eac3to - audio conversion tool

[tebasuna51]

Originally Posted by sreemv

...
libav ERROR: block code look-up failed
...
Applying -12.53dB gain...
...

Your extracted dts seems damaged.
Try fix it with DelayCut.
Put here the log if there are errors.

Encoding DTS <1536kbps> with Surcode...
Found Surcode DTS Encoder version 1.0.29.0.
Pressing the Surcode "Encode" button didn't seem to work...
Closing Surcode...

Is there a way to save the frame converted "wavs" and use the "surcode" independently? eac3to keeps deleting them after the above failure.

Yes, use:
eac3to input.dts output.wavs -23.976 -changeTo24.000

eac3to "original.mkv"
MKV, 1 video track, 1 subtitle track, 2:11:21, 24p /1.001
1: h264/AVC, 1920x818 24p /1.001 (960:409)
2: Subtitle (SRT)

Your mkv is 23.976, in theory you don't need change the audio duration.

[sreemv]

Originally Posted by tebasuna51

Your extracted dts seems damaged.
Try fix it with DelayCut.
Put here the log if there are errors.

I dont see any option in "delaycut" [v1.2.12.] for verifying/fixing - the "crc errors" section is grayed out once I load the "dts" as the "input file" - I must be missing something?

Yes, use:
eac3to input.dts output.wavs -23.976 -changeTo24.000

Doh! I should have guessed that - very similar to what I was doing with LPCM-to-DTS - thanks

Your mkv is 23.976, in theory you don't need change the audio duration.

Hmmm....this is frustrating - at the beginning of the movie, audio appears lagging and then few minutes in the audio goes ahead without me changing anything...*scratch-head*

Thanks again for all your help!

[sreemv]

Originally Posted by tebasuna51

Your extracted dts seems damaged.
Try fix it with DelayCut.
Put here the log if there are errors.

Doh! Looks like delaycut appears to by default run a fixer algorithm? Didnt see any errors:

====== INPUT FILE INFO ========================
File is dts
Bitrate (kbit/s) 1536
Act rate (kbit/s) 1509.750
File size (bytes) 1427019726
Channels mode C+L+R+SL+SR
Sampling Frec 48000
Low Frec Effects LFE: Present
Duration 02:06:01.621
Frame length (ms) 10.666667
Frames/second 93.750000
Num of frames 708902
Bytes per Frame 2013.0000
Size % Framesize 0
CRC present: NO
=============================================
====== TARGET FILE INFO ======================
Start Frame 0
End Frame 708901
Num of Frames 708902
Duration 02:06:01.621
NotFixedDelay 0.0000
=============================================
====== PROCESSING LOG ======================
Number of written frames = 708902
Number of Errors= 0

[acki]

Quick question. If you want to convert audio from a 25fps sample to a 23.976 sample... does it make any difference if you use:

-slowdown          convert 25.000 and 24.000 content to 23.976 fps

or either

-23.976/...        define source fps to be "23.976", "24.000", "25.000", ...
-changeTo24.000    change source fps to "23.976", "24.000", "25.000", ...

Being in this last case -25.000 -changeTo23.976 ?

Which one should be more apropriate ?

[tebasuna51]

Originally Posted by sreemv

...
Hmmm....this is frustrating - at the beginning of the movie, audio appears lagging and then few minutes in the audio goes ahead without me changing anything...*scratch-head*

You have:

MKV, 1 video track, 1 subtitle track, 2:11:21, 24p /1.001
DTS, 5.1 channels, 2:06:02, 24 bits, 1510kbps, 48kHz

If you are sure than mkv and dvd movie is the same version (can be normal, extended, director's cut, ...), with same title credits also, the duration suggest you need a a more strong conversion like 25 -> 23.976 :

MKV: 7881 seconds
DTS: 7562 seconds
7562 x 25 / (24/1.001) = 7884

[tebasuna51]

Originally Posted by acki

...
-slowdown convert 25.000 and 24.000 content to 23.976 fps
...
Being in this last case -25.000 -changeTo23.976 ?

