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  • (Dés)Activation de fonctionnalités (plugins)

    18 février 2011, par

    Pour gérer l’ajout et la suppression de fonctionnalités supplémentaires (ou plugins), MediaSPIP utilise à partir de la version 0.2 SVP.
    SVP permet l’activation facile de plugins depuis l’espace de configuration de MediaSPIP.
    Pour y accéder, il suffit de se rendre dans l’espace de configuration puis de se rendre sur la page "Gestion des plugins".
    MediaSPIP est fourni par défaut avec l’ensemble des plugins dits "compatibles", ils ont été testés et intégrés afin de fonctionner parfaitement avec chaque (...)

  • Soumettre bugs et patchs

    10 avril 2011

    Un logiciel n’est malheureusement jamais parfait...
    Si vous pensez avoir mis la main sur un bug, reportez le dans notre système de tickets en prenant bien soin de nous remonter certaines informations pertinentes : le type de navigateur et sa version exacte avec lequel vous avez l’anomalie ; une explication la plus précise possible du problème rencontré ; si possibles les étapes pour reproduire le problème ; un lien vers le site / la page en question ;
    Si vous pensez avoir résolu vous même le bug (...)

  • Installation en mode standalone

    4 février 2011, par

    L’installation de la distribution MediaSPIP se fait en plusieurs étapes : la récupération des fichiers nécessaires. À ce moment là deux méthodes sont possibles : en installant l’archive ZIP contenant l’ensemble de la distribution ; via SVN en récupérant les sources de chaque modules séparément ; la préconfiguration ; l’installation définitive ;
    [mediaspip_zip]Installation de l’archive ZIP de MediaSPIP
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Sur d’autres sites (8262)

  • FFmpeg Time Skipping after concat

    18 septembre 2017, par Manul Hüttinger

    i am trying to concatenate videos and in my resulting Videos i have the issue that at the concat edges my video is skipping/glitching.

    General Workflow

    in general my workflow looks like this

    1. Stream via ffmpeg
    2. capture stream and segment all 2 mins in to TS files
    3. concat TS file to MP4 video
    4. cut MP4 video at the desired Timestamps

    Detailed Look at Step 4

    as i am handling 2-hours+ videos i don’t want to re-encode the whole video. So i am looking for the closest I Frames to my In and Outpoint and cut 1 Frame before/after. As my result i get 3 Videos (front/middle/back). Now it is only needed to re-encode front and back and concat all three Videos.
    So far the theory

    General Observations

    As i look at my resulting video, i obeservated the following.
    frontpart duration is e.g. 3.2 secs. i skip framewise through the Video and get nice and clean timestamps ( 00:00:02.620, 00:00:02:660 )
    As soon as i get to my cutting edge the timestamps are skipping some frames and changing (00:00:03.200, 00:00:03.408 ,00:00:03.409). When i look only at the single frame images, their are no missing/dropped frames

    when i concat my TS files, the results contains a messed up frame rate e.g from constant 25 F/s to 25.0096 F/s

    FFMPEG instructions

    FRONT Video

    ffmpeg -ss 232.52 -i src.mp4 -t 3.24 -filter_complex "setpts=PTS-STARTPTS" -vcodec libx264 -profile:v baseline -level 31 -bf 0  -f mp4 -y front.mp4
    
ffmpeg version n3.3 Copyright (c) 2000-2017 the FFmpeg developers
    
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
    
  configuration: --prefix=/usr --extra-cflags=-I/usr/include --extra-ldflags=-L/usr/lib --bindir=/usr/local/bin --extra-libs=-ldl --enable-gpl --enable-libass --enable-libfdk-aac --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-libssh --enable-openssl
    
  libavutil      55. 58.100 / 55. 58.100
    
  libavcodec     57. 89.100 / 57. 89.100
    
  libavformat    57. 71.100 / 57. 71.100
    
  libavdevice    57.  6.100 / 57.  6.100
    
  libavfilter     6. 82.100 /  6. 82.100
    
  libswscale      4.  6.100 /  4.  6.100
    
  libswresample   2.  7.100 /  2.  7.100
    
  libpostproc    54.  5.100 / 54.  5.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'src.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf55.33.100
    
