请输入您要查询的百科知识：

　

词条 FFV1
释义

  1. Video archiving

      List of institutions known to use FFV1    Development and improvements    Suitable as preservation codec  

  2. Applications supporting FFV1

  3. Compression details

      Prediction process   Entropy coding process 

  4. Status

      Codec  

  5. Documentation

  6. See also

  7. References

{{Infobox file format
| name = FFV1
| icon =
| logo =
| extension =
| mime =
| type code =
| uniform type =
| magic =
| owner = Michael Niedermayer (FFmpeg)
| released = {{Start date and age|2003|06|09|df=yes}}
| latest release version = Version 3 (FFV1.3)
| latest release date = {{Start date and age|2013|08|03|df=yes}}
| genre = Video compression format
| container for =
| contained by = AVI, MKV, MOV, NUT, etc.
| extended from =
| extended to =
| standard =
| free =
| url = [https://github.com/FFmpeg/FFV1/blob/master/ffv1.md FFV1 Video Codec Specification (in progress)]
}}

FFV1, which stands for "FF video codec 1", is a lossless intra-frame video codec. It can use either variable length coding or arithmetic coding for entropy coding. The encoder and decoder are part of the free, open-source library libavcodec in the project FFmpeg since June 2003.[1] FFV1 is also included in ffdshow and LAV Filters,[2] which makes the video codec available to Microsoft Windows applications that support system-wide codecs over Video for Windows (VfW) or DirectShow.

FFV1 is particularly popular for its performance regarding speed and size, compared to other lossless preservation codecs, such as M-JPEG2000.[3][4][5]

The European Broadcasting Union (EBU) lists FFV1 under the codec-family index "31" in their combined list of video codec references.[6]

Video archiving

For long-term preservation of digital video sustainable container formats as well as audio/video codecs are necessary.

There is no consensus to date among the archival community as to which file format or codecs should be used for preservation purposes for digital video.[3] The previously proclaimed encodings were Motion JPEG 2000 (lossless)[8] and uncompressed video.[9]

FFV1 has turned out to be a viable addition to that choice and was added as a suitable option for preservation encoding in 2014.[3][11]

With compression ratios comparable to JPEG 2000 lossless and its lower computing requirements, it is already being used by professional archives as their long-term storage codec.

Especially archives where the collections do not feature extensive broadcast materials but rather consist of, oral history-, ethnographic-recordings and the likes, "favored the lossless FFV1 encoding" in communications with the "Federal Agencies Digitization Guidelines Initiative" (FADGI) team.[4][13]

As of 2015, standardization of FFV1 through the Internet Engineering Task Force (IETF) is work in progress as part of the European PREFORMA Project,[14] as well as implementation of a conformance checker for FFV1/PCM in a Matroska (MKV) container.[15] Details of FFV1's standardization plan[16] have been prepared by MediaArea (authors of MediaInfo) as part of their conformance checking tool "Media CONCH".[17]

It is also listed as a format option for long-term preservation of moving images on sites of the U.S. Library of Congress',[11][19]

State Records NSW[3] and others. The Society of American Archivists has published a paper in August 2014, suggesting only FFV1 as preservation codec for video.[21]

The Digital Preservation project at the U.S. Library of Congress identified AVI and Matroska as common container formats for FFV1.[5][6]

List of institutions known to use FFV1

Austria
  • Austrian Museum of Modern Art (MuMoK): For their collection of art videos.
  • Danube University Krems (Lower Austria/Niederösterreich)
  • Filmarchiv Austria (Austrian Film Archive): For their telecined DigiBeta copies of some films.
  • {{Interlanguage link multi|Landesmuseum Niederösterreich|de}} (State Museum of Lower Austria)[7]
  • Österreichische Mediathek (Austria's national audio/video archive)[8][26]
Australia
  • Museum Victoria
Canada
  • City of Vancouver Archives[9][28][29]
  • Musée d'art contemporain de Montréal[10]
France
  • Cinémathèque Française
Germany
  • SMIDAK Filmproduktion[31]
Ireland
  • Irish Film Institute
Slovakia
  • RTV Slovakia[32]
Slovenia
  • RTV Slovenija[33]
Switzerland
  • AV Preservation by reto.ch[34]
  • HTW Chur
  • Archives de la Ville de Lausanne
United Arab Emirates
  • Sharjah Media Corporation (SMC).[35]
United Kingdom
  • The National Archives (United Kingdom)
  • The Media Archive for Central England
United States
  • City University of New York Television (CUNY TV)[36]
  • National Library of Medicine (Washington DC)
  • University of Notre Dame Archives
  • University of Texas Libraries (FFV1 in MKV for DVD preservation[37])
  • Indiana University[15]
  • New York Public Library
  • University of Georgia, Walter J. Brown Media Archives

