delaycut - ac3/eac3/dts/mpa/wav delay+cut tool: v1.4.3.7

Yeah I'll see which one appears less annoying. Also if you have any other feedback please feel free to keep the ideas coming. I'm more than happy to make tweaks to make the tool better.

[phate89]

amtm did you ever think to improve the tool allowing insert silence or cut audio inside the file?
you add the points in the audio and the operations (add silence, remove audio, loop the audio) and he make all the changes in one pass...complete basic editing without recompression...
there's nothing like this... eac3to allows to insert silence or remove audio in track but only one for pass (so with 5 editing i have to recreate 5 times the full file), your tool allows cuts and delay but no insert or cut in the middle, besplit only split the file in parts...
I already create my own program to do that based on this tool but everytime i have to split & then join increasing the time and i can't compensate the not fixed delay...
naturally it's not so easy to do but it could be a very useful tool... perfect for me... if you have time think about it...i try to look into the code but it's too much for my skills

[TDiTP_]

One thought about delaycut vs eac3to.

Originally Posted by madshi

eac3to can not "create" new silent DTS frames which are needed for delay. Instead eac3to simply repeats the very first frame of the audio track as often as necessary to achieve the wanted delay. Normally a DVD audio track begins silent, so this usually works. If your DVD audio track begins non-silent, then eac3to's way of delaying isn't silent, but results in ugly noise, sadly. If there was a free DTS encoder available, I could solve this, but there isn't. For AC3 I'm using Aften to do the audio delay properly and guaranteed-noise-free.

delaycut can do this better, but since it doesn't have a DTS encoder, either, it simply uses a default silent DTS frame - which doesn't have the DTS-ES flag set, of course.

I can add. Delaycut can add "standart" DTS frames only (they are use on DVD; 1006 against 1024 "bytes per frame" for 768) and if we add such frame to DTS from Blu-ray, then eac3to with ArcSoft/Sonic/Nero will not be able to decode it (but libav can). => we can't use it to work with DTS from Blu-ray.

For example. Look at this stream from BD. Try to decode it (by ArcSoft/Sonic/Nero) and then using delaycut add delay and retry decode. Then cut delay and retry again

Can you add Blu-ray's dts frames to "default silent DTS frame" of delaycut?

[Midzuki]

^ @ TDiTP_

«Normal» "Blu-Ray DTS" can be anywhere between 1.0@192kbps and 5.1@1509kbps. So, delaycut would have to be shipped together with a "small truckload" of "silent DTS sample files"

[TDiTP_]

Originally Posted by Midzuki

«Normal» "Blu-Ray DTS" can be anywhere between 1.0@192kbps and 5.1@1509kbps

Yes (and 5.1@1510kbps can be too).

Addition to my previous post. If we talking about "Targeted BitRate"=1536:
1). Most of "Blu-ray DTS" (all that i saw, but can be exceptions) have 2012 bytes per frame.
2). All "core DTS" have 2012 bytes per frame. This is most important. At least for this we must have support for such frames in delaycut, which can add only 2013.
3). In DTS-HD M.A.S. when we select "Destination Format = DVD (.cpt)" we always get 2013 bytes per frame. If "Destination Format = Blu-ray disc (.dtshd)" we always get 2012 bytes per frame (in dts or "core dts").

[Stereodude]

I found another couple of bugs.

1) Changes to the video FPS field don't cause the program to recalculate unless you change another field or change an checkbox.
2) The starting offset delay doesn't re-autopopulate / recalculate if re-opening the same file or changing the FPS.
3) Changing from frames to ms causes the starting offset delay to decrease each time you switch
4) The starting offset delay isn't subtracted from the cut file End setting so the output audio is too long

[sl1pkn07]

i have problems build in my archlinux

sl1pkn07@sL1pKn07 delaycut $ qmake -makefile delaycut.pro 
sl1pkn07@sL1pKn07 delaycut $ make
g++ -m64 -Wl,-O1,--sort-common,--as-needed,-z,relro,--hash-style=gnu -Wl,-O1 -o delaycut     -L/usr/lib -lQtGui -lQtCore -lpthread 
/usr/lib/gcc/x86_64-unknown-linux-gnu/4.6.2/../../../../lib/crt1.o: In function `_start':
(.text+0x20): undefined reference to `main'
collect2: ld devolvió el estado de salida 1
make: *** [delaycut] Error 1
sl1pkn07@sL1pKn07 delaycut $

Sorry, I've been away for a bit. Will address the bugs this weekend. sl1pkn07 your build problems are due to their being two different configs in the pro file. You need to add a CONFIG+=Linux on your qmake line. I'll update the readme with information about building from source so that's more obvious.