Absolutely equivalent.

[acki]

Originally Posted by tebasuna51

Absolutely equivalent.

OK, Gracias Thanks for the info.

[sreemv]

Originally Posted by tebasuna51

You have:

MKV, 1 video track, 1 subtitle track, 2:11:21, 24p /1.001
DTS, 5.1 channels, 2:06:02, 24 bits, 1510kbps, 48kHz

If you are sure than mkv and dvd movie is the same version (can be normal, extended, director's cut, ...), with same title credits also, the duration suggest you need a a more strong conversion like 25 -> 23.976 :

MKV: 7881 seconds
DTS: 7562 seconds
7562 x 25 / (24/1.001) = 7884

Absolutely positvely same movie - no special director cut or extended - just that they are sloppy during credits at the beginnig and end of the movies, there is no audio for few seconds.

Can you suggest a way to find the exact timecodes for where the audio starts and end on the dvd?

[sreemv]

I may have found the root of my problem - notice below different vob files appear to have different audio lags? Also - whats the duration printed at the end of the first line for each vob? what does that represent - please help! THANKS for all the expert advice!

N:\RipBot264v1.16.3\Tools\eac3to>eac3to N:\Original\VIDEO_TS\VTS_01_1.VOB
VOB, 1 video track, 1 audio track, 0:02:55
1: MPEG2, 480i60 /1.001 (16:9)
2: DTS, 5.1 channels, 24 bits, 1510kbps, 48kHz

N:\RipBot264v1.16.3\Tools\eac3to>eac3to N:\Original\VIDEO_TS\VTS_01_2.VOB
MPG, 1 video track, 1 audio track, 0:00:33
1: MPEG2, 480i60 /1.001 (16:9)
2: DTS, 5.1 channels, 24 bits, 1510kbps, 48kHz, -343ms

N:\RipBot264v1.16.3\Tools\eac3to>eac3to N:\Original\VIDEO_TS\VTS_01_3.VOB
MPG, 1 video track, 1 audio track, 0:01:55
1: MPEG2, 480i60 /1.001 (16:9)
2: DTS, 5.1 channels, 24 bits, 1510kbps, 48kHz, -376ms

N:\RipBot264v1.16.3\Tools\eac3to>eac3to N:\Original\VIDEO_TS\VTS_01_4.VOB
MPG, 1 video track, 1 audio track, 13:14:56
1: MPEG2, 480i60 /1.001 (16:9)
2: DTS, 5.1 channels, 24 bits, 1510kbps, 48kHz, -378ms

N:\RipBot264v1.16.3\Tools\eac3to>eac3to N:\Original\VIDEO_TS\VTS_01_5.VOB
MPG, 1 video track, 1 audio track, 13:13:51
1: MPEG2, 480i60 /1.001 (16:9)
2: DTS, 5.1 channels, 24 bits, 1510kbps, 48kHz, -482ms

N:\RipBot264v1.16.3\Tools\eac3to>eac3to N:\Original\VIDEO_TS\VTS_01_6.VOB
MPG, 1 video track, 1 audio track, 0:07:43
1: MPEG2, 480i60 /1.001 (16:9)
2: DTS, 5.1 channels, 24 bits, 1510kbps, 48kHz, -327ms

N:\RipBot264v1.16.3\Tools\eac3to>eac3to N:\Original\VIDEO_TS\VTS_01_7.VOB
MPG, 1 video track, 1 audio track, 13:13:10
1: MPEG2, 480i60 /1.001 (16:9)
2: DTS, 5.1 channels, 24 bits, 1510kbps, 48kHz, -236ms

N:\RipBot264v1.16.3\Tools\eac3to>

Do I need to account for different delays for different vobs? Or am I barking up the wrong tree?