Development and improvements

The "Österreichische Mediathek" has also developed DVA-Profession[11] a Free Software solution for archive-suitable mass video digitization, mainly using FFV1 as video encoding throughout the whole workflow, without transcoding. Additionally, they have initiated the development of "FFV1.3" (=version 3 of FFV1) together with Michael Niedermayer (FFmpeg), Peter Bubestinger and Dave Rice.

FFV1.3 contains improvements and new features such as support for multi-threaded encoding/decoding, error resilience and integrity validation by CRC checksums, storing of display aspect ratio (DAR) and field order. It was tested for over 1 year,[40] and officially released stable for production in August 2013.[41]

In August 2016, support for 48bit/16bpc (=bits per component) in RGB was added.[42]

Before that, 16bpc in FFV1 were only supported in YCbCr and RGB was limited to 14bpc.

Suitable as preservation codec

Within the video archiving domain, the interest in FFV1 is increasing, as can be seen in a thread on the AMIA-L mailing list,[43] the PrestoCentre Forum[44] or the Archivematica mailing list.[45][46]

Companies are also picking up FFV1 support. For example, NOA (formerly "NOA Audio Solutions"), announced support for the FFV1 in their product line in July 2013[47] and KEM-Studiotechnik released a film-scanner with FFV1 output in November 2013.[48]

In an interview for The New York Times magazine about "Tips on Archiving Family History",[49] Bertram Lyons from the U.S. Library of Congress says:

{{quotation |

"[...] for video, there are many choices when it comes to codecs (the way the bits are encoded/decoded to represent the visual data, e.g., ffv1, H.264, Apple ProRes) [...]" }}

In January 2013, the possible use and adoption of FFV1 as an archiving codec was addressed in the issue of PrestoCentre's[12] AV Insider magazine:[51]

{{quotation |

"FFV1 has many beneficial technical features [...], but adoption rates are relatively low compared with alternatives, for example JPEG2000. [...] But holding back too long only serves to self-perpetuate the status of FFV1.

The adoption by Archivematica and the Austrian Mediathek with their active promotion of FFV1 along with others may start to break this vicious circle. This could lead to a virtuous circle of wider take-up, to shared development, to incorporation into commercial products and a host of other benefits for the community." }}

PACKED - the "Centre of Expertise in Digital Heritage" in Belgium, say in an article about video formats for archiving:[13]

{{quotation |

"When removing the proprietary codecs from this list, only a few are left. [...] This basically leaves heritage institutions that want to use a lossless codec, with only two options: Jpeg2000 and FFV1." }}

In 2015, the International Federation of Television Archives (FIAT/IFTA) mentioned FFV1 explicitly in their call-for-presentations for their annual World Conference, asking "Is FFV1 the new JPEG2000"?.[53] A workshop titled "FFV1 for Preservation" is also featured.[54]

Applications supporting FFV1

Here is a list of applications known to be able to read and/or write FFV1 video files, either natively or by installing codec packages.

Entries marked with "-" means that they generally only support either encoding or decoding.

The term "built-in" means that the application can handle FFV1 without the necessity to install additional codec packages.

Applications that come with FFV1 support out of the box, usually use FFmpeg's or Libav's libraries in order to do so.

The list is far from being complete, and will be augmented over time:

Application Encoding Decoding Method
Adobe Premiere {{yes}} {{yes}} DirectShow[55][56]
Archivematica[57] {{yes}} {{yes}} built-in
AVID {{unknown}} {{yes}} Their transcoder can handle FFV1
Avidemux {{yes}} {{yes}} built-in
Blender {{yes}}[58] {{yes}} built-in
DVA-Profession[14] {{yes}} {{yes}} built-in
ffdshow-tryouts {{yes}} {{yes}} built-in
FFmpeg {{yes}} {{yes}} built-in
Harris Broadcast Velocity {{yes}} {{yes}} Video for Windows[55]
kdenlive {{yes}} {{yes}} built-in
KEM Scan (motion picture film scanner)[48][15] {{yes}} - built-in
LAV Filters[56] {{yes}} {{yes}} built-in
MediaInfo - {{yes}} built-in
Media Lovin' Toolkit[16] {{yes}} {{yes}} built-in
Media Player Classic - {{yes}} built-in
MPlayer/MEncoder {{yes}} {{yes}} built-in
NOA MediaButler[17] {{yes}} {{yes}} built-in
QUADRIGA Video[18] {{yes}}[19] {{unknown}} {{unknown}}
Shotcut[20] {{yes}} {{yes}} built-in
Sorenson Squeeze {{unknown}} {{yes}} built-in
VirtualDub {{yes}} {{yes}} Video for Windows[55]
VLC media player {{no}} {{yes}} built-in
Windows Media Player {{unknown}} {{yes}} DirectShow[55][56]

