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Publier sur MédiaSpip

13 juin 2013

Puis-je poster des contenus à partir d’une tablette Ipad ?
Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir
Gestion générale des documents

13 mai 2011, par kent1

MédiaSPIP ne modifie jamais le document original mis en ligne.
Pour chaque document mis en ligne il effectue deux opérations successives : la création d’une version supplémentaire qui peut être facilement consultée en ligne tout en laissant l’original téléchargeable dans le cas où le document original ne peut être lu dans un navigateur Internet ; la récupération des métadonnées du document original pour illustrer textuellement le fichier ;
Les tableaux ci-dessous expliquent ce que peut faire MédiaSPIP (...)
Les vidéos

21 avril 2011, par kent1

Comme les documents de type "audio", Mediaspip affiche dans la mesure du possible les vidéos grâce à la balise html5 .
Un des inconvénients de cette balise est qu’elle n’est pas reconnue correctement par certains navigateurs (Internet Explorer pour ne pas le nommer) et que chaque navigateur ne gère en natif que certains formats de vidéos.
Son avantage principal quant à lui est de bénéficier de la prise en charge native de vidéos dans les navigateur et donc de se passer de l’utilisation de Flash et (...)

1 | 2 | 3 | 4 | 5 | 6

Sur d’autres sites (3302)

Transcoding to webm with ffmpeg audio problems

9 novembre 2011, par Max A.
For the past few days, I have been trying to get my lossless .mov video(that has an audio track) to a .webm format.

Some info on the video & audio is that the fps is 30. Also the audio track has about 3-5 seconds of silence/blank audio before you start hearing some music.

My problem is that is seems during the transcoding to webm, it strips away this blank audio because when I go to play the video, the audio starts right away.I've also notice that it jumps right away to 4 seconds in the video. When i play it on the browser, it jumps to that moment in the timeline. If I try to scrub to the beginning, the video ends.

I've have figured somethings out.
1. This is just a webm problem. This does not happen with ogv or mp4
2. It only happens if they is blank audio in the beginning of the audio track.
I am using ffmpeg with the libvpx and libvorbis librarys and I am doing just the basic command line setup
```
ffmpeg -i "infile" "outfile.webm"
```

Encoding for HLS using FFMPEG results in have a decreasing DTS

29 décembre 2014, par Luuk D. Jansen

I am trying to encode video for HTS live streaming, but am having problems with validating the stream using Apple Media Validator (mediastreamvalidator).
(my test file : http://dominicansinteractive.idoms.org/media/9536/playlist.m3u8)

The output is :

--------------------------------------------------------------------------------

http://dominicansinteractive.idoms.org/media/9536/199/prog_index.m3u8

--------------------------------------------------------------------------------



Playlist Validation: 



    OK



Segments:



segment_00000.ts:



    ERROR: (-1) Decreasing DTS were detected in track 0

    ERROR: (-1) Decreasing DTS were detected in track 1



    Average segment duration: 8.07 seconds

    Average segment bitrate: 2155094.67 bps

    Average segment structural overhead: 206525.83 bps (9.58 %)

The second segment doesn’t seem to have the problem :

[mpegts @ 0x1d78120] Format mpegts probed with size=2048 and score=100

[mpegts @ 0x1d78120] stream=0 stream_type=1b pid=100 prog_reg_desc=

[mpegts @ 0x1d78120] stream=1 stream_type=f pid=101 prog_reg_desc=

[mpegts @ 0x1d78120] File position before avformat_find_stream_info() is 0

[h264 @ 0x1d7c1c0] Current profile doesn't provide more RBSP data in PPS, skipping

[h264 @ 0x1d7c1c0] no picture 

[h264 @ 0x1d7c1c0] Current profile doesn't provide more RBSP data in PPS, skipping

   Last message repeated 3 times

[mpegts @ 0x1d78120] max_analyze_duration 5000000 reached at 5013333

[mpegts @ 0x1d78120] File position after avformat_find_stream_info() is 0

This seems to be a serious problem for HLS, so I am looking if there is a way to fix this.

