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    24 juin 2013, par

    Explications des différents changements notables lors du passage de la version 0.1 de MediaSPIP à la version 0.3. Quelles sont les nouveautés
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    5 septembre 2013, par

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    21 juin 2013, par

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Sur d’autres sites (6679)

  • Ream-time watermarking with MPEG-DASH

    14 juillet 2016, par Calvin W.

    In the system, I want to add a unique watermark (e.g. IP address of client and time stamp) into the video that he/she want to watch.

    But when I handled it with OpenCV, it spent 25 minute with a 15-min video. And I need to transcode to mp4 with ffmpeg.

    Now I’m trying the watermark function of ffmpeg, bit it still needs some time.

    It it possible to send the video to client side with MPEG-DASH while transcoding it with ffmpeg ?

    System spec :(Amazon EC2 c3.xlarge)
    Intel Xeon E5-2680 v2 (Ivy Bridge) - 4 vCPU
    7.5G RAM
    40GB SSD
    Ubuntu 14.04 LTS
    OpenCV2.4.13
    ffmpeg 3.1.1

    code :

    import cv2
    
import sys
    
import time
    
from datetime import datetime as dt
    

    
# frame of input video
    
fps = float(sys.argv[4])
    
# encode to AVC
    
fourcc = cv2.cv.CV_FOURCC('A', 'V', 'C', '1')
    
# transparency of text
    
alpha = 0.1
    
beta = 1 - alpha
    

    
# input video
    
cap = cv2.VideoCapture(sys.argv[3])
    

    
# current frame index, start from 0
    
frameIndex = 0
    

    
# get input video's width/height
    
width = int(cap.get(cv2.cv.CV_CAP_PROP_FRAME_WIDTH))
    
height = int(cap.get(cv2.cv.CV_CAP_PROP_FRAME_HEIGHT))
    

    
# config output (error using .mp4)
    
out = cv2.VideoWriter('output.avi', fourcc, fps, (width, height))
    

    
# access time
    
timeStr = dt.fromtimestamp(time.time()).strftime('%Y-%m-%d %H:%M:%S')
    

    
requestIP = sys.argv[1]
    
username = sys.argv[2]
    
text = "%s %s %s" % (requestIP, username, timeStr)
    

    

    
# start loading video
    
while(cap.isOpened()):
    
    ret, frame = cap.read()
    
    if ret:
    
        # add text between 10s - 20s
    
        if frameIndex > time10 and frameIndex < time20:
    
            # clone a new frame to add text
    
            overlay = frame.copy()
    
            cv2.putText(overlay, text, (100, 100), cv2.FONT_HERSHEY_PLAIN, 0.5, (255, 255, 255))
    
            # combine both frame and make text transparent
    
            cv2.addWeighted(overlay, alpha, frame, beta, 0, frame)
    
        # write frame to output
    
        out.write(frame)
    
        frameIndex += 1
    
    # wait for next frame
    
    if cap.get(cv2.cv.CV_CAP_PROP_POS_FRAMES) == cap.get(cv2.cv.CV_CAP_PROP_FRAME_COUNT):
    
        break
    
# End of video
    
# release
    
cap.release()
    
out.release()

  • Decrypting fragmented mpeg-dash using ffmpeg

    6 octobre 2022, par Sayem Prodhan Ananta

    I have an mpeg-dash which I want to decrypt. I have the CENC decryption key. But I am unable to get it working. The dash uses segment template. Here is the dash

    


