- 62
- 38 966
Dave Rice
Приєднався 22 вер 2007
Dave Rice at V International Seminar on Digital Preservation - V SINPRED
I presented on a panel at SINPRED and this video is the pre-recorded part of my presentation. This presentation discusses the relevance of the OAIS model and the concept of microservice architecture to the design of digital preservation workflows. The presentation is based upon a paper my Annie Schweikert and myself, available at journal.iasa-web.org/pubs/article/view/70/91.
This was a really wonderful, comprehensive, and accessible conference and I encourage everyone to learn more at eventoscariniana.ibict.br. More about the program is available at eventoscariniana.ibict.br/index.php/sinpred5/navigationMenu/view/programa.
I subtitled this video in English. Please contact me if you would like to provide any corrections to the automatic translations.
This was a really wonderful, comprehensive, and accessible conference and I encourage everyone to learn more at eventoscariniana.ibict.br. More about the program is available at eventoscariniana.ibict.br/index.php/sinpred5/navigationMenu/view/programa.
I subtitled this video in English. Please contact me if you would like to provide any corrections to the automatic translations.
Переглядів: 154
Відео
dvloupe demo
Переглядів 564 роки тому
This is an output of dvloupe, part of the dvrescue project, that shows a head clog where all even numbers dif sequences contain video error concealment.
Managing (Digital Preservation | Despair & Paranoia)
Переглядів 1984 роки тому
In April 2019, I was invited to present about microservices at Preserving Moving Image & Sound: a DPC Briefing Day (www.dpconline.org/events/past-events/preserving-sound-and-vision). Since I was going to be on vacation at the time, I made a remote presentation. Thanks to Joanna White for her support and editing help. This video is based upon a related paper published by IASA at journal.iasa-web...
Stuff Karl was interested in.
Переглядів 1207 років тому
Related to ua-cam.com/video/Xwz4saL 88/v-deo.html
The Simpsons Intro on Waveform Monitor
Переглядів 1,1 тис.7 років тому
Playing the Simpsons Intro to a waveform monitor, via youtube-dl to ffmpeg through scale, negate, geq, and scale again, then to bmdplay through a Blackmagic Ultrastudio Express via component out to a Tektronix 1750 waveform monitor. # howto ``` youtube-dl ua-cam.com/video/K7MRI3sSSY8/v-deo.html ffmpeg -re -i The\ Simpsons\ Intro\ 1991-K7MRI3sSSY8.mp4 -vf "scale=512:512,negate,geq=lum=if(lt(lum(...
demo of readvitc readeia608 filters with drawtext and scaling
Переглядів 5347 років тому
ffmpeg -i a_file_that_actually_contains_vitc_and_eia608_data_like_an_imx_capture_from_videotape.mkv -vf "readvitc=scan_max=30,readeia608=scan_max=30,crop=iw:30:0:0,scale=720:480:flags=neighbor,setdar=4/3,drawtext=fontfile=/Library/Fonts/Courier\ New.ttf:fontcolor=white:fontsize=36:box=1:boxcolor=black@0.5:x=(w-tw)/2:y=h*3/4-ascent:text=VITC %{metadata\\\:lavfi.readvitc.tc_str\\\: },drawtext=fon...
OAIS Rationale vs noise
Переглядів 787 років тому
Section 1.3 of OAIS, the Rationale section, versus random noise. public.ccsds.org/pubs/650x0m2.pdf ffmpeg -f lavfi -i color=c=black:s=720x486 -vf drawtext="fontsize=32:fontfile=/Library/Fonts/Courier New.ttf:textfile=oais_rationale.txt:y=h-20*t:fontcolor=white,geq=if(gt(lum(X\,Y)\,16)\,1-(255*(N/100)*random(6))\,255*(N/1000)*random(1)):cb=128:cr=128" -t 45 -c:v ffv1 noisy_rationale.mkv
ffmpeg -h full
Переглядів 3257 років тому
# replace the % with a greater-than symbol, which is apparently not allowed to be used in youtube descriptions ffmpeg -h full % ffmpeg.txt ffmpeg -i ffmpeg.txt -vf scale=640x480,perspective=200:0:420:0:0:H:W:H:sense=1:interpolation=cubic -c:v libx264 -pix_fmt yuv420p ffmpeg.mp4
Lumière Brothers - The Serpentine Dance (c.1899) presented YUV 4:4:4 values
Переглядів 3478 років тому
using @richardpl's draft datascope to transform video into hexadecimal values of each pixel
chromascope demo
Переглядів 2568 років тому
test video of a draft of a chromascope filter by @richardpl ``` ffmpeg -f lavfi -i "movie=/Users/davidrice/files/clean.clean.nathan.mkv,split=6[a][b][c][d][e][f];[a]chromascope=system=0,drawtext=fontfile=CourierNew.ttf:fontcolor=white:fontsize=108:text=ntsc[a1];[b]chromascope=system=1,drawtext=fontfile=CourierNew.ttf:fontcolor=white:fontsize=108:text=ebu[b1];[c]chromascope=system=2,drawtext=fon...