When looking with FFMPEG at the encoded file I get (encoder output/command at the bottom of the email) :

ffmpeg -loglevel 99 -i encoded.ts 

ffmpeg version N-37783-gdf3a96c Copyright (c) 2000-2012 the FFmpeg developers

 built on Jul  4 2012 07:44:52 with gcc 4.4.5

 configuration: --enable-gpl --enable-version3 --enable-nonfree --enable-libfaac --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libvpx --enable-libfaac --enable-nonfree

 libavutil      51. 63.100 / 51. 63.100

 libavcodec     54. 32.100 / 54. 32.100

 libavformat    54. 14.100 / 54. 14.100

 libavdevice    54.  0.100 / 54.  0.100

 libavfilter     3.  0.101 /  3.  0.101

 libswscale      2.  1.100 /  2.  1.100

 libswresample   0. 15.100 /  0. 15.100

 libpostproc    52.  0.100 / 52.  0.100

[mpegts @ 0x2023120] Format mpegts probed with size=2048 and score=100

[mpegts @ 0x2023120] stream=0 stream_type=1b pid=100 prog_reg_desc=

[mpegts @ 0x2023120] stream=1 stream_type=f pid=101 prog_reg_desc=

[mpegts @ 0x2023120] File position before avformat_find_stream_info() is 0

[h264 @ 0x20271c0] Current profile doesn't provide more RBSP data in PPS, skipping

[h264 @ 0x20271c0] no picture 

[mpegts @ 0x2023120] first_dts 124080 not matching first dts 143280 in que

   Last message repeated 6 times

[mpegts @ 0x2023120] first_dts 124080 not matching first dts 158640 in que

   Last message repeated 7 times

[mpegts @ 0x2023120] first_dts 124080 not matching first dts 175920 in que

   Last message repeated 7 times

[mpegts @ 0x2023120] first_dts 124080 not matching first dts 193200 in que

   Last message repeated 7 times

[mpegts @ 0x2023120] first_dts 124080 not matching first dts 210480 in que

   Last message repeated 7 times

[h264 @ 0x20271c0] Current profile doesn't provide more RBSP data in PPS, skipping

[mpegts @ 0x2023120] first_dts 124080 not matching first dts 227760 in que

   Last message repeated 7 times

[mpegts @ 0x2023120] first_dts 124080 not matching first dts 245040 in que

   Last message repeated 7 times

[mpegts @ 0x2023120] first_dts 124080 not matching first dts 262320 in que

   Last message repeated 7 times

[mpegts @ 0x2023120] first_dts 124080 not matching first dts 279600 in que

   Last message repeated 7 times

[mpegts @ 0x2023120] first_dts 124080 not matching first dts 296880 in que

   Last message repeated 7 times

[mpegts @ 0x2023120] first_dts 124080 not matching first dts 314160 in que

   Last message repeated 7 times

[h264 @ 0x20271c0] Current profile doesn't provide more RBSP data in PPS, skipping

[mpegts @ 0x2023120] first_dts 124080 not matching first dts 331440 in que

   Last message repeated 7 times

[mpegts @ 0x2023120] first_dts 124080 not matching first dts 348720 in que

   Last message repeated 7 times

[mpegts @ 0x2023120] first_dts 124080 not matching first dts 366000 in que

   Last message repeated 7 times

[mpegts @ 0x2023120] first_dts 124080 not matching first dts 383280 in que

   Last message repeated 7 times

[mpegts @ 0x2023120] first_dts 124080 not matching first dts 400560 in que

   Last message repeated 7 times

[mpegts @ 0x2023120] first_dts 124080 not matching first dts 417840 in que

   Last message repeated 6 times

[h264 @ 0x20271c0] Current profile doesn't provide more RBSP data in PPS, skipping

[mpegts @ 0x2023120] first_dts 124080 not matching first dts 433200 in que

   Last message repeated 6 times

[mpegts @ 0x2023120] first_dts 124080 not matching first dts 448560 in que

   Last message repeated 7 times

[mpegts @ 0x2023120] first_dts 124080 not matching first dts 465840 in que

   Last message repeated 6 times

[mpegts @ 0x2023120] first_dts 124080 not matching first dts 481200 in que

   Last message repeated 7 times

[mpegts @ 0x2023120] first_dts 124080 not matching first dts 498480 in que

   Last message repeated 7 times

[mpegts @ 0x2023120] first_dts 124080 not matching first dts 515760 in que

   Last message repeated 7 times

[mpegts @ 0x2023120] first_dts 124080 not matching first dts 533040 in que

   Last message repeated 6 times

[h264 @ 0x20271c0] Current profile doesn't provide more RBSP data in PPS, skipping