    &lt;?xml version="1.0" ?>&#xA;<mpd mediapresentationduration="PT1H55M53.987S" minbuffertime="PT6.00S" profiles="urn:mpeg:dash:profile:isoff-live:2011" type="static" xmlns="urn:mpeg:dash:schema:mpd:2011">&#xA;  &#xA;  <period>&#xA;    &#xA;    <adaptationset maxheight="720" maxwidth="1280" mimetype="video/mp4" segmentalignment="true" startwithsap="1">&#xA;      <accessibility schemeiduri="urn:scte:dash:cc:cea-608:2015" value="eng"></accessibility>&#xA;      <viewpoint schemeiduri="urn:mpeg:dash:role:2011" value="vp2"></viewpoint>&#xA;      &#xA;      <contentprotection schemeiduri="urn:mpeg:dash:mp4protection:2011" value="cenc"></contentprotection>&#xA;      &#xA;      <contentprotection schemeiduri="urn:uuid:9a04f079-9840-4286-ab92-e65be0885f95">&#xA;        pAIAAAEAAQCaAjwAVwBSAE0ASABFAEEARABFAFIAIAB4AG0AbABuAHMAPQAiAGgAdAB0AHAAOgAvAC8AcwBjAGgAZQBtAGEAcwAuAG0AaQBjAHIAbwBzAG8AZgB0AC4AYwBvAG0ALwBEAFIATQAvADIAMAAwADcALwAwADMALwBQAGwAYQB5AFIAZQBhAGQAeQBIAGUAYQBkAGUAcgAiACAAdgBlAHIAcwBpAG8AbgA9ACIANAAuADAALgAwAC4AMAAiAD4APABEAEEAVABBAD4APABQAFIATwBUAEUAQwBUAEkATgBGAE8APgA8AEsARQBZAEwARQBOAD4AMQA2ADwALwBLAEUAWQBMAEUATgA&#x2B;ADwAQQBMAEcASQBEAD4AQQBFAFMAQwBUAFIAPAAvAEEATABHAEkARAA&#x2B;ADwALwBQAFIATwBUAEUAQwBUAEkATgBGAE8APgA8AEsASQBEAD4AOABoAFcAMwBQAEsAeABPAEkAYwB1AGsAVwBWAHgASwBaAHgAMgA3AEMAZwA9AD0APAAvAEsASQBEAD4APABDAEgARQBDAEsAUwBVAE0APgBBAGQARgAvAFEAcwBzAHEATQBhAEEAPQA8AC8AQwBIAEUAQwBLAFMAVQBNAD4APABMAEEAXwBVAFIATAA&#x2B;AGgAdAB0AHAAOgAvAC8AcAByAC4AcwBlAHIAdgBpAGMAZQAuAGUAeABwAHIAZQBzAHMAcABsAGEAeQAuAGMAbwBtAC8AcABsAGEAeQByAGUAYQBkAHkALwBSAGkAZwBoAHQAcwBNAGEAbgBhAGcAZQByAC4AYQBzAG0AeAA8AC8ATABBAF8AVQBSAEwAPgA8AC8ARABBAFQAQQA&#x2B;ADwALwBXAFIATQBIAEUAQQBEAEUAUgA&#x2B;AA==&#xA;      </contentprotection>&#xA;      &#xA;      <contentprotection schemeiduri="urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed">&#xA;        AAAAQ3Bzc2gAAAAA7e&#x2B;LqXnWSs6jyCfc1R0h7QAAACMIARIQPLcV8k6syyGkWVxKZx27ChoKaW50ZXJ0cnVzdCIBKg==&#xA;      </contentprotection>&#xA;      <segmenttemplate duration="6000" initialization="$RepresentationID$/init.mp4" media="$RepresentationID$/seg-$Number$.m4s" startnumber="1" timescale="1000"></segmenttemplate>&#xA;      <representation bandwidth="634478" codecs="avc1.4D401F" framerate="2997/100" height="288" scantype="progressive" width="512"></representation>&#xA;      <representation bandwidth="789637" codecs="avc1.4D401F" framerate="2997/100" height="360" scantype="progressive" width="640"></representation>&#xA;      <representation bandwidth="1562569" codecs="avc1.4D401F" framerate="2997/100" height="432" scantype="progressive" width="768"></representation>&#xA;      <representation bandwidth="2124583" codecs="avc1.4D401F" framerate="2997/100" height="720" scantype="progressive" width="1280"></representation>&#xA;    </adaptationset>&#xA;    &#xA;    <adaptationset lang="en" mimetype="audio/mp4" segmentalignment="true" startwithsap="1">&#xA;      &#xA;      <contentprotection schemeiduri="urn:mpeg:dash:mp4protection:2011" value="cenc"></contentprotection>&#xA;      &#xA;      <contentprotection schemeiduri="urn:uuid:9a04f079-9840-4286-ab92-e65be0885f95">&#xA;        pAIAAAEAAQCaAjwAVwBSAE0ASABFAEEARABFAFIAIAB4AG0AbABuAHMAPQAiAGgAdAB0AHAAOgAvAC8AcwBjAGgAZQBtAGEAcwAuAG0AaQBjAHIAbwBzAG8AZgB0AC4AYwBvAG0ALwBEAFIATQAvADIAMAAwADcALwAwADMALwBQAGwAYQB5AFIAZQBhAGQAeQBIAGUAYQBkAGUAcgAiACAAdgBlAHIAcwBpAG8AbgA9ACIANAAuADAALgAwAC4AMAAiAD4APABEAEEAVABBAD4APABQAFIATwBUAEUAQwBUAEkATgBGAE8APgA8AEsARQBZAEwARQBOAD4AMQA2ADwALwBLAEUAWQBMAEUATgA&#x2B;ADwAQQBMAEcASQBEAD4AQQBFAFMAQwBUAFIAPAAvAEEATABHAEkARAA&#x2B;ADwALwBQAFIATwBUAEUAQwBUAEkATgBGAE8APgA8AEsASQBEAD4AOABoAFcAMwBQAEsAeABPAEkAYwB1AGsAVwBWAHgASwBaAHgAMgA3AEMAZwA9AD0APAAvAEsASQBEAD4APABDAEgARQBDAEsAUwBVAE0APgBBAGQARgAvAFEAcwBzAHEATQBhAEEAPQA8AC8AQwBIAEUAQwBLAFMAVQBNAD4APABMAEEAXwBVAFIATAA&#x2B;AGgAdAB0AHAAOgAvAC8AcAByAC4AcwBlAHIAdgBpAGMAZQAuAGUAeABwAHIAZQBzAHMAcABsAGEAeQAuAGMAbwBtAC8AcABsAGEAeQByAGUAYQBkAHkALwBSAGkAZwBoAHQAcwBNAGEAbgBhAGcAZQByAC4AYQBzAG0AeAA8AC8ATABBAF8AVQBSAEwAPgA8AC8ARABBAFQAQQA&#x2B;ADwALwBXAFIATQBIAEUAQQBEAEUAUgA&#x2B;AA==&#xA;      </contentprotection>&#xA;      &#xA;      <contentprotection schemeiduri="urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed">&#xA;        AAAAQ3Bzc2gAAAAA7e&#x2B;LqXnWSs6jyCfc1R0h7QAAACMIARIQPLcV8k6syyGkWVxKZx27ChoKaW50ZXJ0cnVzdCIBKg==&#xA;      </contentprotection>&#xA;      <segmenttemplate duration="6000" initialization="$RepresentationID$/init.mp4" media="$RepresentationID$/seg-$Number$.m4s" startnumber="1" timescale="1000"></segmenttemplate>&#xA;      <representation audiosamplingrate="48000" bandwidth="136225" codecs="mp4a.40.2">&#xA;        <audiochannelconfiguration schemeiduri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"></audiochannelconfiguration>&#xA;      </representation>&#xA;    </adaptationset>&#xA;  </period>&#xA;</mpd>&#xA;