testing audio in vrecord
Переглядів 4408 років тому
Here's a draft of an audio panel in the vrecord use of ffplay to present various metrics of audiovisual data to aid in digitization. Created with: ``` ffmpeg -i bees2_ffv1.mkv -filter_complex "[0:v:0]split=5[a][b][c][d][e];[b]field=top[b1];[c]field=bottom[c1];[b1]format=yuv422p,waveform=intensity=0.1:mode=column:mirror=1:c=1:f=lowpass:e=instant,split=3[w1][w2][w3];[w1]crop=in_w:16:0:0,lutyuv=v=...
Laptop Pixels under Microscope
Переглядів 9218 років тому
This is a screen recording of two windows, one playing a series of gradients transitioning through the six major computer color points (red, green, blue, cyan, magenta, and yellow). I then have a digital microscope sending an image back to an underlying window, while I apply the microscope to the color gradient transitions. Apologies for not cleaning my laptop screen beforehand.
interstitial error viz
Переглядів 579 років тому
interstitial error visualization astats=metadata=1:reset=1,adrawgraph=m1=lavfi.astats.1.Max_difference:slide=scroll:mode=line:max=2
flat draft2
Переглядів 609 років тому
format=yuv444p,geq=lum=lum(X\,Y):cb=lum(X\,Y) (abs(cb(X\,Y)-128) abs(cr(X\,Y)-128))*random(1)*0.43:cr=lum(X\,Y)-(abs(cb(X\,Y)-128) abs(cr(X\,Y)-128))*random(1)*0.43,histogram=mode=waveform:waveform_mode=column:waveform_mirror=1:display_mode=overlay,scale=720:480,setdar=4/3
qctools field-split waveform second draft
Переглядів 45110 років тому
qctools field-split waveform second draft
Amazon Prime Air video, 8th bit position of the luma channel only
Переглядів 6510 років тому
Amazon Prime Air video, 8th bit position of the luma channel only
shut up
Thank you so much Dave for this excellent presentation!
Amazing!
Dang this should have been reccomended to everyone.
Muito bom, Obrigado!!
Obrigado por compartilhar essa maravilhosa apresentação, professor Dave! sua participação no evento foi excelente! Parabéns!
😊 Thank you João!
Extraordinary presentation!
Was great!! Thanks!!!
Dear Dave, your talk was great! Congratulations!
Thank you!
great
Hi, Is it possible to read the time code of single frame ?
Fantastic short movie love Larry
Thanks Dave for recording and posting this. I always like your common sense explanatory style. Cheers, josef
Love Buster Keaton
Cool, thanks for this !
Very clever, Dave. Can I see the companion video to this (what the actual video driving the waveform monitor looks like)?
Hi Karl, I never wrote the 'actual file' til you asking, but I uploaded the result to here. It demonstrates that I have an issue related to the chroma planes and chroma subsampling. I should drop the chroma planes if I try this again.
and the link is here ua-cam.com/video/Rt_rMCtr_co/v-deo.html
Dave Rice, I didn't expect the video to be so recognizable,! I clearly need to play with such things to understand more.
すごいですね！ アプリだして欲しい！！
Im trying to do the same, is there any code example for ffmpeg I can try out somewhere? Still havn't figured it out yet.
Hi Marco, you can use the scale filter and datascope together. For instance: ffplay serpentine.mkv -vf scale=80x20,datascope=mode=color The scale filter is reducing the video to a very small size in order to fit it into the datascope.
thank you! trying right now :)
It worked on ffplay! it was awesome! now im trying with " ffmpeg -i test.mp4 -vf scale=80x20,datascope=mode=color[v]" \-map "[v]" datascope.mp4" = getting "Output with label 'v' does not exist in any defined filter graph, or was already used elsewhere." - I'm so bad at the syntax :( :(
Marco Misheff try: ffmpeg -i test.mp4 -vf scale=80x20,datascope=mode=color datascope.mp4
i just wasted 60 seconds.
Terrific, Can you showme the code with ffplay. I want to do some similar but I can't put together an audio filter with video filter with ffmpeg
Yes
Good clip. And I like the music.
Nice clip but oh dear, get rid of the music!!
Do you know WHY Stan Laurel left Vitagraph and Semon - just BEFORE Oliver Hardy joined them? For the FULL and complete. story of that and other such fascinating background events, personal and professional - read the two NEW books "ARTHUR AND NORVELLE: THE FORGOTTEN AND REAL LEGEND OF LAUREL AND HARDY" (Amazon), written at the request of the MILLIONS OF L&H internet fans, when the "Decoding Laurel and Hardy Project" counted them! Wesbite for full details: arthuranddnorvelle@yolasite.com
Wow, this is amazing. Thanks!
This is the prettiest video on youtube! :)
Don't need title cards here!