[tebasuna51]

Use:
eac3to N:\Original\VIDEO_TS\VTS_01_1.VOB+...+N:\Original\VIDEO_TS\VTS_01_7.VOB

[Inspector.Gadget]

If things are still out of sync: Try demuxing the entire title with DGIndex to see if eac3to gives you the same output (e.g., load the VOBs 1-7 in order into DGIndex, make sure "demux all streams" is selected for audio, and run it. It'll print a delay value to the file name of the outputted DTS file.

There is another potential problem with audio from a DVD:

So far as I know, neither DGIndex nor eac3to can automatically correct a series of VOBs that either contains more than one title (a trailer at the beginning, etc.) or a blank cell in VOB 1 which consists of a few seconds of black screen and no audio. Either one will wreck delay values for the whole movie. The thing to do if you have a video-only cell near the beginning is to set DGIndex's first marker to the first frame of actual content (first frame that isn't totally black) and demux from there; that will correct the audio delay so it starts where that frame does, except for limitations built into the audio codec which may leave you with a remaining value of some milliseconds (again printed to the file name of the output audio).

The way to handle a multi-title VOB set is to run PGCDemux against a complete decrypted copy of the original DVD and make sure it runs in the PGC and Title domain (two select boxes). Your output will be only the movie, and you can pass that to DGIndex or eac3to without further problems.

[tebasuna51]

Originally Posted by Inspector.Gadget

...
There is another potential problem with audio from a DVD:

So far as I know, neither DGIndex nor eac3to can automatically correct a series of VOBs that either contains more than one title (a trailer at the beginning, etc.)

I agree. Of course you need extract from DVD only the Title for main movie with DVDDecrypter or PGCDemux or other tool.

or a blank cell in VOB 1 which consists of a few seconds of black screen and no audio...

About this problem I always have a doubt.
The workaround explained for DGIndex is clear: the delay printed in audio extracted file is related to the .d2v video index created.
But I'm not sure how eac3to manage this problem.

Anyway you can't know if you need a different initial delay to match BD video and must be verified always.

But the problem with delays between VOB files (overlap) is managed correctly (I think) by both tools.

[alex_t]

Hi everybody and madshi.

First, BIG THANKS madshi for this software !

I would like to report here a bug (I think it is but I'm not sure). Revision is 3.24.

I wanted to convert a Blu-ray 23.976 in 25.000 FPS. The command was as below:

eact3to blu-ray_directory 1) 2: k:\movie.mkv 3: k:\audio.flac 13: k:\subtitle.sup -speedup

Conversion for audio was : DTS HD MA to FLAC with dts arcsoft decoder

During the 1st pass, clipping has been detected by eac3to and a 2nd pass has been done.

During the 1st pass: a message said 'convert 23.976 to 25.000'

But at the end of 2nd pass, a message said 'fps at 23.976 has been added in MKV header' (something like this)

Result was that the FPS remained at 23.976. I use MPC HC as player.

I would like to change 23.976 FPS into 25.000 FPS with eac3to. May be I did not use the good -option (I used -speedup)

What is the difference between -speedup and -changeTo25.000 ?

Thanks

Regards
(sorry for my english)

[nurbs]

I haven't used speedup myself, but normally you have to put the options next to the track you want to use them on, e.g.
eac3to blu-ray_directory 1) 2: k:\movie.mkv -speedup 3: k:\audio.flac -speedup 13: k:\subtitle.sup -speedup (I don't know if this actually works for subtitles)

May I ask why you want to convert the framerate?
It's usually more trouble than it's worth and converting from 23.976 to 25 is almost never necessary.

[TinTime]

Originally Posted by tebasuna51

But the problem with delays between VOB files (overlap) is managed correctly (I think) by both tools.

I've had occasional problems with eac3to and DVDs ("A Good Year" was one) so I always use DGIndex for demuxing DVDs.

[Inspector.Gadget]

Originally Posted by alex_t

Hi everybody and madshi.

First, BIG THANKS madshi for this software !

I would like to report here a bug (I think it is but I'm not sure). Revision is 3.24.

...

You have to do audio and video speed-up separately, because eac3to doesn't speed up video or subtitles. One way to accomplish this is to use eac3to as usual for audio speed-up.

