 2023, 22:49 | #270 | Link | |
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I used Audition CC 2017 with channel mapping and parameters. eac3to reads that file as follows: E-AC3, 7.1 channels, 0:01:35, 896kbps, 48kHz (core: E-AC3, 5.1 channels, 0:01:35, 502kbps, 48kHz) |
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10th September 2023, 11:07 | #271 | Link |
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Your link don't work for me but you are right.
Sorry, my mistake is read AC3 core instead E-AC3 core like you say. An EAC3 stream can have 3 types of frames: 0 Independents 1 Dependents 2 AC3 When it have AC3 frames we can extract the AC3 core, but we can extract the EAC3 core extracting the independents frames. The Dependent frames have the extra channels/bitrate I make a eac3 7.1 sample and I extract the eac3 core with eac3to. With my tool LeeAudBi you can compare the info: Code:
File: 7.1.ec3 File: 7.1_core.eac3 Size: 2243584 bytes Size: 1257008 bytes ----------------------------------------- First Frame Info ----------------------------------------- First Frame Info StrmTyp .....................: 0 (0=Ind, 1=Dep, 2=AC3) StrmTyp .....................: 0 (0=Ind, 1=Dep, 2=AC3) SubStreamID .................: 0 SubStreamID .................: 0 FrameSize....................: 2008 bytes (502 Kb/s) FrameSize....................: 2008 bytes (502 Kb/s) SampleRate ..................: 0 (48000 Hz) SampleRate ..................: 0 (48000 Hz) NumBlksCod ..................: 3 (6 Blocks) NumBlksCod ..................: 3 (6 Blocks) Audio coding mode (acmod) ...: 7 (3/2 - L, C, R, SL, SR) Audio coding mode (acmod) ...: 7 (3/2 - L, C, R, SL, SR) Low frequency effects channel: 1 (Present) Low frequency effects channel: 1 (Present) Version (bsid) ..............: 16 (Enhanced sintax) Version (bsid) ..............: 16 (Enhanced sintax) Dialogue normalization ......: -31 dB Dialogue normalization ......: -31 dB Dynamic Range gain ..........: -0.27 dB Dynamic Range gain ..........: -0.27 dB Mixing metadata exist (ignoring rest) Mixing metadata exist (ignoring rest) ----------------------------------------- Revised EAC3 Info ----------------------------------------- Revised EAC3 Info Dyn. Range min/max : -10.55/3.34 dB Dyn. Range min/max : -10.55/3.34 dB Frames Tot/Ind/AC3.: 1252 / 626 / 0 Frames Tot/Ind/AC3.: 626 / 626 / 0 Bitrate average... : 896 Kb/s (Bitrate ...........: 502 Kb/s) Duration ..........: 20032 ms (0 h. 0 m. 20.032 s.) Duration ..........: 20032 ms (0 h. 0 m. 20.032 s.) ------------------------------------------------- End Info ------------------------------------------------- End Info The 7.1_core have only the 626 independents frames 5.1 with the fix bitrate of 502 Kb/s and less size of course. But don't exist AC3 frames like others encoders can create.
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10th September 2023, 15:32 | #272 | Link | |
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I understand, I just have a question. EAC3 to WAV64 file in eac3/GUI: E-AC3, 7.1 channels, 0:01:35, 896kbps, 48kHz (core: E-AC3, 5.1 channels, 0:01:35, 502kbps, 48kHz) Extracting E-AC3 core... Decoding with libav/ffmpeg... Reducing depth from 64 to 24 bits... Writing W64... Creating file "C:\Test\Dolby_EAC3_7.1_track.eac3_.w64"... eac3to processing took 1 second. Done. What command should I use to convert the main 7.1 audio? Foobar2000/FFmpeg decodes it correctly. |
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10th September 2023, 19:57 | #273 | Link |
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What GUI?
The libav decoder in eac3to is very old (2015) and don't support decode dependent frames, use always ffmpeg. With the UsEac3to GUI you must use the 'A/V Recode' button to decode/recode EAC3 with ffmpeg.
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10th September 2023, 21:03 | #274 | Link | |
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Any additional suggestions for encoding from Audition? |
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11th September 2023, 10:41 | #275 | Link |
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You have the options I use in this post
But, like I have a audio system 5.1.2 and not 7.1, I use it to recode atmos tracks, decodec with this, to L R C LFE Ls Rs Vhl Vhr. That 5.1.2 eac3 is not well recognized by eac3to: E-AC3, 5.1 channels, 0:00:20, 896kbps, 48kHz (core: E-AC3, 5.1 channels, 0:00:20, 502kbps, 48kHz) But yes by MediaInfo: L R C LFE Ls Rs Tfl Tfr And well decoded with ffmpeg to wav: FL FR FC LF SL SR TFL TFR And well played by my Denon configured like 5.1.2 The core 5.1 of the 7.1 eac3 have the Side and Back channels mixed. The core 5.1 of the 5.1.2 eac3 have the Top channels mixed with the Front channels. I think it is a correct downmix.
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11th September 2023, 15:55 | #276 | Link | |
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Thanks again. |
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2nd October 2023, 21:42 | #277 | Link | |
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Does anyone know which would be the best/most useful way to convert a Atmos 7.1 THD track to a DDP 5.1 track? How can I mantain most of the original quality & channel information?
so far Ive used UsEac3to with A/V recode with audio set to DDP 1024 and additional ffmpeg command line '71-51c' Quote:
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13th October 2023, 17:35 | #280 | Link | |
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An AC3 5.1 stream extended to have more channels (as encountered in Blu-Ray). An E-AC3 5.1 stream (which allows conversion to AC3 with minimal quality loss for output via SPDIF by E-AC3 compatible devices), for those cases bandwidth savings are critical, as encountered in some EU broadcasts. An E-AC3 5.1 stream extended to have more channels or even object audio (as seen in Netflix, which is used to provided Dolby Digital Plus Atmos). --- And I just realised I have one question: Can you take an AC3 stream and extend it with Atmos? This should allow for low-bitrate (lossy) Atmos on Blu-Ray using just one audio stream. |
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