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  • My journey to Coviu

    27 octobre 2015, par silvia

    My new startup just released our MVP – this is the story of what got me here.

    I love creating new applications that let people do their work better or in a manner that wasn’t possible before.

    German building and loan socityMy first such passion was as a student intern when I built a system for a building and loan association’s monthly customer magazine. The group I worked with was managing their advertiser contacts through a set of paper cards and I wrote a dBase based system (yes, that long ago) that would manage their customer relationships. They loved it – until it got replaced by an SAP system that cost 100 times what I cost them, had really poor UX, and only gave them half the functionality. It was a corporate system with ongoing support, which made all the difference to them.

    Dr Scholz und Partner GmbHThe story repeated itself with a CRM for my Uncle’s construction company, and with a resume and quotation management system for Accenture right after Uni, both of which I left behind when I decided to go into research.

    Even as a PhD student, I never lost sight of challenges that people were facing and wanted to develop technology to overcome problems. The aim of my PhD thesis was to prepare for the oncoming onslaught of audio and video on the Internet (yes, this was 1994 !) by developing algorithms to automatically extract and locate information in such files, which would enable users to structure, index and search such content.

    Many of the use cases that we explored are now part of products or continue to be challenges : finding music that matches your preferences, identifying music or video pieces e.g. to count ads on the radio or to mark copyright infringement, or the automated creation of video summaries such as trailers.

    CSIRO

    This continued when I joined the CSIRO in Australia – I was working on segmenting speech into words or talk spurts since that would simplify captioning & subtitling, and on MPEG-7 which was a (slightly over-engineered) standard to structure metadata about audio and video.

    In 2001 I had the idea of replicating the Web for videos : i.e. creating hyperlinked and searchable video-only experiences. We called it “Annodex” for annotated and indexed video and it needed full-screen hyperlinked video in browsers – man were we ahead of our time ! It was my first step into standards, got several IETF RFCs to my name, and started my involvement with open codecs through Xiph.

    vquence logoAround the time that YouTube was founded in 2006, I founded Vquence – originally a video search company for the Web, but pivoted to a video metadata mining company. Vquence still exists and continues to sell its data to channel partners, but it lacks the user impact that has always driven my work.

    As the video element started being developed for HTML5, I had to get involved. I contributed many use cases to the W3C, became a co-editor of the HTML5 spec and focused on video captioning with WebVTT while contracting to Mozilla and later to Google. We made huge progress and today the technology exists to publish video on the Web with captions, making the Web more inclusive for everybody. I contributed code to YouTube and Google Chrome, but was keen to make a bigger impact again.

    NICTA logoThe opportunity came when a couple of former CSIRO colleagues who now worked for NICTA approached me to get me interested in addressing new use cases for video conferencing in the context of WebRTC. We worked on a kiosk-style solution to service delivery for large service organisations, particularly targeting government. The emerging WebRTC standard posed many technical challenges that we addressed by building rtc.io , by contributing to the standards, and registering bugs on the browsers.

    Fast-forward through the development of a few further custom solutions for customers in health and education and we are starting to see patterns of need emerge. The core learning that we’ve come away with is that to get things done, you have to go beyond “talking heads” in a video call. It’s not just about seeing the other person, but much more about having a shared view of the things that need to be worked on and a shared way of interacting with them. Also, we learnt that the things that are being worked on are quite varied and may include multiple input cameras, digital documents, Web pages, applications, device data, controls, forms.

    Coviu logoSo we set out to build a solution that would enable productive remote collaboration to take place. It would need to provide an excellent user experience, it would need to be simple to work with, provide for the standard use cases out of the box, yet be architected to be extensible for specialised data sharing needs that we knew some of our customers had. It would need to be usable directly on Coviu.com, but also able to integrate with specialised applications that some of our customers were already using, such as the applications that they spend most of their time in (CRMs, practice management systems, learning management systems, team chat systems). It would need to require our customers to sign up, yet their clients to join a call without sign-up.

    Collaboration is a big problem. People are continuing to get more comfortable with technology and are less and less inclined to travel distances just to get a service done. In a country as large as Australia, where 12% of the population lives in rural and remote areas, people may not even be able to travel distances, particularly to receive or provide recurring or specialised services, or to achieve work/life balance. To make the world a global village, we need to be able to work together better remotely.