For video, you have two methods: If you're re-encoding anyway, just add AssumeFPS(25, 1, false) to your Avisynth script. If you're not going to re-encode, mux your final MKV (original video + sped-up audio) with MKVMergeGUI, and make sure to set the video framerate to be 25.

For subtitles, you can OCR Blu-ray SUP to SRT with Suprip and then convert the framerate of the output SRT from 23.976 to 25.00fps using Subrip.

[tebasuna51]

Originally Posted by Inspector.Gadget

You have to do audio and video speed-up separately, because eac3to doesn't speed up video ...

For video,... mux your final MKV (original video + sped-up audio) with MKVMergeGUI, and make sure to set the video framerate to be 25.

This work also:
eac3to blu-ray_directory 1) 2: k:\movie.mkv -speedup 3: k:\audio.flac -speedup

The movie.mkv is already 25 fps

[Mtz]

I know 3 modes for PAL > NTSC (25>23.976) audio conversion (slowdown) used in 2 programs. Can you recommend some audio conversion for AC3 > AC3?

1. eac3to > slowdown (or another setting?)

2. behappy > Timestretch with which options of these:
- Rate, tempo, and no pitch correction
- Pitch changed preserving tempo
- Tempo changed, pitch correction

3. behappy > Resample SSRC - Slowdown 25 -> 23.976
?

enjoy,
Mtz

[sreemv]

Originally Posted by Inspector.Gadget

The way to handle a multi-title VOB set is to run PGCDemux against a complete decrypted copy of the original DVD and make sure it runs in the PGC and Title domain (two select boxes). Your output will be only the movie, and you can pass that to DGIndex or eac3to without further problems.

I did exactly what you suggested - used PGCDemux [by PGC and Titles domain] and got a clean DTS - tried it as is [23.976] and a sped up version [24fps] - still no sync. scratching head.

But, shouldnt I be setting the source to "29.970" for NTSC? Thats what it shows in mediainfo as frame reate for the video.

On an another note, any advice on how I might compare 2 audio [ac3, DTS] tracks side-by-side with timecodes?

[tebasuna51]

Originally Posted by Mtz

I know 3 modes for PAL > NTSC (25>23.976) audio conversion (slowdown) used in 2 programs. Can you recommend some audio conversion for AC3 > AC3?

A conversion implies 3 steps:

a) Decode audio:

a.1) eac3to can use Nero 7 decoder (certified but there are some issues reported about cancel DialNorm) or sonic (applies DRC always, not recommended) or free decoder libav.

a.2) BeHappy can use NicAudio or DirectShow decoder. I can't know your DirectShow decoder and how is configured.

After my test I prefer NicAudio but maybe is conditioned by parental love.

There are also other commercial certified Dolby Digital audio decoders, take care with DN and DRC.

b) Tempo conversion.

b.1) eac3to can use SSRC routines, by default, but also r8brain.

b.2) BeHappy can use SSRC routines or SoundTouch (TimeStretch).

SSRC, r8brain and TimeStretch-rate change the tempo and the pitch. If your audio is from a PAL-DVD maybe the original pitch is recovered, then for this source SSRC is recommended (maybe the SSRC routines in eac3to are more updated than included in AviSynth).

For other sources with correct pitch (PAL cameras for instance) maybe you want preserve the pitch and use TimeStrech-tempo.

There are also many Audio Editors (Audacity, Audition, SoundForge, ...) that can do the job with many options.
Maybe Prosoniq TimeFactory is a good option between the commercial soft.

c) Encode audio:
Both, eac3to and BeHappy, use Aften to encode AC3. The only difference can be the versión used. Maybe the best quality using Aften is with the parameters:
-b 640 -readtoeof 1 -exps 32 -s 1
You can use the last Aften.exe version with BeHappy and with eac3to with something like:

eac3to input stdout.wav -slowdown | Aften -b 640 -readtoeof 1 -exps 32 -s 1 - output.ac3

Of course you can use any commercial certified Dolby Digital audio encoder.

Make your choice.