  Duration: 01:06:00.33, start: 0.000000, bitrate: 610 kb/s
    
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x464 [SAR 1:1 DAR 80:29], 537 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 65 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
Stream mapping:
    
  Stream #0:0 (h264) -> setpts (graph 0)
    
  setpts (graph 0) -> Stream #0:0 (libx264)
    
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
    
Press [q] to stop, [?] for help
    
[libx264 @ 0x31ea160] using SAR=1/1
    
[libx264 @ 0x31ea160] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX LZCNT
    
[libx264 @ 0x31ea160] profile Constrained Baseline, level 3.1
    
[libx264 @ 0x31ea160] 264 - core 148 - H.264/MPEG-4 AVC codec - Copyleft 2003-2016 - http://www.videolan.org/x264.html - options: cabac=0 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 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=0 weightp=0 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 'front.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf57.71.100
    
    Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 1280x464 [SAR 1:1 DAR 80:29], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
    
    Metadata:
    
      encoder         : Lavc57.89.100 libx264
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    
    Stream #0:1(und): Audio: aac (LC) ([64][0][0][0] / 0x0040), 44100 Hz, mono, fltp, 69 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
      encoder         : Lavc57.89.100 aac
    
frame=   81 fps= 31 q=-1.0 Lsize=     151kB time=00:00:03.25 bitrate= 379.5kbits/s speed=1.23x
    
video:119kB audio:28kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.531915%
    
[libx264 @ 0x31ea160] frame I:1     Avg QP:17.43  size: 38268
    
[libx264 @ 0x31ea160] frame P:80    Avg QP:21.05  size:  1038
    
[libx264 @ 0x31ea160] mb I  I16..4: 71.4%  0.0% 28.6%
    
[libx264 @ 0x31ea160] mb P  I16..4:  0.2%  0.0%  0.0%  P16..4:  7.8%  1.8%  0.6%  0.0%  0.0%    skip:89.6%
    
[libx264 @ 0x31ea160] coded y,uvDC,uvAC intra: 21.8% 40.8% 23.1% inter: 1.6% 4.2% 0.2%
    
[libx264 @ 0x31ea160] i16 v,h,dc,p: 66% 25%  5%  4%
    
[libx264 @ 0x31ea160] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 30% 28% 15%  4%  4%  5%  4%  5%  4%
    
[libx264 @ 0x31ea160] i8c dc,h,v,p: 51% 24% 21%  4%
    
[libx264 @ 0x31ea160] ref P L0: 74.3% 15.2% 10.5%
    
[libx264 @ 0x31ea160] kb/s:299.56
    
[aac @ 0x31edfa0] Qavg: 123.323

    MIDDLE Video

    ffmpeg -ss 235.88 -i src.mp4 -c copy -t 1492.96 -f mp4 -y middle.mp4 
    
ffmpeg version n3.3 Copyright (c) 2000-2017 the FFmpeg developers
    
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
    
  configuration: --prefix=/usr --extra-cflags=-I/usr/include --extra-ldflags=-L/usr/lib --bindir=/usr/local/bin --extra-libs=-ldl --enable-gpl --enable-libass --enable-libfdk-aac --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-libssh --enable-openssl
    
  libavutil      55. 58.100 / 55. 58.100
    
  libavcodec     57. 89.100 / 57. 89.100
    
  libavformat    57. 71.100 / 57. 71.100
    
  libavdevice    57.  6.100 / 57.  6.100
    
  libavfilter     6. 82.100 /  6. 82.100
    
  libswscale      4.  6.100 /  4.  6.100
    
  libswresample   2.  7.100 /  2.  7.100
    
  libpostproc    54.  5.100 / 54.  5.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'src.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf55.33.100
    
  Duration: 01:06:00.33, start: 0.000000, bitrate: 610 kb/s
    
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x464 [SAR 1:1 DAR 80:29], 537 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 65 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
Output #0, mp4, to 'middle.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf57.71.100
    
    Stream #0:0(und): Video: h264 (Main) ([33][0][0][0] / 0x0021), yuv420p, 1280x464 [SAR 1:1 DAR 80:29], q=2-31, 537 kb/s, 25 fps, 25 tbr, 90k tbn, 90k tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(und): Audio: aac (LC) ([64][0][0][0] / 0x0040), 44100 Hz, mono, fltp, 65 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)
    