    &#xA;

    I have produced an mp4 file by combining all the segments like this

    &#xA;

    init.mp4&#x2B;seg-1.m4s&#x2B;seg-2.m4s&#x2B;....&#x2B;seg-1159.m4s&#xA;

    &#xA;

    But I end up with following error

    &#xA;

    ffmpeg version N-99631-g9018257751-anan5a-2020-10-19 Copyright (c) 2000-2020 the FFmpeg developers&#xA;  built with gcc 8 (Debian 8.3.0-6)&#xA;  configuration: --extra-version=anan5a-2020-10-19 --enable-gpl --enable-version3 --disable-shared --enable-static --enable-small --enable-avisynth --enable-chromaprint --enable-frei0r --enable-gmp --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-librtmp --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtesseract --enable-libtheora --enable-libtwolame --enable-libv4l2 --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libxml2 --enable-libzmq --enable-libzvbi --enable-lv2 --enable-openal --enable-opencl --enable-opengl --enable-libdrm --enable-nonfree --enable-libfdk-aac --enable-libbluray --enable-libzimg --enable-libsvtav1&#xA;  libavutil      56. 60.100 / 56. 60.100&#xA;  libavcodec     58.111.101 / 58.111.101&#xA;  libavformat    58. 62.100 / 58. 62.100&#xA;  libavdevice    58. 11.102 / 58. 11.102&#xA;  libavfilter     7. 87.100 /  7. 87.100&#xA;  libswscale      5.  8.100 /  5.  8.100&#xA;  libswresample   3.  8.100 /  3.  8.100&#xA;  libpostproc    55.  8.100 / 55.  8.100&#xA;[mov,mp4,m4a,3gp,3g2,mj2 @ 0x557789b49300] Incorrect number of samples in encryption info&#xA;[mov,mp4,m4a,3gp,3g2,mj2 @ 0x557789b49300] Could not find codec parameters for stream 0 (Video: h264 (avc1 / 0x31637661), none, 512x288, 616 kb/s): unspecified pixel format&#xA;Consider increasing the value for the &#x27;analyzeduration&#x27; (0) and &#x27;probesize&#x27; (5000000) options&#xA;Input #0, mov,mp4,m4a,3gp,3g2,mj2, from &#x27;../videos/enc.0a7bd4e9ec72b6e0-5549.mkv&#x27;:&#xA;  Metadata:&#xA;    major_brand     : isom&#xA;    minor_version   : 512&#xA;    compatible_brands: isomiso2avc1mp41iso5iso6&#xA;  Duration: 01:55:47.95, bitrate: 625 kb/s&#xA;    Stream #0:0(eng): Video: h264 (avc1 / 0x31637661), none, 512x288, 616 kb/s, SAR 1:1 DAR 16:9, 29.97 fps, 11988 tbr, 11988 tbn, 23976 tbc (default)&#xA;    Metadata:&#xA;      handler_name    : Bento4 Video Handler&#xA;    Side data:&#xA;      unknown side data type 24 (779 bytes)&#xA;Output #0, matroska, to &#x27;../videos/dec.0a7bd4e9ec72b6e0-5549.mkv&#x27;:&#xA;  Metadata:&#xA;    major_brand     : isom&#xA;    minor_version   : 512&#xA;    compatible_brands: isomiso2avc1mp41iso5iso6&#xA;    encoder         : Lavf58.62.100&#xA;    Stream #0:0(eng): Video: h264 (avc1 / 0x31637661), none, 512x288 [SAR 1:1 DAR 16:9], q=2-31, 616 kb/s, 29.97 fps, 11988 tbr, 1k tbn, 11988 tbc (default)&#xA;    Metadata:&#xA;      handler_name    : Bento4 Video Handler&#xA;    Side data:&#xA;      unknown side data type 24 (779 bytes)&#xA;Stream mapping:&#xA;  Stream #0:0 -> #0:0 (copy)&#xA;Press [q] to stop, [?] for help&#xA;[mov,mp4,m4a,3gp,3g2,mj2 @ 0x557789b49300] Incorrect number of samples in encryption info&#xA;../videos/enc.0a7bd4e9ec72b6e0-5549.mkv: Invalid data found when processing input&#xA;frame=    0 fps=0.0 q=-1.0 Lsize=       1kB time=00:00:00.00 bitrate=N/A speed=   0x    &#xA;video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown&#xA;

    &#xA;

    How can I achieve the decryption without error ??