Compression details

FFV1 is not strictly an intra-frame format; despite not using inter-frame prediction, it allows the context model to adapt over multiple frames. This can be useful for compression due to the very large size of the context table, but can be disabled to force the encoder to generate a strictly intra-frame bitstream. As the gained compression seems to decrease[72] with later versions of FFV1 (version 2,3), the use of GOP size greater than "1" might disappear in the future.

Prediction process

During progressive scanning of a frame, the difference between a current pixel and its predicted value, judging by neighboring pixels, is sent to the entropy-coding process. The prediction is done as follows:

Prediction = Median( Top, Left, Top + Left - TopLeft )

The third value, "Top + Left - TopLeft", is effectively equivalent to applying the top predictor to the current and the left sample, followed by applying the left predictor to the prediction residual of the top predictor. This method, also known as the gradient, exploits both horizontal and vertical redundancy. So in simple terms the prediction is the median of the top, left, and gradient prediction methods. For improved performance and simplicity, the edges of the frame are assumed to be zero to avoid special cases. The prediction in encoding and decoding is managed using a ring buffer.[21]

Entropy coding process

The residuals are coded using either variable-length coding or arithmetic coding. Both options use a very large context model. The "small" context model uses (11*11*11+1)/2=666 contexts based on the neighboring values of (Left-TopLeft), (TopLeft-Top), and (Top-TopRight). The "large" context model uses (11*11*5*5*5+1)/2=7563 contexts based on the same values as before, but also (TopTop - Top) and (LeftLeft-Left), where "TopTop" is the pixel two above the current one vertically, and "LeftLeft" is the pixel two to the left of the current one. In arithmetic coding, each "context" actually has 32 sub-contexts used for various portions of coding each residual, resulting in a grand total of 242,016 contexts for the "large" model. The arithmetic coder of FFV1 is very similar to (and based on) that of H.264.

Status

On April 16, 2006, a commit-message by Michael Niedermayer confirmed that the bitstream of FFV1 (version 1) is frozen:[74]

{{quotation |

"ffv1 and ffvhuff haven't changed since a long time and no one proposed any

changes within 1 month after my warning so they are officially no longer

experimental and we will guarantee decodability of files encoded with

the current ffv1/ffvhuff in the future"}}

Codec

Version 1 (FFV1.1)

The bitstream of version 1 is frozen and considered stable for production use since April 2006.[74]

The remark "experimental" in the source code was overlooked back then and removed in March 2010.[76]

Version 2 (FFV1.2)

Version 2 was an intermediate version, that was never officially released and should not be used for production purpose.

Version 3 (FFV1.3)

The bitstream of version 3 is frozen since August 3, 2013.[77] The final commit marking this version as officially released for production usage was on August 26, 2013.[41]

There is still no any VFW multithreaded encoder of FFV1.3 for Windows in 2017. FFdshow can encode only FFV1.1 stream with single CPU core.

Version 4 (FFV1.4)

Improvements beyond FFV1.3 are work in progress and being discussed on the IETF "CELLAR" mailing list.[79]

Planned are additional support for color-handling, especially non-linear/logarithmic color spaces.

Documentation

The current authoritative documentation was started in April 2012, and stayed in a very basic state until 2015.