  Stream #0:1 -> #0:1 (copy)
    
Press [q] to stop, [?] for help
    
frame=37329 fps=16333 q=-1.0 Lsize=  113774kB time=00:24:52.95 bitrate= 624.3kbits/s speed= 653x
    
video:100359kB audio:12095kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.173957%

    BACK Video

    ffmpeg -ss 1728.88 -i 'src.mp4' -t 3.9199999999998 -filter_complex "setpts=PTS-STARTPTS" -vcodec libx264 -profile:v baseline -level 31 -bf 0  -f mp4 -y back.mp4
    
ffmpeg version n3.3 Copyright (c) 2000-2017 the FFmpeg developers
    
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
    
  configuration: --prefix=/usr --extra-cflags=-I/usr/include --extra-ldflags=-L/usr/lib --bindir=/usr/local/bin --extra-libs=-ldl --enable-gpl --enable-libass --enable-libfdk-aac --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-libssh --enable-openssl
    
  libavutil      55. 58.100 / 55. 58.100
    
  libavcodec     57. 89.100 / 57. 89.100
    
  libavformat    57. 71.100 / 57. 71.100
    
  libavdevice    57.  6.100 / 57.  6.100
    
  libavfilter     6. 82.100 /  6. 82.100
    
  libswscale      4.  6.100 /  4.  6.100
    
  libswresample   2.  7.100 /  2.  7.100
    
  libpostproc    54.  5.100 / 54.  5.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'src.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf55.33.100
    
  Duration: 01:06:00.33, start: 0.000000, bitrate: 610 kb/s
    
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x464 [SAR 1:1 DAR 80:29], 537 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 65 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
Stream mapping:
    
  Stream #0:0 (h264) -> setpts (graph 0)
    
  setpts (graph 0) -> Stream #0:0 (libx264)
    
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
    
Press [q] to stop, [?] for help
    
[libx264 @ 0x2672160] using SAR=1/1
    
[libx264 @ 0x2672160] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX LZCNT
    
[libx264 @ 0x2672160] profile Constrained Baseline, level 3.1
    
[libx264 @ 0x2672160] 264 - core 148 - H.264/MPEG-4 AVC codec - Copyleft 2003-2016 - http://www.videolan.org/x264.html - options: cabac=0 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 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=0 weightp=0 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 'back.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf57.71.100
    
    Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 1280x464 [SAR 1:1 DAR 80:29], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
    
    Metadata:
    
      encoder         : Lavc57.89.100 libx264
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    
    Stream #0:1(und): Audio: aac (LC) ([64][0][0][0] / 0x0040), 44100 Hz, mono, fltp, 69 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
      encoder         : Lavc57.89.100 aac
    
frame=   98 fps= 27 q=-1.0 Lsize=     268kB time=00:00:03.92 bitrate= 559.2kbits/s speed=1.07x
    
video:230kB audio:33kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.538479%
    
[libx264 @ 0x2672160] frame I:1     Avg QP:19.57  size:112129
    
[libx264 @ 0x2672160] frame P:97    Avg QP:21.68  size:  1270
    
[libx264 @ 0x2672160] mb I  I16..4: 35.4%  0.0% 64.6%
    
[libx264 @ 0x2672160] mb P  I16..4:  0.2%  0.0%  0.1%  P16..4:  6.9%  2.0%  0.8%  0.0%  0.0%    skip:90.1%
    
[libx264 @ 0x2672160] coded y,uvDC,uvAC intra: 54.4% 69.1% 54.2% inter: 2.0% 3.6% 0.3%
    
[libx264 @ 0x2672160] i16 v,h,dc,p: 63% 23%  8%  6%
    
[libx264 @ 0x2672160] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 26% 17% 11%  6%  8%  9%  7%  8%  8%
    
