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30th November 2017, 22:21 | #14522 | Link |
Matroska find' ich toll
Join Date: Apr 2008
Posts: 1,379
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Hi madshi
eac3to don't find the correct mpls for the Bluray Spider Man Homecoming mpls 00420 with 16 chapters is missing. Code:
eac3to v3.33 command line: "D:\eac3to.exe" "K:\" -log="E:\Spider Man - Homecoming\title.txt" ------------------------------------------------------------------------------ 1) 00421.mpls, 00001.m2ts, 2:13:28 - Chapters, 83 chapters - h264/AVC, 1080p24 /1.001 (16:9) - DTS Master Audio, English, multi-channel, 48kHz - DTS Master Audio, German, multi-channel, 48kHz - AC3, Turkish, multi-channel, 48kHz 2) 00422.mpls, 0:32:00 [334+342+343+344+345+346+347+348+349+350+351+352+353+354+355+356+357+335+338].m2ts - Chapters, 17 chapters - h264/AVC, 1080p24 /1.001 (16:9) - AC3, English, stereo, 48kHz 3) 00353.mpls, 0:16:17 [342+343+344+345+346+347+348+349+350+351+352].m2ts - Chapters, 10 chapters - h264/AVC, 1080p24 /1.001 (16:9) - AC3, English, stereo, 48kHz |
1st December 2017, 00:54 | #14523 | Link | |||
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Join Date: Jun 2007
Posts: 44
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I have a problem with a movie, the movie plays well w/o issues...However when I tried to convert the audio track I've had some issues...
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Can you guys investiate this? The extracted audio track is here https://mega.nz/#!9uYFmQJb!Mk3i3QY0G...EQGnNjA8GFv8Sw |
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1st December 2017, 12:16 | #14526 | Link | |
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Quote:
thnx *edit* I tried to use your utility LaaAudBi4, Avira reported a threat and blocked it... Last edited by mtamimi; 1st December 2017 at 12:25. |
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1st December 2017, 13:05 | #14527 | Link |
German doom9/Gleitz SuMo
Join Date: Oct 2001
Location: Germany, rural Altmark
Posts: 6,781
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Heuristic warnings are usually false alarms, report them to your AV company.
Regarding automatic splitting of AC3 related to a changing channel layout, I am not sure what to do these days; I remember that ProjectX was able to detect channel layout changes, but only in SD TS with MPEG-2 video, it can't handle MKV. HeadAC3he was able to extract time ranges from AC3 files frame-wise, but you would have to know the exact timecodes. |
1st December 2017, 14:10 | #14528 | Link | |
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1st December 2017, 14:26 | #14529 | Link |
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Join Date: Dec 2002
Posts: 5,565
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Too lazy to test now but maybe you can use delay in this simple case. Something like:
eac3to input.ac3 temp.ac3 -8000ms eac3to temp.ac3 output.ac3 +8000ms Or with edit function. I'm sure tebasuna51 will post a proper solution(*) if this doesn't work. (If there is sound then maybe recode the first 8 seconds to 5.1) (* if you want to regard this as a problem to begin with) |
1st December 2017, 14:36 | #14530 | Link | |
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Quote:
EDIT: The sneaker_ger solution work fine because the first 8 sec are silence.
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BeHappy, AviSynth audio transcoder. Last edited by tebasuna51; 1st December 2017 at 14:45. |
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1st December 2017, 19:28 | #14531 | Link | |
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Quote:
*edit* Anyone aware of a utility that helps me to trim the 1st 8000ms of the h264 video. If eac3to is capable of doing that, would someone show me an example?! Last edited by mtamimi; 1st December 2017 at 21:55. |
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1st December 2017, 22:23 | #14535 | Link |
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I did add +8000ms to the trimmed 5.1 auido track, and remuxed with the original untouched video and everything is in sync w/o issues. This is also good since I don't need to modify the chapters also...
I am only curious if I decided to trim the video by -8000ms instead of adding +8000ms of silence to the audio track...how can I do that easily? |
1st December 2017, 22:30 | #14536 | Link |
German doom9/Gleitz SuMo
Join Date: Oct 2001
Location: Germany, rural Altmark
Posts: 6,781
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But Dolby Digital AC-3 has 32 ms frames (at 48 kHz, with 1536 samples). Fortunately, 8000 ms are an integer multiple of its frame duration. But what if not? Will the duration be rounded up or down to the next audio frame border? It may be (generally) more reliable to split audio streams at the frame boundary between different channel layouts, no matter which duration they have written in seconds and milliseconds.
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1st December 2017, 22:46 | #14537 | Link |
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Depends on the software. With mkvtoolnix you can just do "--split parts:00:08-" and it will cut all tracks accordingly and also set delays in container to make precision <=1 ms if cuts aren't exactly on frame boundaries (which - like you said - seldomly align). It's not really a problem anyone should lose sleep about.
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2nd December 2017, 12:56 | #14538 | Link |
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Cut all tracks of a container without recode (VideoReDo or similar can recode only boundaries) at a exact point need:
- The time point is a exact multiple of audio framelength. Here, with AC3 48 Khz, 8000 ms are 250 x 32 ms, then cut the first 250 frames. - The time point is a exact multiple of video framelength. If video have 25 fps you can cut the first 8000 / 25 = 320 frames, but you need than the 321ª frame was a Keyframe. With other fps or without a Keyframe at exact point you can't cut exactly without recode.
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BeHappy, AviSynth audio transcoder. |
2nd December 2017, 13:10 | #14539 | Link |
German doom9/Gleitz SuMo
Join Date: Oct 2001
Location: Germany, rural Altmark
Posts: 6,781
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But the problem of mtamimi here is not cutting at an arbitraty timecode. It is cutting at the audio frame where the channel layout changes. And it is knowing the position of that audio frame, not in milliseconds, but in audio frame number. And you already suggested SplitAc3 for this job. All is fine.
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2nd December 2017, 13:45 | #14540 | Link | |
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Quote:
"you can't cut exactly without recode." |
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