In 2015, as part of the IETF standardization process, the documentation is now improved and reviewed by the CELLAR working group in close cooperation with Michael Niedermayer.[81]

See also

{{Portal|Free and open-source software}}
  • FFmpeg
  • List of lossless compression video codecs{{Clear}}
  • Results of FFV1 performance in comparison of different lossless video codecs, performed by Moscow State University in 2007[22]

References

1. ^{{cite web|url=http://git.videolan.org/?p=ffmpeg.git;a=history;f=libavcodec/ffv1.c;h=070e0240a2b1243fba4cbdc20716e36b5022a6e5;hb=HEAD;pg=1|title=Repository history of FFV1's sourcecode in FFMPEG repository|last1=|first1=|last2=|first2=|date=|work=|publisher=Michael Niedermayer|accessdate=21 October 2010|deadurl=yes|archiveurl=https://web.archive.org/web/20120323190532/http://git.videolan.org/?p=ffmpeg.git%3Ba%3Dhistory%3Bf%3Dlibavcodec%2Fffv1.c%3Bh%3D070e0240a2b1243fba4cbdc20716e36b5022a6e5%3Bhb%3DHEAD%3Bpg%3D1|archivedate=23 March 2012|df=}}
2. ^https://code.google.com/p/lavfilters/
3. ^1 {{cite web|url=http://www.records.nsw.gov.au/recordkeeping/government-recordkeeping-manual/guidance/guidelines/guideline-22/digital-audio-and-video-file-formats-form/formats-and-codecs-for-digital-video-preservation |title=Formats and codecs for digital video preservation (Guideline 22) |date=August 2013 |work= |publisher=NSW State Records |accessdate=10 November 2013 |deadurl=yes |archiveurl=https://web.archive.org/web/20131110105550/http://www.records.nsw.gov.au/recordkeeping/government-recordkeeping-manual/guidance/guidelines/guideline-22/digital-audio-and-video-file-formats-form/formats-and-codecs-for-digital-video-preservation |archivedate=10 November 2013 |df= }}
4. ^http://www.digitizationguidelines.gov/about/
5. ^{{cite web|url=http://www.digitalpreservation.gov/formats/fdd/fdd000349.shtml|title=AVI File Format with FFV1 video encoding|date=2012-07-20|series=Digital Preservation|publisher=LoC|id=fdd000349|work=AVI_FFV1|accessdate=2015-04-22}}
6. ^{{cite web|url=http://www.digitalpreservation.gov/formats/fdd/fdd000343.shtml|title=Matroska File Format with FFV1 video encoding|date=2012-05-29|series=Digital Preservation|publisher=LoC|id=fdd000343|work=Matroska_FFV1|accessdate=2015-04-22}}
7. ^landesmuseum.net
8. ^mediathek.at
9. ^http://vancouver.ca/ctyclerk/archives/
10. ^Musée d'art contemporain de Montréal (Archives and Media Centre)
11. ^dva-profession.mediathek.at
12. ^[https://www.prestocentre.org/ prestocentre.org]
13. ^{{cite web |url=http://scart.be/?q=en/content/short-guide-choosing-digital-format-video-archiving-masters |title=A short guide to choosing a digital format for video archiving masters |author=Emanuel Lorrain |date=March 2014 |work= |publisher=PACKED, Belgium |accessdate=2 June 2014}}
14. ^{{cite web |url=http://dva-profession.mediathek.at/fileadmin/MEDIASERVER/dva-profession-html/documentation/2-dva-profession-used-at-the-austrian-mediathek/index.html#c781 |title=DVA-Profession used at the Austrian Mediathek: Codec |publisher=Österreichische Mediathek |accessdate=2016-03-31}}
15. ^{{cite web |url=http://kem-studiotechnik.de/produkte/kemscan.html |title=KEM Scan |publisher=KEM Studiotechnik GmbH |accessdate=2015-04-30}}
16. ^{{cite web |url=http://www.mltframework.org/ |title=Media Lovin Toolkit (MLT/melt) |publisher=Dan Dennedy |accessdate=2015-04-27}}
17. ^{{cite web |url=http://www.noa-audio.com/products/actline/mediabutler/ |title=NOA MediaButler |publisher=NOA Audio Solutions GmbH |accessdate=2015-04-27}}
18. ^{{cite web |url=https://www.cube-tec.com/en-uk/products/video/quadriga-video/overview |title=Video Tape Migration with Quadriga |publisher=CubeTec International |accessdate=2016-03-31}}