[mpegts @ 0x2023120] first_dts 124080 not matching first dts 548400 in que

   Last message repeated 7 times

[mpegts @ 0x2023120] max_analyze_duration 5000000 reached at 5000000

[mpegts @ 0x2023120] File position after avformat_find_stream_info() is 0



And when at the first segmented file:

ffmpeg -loglevel 99 -i segment_00000.ts 

ffmpeg version N-37783-gdf3a96c Copyright (c) 2000-2012 the FFmpeg developers

 built on Jul  4 2012 07:44:52 with gcc 4.4.5

 configuration: --enable-gpl --enable-version3 --enable-nonfree --enable-libfaac --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libvpx --enable-libfaac --enable-nonfree

 libavutil      51. 63.100 / 51. 63.100

 libavcodec     54. 32.100 / 54. 32.100

 libavformat    54. 14.100 / 54. 14.100

 libavdevice    54.  0.100 / 54.  0.100

 libavfilter     3.  0.101 /  3.  0.101

 libswscale      2.  1.100 /  2.  1.100

 libswresample   0. 15.100 /  0. 15.100

 libpostproc    52.  0.100 / 52.  0.100

[mpegts @ 0x1a0b120] Format mpegts probed with size=2048 and score=100

[mpegts @ 0x1a0b120] stream=0 stream_type=1b pid=100 prog_reg_desc=

[mpegts @ 0x1a0b120] stream=1 stream_type=f pid=101 prog_reg_desc=

[mpegts @ 0x1a0b120] File position before avformat_find_stream_info() is 0

[mpegts @ 0x1a0b120] Invalid timestamps stream=0, pts=1920, dts=8589929312, size=2355

[mpegts @ 0x1a0b120] Invalid timestamps stream=0, pts=16320, dts=8589932912, size=3203

[h264 @ 0x1a0f1c0] Current profile doesn't provide more RBSP data in PPS, skipping

[h264 @ 0x1a0f1c0] no picture 

[h264 @ 0x1a0f1c0] Current profile doesn't provide more RBSP data in PPS, skipping

   Last message repeated 3 times

[mpegts @ 0x1a0b120] max_analyze_duration 5000000 reached at 5013333

[mpegts @ 0x1a0b120] File position after avformat_find_stream_info() is 0

This problem does not occur with the BASELINE profile, but does with MAIN.

The command I use for encoding is :

ffmpeg, -i, [path]/test.mov, -y, -f, mpegts, -acodec, aac, -strict, -2, -ar, 48000, -b:a, 128000, -s, 960x540, -vcodec, libx264, -b:v, 1200000, -aspect, 960:540, -r, 25, -level, 3.1, -vprofile, main, -flags, +loop, -cmp, +chroma, -partitions, +parti4x4+partp8x8+partb8x8, -subq, 5, -trellis, 1, -refs, 1, -coder, 0, -me_range, 16, -keyint_min, 25, -sc_threshold, 40, -i_qfactor, 0.71, -bt, 200k, -maxrate, 1200000, -bufsize, 1200000, -rc_eq, 'blurCplx^(1-qComp)', -qcomp, 0.6, -qmin, 10, -qmax, 51, -qdiff, 4, -level, 30, -g, 30, -async, 2, [path]/encoded.ts



08:40:29,843 DEBUG ~ FFMPEG(1):   libavutil      51. 63.100 / 51. 63.100

08:40:29,843 DEBUG ~ FFMPEG(1):   libavcodec     54. 32.100 / 54. 32.100

08:40:29,843 DEBUG ~ FFMPEG(1):   libavformat    54. 14.100 / 54. 14.100

08:40:29,843 DEBUG ~ FFMPEG(1):   libavdevice    54.  0.100 / 54.  0.100

08:40:29,843 DEBUG ~ FFMPEG(1):   libavfilter     3.  0.101 /  3.  0.101

08:40:29,844 DEBUG ~ FFMPEG(1):   libswscale      2.  1.100 /  2.  1.100

08:40:29,844 DEBUG ~ FFMPEG(1):   libswresample   0. 15.100 /  0. 15.100

08:40:29,844 DEBUG ~ FFMPEG(1):   libpostproc    52.  0.100 / 52.  0.100

08:40:30,033 DEBUG ~ FFMPEG(1): Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '[path]/test.mov':

