datvideo | Storing Video on Digital Audio Tape (DAT)
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- Опубліковано 25 сер 2024
- In this video I demonstrate a proof of concept where h265 encoded video is stored on a Digital Audio Tape (DAT). It is an amusing fusion of late 80s tech with very modern high compression video codecs and the result is impressive.
Links:
Blog: www.theresistor...
Github: github.com/aar...
Alt Channel: / @theresistornetworkalt
Twitter: / resistornetwork
Credits:
Music: Dj Quads - Blushes
Link: / blushes
Thank-you for the great music!
Music: LAKEY INSPIRED - Watching the Clouds
Link: / watching-the-clouds
Thank-you for the great music!
#TheResistorNetwork #VintageTech #HiFi
1080p h.265 via SPDIF. Now I've seen it all. So great!
That is so cool. With Github source! You're a gentleman and a scholar.
Fascinating ! Just bought a second hand DAT machine and years ago I got that exact same sound card as you have so will have to try this
Neat. Reminds me of my Fisherprice PXL-2000 video camera that records black and white video with mono audio onto type 2 chrome audio cassettes. It also reminds me of the rare Alesis Adat recorders which do the opposite by storing 8 track HD audio onto S-VHS video cassetes. It is so wonderful to use rare relic machines.
This is crazy information. Thank you for enlightening all of us!
this is a really cool project. I think old SGI machines also used DAT tapes and drives as a cheap backup solution.
Thanks! Yup, you are correct. In fact, you can use the "computer" tapes in audio decks for longer runtime. The downside is that the DAT decks don't always handle the longer tape well and tend to jam on them.
I have two DAT drives used for storing data. The format is called DDS. I also managed to store and stream video from the drive in real time, although it's not as impresive as storing video as audio data :)
1tb NVME ssd sticks are about $100. Can't really complain about that.
@@firesurfer stfu, it isn't as magical as a tape or a disc.
@@vladtomoiaga4721 I want...
Jealousy.
Wow, this reminds me of W-VHS and MUSE laserdisc
Very cool.
Now i can make my DAT movie collection ha ha, thanks! Oh, after 4 years, now it's time to do it with Philips DCC!
thanx for sharing this, this is really cool
Wow, now imagine putting such video over software PCM audio to video adaptor that were used in the 80s as the master tape digital storage to smuggle videos over UA-cam! I have the demos. This format was 44100Hz 14 or 16bit but I think it is still suitable to hold a video.
You can use DDS cartridges. DDS-2, DDS-4 should fit
DDS-1 60m and 90m are the best options. Anything above that is extremely thin, and could get jammed!
great project 👍
amazing. liked and subscribed
Once my DAT player comes back from repair I am so doing this lol
Bookmarking this video for later. I'm trying to get video onto regular audio cassette, but that's cool that you got the video stored onto DAT.
Not possible
@@BavarianM It is possible. High quality? No. But it is possible. The fisher price PXL-2000 is a great example.
Very interesting project.
To use DAT for soething that could be done with HDV and D-VHS.
I wonder what this video looks like with the lovely DAT tape errors that may occur overtime or badly aligned heads
This is pretty much exactly what I've wanted to do with an ordinary 80s VHS deck like they did with PCM audio and data adapters.
Decent 1080p60 is expecting a little much even with h265 but you can do some imressive video at that bitrate.
Now - do video with an analogue cassette deck ❤👀👀
This is a very cool hack! If you can encode all the way to 16 bit 44.1 you can store HD videos on Audio CDs! Sadly, the H.265 compression did not exist back in the 1990s otherwise we would be having very good quality Video CDs which could store up to 74 min of high-quality compressed video which would surpass the low quality MPEG1 VCD standard back in the day! Still, I don't like media compression. I would like to see a UA-cam video being played with digital noise, and this being able to be converted into lossless 16 bit 48 khz or 16 bit 44.1 khz audio which would turn UA-cam into a storage haven for high quality audio recording but will alarm UA-cam and the record labels unless the data is encrypted.
Sony DTC-690.
I have the same deck, and I sorta both like it and hate it at the same time. The thing works and sounds great, it's stylish, but mechanism is a bit crap and yanks the tape, untreading it during eject.
It seems to be by design; there's a solenoid, that engages reel brakes when disengaged, and brakes threading mechanism when engaged. So untreading a tape normally by gradually spooling the tape back in is simply not possible since both brakes must be disengaged for that. So it first pulls in the guides, leaving a tape loop loose, which it then proceeds to schlorp violently back into cassette.
Hopefully Tascam DA-P1 will behave better when I'll get ahold of it.
Ha, mine behaves the same way. The mechanism is just a little clunky in general, but it is a nice unit overall. I like the VU meters during playback/record. Audio quality is as good as my Marantz NR1508's DAC can produce as I have TOSLINK running throughout my system.
That TASCAM unit is beautiful! Enjoy that.
So you can turn a DAT recorder into a HD VCR?
In a way, yup!
I'm interested in trying something similar but storing digital audio on analog tape. So similarly highly compressed digital audio, converted into a audio stream pumped into normal or high bias tape.
avisa, si lo realizas
It's worth a shot. The only problem to tackle though is bandwidth. Most good analog tape decks can only go up to 16khz until it rolls off.
great idea!!