19. ^{{cite web |url=http://cube-tec.com/en-uk/products/video/quadriga-video/specifications |title=QUADRIGA Video Specifications |publisher=CubeTec International |accessdate=2016-03-31}}
20. ^{{cite web |url=http://www.shotcut.org/ |title=Shotcut |publisher=Dan Dennedy |accessdate=2015-04-27}}
21. ^{{cite web|url=http://www.ffmpeg.org/~michael/ffv1.html|title=FFV1 Video Codec Specification|author=Michael Niedermayer|date=2013-09-05|accessdate=2015-03-18|publisher=FFmpeg}}
22. ^{{cite web |url=http://compression.ru/video/codec_comparison/lossless_codecs_2007_en.html |title=Lossless Video Codecs Comparison ‘2007 |publisher=Graphics & Media Lab Video Group of Moscow State University |accessdate=2015-04-27}}
23. ^1 {{cite web|url=https://github.com/FFmpeg/FFV1/blob/master/ffv1.md|title=The FFV1 Video Codec Specification (Development Draft)|accessdate=2016-08-19|date=2016-07-31|author=Michael Niedermayer}}
24. ^1 {{cite web |url=http://www.digitalpreservation.gov/formats/fdd/fdd000127.shtml |title=Motion JPEG 2000 at digitalpreservation.gov |last1= |first1= |last2= |first2= |date= |work= |publisher=U.S. Library of Congress |accessdate=6 March 2013}}
25. ^1 {{cite web |url=http://www.digitalpreservation.gov/formats/fdd/fdd000341.shtml |title=FFV1 at digitalpreservation.gov |date=29 May 2012 |publisher=U.S. Library of Congress |accessdate=10 November 2013}}
26. ^1 {{cite web |url=http://www.digitalpreservation.gov:8081/formats/fdd/fdd000342.shtml |title=Matroska video container information at digitalpreservation.gov |last1= |first1= |last2= |first2= |date= |work= |publisher=U.S. Library of Congress |accessdate=10 May 2012}}
27. ^1 {{cite web |url=http://www.vancouverarchives.ca/2011/11/celebrating-%e2%80%9chollywood-north%e2%80%9d-yaletown-productions-inc-fonds/ |title=A City of Vancouver Archives' blog post mentioning their use of FFV1 |last1= |first1= |last2= |first2= |date= |work= |publisher=City of Vancouver Archives |accessdate=10 May 2012}}
28. ^1 2 {{cite web|url=http://git.videolan.org/?p=ffmpeg.git;a=commit;h=b548f2b91b701e1235608ac882ea6df915167c7e|title=Repository commit message: Bitstream FFV1.1 frozen|last1=|first1=|last2=|first2=|date=14 April 2006|work=|publisher=Michael Niedermayer|accessdate=8 May 2012|deadurl=yes|archiveurl=https://web.archive.org/web/20160304084012/http://git.videolan.org/?p=ffmpeg.git%3Ba%3Dcommit%3Bh%3Db548f2b91b701e1235608ac882ea6df915167c7e|archivedate=4 March 2016|df=}}
29. ^1 {{cite web |url=http://lists.ffmpeg.org/pipermail/ffmpeg-devel/2013-August/146828.html |title=Mailing list post: Bitstream FFV1.3 frozen |last1= |first1= |last2= |first2= |date=3 August 2013 |work= |publisher=Michael Niedermayer |accessdate=29 August 2013}}
30. ^1 2 {{cite web |url=http://git.videolan.org/?p=ffmpeg.git;a=commit;h=abe76b851c05eea8743f6c899cbe5f7409b0f301 |title=Repository commit message: FFV1.3 released as stable |last1=Niedermayer |first1=Michael |date=26 August 2013 |work= |publisher=FFmpeg |accessdate=29 August 2013 |deadurl=yes |archiveurl=https://web.archive.org/web/20160304042753/http://git.videolan.org/?p=ffmpeg.git%3Ba%3Dcommit%3Bh%3Dabe76b851c05eea8743f6c899cbe5f7409b0f301 |archivedate=4 March 2016 |df= }}
31. ^1 {{cite web |url=http://git.videolan.org/?p=ffmpeg.git;a=commit;h=62f5e601aa4d42cf17f5f4331a2b7e2b533d4e69 |title=Repository commit message: avcodec/ffv1enc: Add RGB48 support |last1=Niedermayer |first1=Michael |date=16 August 2016 |publisher=FFmpeg |accessdate=18 August 2016}}
32. ^1 {{cite web |url=http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/2012-April/122967.html |title=Message on FFmpeg developer mailing list about the impact of GOP size parameter of FFV1 |last1= |first1= |last2= |first2= |date= |work= |publisher= |accessdate=10 May 2012}}