    &#xA;

  • avformat/dashdec : add dash demuxer base version

    9 septembre 2017, par Steven Liu
    avformat/dashdec : add dash demuxer base version

    ffmpeg need a dash demuxer for demux the dash formats base on
    
https://github.com/samsamsam-iptvplayer/exteplayer3/blob/master/tmp/ffmpeg/patches/3.2.2/000001_add_dash_demux.patch
    

    TODO :
    
1. support multi bitrate dash.
    

    v2 fixed :
    
1. from autodetect to disabled
    
2. from camelCase code style to ffmpeg code style
    
3. from RepType to AVMediaType
    
4. fix variable typo
    
5. change time value from uint32_t to uint64_t
    
6. removed be used once API
    
7. change 'time(NULL)`, except it is not 2038-safe.' to av_gettime and av_timegm
    
8. merge complex free operation to free_fragment
    
9. use API from snprintf to av_asprintf
    

    v3 fixed :
    
1. fix typo from —enabled-xml2 to —enable-xml2
    

    v4 fixed :
    
1. from —enable-xml2 to —enable-libxml2
    
2. move system includes to top
    
3. remove nouse includes
    
4. rename enum name
    
5. add a trailing comma for the last entry enum
    
6. fix comment typo
    
7. add const to DASHContext class front
    
8. check sscanf if return arguments and give warning message when error
    
9. check validity before free seg->url and seg
    
10. check if the val is null, before use atoll
    

    v5 fixed :
    
1. fix typo from mainifest to manifest
    

    v6 fixed :
    
1. from realloc to av_realloc
    
2. from free to av_free
    

    v7 fixed :
    
1. remove the -lxml2 from configure when require_pkg_config
    

    v8 fixed :
    
1. fix replace filename template by av_asprintf secure problem
    

    v9 modified :
    
1. make manifest parser clearly
    

    v10 fixed :
    
1. fix function API name code style
    
2. remove redundant strreplace call
    
3. remove redundant memory operation and check return value from get_content_url()
    
4. add space between ) and 
    
5. remove no need to log the value for print
    

    v11 fixed :
    
1. from atoll to strtoll
    
Suggested-by : Michael Niedermayer <michael@niedermayer.cc>
    

    v12 fixed :
    
1. remove strreplace and instead by av_strreplace
    
Suggested-by : Nicolas George <george@nsup.org>
    

    v13 fixed :
    
1. fix bug : cannot play :
    
http://dash.edgesuite.net/akamai/bbb_30fps/bbb_30fps.mpd
    
Reported-by : Andy Furniss <adf.lists@gmail.com>
    

    v14 fixed :
    
1. fix bug : TLS connection was non-properly terminated
    
2. fix bug : No trailing CRLF found in HTTP header
    
Reported-by : Andy Furniss <adf.lists@gmail.com>
    

    v15 fixed :
    
1. play youtube link : ffmpeg -i $(youtube-dl -J "https://www.youtube.com/watch?v=XmL19DOP_Ls" ; | jq -r ".requested_formats[0].manifest_url")
    
2. code refine for timeline living stream
    
Reported-by : Ricardo Constantino <wiiaboo@gmail.com>
    

    v16 fixed :
    
1. remove the snprintf and instead by get_segment_filename make safety
    
2. remove unnecessary loops
    
3. updated xmlStrcmp and xmlFree to av_* functions
    
4. merge code repeat into one function
    
5. add memory alloc faild check
    
6. update update_init_section and open_url
    
7. output safety error message when filename template not safe
    
Suggested-by : wm4 <nfxjfg@googlemail.com>
    

    v17 fixed :
    
1. add memory alloc faild check
    
2. fix resource space error at free_representation
    

    v18 fixed :
    
1. add condition of template format
    

    v19 fixed :
    
1. fix typo of the option describe
    

    v20 fixed :
    
1. add the c->base_url alloc check
    
2. make the DASHTmplId same to dashenc
    

    v21 fixed :
    
1. remove get_repl_pattern_and_format and get_segment_filename
    
2. process use dashcomm APIs
    

    v22 fixed :
    
1. modify the include "dashcomm.h" to include "dash.h"
    
2. use internal API from dash_fill_tmpl_params to ff_dash_fill_tmpl_params
    

    Signed-off-by : Steven Liu <lq@onvideo.cn>
    
Signed-off-by : samsamsam <samsamsam@o2.pl>
    • [DH] configure
    • [DH] libavformat/Makefile
    • [DH] libavformat/allformats.c
    • [DH] libavformat/dashdec.c

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