    The need for collaboration is being recognised by specialised Web applications already, such as the LiveShare feature of Invision for Designers, Codassium for pair programming, or the recently announced Dropbox Paper. Few go all the way to video – WebRTC is still regarded as a complicated feature to support.

    Coviu in action

    With Coviu, we’d like to offer a collaboration feature to every Web app. We now have a Web app that provides a modern and beautifully designed collaboration interface. To enable other Web apps to integrate it, we are now developing an API. Integration may entail customisation of the data sharing part of Coviu – something Coviu has been designed for. How to replicate the data and keep it consistent when people collaborate remotely – that is where Coviu makes a difference.

    We have started our journey and have just launched free signup to the Coviu base product, which allows individuals to own their own “room” (i.e. a fixed URL) in which to collaborate with others. A huge shout out goes to everyone in the Coviu team – a pretty amazing group of people – who have turned the app from an idea to reality. You are all awesome !

    With Coviu you can share and annotate :

    • images (show your mum photos of your last holidays, or get feedback on an architecture diagram from a customer),
    • pdf files (give a presentation remotely, or walk a customer through a contract),
    • whiteboards (brainstorm with a colleague), and
    • share an application window (watch a YouTube video together, or work through your task list with your colleagues).

    All of these are regarded as “shared documents” in Coviu and thus have zooming and annotations features and are listed in a document tray for ease of navigation.

    This is just the beginning of how we want to make working together online more productive. Give it a go and let us know what you think.

    http://coviu.com/

    The post My journey to Coviu first appeared on ginger’s thoughts.

  • How do I properly reduce the resolution of a 360 video using ffmpeg ?

    10 avril 2017, par user3799235

    I have tried reduction with the following technique from a scale of 2048:1024 with something like : ffmpeg -i eagle360half.mp4 -vf scale=1024:512 video360_1024.mp4 however the playback then becomes warped and warbly (visually similar to a bad vhs tape). I can only speculate that this has something to do with the meridians and equirectangular projections. How would I properly scale/ reduce resolution of a 360 video using ffmpeg, or is this possible with some other cli tool ?

    Here is the output of mediainfo, ffmpeg, and then mediainfo again :

    #######################MEDIAINFO OUTPUT PRE-ENCODING#################
    
$ mediainfo 360timessquare.mp4
    
General
    
Complete name                            : 360timessquare.mp4
    
Format                                   : MPEG-4
    
Format profile                           : Base Media / Version 2
    
Codec ID                                 : mp42
    
File size                                : 235 MiB
    
Duration                                 : 14mn 18s
    
Overall bit rate mode                    : Variable
    
Overall bit rate                         : 2 297 Kbps
    
Encoded date                             : UTC 2016-10-21 19:11:41
    
Tagged date                              : UTC 2016-10-21 19:11:41
    
gsst                                     : 0
    
gstd                                     : 858209
    

    
Video
    
ID                                       : 1
    
Format                                   : AVC
    
Format/Info                              : Advanced Video Codec
    
Format profile                           : Main@L3.1
    
Format settings, CABAC                   : Yes
    
Format settings, ReFrames                : 3 frames
    
Codec ID                                 : avc1
    
Codec ID/Info                            : Advanced Video Coding
    
Duration                                 : 14mn 18s
    
Bit rate                                 : 2 168 Kbps
    
Width                                    : 1 280 pixels
    
Height                                   : 720 pixels
    
Display aspect ratio                     : 16:9
    
Frame rate mode                          : Constant
    
Frame rate                               : 25.000 fps
    
Color space                              : YUV
    
Chroma subsampling                       : 4:2:0
    
Bit depth                                : 8 bits
    
Scan type                                : Progressive
    
Bits/(Pixel*Frame)                       : 0.094
    
Stream size                              : 222 MiB (94%)
    
Title                                    : ISO Media file produced by Google Inc.
    
Encoded date                             : UTC 2016-10-21 19:11:41
    
Tagged date                              : UTC 2016-10-21 19:11:41
    
Color range                              : Limited
    
Color primaries                          : BT.709
    
Transfer characteristics                 : BT.709
    
Matrix coefficients                      : BT.709
    

    
Audio
    
ID                                       : 2
    
Format                                   : AAC
    
Format/Info                              : Advanced Audio Codec
    
Format profile                           : LC
    
Codec ID                                 : 40
    
Duration                                 : 14mn 18s
    
Bit rate mode                            : Variable
    
Bit rate                                 : 126 Kbps
    
Channel(s)                               : 2 channels
    
Channel positions                        : Front: L R
    
Sampling rate                            : 44.1 KHz
    
Compression mode                         : Lossy
    
Stream size                              : 12.8 MiB (5%)
    
Title                                    : ISO Media file produced by Google Inc.
    