33. ^1 {{cite web|url=http://git.videolan.org/?p=ffmpeg.git;a=commit;h=0e22d68834ad260c599bd53e7f155864873a3310|title=Repository commit message|last1=|first1=|last2=|first2=|date=22 March 2010|work=|publisher=Michael Niedermayer|accessdate=21 October 2010|deadurl=yes|archiveurl=https://web.archive.org/web/20120323190630/http://git.videolan.org/?p=ffmpeg.git%3Ba%3Dcommit%3Bh%3D0e22d68834ad260c599bd53e7f155864873a3310|archivedate=23 March 2012|df=}}
34. ^1 {{cite web |url=http://lsv.uky.edu/scripts/wa.exe?A1=ind1212&L=amia-l&D=0#42 |title=FFV1 discussion on AMIA-L mailing list |last1= |first1= |last2= |first2= |date=December 2012 |work= |publisher=AMIA |accessdate=6 March 2013}}
35. ^1 {{cite web |url=https://www.prestocentre.org/forum/digital-master-archive-format |archive-url=https://archive.is/20130415221508/https://www.prestocentre.org/forum/digital-master-archive-format |dead-url=yes |archive-date=15 April 2013 |title=Digital master archive format |last1= |first1= |last2= |first2= |date=26 October 2012 |work= |publisher=PrestoCentre Forums |accessdate=6 March 2013 }}
36. ^1 {{cite web |url=https://groups.google.com/forum/?fromgroups=#!topic/archivematica/HulV96gJ0go |title=FFV1 vs other formats for preservation |last1= |first1= |last2= |first2= |date=24 September 2012 |work= |publisher=Archivematica mailing list |accessdate=6 March 2013}}
37. ^1 {{cite web |url=https://groups.google.com/forum/?fromgroups=#!topic/archivematica/eXDVP-6plAo |title=Digital film archiving in big scale |last1= |first1= |last2= |first2= |date=29 January 2013 |work= |publisher=Archivematica mailing list |accessdate=6 March 2013}}
38. ^1 {{cite magazine |last1=Addis |first1=Matthew |last2= |first2= |year=2013 |title=Crossing the Chasm (From Research Results to Sustainable Tools and Services for AV) |magazine=AV Insider Magazine |volume= |issue=#3 |pages=14–15 |publisher=PrestoCentre |doi= |url=https://www.prestocentre.org/library/resources/av-insider-3-preservation-technology-making-connection}}
39. ^1 {{cite magazine |last1=Lyons |first1=Bertram |last2= |first2= |year=2013 |title=Ask an Expert: Tips on Archiving Family History, Part 3 |magazine=The New York Times Magazine (online) |volume= |issue= |publisher=The New York Times |doi= |url=https://www.nytimes.com/2013/06/12/booming/tips-on-archiving-family-history-part-3.html}}
40. ^1 {{cite web |url=http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Output/Video |title=Blender v2.6 Manual: Render/Output/Video |last1= |first1= |last2= |first2= |date=18 November 2011 |work= |publisher=Blender Foundation |accessdate=4 August 2013}}
41. ^1 {{cite web |url=http://www.theiabm.org/article.php?group_id=9168 |title=Company announcement confirming FFV1 support |last1= |first1= |last2= |first2= |date=10 July 2013 |work= |publisher=NOA Audio Solutions |accessdate=29 August 2013 |deadurl=yes |archiveurl=https://web.archive.org/web/20160413130348/http://www.theiabm.org/article.php?group_id=9168 |archivedate=13 April 2016 |df= }}
42. ^1 {{cite web |url=http://page2pixel.org/amia-iasa2010/ |title=AMIA/IASA 2010 - Wrappers and Codecs: A Survey of Selection Strategies |last1=Fleischhauer |first1=Carl |last2=Frost |first2=Hannah |last3=Beard |first3=Isaiah |date=November 2010 |work= |publisher=AMIA/IASA |accessdate=6 October 2013}}
43. ^1 2 {{cite web |url=http://download.das-werkstatt.com/pb/mthk/info/video/comparison_video_codecs_containers.html#codec_tests |title=Comparing video codecs and containers for archives |last1=Bubestinger |first1=Peter |last2= |first2= |date= |work= |publisher=Österreichische Mediathek |accessdate=8 October 2014}}
44. ^1 {{cite web |url=http://compression.ru/video/codec_comparison/pdf/lossless_codecs_test_en.pdf |title=MSU Lossless Video Codecs Comparison |last1= |first1= |last2= |first2= |date=March 2014 |work= |publisher=MSU Graphics & Media Lab (Video Group) |accessdate=8 October 2014}}