[libx264 @ 0x2672160] i8c dc,h,v,p: 50% 18% 24%  7%
    
[libx264 @ 0x2672160] ref P L0: 81.8% 11.5%  6.7%
    
[libx264 @ 0x2672160] kb/s:480.15
    
[aac @ 0x2675fa0] Qavg: 119.994

    CONCAT Videos

    ffmpeg -f concat -safe 0 -i concat.txt -c copy -r 25 -y /concat.mp4 
    
ffmpeg version n3.3 Copyright (c) 2000-2017 the FFmpeg developers
    
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
    
  configuration: --prefix=/usr --extra-cflags=-I/usr/include --extra-ldflags=-L/usr/lib --bindir=/usr/local/bin --extra-libs=-ldl --enable-gpl --enable-libass --enable-libfdk-aac --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-libssh --enable-openssl
    
  libavutil      55. 58.100 / 55. 58.100
    
  libavcodec     57. 89.100 / 57. 89.100
    
  libavformat    57. 71.100 / 57. 71.100
    
  libavdevice    57.  6.100 / 57.  6.100
    
  libavfilter     6. 82.100 /  6. 82.100
    
  libswscale      4.  6.100 /  4.  6.100
    
  libswresample   2.  7.100 /  2.  7.100
    
  libpostproc    54.  5.100 / 54.  5.100
    
Input #0, concat, from 'concat.txt':
    
  Duration: N/A, start: 0.000000, bitrate: N/A
    
    Stream #0:0: Video: h264 (Constrained Baseline) ([27][0][0][0] / 0x001B), yuv420p(progressive), 1280x464 [SAR 1:1 DAR 80:29], 25 fps, 25 tbr, 90k tbn, 50 tbc
    
    Stream #0:1(und): Audio: aac (LC) ([15][0][0][0] / 0x000F), 44100 Hz, mono, fltp, 74 kb/s
    
Output #0, mp4, to 'concat.mp4':
    
  Metadata:
    
    encoder         : Lavf57.71.100
    
    Stream #0:0: Video: h264 (Constrained Baseline) ([33][0][0][0] / 0x0021), yuv420p(progressive), 1280x464 [SAR 1:1 DAR 80:29], q=2-31, 25 fps, 25 tbr, 12800 tbn, 25 tbc
    
    Stream #0:1(und): Audio: aac (LC) ([64][0][0][0] / 0x0040), 44100 Hz, mono, fltp, 74 kb/s
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)
    
  Stream #0:1 -> #0:1 (copy)
    
Press [q] to stop, [?] for help
    
frame=37508 fps=7256 q=-1.0 Lsize=  114285kB time=00:25:00.59 bitrate= 623.9kbits/s speed= 290x
    
video:100672kB audio:12598kB subtitle:0kB other streams:0kB global headers:1kB muxing overhead: 0.896435%

    thank you very much.
    If needed i can provide samples

    Manu

  • Using ffserver to stream older IP cam MJPEG to RTSP

    26 mai 2016, par tmar89

    I have an older Sony IP camera that has an MJPEG stream. I need to connect this to an NVR that only takes ONVIP or RTSP and I’m trying to use ffserver and ffmpeg to convert the MJPEG stream to RTSP but it’s not working. Any have some idea of what I may be doing wrong ? Saw an error in the attempted playback about an unsupported Protocol.
    Here is my ffserver config :

    Port 8090
    
RTSPPort 5544
    
BindAddress 0.0.0.0
    
RTSPBindAddress 0.0.0.0
    
MaxClients 100
    
MaxBandwidth 10000
    

    
<feed>
    
File /tmp/feed27.ffm
    
FileMaxSize 5M
    
ACL allow 127.0.0.1
    
</feed>
    

    
<stream>
    
Format rtp
    
Feed feed27.ffm
    
NoAudio
    
VideoCodec mjpeg
    
VideoFrameRate 30
    
VideoSize 736x480
    
</stream>

    And here is the ffmpeg command I am using :

    [tm@tele ffserver-rtsp]# ffmpeg -f mjpeg -r 30 -s 736x480 -i http://[CAMIP]/image http://localhost:8090/feed27.ffm
    
    FFmpeg version 0.6.5, Copyright (c) 2000-2010 the FFmpeg developers
    
      built on Jan 29 2012 17:52:15 with gcc 4.4.5 20110214 (Red Hat 4.4.5-6)
    
      configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/share/man --incdir=/usr/include --disable-avisynth --extra-cflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -fPIC' --enable-avfilter --enable-avfilter-lavf --enable-libdc1394 --enable-libdirac --enable-libfaac --enable-libfaad --enable-libfaadbin --enable-libgsm --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libx264 --enable-gpl --enable-nonfree --enable-postproc --enable-pthreads --enable-shared --enable-swscale --enable-vdpau --enable-version3 --enable-x11grab
    