What if they made camcorders that recorded on DAT tape instead of MiniDV?
You've done the opposite of what Phillips did to record PCM audio for CDs onto U-Matic video tape. Using PAL format it worked out to exactly 44.1Khz. NTSC would've resulted in a similar number but not exactly 44,100 samples per second.
How about putting DVD compliant MPEG2 with AC3 audio onto DAT?
Yup, that would definitely work. The datvideo software tool could encode any arbitrary data onto the tape. My first test was storing a JPEG.
DAT at the highest settings uses 1536kbps PCM audio. That's the bitrate budget you got if you want realtime playback from the tape. HEVC/H265 produces a very good quality picture at this bitrate, that's why it was choosen in this test. MPEG2 is now at least three generations behind and HEVC/H265 provides around ~70% better compression than MPEG2. Of course if realtime playback is not necessary, you can do whatever you want, but then for a full feature film you might need more than one tape.
@ : Next step would be a 2x speed option, more bandwith.
interesting concept do you think this concept could be applied to vintage 12bit samplers ? (Akai 950) The vintage sampler community would love you forever !!
I don't know why but I want to use dats and minidiscs instead of.solid state for sound capture. I certainly have a boatload of media for both
Oh, I forgot to say that what you did is toallyawesome
@@RagedContinuum thanks!
Question: why might this be happening?
I did a simple thing in which I just added a 44.1 kHz 16 bit WAV header to the top of some N64 rom in HxD, changed the extension to WAV, played it with Foobar2000 on WASAPI setting over TOSLINK with the cable plugged back into my PC while it was recording it with Audacity at 44.1 16 PCM (result file was 1 minute, 30 seconds), but when I exported the recording at 44.1khz 16bit, a very large portion of the bytes were shifted up or down usually by a value of 1. With more experimentation with HxD, I found out that the same thing happens with normal audio rips too, though inversion tests with Audacity showed that the original file and the recorded one sound exactly the same.
I'm curious as to why there are byte shifts if SPDIF transfers are supposed to be bit-perfect.
I should also let you know that my Foobar2000 and Audacity both have dithering off, and the USB sound card I use is the U24 XL.
Thanks.
Yeah I ran into a similar issue on my first attempt at this project. It turns out that somewhere on the software audio path, a mixer was applying an unknown transformation that was corrupting the stream.
I fixed this by using the simplest possible and shortest audio path under Linux. I disabled pulseaudio and used aplay to send the audio to the sound device. Once I could confirm that a bit perfect copy was happening, I started involving the tape.
Hope it helps.
Is somebody did on audio cassette as analog audio, how it is appears with the noise of the tape?! It is very interesting and curious for released on cassette tape, it is gonna be nice content for peoples that they have a cassette tapes and they have found opportunity to trow it into garbage.
I don't know but it is decidable if using chrome tapes on high bias and playback as also may dolby NR if it's used will cut the signal binary and will be mistake and will it open errors by reading process.
is it possible to use vhs or beta tape(whole tape) as digital unpressed hifi audio format?
Wow it’s amazing that it works in real-time! Would it be possible to store real-time data on a regular audio cassette? Not necessarily at the same rate as with DAT, but would it even work? You could take the analog output from your DAT deck.
Analog audio cassette barely has any bandwidth compared to dat
I have 2 or 3 DAT’s that my videographer gave me that were used to make a 30 minute wedding DVD. I have never seen the full footage that was recorded 16-years ago. I would live to convert somehow and watch as many attendees are no longer with us. Can you suggest how I might be able to do this? Many thanks in advance.
Hi Carl, those are likely DDS tape for which you can find readers. I'm not an expert on that format. Best of luck finding something.
Ist IT posible to usw normal Audio Tapes with a dat Audio Recorder?
Or is it possible to use a Normal Tape Deck?
They are two separate formats so no.
la raja tu video! creo que también se podría en un cassette de audio regular, quizás solo algunos segundos de vídeo, esperar cargar toda la data unos 90min. Saludos
I'm assuming that the video takes up pretty much the entire bandwidth, but is there a way to record video and store two channels of (compressed) audio?
The data stream contains compressed audio and video. It is pretty amazing that this old format can handle it.
@@TheResistorNetwork Makes me think of what we can theoretically pump onto digital8 or miniDV now.
. That's cool but looks like a lit of work. Some company (samsung?) had a 4mm camcorder. Not sure what became of it.
Someone could use a VHS PCM encoder and make an HD VHS tape
It is now possible. "PCM Coder" software encapsules the audio containing the transport stream with the video. There's encoder and player software for VHS PCM format.
May I know what is the software called?
It is available on my GitHub. It is called datvideo.
wtf that's crazy bro i don't get how does digital audio get stored on magnetic tape or any digital data for tha matter 🤯🤯🤯
It is stored as an analog singal after adding error correction and modulating it. But this happens on the very end of the process before the signal reaches the tape drum. Think of it as an older telephone modem which done this in the voice audio range. But of course this is more advanced, capable of storing around 2Mbps of data.