Encoded date                             : UTC 2016-10-21 19:11:41
    
Tagged date                              : UTC 2016-10-21 19:11:41
    

    

    

    
########################FFMPEG   LOG:#############################
    
$ffmpeg -i 360timessquare.mp4 -s 542x320 -o 360timessquare542x320.mp4
    
ffmpeg version 2.4 Copyright (c) 2000-2014 the FFmpeg developers
    
built on Sep 26 2015 22:27:26 with gcc 4.8.3 (GCC) 20140911 (Red Hat 4.8.3-9)
    
configuration: --prefix=/usr --bindir=/usr/bin --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/share/man --extra-libs=-ldl --enable-gpl --enable-nonfree --enable-libfdk_aac --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libfreetype --enable-fontconfig --enable-libspeex --enable-libtheora --enable-frei0r --enable-libopencv --enable-zlib --enable-shared --disable-htmlpages --disable-podpages --disable-txtpages
    
libavutil      54.  7.100 / 54.  7.100
    
libavcodec     56.  1.100 / 56.  1.100
    
libavformat    56.  4.101 / 56.  4.101
    
libavdevice    56.  0.100 / 56.  0.100
    
libavfilter     5.  1.100 /  5.  1.100
    
libswscale      3.  0.100 /  3.  0.100
    
libswresample   1.  1.100 /  1.  1.100
    
libpostproc    53.  0.100 / 53.  0.100
    
Unrecognized option 'o'.
    
Error splitting the argument list: Option not found
    
[kevin@clipcentric 360Video]$ ffmpeg -i 360timessquare.mp4 -vf -s 542x320 360timessquare542x320.mp4
    
ffmpeg version 2.4 Copyright (c) 2000-2014 the FFmpeg developers
    
built on Sep 26 2015 22:27:26 with gcc 4.8.3 (GCC) 20140911 (Red Hat 4.8.3-9)
    
configuration: --prefix=/usr --bindir=/usr/bin --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/share/man --extra-libs=-ldl --enable-gpl --enable-nonfree --enable-libfdk_aac --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libfreetype --enable-fontconfig --enable-libspeex --enable-libtheora --enable-frei0r --enable-libopencv --enable-zlib --enable-shared --disable-htmlpages --disable-podpages --disable-txtpages
    
libavutil      54.  7.100 / 54.  7.100
    
libavcodec     56.  1.100 / 56.  1.100
    
libavformat    56.  4.101 / 56.  4.101
    
libavdevice    56.  0.100 / 56.  0.100
    
libavfilter     5.  1.100 /  5.  1.100
    
libswscale      3.  0.100 /  3.  0.100
    
libswresample   1.  1.100 /  1.  1.100
    
libpostproc    53.  0.100 / 53.  0.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '360timessquare.mp4':
    
Metadata:
    
major_brand     : mp42
    
minor_version   : 0
    
compatible_brands: isommp42
    
creation_time   : 2016-10-21 19:11:41
    
Duration: 00:14:18.09, start: 0.000000, bitrate: 2296 kb/s
    
Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 1280x720 [SAR 1:1 DAR 16:9], 2168 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc (default)
    
Metadata:
    
creation_time   : 2016-10-21 19:11:41
    
handler_name    : ISO Media file produced by Google Inc.
    
Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default)
    
Metadata:
    
creation_time   : 2016-10-21 19:11:41
    
handler_name    : ISO Media file produced by Google Inc.
    