      libavutil     50.15. 1 / 50.15. 1
    
      libavcodec    52.72. 2 / 52.72. 2
    
      libavformat   52.64. 2 / 52.64. 2
    
      libavdevice   52. 2. 0 / 52. 2. 0
    
      libavfilter    1.19. 0 /  1.19. 0
    
      libswscale     0.11. 0 /  0.11. 0
    
      libpostproc   51. 2. 0 / 51. 2. 0
    
    [mjpeg @ 0x1ece670]Estimating duration from bitrate, this may be inaccurate
    
    Input #0, mjpeg, from 'http://[CAMIP]/image':
    
      Duration: N/A, bitrate: N/A
    
        Stream #0.0: Video: mjpeg, yuvj422p, 736x480, 30 fps, 30 tbr, 1200k tbn, 30 tbc
    
    Output #0, ffm, to 'http://localhost:8090/feed27.ffm':
    
      Metadata:
    
        encoder         : Lavf52.64.2
    
        Stream #0.0: Video: mjpeg, yuvj420p, 736x480, q=2-31, 200 kb/s, 1000k tbn, 30 tbc
    
    Stream mapping:
    
      Stream #0.0 -> #0.0
    
    Press [q] to stop encoding
    
    [mjpeg @ 0x222d110]rc buffer underflow
    
    frame=  640 fps= 17 q=31.4 size=   12884kB time=21.33 bitrate=4947.5kbits/s

    When I use VLC to open the stream, it cannot be found :

    Your input can't be opened:
    
    VLC is unable to open the MRL 'rtsp://localhost:5544/stream27.mpg'. Check the log for details.

    Finally, using ffplay on the same machine :

    [tm@tele tmp]# ffplay rtsp://localhost:5544/stream27.sdp
    
FFplay version 0.6.5, Copyright (c) 2003-2010 the FFmpeg developers
    
  built on Jan 29 2012 17:52:15 with gcc 4.4.5 20110214 (Red Hat 4.4.5-6)
    
  configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/share/man --incdir=/usr/include --disable-avisynth --extra-cflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -fPIC' --enable-avfilter --enable-avfilter-lavf --enable-libdc1394 --enable-libdirac --enable-libfaac --enable-libfaad --enable-libfaadbin --enable-libgsm --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libx264 --enable-gpl --enable-nonfree --enable-postproc --enable-pthreads --enable-shared --enable-swscale --enable-vdpau --enable-version3 --enable-x11grab
    
  libavutil     50.15. 1 / 50.15. 1
    
  libavcodec    52.72. 2 / 52.72. 2
    
  libavformat   52.64. 2 / 52.64. 2
    
  libavdevice   52. 2. 0 / 52. 2. 0
    
  libavfilter    1.19. 0 /  1.19. 0
    
  libswscale     0.11. 0 /  0.11. 0
    
  libpostproc   51. 2. 0 / 51. 2. 0
    
ALSA lib pulse.c:229:(pulse_connect) PulseAudio: Unable to connect: Connection refused
    

    
rtsp://localhost:5544/stream27.sdp: Protocol not supported

    And here was the log from ffserver :

    127.0.0.1:5000 - - "PLAY stream27.mpg/streamid=0 RTP/UDP"
    
[rtp @ 0x721dc0]Unsupported codec 8
    
127.0.0.1:0 - - "PLAY stream27.mpg/streamid=0 RTP/TCP"
    
[rtp @ 0x728cb0]Unsupported codec 8
    
127.0.0.1 - - [SETUP] "rtsp://localhost:5544/stream27.mpg/streamid=0 RTSP/1.0" 200 641

  • FFmpeg skipping time after concat

    19 septembre 2017, par Manul Hüttinger

    I am trying to concatenate videos and in my resulting Videos I have the issue that at the concat edges my video is skipping/glitching.