45. ^1 {{cite web |url=http://download.das-werkstatt.com/pb/mthk/ffv1_stats/latest/ |title=FFV1 performance statistics |last1=Bubestinger |first1=Peter |last2= |first2= |date=6 February 2014 |work= |publisher=Österreichische Mediathek |accessdate=8 October 2014}}
46. ^1 {{cite web |url=https://cerebrum.noa-archive.com/info/#0 |title=Graphs about FFV1 performance (transcoding, retrieval) |last1= |first1= |last2= |first2= |date= |work= |publisher=NOA GmbH |accessdate=8 October 2014}}
47. ^1 2 {{cite web |url=http://www.digitizationguidelines.gov/guidelines/video_reformatting_compare.html |title=Digital File Formats for Videotape Reformatting |last1=Fleischhauer |first1=Carl |last2=Egan |first2=Courtney |date=8 September 2014 |work= |publisher=FADGI (U.S. Library of Congress) |accessdate=8 October 2014}}
48. ^1 {{cite web |url=http://blogs.loc.gov/digitalpreservation/2014/12/comparing-formats-for-video-digitization/ |title=Comparing Formats for Video Digitization |last1=Fleischhauer |first1=Carl |last2=Murray |first2=Kate |date=3 December 2014 |work= |publisher=FADGI (U.S. Library of Congress) |accessdate=8 September 2015}}
49. ^1 {{cite web |url=http://dva-profession.mediathek.at/documentation/2-dva-profession-used-at-the-austrian-mediathek/#c781 |title=DVA-Profession used at the Austrian Mediathek: Codec |last1=Lewetz |first1=Hermann |last2= |first2= |date=30 August 2011 |work= |publisher=Österreichische Mediathek |accessdate=8 October 2014}}
50. ^1 2 {{cite web |url=http://kem-studiotechnik.de/uploads/media/KEM_scan_data-sheet_01.pdf |title=KEM SCAN Film Scanner Data Sheet |last1=Kober |first1=Helmfried |last2= |first2= |date=14 November 2013 |work= |publisher=KEM-Studiotechnik |accessdate=30 April 2015}}
51. ^1 {{cite web |url=https://conferences.tdl.org/tcdl/index.php/TCDL/TCDL2013/paper/view/648/250 |title=Automated Archiving of DVD Content (Presentation at TCDL 2013) |last1=Esteva |first1=Maria |last2=Vega |first2=Karla |last3=Henriksen |first3=Vandy |last4=Lee |first4=Jennifer |last5=Martin |first5=Wendy |date=May 2013 |work= |publisher=Texas Advanced Computing Center (TACC) and University of Texas at Austin - Libraries |accessdate=21 October 2014}}
52. ^{{cite web |url=http://www.flumeproductions.com/?p=737 |title=Video Codecs – ffmpeg/ffv1 |last1= |first1= |last2= |first2= |date=11 December 2013 |work= |publisher=Flume Productions Inc. |accessdate=21 October 2014}}
53. ^1 {{cite web |url=http://www2.archivists.org/sites/all/files/MAS%20E-rec%20project.pdf |title=Electronic Records Project |last1=Austen |first1=Barbara |last2=Bowling |first2=Melissa |last3=Deakyne |first3=Holly |last4=Evans |first4=Ryan |date=7 August 2013 |work= |publisher=Society of American Archivists |accessdate=21 October 2014}}
54. ^1 2 3 {{cite web |url=https://github.com/Nevcairiel/LAVFilters/releases |title=LAVFilters (Open-Source DirectShow Media Splitter and Decoders) |publisher=Hendrik Leppkes |accessdate=27 April 2015}}
55. ^1 2 3 4 {{cite web |url=http://ffdshow-tryout.sourceforge.net/ |title=ffdshow tryouts |accessdate=27 April 2015}}
56. ^1 {{cite web |url=https://www.archivematica.org/wiki/Format_policies |title=Archivematica - Format policies |publisher=Artefactual Systems Inc. |accessdate=2015-04-30}}
57. ^1 {{cite web |url=http://fiatifta.org/wp-content/uploads/2015/06/call-for-presentation-world-conference.pdf |title=Conference Call for Presentations, FIAT/IFTA World Conference Vienna 7-10 October 2015 |date=13 May 2015 |work= |publisher=International Federation of Television Archives |accessdate=2015-09-01 |deadurl=yes |archiveurl=https://web.archive.org/web/20151010024635/http://fiatifta.org/wp-content/uploads/2015/06/call-for-presentation-world-conference.pdf |archivedate=2015-10-10 |df= }}
