Anyone ever had problems with sync drift when separately capturing analog audio and video?

Lately I've been backing up some VHS tapes using my Sony Blu-ray recorder. It records in h264 instead of MPEG-2, which is great for someone like me who has little experience with video encoding. But it only records audio in 256kbps AC3, so I've been using my M-audio 2496 sound card to record the audio to PCM at the same time. Only thing is, when I try to sync up the video from the recorder with the audio from the PC, even after I sync the start times, the PC recorded audio drifts forward out of sync at about a rate of 40 milliseconds every 10 minutes, which becomes pretty noticable after a while. Now that I think about it, Jonno had similar problems with a capture of an analog-only LD that I made for him a couple years ago using the same equipment.

Not sure why the sync drift occurs, or how I could prevent it... I also investigated an LD I recently recorded with digital audio, and there's also a slight sync drift, but it's only about 30ms for every hour of video.

Guess I'll just have to cut bits of silence here and there whenever I want to make a backup with lossless audio. I probably won't notice the difference, so I guess I'll only bother with titles I really care about.

I'm restoring episodes of Thundercats and in the last Annointment trial the last few shots have some vertical lines down the image. They wobble very slightly but are pretty static. Based on the attached pic, can anyone recommend a filter or process to automatically remove them from the picture to some extent?

Attached Files

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NetFlix are streaming a remastered X2 which may or may not be the basis for the UHD release later this year. It looks to be cleaner/more detailed, with that recent '4K' look that many of the recent Fox catalogue titles have been receiving. The colour grade is different to the existing blu-ray also, so it will be interesting to see if this translates to the UHD also.

I capped the 23.976 stream and gave it an RGB regrain to help with the compression artifacts. The final encode is blu-ray compliant and syncs perfectly to the blu-ray (no dropped or extra frames). It will fit onto a BD-25 (just!)

Thanks to Jetrell Fo I am pleased to include the original DTS Cinema Theatrical Mix! The files were converted to usable 44.1kHz wavs in foobar, all other conversions were done with eac3to. The audio was synced in Audacity and a full-bitrate Coherent Acoustics file was encoded with ffdcaenc.

No other tracks/subs are included but remember the project is 100% synced to the blu so other tracks can be easily muxed in.

Container:  MKV 1080p (21.9GB), Chapter stops as per official Blu Ray
Video: x264, Blu Ray Compliant, Average Bitrate 22Mb/s
Audio: DTS 5.1, Full Bitrate 1.5kb/s

Thanks again to Jetrell Fo for supplying the DTS iso files.

Some screenshots:

I have a Nakamichi DE-1 RF Demodulator, and a Audiophile 2946. I was able to easily capture the digital 2.0 LPCM over coax digital-out with Audacity. But whenever I try to get 5.1 it just never works right for me.

I've seen a few people on this forum say they've used this particular soundcard so maybe they can help.

My M-Audio Control panel for my soundcard will display that SPDIF meters always at max volume (don't know if this is good or bad?) and has the sync source set to locked and correctly picks up the audio Hz at 48000

I've tried recording it in multiple different softwares and none seem to work, at most I can get it 2 record 2 channels with white noise (but not 5.1 channels).

If anyone could help with this with steps, programs, etc used it would help greatly. My worst fear is that the AC-3 Demodulator might not be working correctly 

Hi everyone!! I stumbled across this amazing forum randomly while researching material for my own little projects. I'm beyond amazed, I never thought I could find such a place.

I'm italian and I have quite a digital collection that I keep expanding daily, but most of the time I have to make adjustments to the material I find (audio and video cropping, sync problems, bad video versions and so on...).

I also often find myself having to work on the italian audio sync of my material since the italian releases usually have bad video sources (I keep every movie with double audio and subtitles - ITA,ENG - even though I only watch with the original audio, but I'm not the only one enjoying the content  ).

Lately I have been fooling around with the Open Matte copies of various movies that I discovered online, and I guess that's how I actually found this place.

If I may, I could actually use a little help via PM regarding the magical places where to find all of your amazing projects, since I read in various topics the words "released!" or "in the vault", not understanding the actual meaning

Thanks! I can't wait to roam around the forums to discover your amazing work and interacting with you all!

P.S. I read that the forum admin is italian, so, I guess that's a plus?

Hello.
It has been mentioned that Eureka were erroneously given an audio track that was claimed to be original mono, but was actually a remix. Does anyone know what the best sounding source for the original mono would be?

The mono from the Japanese laserdisc is very good, but the audio itself has some differences to the HK release's audio (also taking into account the fact that the Japanese cut is an extended version).

Many thanks!

The Police Story 1 and 2 blu-ray set will be out on Monday. But I found out when I read the reviews at Blu-ray.com the color grading is wrong. It's from the same restoration team who did the A Better Tomorrow trilogy. Could anybody do a regrade of these films using the best color wise copies available?

If anyone has PDB's project,Predator Itunes Master and is willing to share a copy I would greatly appreciate it.

I've been away and have missed quite a lot in the meantime. PDB doesn't have this project anymore and am hoping

someone has a copy and can share it.

Thank you for your help guys and a HUGE thank you to PDB for making a beautiful presentation of such a kick ass film.

Hello everyone.

I've been away for awhile now. My health took a turn and I haven't had the desire or the need to be online at my computer for quite some time.

I am recovering from a serious leg infection that almost took my leg from the knee down.

I'm not 100% healed yet but I'll get there. But this is such a great place with so many talented people, I felt the need to explain myself.

-Victor

With the Criterion remaster, this is no longer needed



The Great Escape HDTV Version (v1.1)

Project Info:

I dug this up off an old hard drive and like a lot of my projects it just requires the audio sync to be finished...

When the US BD came out, even though it was a new scan, many people did not like the new dark, cool teal and blue color timing. It was very different compared to the older CE DVD:

http://www.dvdbeaver.com/film/dvdcompare...escape.htm
https://caps-a-holic.com/c.php?d1=2391&d2=2390&c=490

whereas the older CE dvd was warm with oranges and yellows. A pretty significant difference. Luckily, the older scan had been broadcast several times in HD over the years (like HDNET in the US). I took 3 separate recording and combine them together to create a version with the most frames possible, so GE can now be enjoyed in bright, warmer colors.

I also took both the (now rare) PCM mono and analog commentary from the Criterion LD and synced them to this project, bring back the original sound of the Great Escape.

Note:  This is not synced to the US BD. I didn't do a full count but even with 3 copies, the HDTV was some 70-ish frames off the BD.

Video:
3 HDTV broadcasts combined to create the best overall version and then run through light de-haloing and de-blocking with no color correction

Audio:
1. PCM 2.0 Mono (from the Criterion WS LD)
2. PCM 2.0 Stereo (from the HDTV broadcast)
2. PCM 2.0 Mono Commentary (from the Criterion WS LD's analog tracks)

Pics:

MKV Pics


BD/HDTV