    General Workflow

    in general my workflow looks like this

    1. Stream via ffmpeg
    2. capture stream and segment all 2 mins in to TS files
    3. concat TS file to MP4 video
    4. cut MP4 video at the desired Timestamps

    Detailed Look at Step 4

    as I am handling 2-hours+ videos I don’t want to re-encode the whole video. So I am looking for the closest I Frames to my In and Outpoint and cut 1 Frame before/after. As my result I get 3 Videos (front/middle/back). Now it is only needed to re-encode front and back and concat all three Videos.
    So far the theory

    General Observations

    As I look at my resulting video, I obeservated the following.
    frontpart duration is e.g. 3.2 secs. I skip framewise through the Video and get nice and clean timestamps ( 00:00:02.620, 00:00:02:660 )
    As soon as I get to my cutting edge the timestamps are skipping some frames and changing (00:00:03.200, 00:00:03.408 ,00:00:03.409). When I look only at the single frame images, their are no missing/dropped frames

    when I concat my TS files, the results contains a messed up frame rate e.g from constant 25 F/s to 25.0096 F/s

    FFMPEG instructions

    FRONT Video

    ffmpeg -ss 232.52 -i src.mp4 -t 3.24 -filter_complex "setpts=PTS-STARTPTS" -vcodec libx264 -profile:v baseline -level 31 -bf 0  -f mp4 -y front.mp4
    
ffmpeg version n3.3 Copyright (c) 2000-2017 the FFmpeg developers
    
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
    
  configuration: --prefix=/usr --extra-cflags=-I/usr/include --extra-ldflags=-L/usr/lib --bindir=/usr/local/bin --extra-libs=-ldl --enable-gpl --enable-libass --enable-libfdk-aac --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-libssh --enable-openssl
    
  libavutil      55. 58.100 / 55. 58.100
    
  libavcodec     57. 89.100 / 57. 89.100
    
  libavformat    57. 71.100 / 57. 71.100
    
  libavdevice    57.  6.100 / 57.  6.100
    
  libavfilter     6. 82.100 /  6. 82.100
    
  libswscale      4.  6.100 /  4.  6.100
    
  libswresample   2.  7.100 /  2.  7.100
    
  libpostproc    54.  5.100 / 54.  5.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'src.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf55.33.100
    
  Duration: 01:06:00.33, start: 0.000000, bitrate: 610 kb/s
    
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x464 [SAR 1:1 DAR 80:29], 537 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 65 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
Stream mapping:
    
  Stream #0:0 (h264) -> setpts (graph 0)
    
  setpts (graph 0) -> Stream #0:0 (libx264)
    
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
    
Press [q] to stop, [?] for help
    
[libx264 @ 0x31ea160] using SAR=1/1
    
[libx264 @ 0x31ea160] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX LZCNT
    
[libx264 @ 0x31ea160] profile Constrained Baseline, level 3.1
    
[libx264 @ 0x31ea160] 264 - core 148 - H.264/MPEG-4 AVC codec - Copyleft 2003-2016 - http://www.videolan.org/x264.html - options: cabac=0 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 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=0 weightp=0 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 'front.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf57.71.100
    
    Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 1280x464 [SAR 1:1 DAR 80:29], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
    
    Metadata:
    
      encoder         : Lavc57.89.100 libx264
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    
    Stream #0:1(und): Audio: aac (LC) ([64][0][0][0] / 0x0040), 44100 Hz, mono, fltp, 69 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
      encoder         : Lavc57.89.100 aac
    
frame=   81 fps= 31 q=-1.0 Lsize=     151kB time=00:00:03.25 bitrate= 379.5kbits/s speed=1.23x
    
video:119kB audio:28kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.531915%
    
[libx264 @ 0x31ea160] frame I:1     Avg QP:17.43  size: 38268
    
[libx264 @ 0x31ea160] frame P:80    Avg QP:21.05  size:  1038
    
[libx264 @ 0x31ea160] mb I  I16..4: 71.4%  0.0% 28.6%
    
[libx264 @ 0x31ea160] mb P  I16..4:  0.2%  0.0%  0.0%  P16..4:  7.8%  1.8%  0.6%  0.0%  0.0%    skip:89.6%
    
[libx264 @ 0x31ea160] coded y,uvDC,uvAC intra: 21.8% 40.8% 23.1% inter: 1.6% 4.2% 0.2%
    
[libx264 @ 0x31ea160] i16 v,h,dc,p: 66% 25%  5%  4%
    
[libx264 @ 0x31ea160] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 30% 28% 15%  4%  4%  5%  4%  5%  4%
    