58. ^1 {{cite web |url=http://fiatifta.org/world-conference-2015-vienna/programme-world-conference-2015/programma-world-conference-2015-dag-1/ |title=FIAT/IFTA World Conference 2015, Programme Day 1 |date=Aug 2015 |work= |publisher=International Federation of Television Archives |accessdate=2015-09-01 |deadurl=yes |archiveurl=https://web.archive.org/web/20150910130233/http://fiatifta.org/world-conference-2015-vienna/programme-world-conference-2015/programma-world-conference-2015-dag-1/ |archivedate=2015-09-10 |df= }}
59. ^1 2 {{cite web |url=http://blogs.loc.gov/digitalpreservation/2015/09/improving-technical-options-for-audiovisual-collections-through-the-preforma-project/ |title=Improving Technical Options for Audiovisual Collections Through the PREFORMA Project |last1=Murray |first1=Kate |last2=Rice |first2=Dave |last3=Blewer |first3=Ashley |date=September 23, 2015 |work= |publisher=U.S. Library of Congress |accessdate=2015-09-24}}
60. ^1 {{cite web |url=http://preforma-project.eu/ |title=PREservation FORMAts for culture information/e-archives (PREFORMA) |accessdate=2015-09-24}}
61. ^1 {{cite report | title = Conch – Appendix on Standardization Exercises | url = https://github.com/MediaArea/MediaConch/releases/download/2015.03.14/MediaAreaConch_Appendix_Standardization.pdf | publisher = MediaArea | first1 = Tessa | last1= Fallon | first2 = Dave | last2= Rice | first3 = Ashley | last3= Blewer | date = March 3, 2015 | format = PDF | accessdate = 2015-09-24}}
62. ^1 {{cite web |url=http://www.preforma-project.eu/mediaconch.html |title=CONformance CHecking for audiovisual files (CONCH) |accessdate=2015-09-24}}
63. ^1 {{cite web |url=http://smidakfilm.de/ |title=SMIDAK Filmproduktion |accessdate=2016-03-31}}
64. ^1 {{cite web |url=https://mailarchive.ietf.org/arch/msg/cellar/RFYBaQSuoULr8sIw9RfHwnfZKvQ |title=Discussion thread on FFV1 version 4 (on IETF CELLAR mailing list) |date=2016-01-05 |accessdate=2016-08-18}}
65. ^1 {{cite web |url=http://ndsr.nycdigital.org/media-miscro-services-and-archival-workflows-at-cuny-television/ |title=Media micro-services and archival workflows at CUNY Television |date=10 November 2015 |accessdate=19 August 2016}}
66. ^1 {{cite web |url=http://www.ebu.ch/metadata/cs/ebu_VideoCompressionCodeCS.xml |title=Video Compression Code (A combined list of video codecs inc. EBU, DVB and MPEG) |publisher=European Broadcasting Union |first1=Jean-Pierre |last1=Evain |date=15 August 2016 |accessdate=19 September 2016}}
67. ^1 {{cite web |url=http://www.noa-archive.com/news-and-events/news/installation-at-smc/ |title=Installation at SMC: United Arab Emirates First for NOA |publisher=NOA Archive GmbH |date=March 2018 |accessdate=15 March 2017}}
68. ^1 {{cite web |url=http://www.noa-archive.com/references/reference-national-broadcaster-of-slovenia-is-first-in-successfully-deploying-complete-video-archive-solutions-from-noa/ |title=National Broadcaster of Slovenia is first in successfully deploying Complete Video Archive Solutions from NOA |date=2014 |publisher=NOA GmbH |accessdate=10 May 2017}}
69. ^1 {{cite web |url=http://www.noa-archive.com/references/rtvs-slovakia-video-archive/ |title=RTVS Slovakia: Complete Video Archive System from NOA |date=1 September 2014 |publisher=NOA GmbH |accessdate=10 May 2017}}
70. ^1 {{cite web |url=https://avpres.net/FFmpeg/sq_MKV.html |title=Image sequence into Matroska/FFV1 |date=11 December 2016 |publisher=AV Preservation by reto.ch |accessdate=10 May 2017}}
[23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][53][54][55][56][57][58][59][60][61][62][63][64][65][66][67][68][69][70]
}}{{Compression formats}}{{Compression Software Implementations}}{{DEFAULTSORT:Ffv1}}

1 : Free video codecs
随便看

　

开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。

　

Copyright © 2023 OENC.NET All Rights Reserved
京ICP备2021023879号 更新时间：2024/9/20 18:39:12