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Autres articles (37)

Contribute to documentation

13 avril 2011

Documentation is vital to the development of improved technical capabilities.
MediaSPIP welcomes documentation by users as well as developers - including : critique of existing features and functions articles contributed by developers, administrators, content producers and editors screenshots to illustrate the above translations of existing documentation into other languages
To contribute, register to the project users’ mailing (...)
Selection of projects using MediaSPIP

2 mai 2011, par kent1

The examples below are representative elements of MediaSPIP specific uses for specific projects.
MediaSPIP farm @ Infini
The non profit organizationInfini develops hospitality activities, internet access point, training, realizing innovative projects in the field of information and communication technologies and Communication, and hosting of websites. It plays a unique and prominent role in the Brest (France) area, at the national level, among the half-dozen such association. Its members (...)
Use, discuss, criticize

13 avril 2011, par kent1

Talk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
A discussion list is available for all exchanges between users.

1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | ... | 13

Sur d’autres sites (5685)

batch i need to encode hole folder files

4 mai 2019, par jonedave

I need one batch code for ffmpeg which can encode & zoom resolution of all videos inside folder to 110% & 125% of original using batch code.

Here are some codes which I test not working :

for %%a in ("*.*") do ffmpeg -i "%%a"  -vf scale=2*iw:-1, crop=iw/2:ih/2" "newfiles\%%~na.mp4"

pause

for %%a in ("*.*") do ffmpeg -i "%%a" -vf "zoompan=z='1+(1.4*in/300)':x='70*in/300':y='190*in/300':d=1"  "newfiles\%%~na.mp4"

for %%a in ("*.*") do ffmpeg -i "%%a" -vf "zoompan=z='1+(1.4*in/300"  "newfiles\%%~na.mp4"

pause

error i getting

C:\down\Compressed\DRIVER PACK FOR MOBILE PHONE\DRIVER PACK FOR MOBILE PHONE>ffm

peg -i "avutil-ics-56.dll" -vf "zoompan=z='1+(1.4*in/300"  "newfiles\avutil-ics-

56.mp4"

ffmpeg version N-93461-g6e42021128 Copyright (c) 2000-2019 the FFmpeg developers



  built with gcc 8.2.1 (GCC) 20190212

  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfi

g --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libb

luray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enab

le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --e

nable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable

-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 -

-enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enab

le-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --en

able-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --en

able-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --e

nable-dxva2 --enable-avisynth --enable-libopenmpt

  libavutil      56. 26.100 / 56. 26.100

  libavcodec     58. 47.105 / 58. 47.105

  libavformat    58. 26.101 / 58. 26.101

  libavdevice    58.  7.100 / 58.  7.100

  libavfilter     7. 48.100 /  7. 48.100

  libswscale      5.  4.100 /  5.  4.100

  libswresample   3.  4.100 /  3.  4.100

  libpostproc    55.  4.100 / 55.  4.100

avutil-ics-56.dll: Invalid data found when processing input



C:\down\Compressed\DRIVER PACK FOR MOBILE PHONE\DRIVER PACK FOR MOBILE PHONE>ffm

peg -i "ffmpeg.exe" -vf "zoompan=z='1+(1.4*in/300"  "newfiles\ffmpeg.mp4"

ffmpeg version N-93461-g6e42021128 Copyright (c) 2000-2019 the FFmpeg developers



  built with gcc 8.2.1 (GCC) 20190212

  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfi

g --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libb

luray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enab

le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --e

nable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable

-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 -

-enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enab

le-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --en

able-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --en

able-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --e

nable-dxva2 --enable-avisynth --enable-libopenmpt

  libavutil      56. 26.100 / 56. 26.100

  libavcodec     58. 47.105 / 58. 47.105

  libavformat    58. 26.101 / 58. 26.101

  libavdevice    58.  7.100 / 58.  7.100

  libavfilter     7. 48.100 /  7. 48.100

  libswscale      5.  4.100 /  5.  4.100

  libswresample   3.  4.100 /  3.  4.100

  libpostproc    55.  4.100 / 55.  4.100

ffmpeg.exe: Invalid data found when processing input

Anomalie #4328 : Depots inaccessibles

7 mai 2019, par Armen Spidermian
oui j’ai commencé par poser la question sur #spip
ou l’on m’a invite a ouvrir un ticket ^^

redmine@spip.org a écrit :
La demande #4328 <https://core.spip.net/issues/4328#change-14931> a
été mise à jour par b b.

Dans ce cas je t’invite à poser la question sur la liste spip-zone ou
passer sur http://irc.spip.net/ pour en discuter.

Anomalie #4328 : Depots inaccessibles
<https://core.spip.net/issues/4328#change-14931>
- Auteur : Armen Spidermian
- Statut : Fermé
- Priorité : Normal
- Assigné à :
- Catégorie :
- Version cible :
- Resolution : invalid
- Navigateur :
Spip refuse de se connecter au dépot.

2019-05-06 13:50:01 78.230.118.204 (pid 7481) :Pri:ERREUR : Erreur
connexion
2019-05-06 13:50:02 78.230.118.204 (pid 7481) :Pri:ERREUR : Erreur
connexion
2019-05-06 13:50:02 78.230.118.204 (pid 7481) :Pri : !INFO : copie_locale
: Echec recuperation https://plugins.spip.net/depots/principal.xml sur
../IMG/distant/xml/principalxml2fdc.xml status : 0

Je n’arrive pas a comprendre d’ou ca vient...