[libx264 @ 0x31ea160] i8c dc,h,v,p: 51% 24% 21%  4%
    
[libx264 @ 0x31ea160] ref P L0: 74.3% 15.2% 10.5%
    
[libx264 @ 0x31ea160] kb/s:299.56
    
[aac @ 0x31edfa0] Qavg: 123.323

    MIDDLE Video

    ffmpeg -ss 235.88 -i src.mp4 -c copy -t 1492.96 -f mp4 -y middle.mp4 
    
ffmpeg version n3.3 Copyright (c) 2000-2017 the FFmpeg developers
    
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
    
  configuration: --prefix=/usr --extra-cflags=-I/usr/include --extra-ldflags=-L/usr/lib --bindir=/usr/local/bin --extra-libs=-ldl --enable-gpl --enable-libass --enable-libfdk-aac --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-libssh --enable-openssl
    
  libavutil      55. 58.100 / 55. 58.100
    
  libavcodec     57. 89.100 / 57. 89.100
    
  libavformat    57. 71.100 / 57. 71.100
    
  libavdevice    57.  6.100 / 57.  6.100
    
  libavfilter     6. 82.100 /  6. 82.100
    
  libswscale      4.  6.100 /  4.  6.100
    
  libswresample   2.  7.100 /  2.  7.100
    
  libpostproc    54.  5.100 / 54.  5.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'src.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf55.33.100
    
  Duration: 01:06:00.33, start: 0.000000, bitrate: 610 kb/s
    
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x464 [SAR 1:1 DAR 80:29], 537 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 65 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
Output #0, mp4, to 'middle.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf57.71.100
    
    Stream #0:0(und): Video: h264 (Main) ([33][0][0][0] / 0x0021), yuv420p, 1280x464 [SAR 1:1 DAR 80:29], q=2-31, 537 kb/s, 25 fps, 25 tbr, 90k tbn, 90k tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(und): Audio: aac (LC) ([64][0][0][0] / 0x0040), 44100 Hz, mono, fltp, 65 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)
    
  Stream #0:1 -> #0:1 (copy)
    
Press [q] to stop, [?] for help
    
frame=37329 fps=16333 q=-1.0 Lsize=  113774kB time=00:24:52.95 bitrate= 624.3kbits/s speed= 653x
    
video:100359kB audio:12095kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.173957%

    BACK Video

    ffmpeg -ss 1728.88 -i 'src.mp4' -t 3.9199999999998 -filter_complex "setpts=PTS-STARTPTS" -vcodec libx264 -profile:v baseline -level 31 -bf 0  -f mp4 -y back.mp4
    
ffmpeg version n3.3 Copyright (c) 2000-2017 the FFmpeg developers
    
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
    
  configuration: --prefix=/usr --extra-cflags=-I/usr/include --extra-ldflags=-L/usr/lib --bindir=/usr/local/bin --extra-libs=-ldl --enable-gpl --enable-libass --enable-libfdk-aac --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-libssh --enable-openssl
    
  libavutil      55. 58.100 / 55. 58.100
    
  libavcodec     57. 89.100 / 57. 89.100
    
  libavformat    57. 71.100 / 57. 71.100
    
  libavdevice    57.  6.100 / 57.  6.100
    
  libavfilter     6. 82.100 /  6. 82.100
    
  libswscale      4.  6.100 /  4.  6.100
    
  libswresample   2.  7.100 /  2.  7.100
    
  libpostproc    54.  5.100 / 54.  5.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'src.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf55.33.100
    
  Duration: 01:06:00.33, start: 0.000000, bitrate: 610 kb/s
    
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x464 [SAR 1:1 DAR 80:29], 537 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 65 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
Stream mapping:
    
  Stream #0:0 (h264) -> setpts (graph 0)
    
  setpts (graph 0) -> Stream #0:0 (libx264)
    
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
    
Press [q] to stop, [?] for help
    
[libx264 @ 0x2672160] using SAR=1/1
    
[libx264 @ 0x2672160] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX LZCNT
    
[libx264 @ 0x2672160] profile Constrained Baseline, level 3.1
    
[libx264 @ 0x2672160] 264 - core 148 - H.264/MPEG-4 AVC codec - Copyleft 2003-2016 - http://www.videolan.org/x264.html - options: cabac=0 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 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=0 weightp=0 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 'back.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf57.71.100
    
    Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 1280x464 [SAR 1:1 DAR 80:29], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
    
    Metadata:
    
      encoder         : Lavc57.89.100 libx264
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    
    Stream #0:1(und): Audio: aac (LC) ([64][0][0][0] / 0x0040), 44100 Hz, mono, fltp, 69 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
      encoder         : Lavc57.89.100 aac
    
frame=   98 fps= 27 q=-1.0 Lsize=     268kB time=00:00:03.92 bitrate= 559.2kbits/s speed=1.07x
    
video:230kB audio:33kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.538479%
    
[libx264 @ 0x2672160] frame I:1     Avg QP:19.57  size:112129
    
[libx264 @ 0x2672160] frame P:97    Avg QP:21.68  size:  1270
    
[libx264 @ 0x2672160] mb I  I16..4: 35.4%  0.0% 64.6%
    
[libx264 @ 0x2672160] mb P  I16..4:  0.2%  0.0%  0.1%  P16..4:  6.9%  2.0%  0.8%  0.0%  0.0%    skip:90.1%
    
[libx264 @ 0x2672160] coded y,uvDC,uvAC intra: 54.4% 69.1% 54.2% inter: 2.0% 3.6% 0.3%
    
[libx264 @ 0x2672160] i16 v,h,dc,p: 63% 23%  8%  6%
    
[libx264 @ 0x2672160] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 26% 17% 11%  6%  8%  9%  7%  8%  8%
    
[libx264 @ 0x2672160] i8c dc,h,v,p: 50% 18% 24%  7%
    
[libx264 @ 0x2672160] ref P L0: 81.8% 11.5%  6.7%
    
[libx264 @ 0x2672160] kb/s:480.15
    
[aac @ 0x2675fa0] Qavg: 119.994

    CONCAT Videos

    ffmpeg -f concat -safe 0 -i concat.txt -c copy -r 25 -y /concat.mp4 
    
ffmpeg version n3.3 Copyright (c) 2000-2017 the FFmpeg developers
    
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
    
  configuration: --prefix=/usr --extra-cflags=-I/usr/include --extra-ldflags=-L/usr/lib --bindir=/usr/local/bin --extra-libs=-ldl --enable-gpl --enable-libass --enable-libfdk-aac --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-libssh --enable-openssl
    
  libavutil      55. 58.100 / 55. 58.100
    
  libavcodec     57. 89.100 / 57. 89.100
    
  libavformat    57. 71.100 / 57. 71.100
    
  libavdevice    57.  6.100 / 57.  6.100
    
  libavfilter     6. 82.100 /  6. 82.100
    
  libswscale      4.  6.100 /  4.  6.100
    
  libswresample   2.  7.100 /  2.  7.100
    
  libpostproc    54.  5.100 / 54.  5.100
    
Input #0, concat, from 'concat.txt':
    
  Duration: N/A, start: 0.000000, bitrate: N/A
    
    Stream #0:0: Video: h264 (Constrained Baseline) ([27][0][0][0] / 0x001B), yuv420p(progressive), 1280x464 [SAR 1:1 DAR 80:29], 25 fps, 25 tbr, 90k tbn, 50 tbc
    
    Stream #0:1(und): Audio: aac (LC) ([15][0][0][0] / 0x000F), 44100 Hz, mono, fltp, 74 kb/s
    
Output #0, mp4, to 'concat.mp4':
    
  Metadata:
    
    encoder         : Lavf57.71.100
    
    Stream #0:0: Video: h264 (Constrained Baseline) ([33][0][0][0] / 0x0021), yuv420p(progressive), 1280x464 [SAR 1:1 DAR 80:29], q=2-31, 25 fps, 25 tbr, 12800 tbn, 25 tbc
    
    Stream #0:1(und): Audio: aac (LC) ([64][0][0][0] / 0x0040), 44100 Hz, mono, fltp, 74 kb/s
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)
    
  Stream #0:1 -> #0:1 (copy)
    
Press [q] to stop, [?] for help
    
frame=37508 fps=7256 q=-1.0 Lsize=  114285kB time=00:25:00.59 bitrate= 623.9kbits/s speed= 290x
    
video:100672kB audio:12598kB subtitle:0kB other streams:0kB global headers:1kB muxing overhead: 0.896435%

    If needed I can provide samples.

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