Duke Thanatos Posted March 9, 2016 Report Share Posted March 9, 2016 (edited) Hello everyone. I need to convert .flac audio (of an anime movie) to .aac to remux in an mkv. The reason i'm doing this is to reduce the file size. The software i'll be using is adobe audition. Can someone tell me what are the best settings like optimal bit rate, bit depth etc so that i don't mess this up. Also will it be better to convert my existing flac audio from 6 Ch 24bit to 5.1 16bit or maybe to convert it to Dolby Digital AC3 format. Any sort of assistance would be appreciated. Info about the Flac audio i wanna convert: Format : FLAC Format/Info : Free Lossless Audio Codec Duration : 2h 41mn Bit rate mode : Variable Bit rate : 2 777 Kbps Channel(s) : 6 channels Channel positions : Front: L C R, Side: L R, LFE Sampling rate : 48.0 KHz Bit depth : 24 bits Stream size : 3.14 GiB (100%) Writing library : libFLAC 1.2.1 (UTC 2007-09-17) Edited March 9, 2016 by Duke Thanatos Quote Link to comment Share on other sites More sharing options...
PDoggy77 Posted March 9, 2016 Report Share Posted March 9, 2016 I would encode to 448kbps AAC if you really need to save space - 384kbps is transparent, but I would still stick to 448kbps if you can store it. Quote Link to comment Share on other sites More sharing options...
ZeroPenguins Posted March 10, 2016 Report Share Posted March 10, 2016 Use the PopCorn converter... Works good if you want "One-Click", ez gg wp program. Quote Link to comment Share on other sites More sharing options...
Duke Thanatos Posted March 10, 2016 Author Report Share Posted March 10, 2016 7 hours ago, PDoggy77 said: I would encode to 448kbps AAC if you really need to save space - 384kbps is transparent, but I would still stick to 448kbps if you can store it. The thing is that i really don't need to save space cause any AAC file i convert it to is going to be less then 1gb. The Flac audio i have right now is just absurd 3gb. I would like to know the best possible settings for AAC. Thanks. Quote Link to comment Share on other sites More sharing options...
Koby Posted March 10, 2016 Report Share Posted March 10, 2016 8 minutes ago, Duke Thanatos said: The thing is that i really don't need to save space cause any AAC file i convert it to is going to be less then 1gb. The Flac audio i have right now is just absurd 3gb. I would like to know the best possible settings for AAC. Thanks. Then just go with 448kbps AAC for 5.1 If space was a huge issue, I'd suggest going as low as 320kbps for 5.1, but not any lower. There isn't really any reason to go higher than 448kbps tbh. Though really encoding by bitrate typically isn't the way to do it. Most would use quality setting rather than bitrate; which would give you VBR instead of CBR. Something like 0.8 would be sufficient; but I wouldn't go less than 0.5 while 1.0 would be transparent. 2 Quote Link to comment Share on other sites More sharing options...
Duke Thanatos Posted March 10, 2016 Author Report Share Posted March 10, 2016 3 hours ago, ZeroPenguins said: Use the PopCorn converter... Works good if you want "One-Click", ez gg wp program. Is this what anime encoders use? Quote Link to comment Share on other sites More sharing options...
Duke Thanatos Posted March 10, 2016 Author Report Share Posted March 10, 2016 6 minutes ago, Koby said: Then just go with 448kbps AAC for 5.1 If space was a huge issue, I'd suggest going as low as 320kbps for 5.1, but not any lower. There isn't really any reason to go higher than 448kbps tbh. Though really encoding by bitrate typically isn't the way to do it. Most would use quality setting rather than bitrate; which would give you VBR instead of CBR. Something like 0.8 would be sufficient; but I wouldn't go less than 0.5 while 1.0 would be transparent. Thanks. This cleared up alot... Just one thing left, Adobe audition doesn't have any setting for VBR so can you refer a software commonly used by anime encoders... Quote Link to comment Share on other sites More sharing options...