[sl1pkn07]

oh! thanks

[Stereodude]

Originally Posted by amtm

Sorry, I've been away for a bit.

We were about to send out search parties.

[phate89]

Originally Posted by amtm

Sorry, I've been away for a bit. Will address the bugs this weekend. sl1pkn07 your build problems are due to their being two different configs in the pro file. You need to add a CONFIG+=Linux on your qmake line. I'll update the readme with information about building from source so that's more obvious.

don't worry take your time...
you think it's possible to make a program like the one i described before? i'm trying to look at the C++ code to understand how it works and try to do it myself but is far too adanced for me... the first problem is that i have no clue how are composed the files...
You think it's theorically possible?

Yeah it can be done. I'm just trying to work out the best way to implement it.

[phate89]

Originally Posted by amtm

Yeah it can be done. I'm just trying to work out the best way to implement it.

UUh great!
Unother idea that could be useful in that program is a loop flag.... if there's the loop flag in that edit instead of inserting some silence it repeat the previous frames...

[tebasuna51]

Another suggestion to DelayCut improvment.

If we have a ac3 file with mixed content (for instance a TV capture with 5.1 frames from a movie and 2.0 frames from commercials), DelayCut show a message like:
Time 00:00:20.032; Frame#= 627. Some basic parameters changed between Frame #1 and this frame

But the output file remains invalid (a valid ac3 stream must contain only the same frametypes).
Also the 'Num of frames' and 'Duration' are incorrect because the 'FrameSize' change.

I suggest a flag with 3 options:

1) Ignore FrameType changes (like now)
2) Extract only frames like first FrameType.
3) Extract only 5.1 frames.

[phate89]

Originally Posted by tebasuna51

Another suggestion to DelayCut improvment.

If we have a ac3 file with mixed content (for instance a TV capture with 5.1 frames from a movie and 2.0 frames from commercials), DelayCut show a message like:
Time 00:00:20.032; Frame#= 627. Some basic parameters changed between Frame #1 and this frame

But the output file remains invalid (a valid ac3 stream must contain only the same frametypes).
Also the 'Num of frames' and 'Duration' are incorrect because the 'FrameSize' change.

I suggest a flag with 3 options:

1) Ignore FrameType changes (like now)
2) Extract only frames like first FrameType.
3) Extract only 5.1 frames.

very good idea...could be a easy way to remove ads too!
usually ads are 2.0 so will be removed automatically

Sorry guys I've been really bad about getting back to this. I've have written down all the suggestions on my TODO list. I really hope to get a new version out this weekend that at least addresses the last couple of bug reports before I get into implementing those new features. Just want to let you know that I am still monitoring this. The time leading up to this holiday has just been rather crazy.

[pandv2]

I searched long time for a tool to add silence and cut as described by phate89. Now I am using besplit to break the ac3 in parts, ac3to to add delay to each part o cut the beginning and ac3to to rejoin the fragments. It's automated (so, no extra work), but it's ugly.

And let me add another option to tebasuna51 flag to deal with mixed ac3 frames:

4) Force the track to be 5.1 or 2.0 (dropping channels or adding silence channels). It this is not possible without reencode, forget it.

And, please, rememeber to add the new options to command line.

Thanks for your work, and don't worry about time.

[tebasuna51]

Originally Posted by pandv2

...
4) Force the track to be 5.1 or 2.0 (dropping channels or adding silence channels). It this is not possible without reencode, forget it.

Yes, is not possible without reencode.

[phate89]

Originally Posted by tebasuna51

Yes, is not possible without reencode.

it's not possible to do it reencoding only the necessary frames? i don't know very well ac3 structure. in theory should be possible?

[tebasuna51]

Originally Posted by phate89

it's not possible to do it reencoding only the necessary frames? i don't know very well ac3 structure. in theory should be possible?

You need split, decode, edit, recode and join.
To much job for a useless, for me, output.