Fichiers ErreurSpip.png
<https://core.spip.net/attachments/download/1083/ErreurSpip.png> (84,9 ko)

Vous recevez ce mail car vous êtes impliqués sur ce projet.
Pour changer les préférences d’envoi de mail, allez sur
http://core.spip.net/my/account

How to correctly calculate which segments are ready to be downloaded using MPEG-DASH

24 avril 2019, par igal k

What i’m trying to do ?

Write a simple MPEG-DASH client using the SegmentTemplate pattern to calculate which segments are ready to be downloaded for a live source.

A picture taken using chrome’s debugging tools at a moment X showing an mpd request(8af651fd747.....mpd) and the actual segments fetched respectfully to that request.

Given the following MPD

<mpd availabilitystarttime="2019-04-24T06:43:32Z" maxsegmentduration="PT4.096S" minbuffertime="PT4.096S" minimumupdateperiod="PT15.835S" profiles="urn:mpeg:dash:profile:isoff-live:2011" publishtime="2019-04-24T11:14:01Z" suggestedpresentationdelay="PT11.878S" timeshiftbufferdepth="PT65.536S" type="dynamic" xmlns="urn:mpeg:dash:schema:mpd:2011">

  <location>https://content-aaps1.uplynk.com/channel/8af651fd7473474f86a05ffb0a1c8972.mpd?rmt=wv&amp;amp;cid=8af651fd7473474f86a05ffb0a1c8972&amp;amp;oid=600e5c27541344a1bf3818617ad712ce&amp;amp;prettydash=1&amp;amp;exp=1556091088&amp;amp;rn=4138683939&amp;amp;tc=1&amp;amp;ct=c&amp;amp;sig=5fb7f0c18f3f1d2ad4fdee53c02c1e1ed904bc5e8474f4ebf886d209ff7f21c9&amp;amp;pbs=05b6594bcf4b4728ac1094976a80194d</location>

  <period start="PT2826.240S">

    <adaptationset maxframerate="30" maxheight="720" maxwidth="1280" mimetype="video/mp4" segmentalignment="true" startwithsap="1">

      <representation bandwidth="2604473" codecs="avc1.64001e" framerate="30" height="360" scantype="progressive" width="640">

        <baseurl>https://x-default-stgec.uplynk.com/aapm/slices/8c1/600e5c27541344a1bf3818617ad712ce/8c1027496a964b049f1bd5895f8f0412/</baseurl>

        <segmenttemplate duration="368640" initialization="https://x-default-stgec.uplynk.com/aapm/slices/8c1/600e5c27541344a1bf3818617ad712ce/8c1027496a964b049f1bd5895f8f0412/$RepresentationID$_init.mp4?pbs=05b6594bcf4b4728ac1094976a80194d&amp;amp;_jt=l&amp;amp;chid=8af651fd7473474f86a05ffb0a1c8972" media="$RepresentationID$$Number%08d$.m4f?pbs=05b6594bcf4b4728ac1094976a80194d&amp;amp;_jt=l&amp;amp;chid=8af651fd7473474f86a05ffb0a1c8972" presentationtimeoffset="254361599" startnumber="690" timescale="90000"></segmenttemplate>

      </representation>

    </adaptationset>

  </period>

  <utctiming schemeiduri="urn:mpeg:dash:utc:http-iso:2014" value="https://content-aaps1.uplynk.com/misc/utcservertime"></utctiming>

</mpd>

I see that the next segment request should be #3955

What i have tried so far

    period.end = 1556104456;

    period.start = 2826;

    availability_start_time = 1556088212;

    max_segment_duration = 4;

    time_shift_buffer_depth = 65

So, first of all, i read DASH-IF-IOP 4.3 section 4.3.4.2 page #82 and implemented the following code :

   int k1 = 1;

int period_duration = period.end - (period.start + data_.availability_start_time);

int k2 = ceil((float)period_duration / (float)data_.max_segment_duration);

double duration = ((float)representation.duration / (float)representation.timeScale);

size_t live_edge = std::min(

    (int)floor((float)((data_.publish_time - data_.availability_start_time - period.start) / duration)), k2);



size_t oldest = std::max(k1, (int)floor((float)((data_.publish_time - data_.availability_start_time - period.start -

                                                    data_.time_shift_buffer_depth) /

                                                duration)));

after calculating everything : k1=1, k2=3355, live_edge=3272 and oldest=3256

Also tried using ffmpeg’s dashdec.c

for min_segment :

if (c->is_live &amp;&amp; pls->fragment_duration)

    {

        num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time) - c->time_shift_buffer_depth) * pls->fragment_timescale) / pls->fragment_duration;

    }

for max_segment :

num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time)) * pls->fragment_timescale) / pls->fragment_duration;

after a small modification :

size_t pmax = (((data_.publish_time - data_.availability_start_time))) / duration;

size_t pmin = ((data_.publish_time - data_.availability_start_time) - data_.time_shift_buffer_depth) / duration;

pmin=3946 pmax=3961

in the ffmpeg example, i had to manually remove the first_seq_no variable because it looked like i doubled added the SegmentTemplate@StartNumber.

even after succeeding in this task, how do i exactly build the request list of Segment(NOW) ----> Segment(LIVE_EDGE)

1 | ... | 1786 | 1787 | 1788 | 1789 | 1790 | 1791 | 1792 | 1793 | 1794 | ... | 1895

Recherche avancée

Médias (0)

Autres articles (37)

Contribute to documentation

Selection of projects using MediaSPIP

Use, discuss, criticize

Sur d’autres sites (5685)

batch i need to encode hole folder files

Anomalie #4328 : Depots inaccessibles

How to correctly calculate which segments are ready to be downloaded using MPEG-DASH

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