Koby Posted March 10, 2016 Report Share Posted March 10, 2016 Just now, Duke Thanatos said: Thanks. This cleared up alot... Just one thing left, Adobe audition doesn't have any setting for VBR so can you refer a software commonly used by anime encoders... I don't use a GUI. I encode audio usually using ffmpeg.exe CLI Take a look here: https://trac.ffmpeg.org/wiki/Encode/AAC 1 Quote Link to comment Share on other sites More sharing options...
Duke Thanatos Posted March 10, 2016 Author Report Share Posted March 10, 2016 10 hours ago, Koby said: I don't use a GUI. I encode audio usually using ffmpeg.exe CLI Take a look here: https://trac.ffmpeg.org/wiki/Encode/AAC This software looks promising, Thanks ! Quote Link to comment Share on other sites More sharing options...
JohnFlower Posted March 10, 2016 Report Share Posted March 10, 2016 Standard builds from ffmpeg's website wont include non-free AAC codecs. Quote Link to comment Share on other sites More sharing options...
Duke Thanatos Posted March 10, 2016 Author Report Share Posted March 10, 2016 6 minutes ago, JohnFlower said: Standard builds from ffmpeg's website wont include non-free AAC codecs. Non-free codecs as in i'll have to pay for them? Quote Link to comment Share on other sites More sharing options...
JohnFlower Posted March 11, 2016 Report Share Posted March 11, 2016 You don't have to pay, but licensing issues prevent ffmpeg from distributing builds with non-free codecs enabled. Quote Link to comment Share on other sites More sharing options...
ZeroPenguins Posted March 11, 2016 Report Share Posted March 11, 2016 On 10/3/2016 at 1:37 PM, Duke Thanatos said: The thing is that i really don't need to save space cause any AAC file i convert it to is going to be less then 1gb. The Flac audio i have right now is just absurd 3gb. I would like to know the best possible settings for AAC. Thanks. No, but it's convenient. I used it back in the past for some bloated encodes where the audio took up a lot of space. *cough*coalgirls*cough* bloated days... 1 Quote Link to comment Share on other sites More sharing options...
Duke Thanatos Posted March 11, 2016 Author Report Share Posted March 11, 2016 3 hours ago, ZeroPenguins said: No, but it's convenient. I used it back in the past for some bloated encodes where the audio took up a lot of space. *cough*coalgirls*cough* bloated days... Hahaha yeah Coalgirls audio is always too big in size. One last thing, how is the quality of the final encode with the PopCorn converter cause i don't want to compromise on the fidelity of the audio. Quote Link to comment Share on other sites More sharing options...
ZeroPenguins Posted March 13, 2016 Report Share Posted March 13, 2016 Seems fine to me, you can use different encoders on that program. I just use the highest bitrate when I reencode from FLAC. Quote Link to comment Share on other sites More sharing options...
jessex1990 Posted March 14, 2016 Report Share Posted March 14, 2016 If space is a big issue and your not playing it back on a home cinema system why not just use the normal stereo track (if it comes with one) and discard the surround sound track completely? Quote Link to comment Share on other sites More sharing options...
ZeroPenguins Posted March 15, 2016 Report Share Posted March 15, 2016 Technically speaking, a lot of Japanese audio sources are already 2.0. The only one that are 5.1 are mostly the American market. Personally I prefer 2.0 with decent headphones over any 5.1 bullshit. 2 Quote Link to comment Share on other sites More sharing options...
Duke Thanatos Posted March 18, 2016 Author Report Share Posted March 18, 2016 On 3/13/2016 at 1:31 AM, ZeroPenguins said: Seems fine to me, you can use different encoders on that program. I just use the highest bitrate when I reencode from FLAC. Thanks again for the info i was out of town for the week, will encode audio today and share results here... Quote Link to comment Share on other sites More sharing options...
Duke Thanatos Posted March 18, 2016 Author Report Share Posted March 18, 2016 On 3/14/2016 at 7:30 PM, jessex1990 said: If space is a big issue and your not playing it back on a home cinema system why not just use the normal stereo track (if it comes with one) and discard the surround sound track completely? There are only 2 track. 1 Jap and 1 Eng and both are too heavy at around 3.2 gb each. All i have to do is rencode them to something practical and remux them in the mkv Quote Link to comment Share on other sites More sharing options...
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