[NULL @ 0x14a0120] Unable to find a suitable output format for '542x320'
    
542x320: Invalid argument
    
[kevin@clipcentric 360Video]$ ffmpeg -i 360timessquare.mp4 -s 542x320 360timessquare542x320.mp4
    
ffmpeg version 2.4 Copyright (c) 2000-2014 the FFmpeg developers
    
built on Sep 26 2015 22:27:26 with gcc 4.8.3 (GCC) 20140911 (Red Hat 4.8.3-9)
    
configuration: --prefix=/usr --bindir=/usr/bin --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/share/man --extra-libs=-ldl --enable-gpl --enable-nonfree --enable-libfdk_aac --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libfreetype --enable-fontconfig --enable-libspeex --enable-libtheora --enable-frei0r --enable-libopencv --enable-zlib --enable-shared --disable-htmlpages --disable-podpages --disable-txtpages
    
libavutil      54.  7.100 / 54.  7.100
    
libavcodec     56.  1.100 / 56.  1.100
    
libavformat    56.  4.101 / 56.  4.101
    
libavdevice    56.  0.100 / 56.  0.100
    
libavfilter     5.  1.100 /  5.  1.100
    
libswscale      3.  0.100 /  3.  0.100
    
libswresample   1.  1.100 /  1.  1.100
    
libpostproc    53.  0.100 / 53.  0.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '360timessquare.mp4':
    
Metadata:
    
major_brand     : mp42
    
minor_version   : 0
    
compatible_brands: isommp42
    
creation_time   : 2016-10-21 19:11:41
    
Duration: 00:14:18.09, start: 0.000000, bitrate: 2296 kb/s
    
Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 1280x720 [SAR 1:1 DAR 16:9], 2168 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc (default)
    
Metadata:
    
creation_time   : 2016-10-21 19:11:41
    
handler_name    : ISO Media file produced by Google Inc.
    
Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default)
    
Metadata:
    
creation_time   : 2016-10-21 19:11:41
    
handler_name    : ISO Media file produced by Google Inc.
    
[libx264 @ 0x25f7a60] using SAR=2560/2439
    
[libx264 @ 0x25f7a60] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX AVX2 FMA3 LZCNT BMI2
    
[libx264 @ 0x25f7a60] profile High, level 2.1
    
[libx264 @ 0x25f7a60] 264 - core 142 - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=3 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    
Output #0, mp4, to '360timessquare542x320.mp4':
    
Metadata:
    
major_brand     : mp42
    
minor_version   : 0
    
compatible_brands: isommp42
    
encoder         : Lavf56.4.101
    
Stream #0:0(und): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 542x320 [SAR 2560:2439 DAR 16:9], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
    
Metadata:
    
creation_time   : 2016-10-21 19:11:41
    
handler_name    : ISO Media file produced by Google Inc.
    
encoder         : Lavc56.1.100 libx264
    
Stream #0:1(und): Audio: aac (libfdk_aac) ([64][0][0][0] / 0x0040), 44100 Hz, stereo, s16, 128 kb/s (default)
    
Metadata:
    
creation_time   : 2016-10-21 19:11:41
    
handler_name    : ISO Media file produced by Google Inc.
    
encoder         : Lavc56.1.100 libfdk_aac
    
Stream mapping:
    
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
    
Stream #0:1 -> #0:1 (aac (native) -> aac (libfdk_aac))
    
Press [q] to stop, [?] for help
    
frame=21452 fps= 66 q=-1.0 Lsize=   64454kB time=00:14:18.09 bitrate= 615.3kbits/s
    
video:50428kB audio:13439kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.918954%
    
[libx264 @ 0x25f7a60] frame I:86    Avg QP:19.09  size: 45669
    
[libx264 @ 0x25f7a60] frame P:18026 Avg QP:22.11  size:  2541
    
[libx264 @ 0x25f7a60] frame B:3340  Avg QP:29.11  size:   572
    
[libx264 @ 0x25f7a60] consecutive B-frames: 75.9%  6.9%  9.6%  7.6%
    
[libx264 @ 0x25f7a60] mb I  I16..4:  3.4% 30.9% 65.7%
    
[libx264 @ 0x25f7a60] mb P  I16..4:  0.1%  0.3%  0.3%  P16..4: 25.1%  6.6%  7.4%  0.0%  0.0%    skip:60.2%
    
[libx264 @ 0x25f7a60] mb B  I16..4:  0.0%  0.1%  0.1%  B16..8: 13.3%  2.4%  1.3%  direct: 1.9%  skip:81.0%  L0:25.9% L1:66.1% BI: 8.0%
    
[libx264 @ 0x25f7a60] 8x8 transform intra:38.5% inter:48.3%
    
[libx264 @ 0x25f7a60] coded y,uvDC,uvAC intra: 81.5% 84.3% 58.6% inter: 14.3% 14.5% 2.8%
    
[libx264 @ 0x25f7a60] i16 v,h,dc,p:  7% 49%  7% 37%
    
[libx264 @ 0x25f7a60] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 12% 25% 17%  5%  7%  7% 11%  8%  9%
    
[libx264 @ 0x25f7a60] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 16% 18% 14%  7%  8% 10% 11%  9%  7%
    
[libx264 @ 0x25f7a60] i8c dc,h,v,p: 51% 25% 15%  9%
    
[libx264 @ 0x25f7a60] Weighted P-Frames: Y:1.5% UV:0.3%
    
[libx264 @ 0x25f7a60] ref P L0: 77.6% 15.9%  5.2%  1.3%  0.0%
    
[libx264 @ 0x25f7a60] ref B L0: 94.0%  5.1%  0.9%
    
[libx264 @ 0x25f7a60] ref B L1: 96.1%  3.9%
    
[libx264 @ 0x25f7a60] kb/s:481.43
    

    
#################POST ENCODING #####################
    
$ mediainfo 360timessquare542x320.mp4
    
General
    
Complete name                            : 360timessquare542x320.mp4
    
Format                                   : MPEG-4
    
Format profile                           : Base Media
    
Codec ID                                 : isom
    
File size                                : 62.9 MiB
    
Duration                                 : 14mn 18s
    
Overall bit rate                         : 615 Kbps
    
Encoded date                             : UTC 1904-01-01 00:00:00
    
Tagged date                              : UTC 1904-01-01 00:00:00
    
Writing application                      : Lavf56.4.101
    

    
Video
    
ID                                       : 1
    
Format                                   : AVC
    
Format/Info                              : Advanced Video Codec
    
Format profile                           : High@L2.1
    
Format settings, CABAC                   : Yes
    
Format settings, ReFrames                : 4 frames
    
Codec ID                                 : avc1
    
Codec ID/Info                            : Advanced Video Coding
    
Duration                                 : 14mn 18s
    
Bit rate                                 : 481 Kbps
    
Width                                    : 542 pixels
    
Height                                   : 320 pixels
    
Display aspect ratio                     : 16:9
    
Frame rate mode                          : Constant
    
Frame rate                               : 25.000 fps
    
Color space                              : YUV
    
Chroma subsampling                       : 4:2:0
    
Bit depth                                : 8 bits
    
Scan type                                : Progressive
    
Bits/(Pixel*Frame)                       : 0.111
    
Stream size                              : 49.2 MiB (78%)
    
Writing library                          : x264 core 142
    
Encoding settings                        : cabac=1 / ref=3 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=3 / lookahead_threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=1 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=crf / mbtree=1 / crf=23.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
    
Encoded date                             : UTC 1904-01-01 00:00:00
    
Tagged date                              : UTC 1904-01-01 00:00:00
    

    
Audio
    
ID                                       : 2
    
Format                                   : AAC
    
Format/Info                              : Advanced Audio Codec
    
Format profile                           : LC
    
Codec ID                                 : 40
    
Duration                                 : 14mn 18s
    
Bit rate mode                            : Constant
    
Bit rate                                 : 128 Kbps
    
Channel(s)                               : 2 channels
    
Channel positions                        : Front: L R
    
Sampling rate                            : 44.1 KHz
    
Compression mode                         : Lossy
    
Stream size                              : 13.1 MiB (21%)
    
Encoded date                             : UTC 1904-01-01 00:00:00
    
Tagged date                              : UTC 1904-01-01 00:00:00

  • lavc : Drop deprecated options moved to private contexts

    16 mars 2017, par Vittorio Giovara
    lavc : Drop deprecated options moved to private contexts

    Deprecated in 10/2014 and 07/2015.
    • [DBH] libavcodec/avcodec.h
    • [DBH] libavcodec/dnxhdenc.c
    • [DBH] libavcodec/internal.h
    • [DBH] libavcodec/libvpxenc.c
    • [DBH] libavcodec/libx264.c
    • [DBH] libavcodec/libxavs.c
    • [DBH] libavcodec/libxvid.c
    • [DBH] libavcodec/motion_est.c
    • [DBH] libavcodec/mpegvideo.h
    • [DBH] libavcodec/mpegvideo_enc.c
    • [DBH] libavcodec/options.c
    • [DBH] libavcodec/options_table.h
    • [DBH] libavcodec/svq1enc.c
    • [DBH] libavcodec/version.h

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