08:40:30,033 DEBUG ~ FFMPEG(1):   Metadata:

08:40:30,033 DEBUG ~ FFMPEG(1):     major_brand     : qt  

08:40:30,033 DEBUG ~ FFMPEG(1):     minor_version   : 537199360

08:40:30,035 DEBUG ~ FFMPEG(1):     compatible_brands: qt  

08:40:30,035 DEBUG ~ FFMPEG(1):     creation_time   : 2011-12-05 10:54:24

08:40:30,036 DEBUG ~ FFMPEG(1):     timecode        : 00:00:00:00

08:40:30,036 DEBUG ~ FFMPEG(1):   Duration: 00:00:24.20, start: 0.000000, bitrate: 9912 kb/s

08:40:30,037 DEBUG ~ FFMPEG(1):     Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1920x1080, 9777 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc

08:40:30,037 DEBUG ~ FFMPEG(1):     Metadata:

08:40:30,037 DEBUG ~ FFMPEG(1):       creation_time   : 2011-12-05 10:56:28

08:40:30,037 DEBUG ~ FFMPEG(1):       handler_name    : Apple Video Media Handler

08:40:30,038 DEBUG ~ FFMPEG(1):     Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, s16, 129 kb/s

08:40:30,038 DEBUG ~ FFMPEG(1):     Metadata:

08:40:30,038 DEBUG ~ FFMPEG(1):       creation_time   : 2011-12-05 10:56:28

08:40:30,038 DEBUG ~ FFMPEG(1):       handler_name    : Apple Sound Media Handler

08:40:30,038 DEBUG ~ FFMPEG(1):     Stream #0:2(eng): Data: none (tmcd / 0x64636D74)

08:40:30,038 DEBUG ~ FFMPEG(1):     Metadata:

08:40:30,038 DEBUG ~ FFMPEG(1):       creation_time   : 2011-12-05 10:56:28

08:40:30,039 DEBUG ~ FFMPEG(1):       handler_name    : Time Code Media Handler

08:40:30,039 DEBUG ~ FFMPEG(1):       timecode        : 00:00:00:00

08:40:30,092 DEBUG ~ FFMPEG(1): [graph 0 input from stream 0:0 @ 0x1c17180] w:1920 h:1080 pixfmt:yuv420p tb:1/25 fr:25/1 sar:0/1 sws_param:flags=2

08:40:30,092 DEBUG ~ FFMPEG(1): [output stream 0:0 @ 0x1c033a0] No opaque field provided

08:40:30,110 DEBUG ~ FFMPEG(1): [scaler for output stream 0:0 @ 0x1c18040] w:1920 h:1080 fmt:yuv420p sar:0/1 -> w:960 h:540 fmt:yuv420p sar:0/1 flags:0x4

08:40:30,110 DEBUG ~ FFMPEG(1): [graph 1 input from stream 0:1 @ 0x1c53440] tb:1/48000 samplefmt:s16 samplerate:48000 chlayout:0x3

08:40:30,110 DEBUG ~ FFMPEG(1): -async is forwarded to lavfi similarly to -af aresample=min_comp=0.001:min_hard_comp=0.100000:max_soft_comp=0.000042.

08:40:30,122 DEBUG ~ FFMPEG(1): [graph 1 aresample for input stream 0:1 @ 0x1c36880] chl:stereo fmt:s16 r:48000Hz -> chl:stereo fmt:flt r:48000Hz

08:40:30,142 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] using SAR=1/1

08:40:30,142 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] frame MB size (60x34) > level limit (1620)

08:40:30,142 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] DPB size (4 frames, 3133440 bytes) > level limit (3 frames, 3110400 bytes)

08:40:30,142 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] MB rate (51000) > level limit (40500)

08:40:30,170 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] using cpu capabilities: MMX2 SSE2Slow SlowCTZ

08:40:30,182 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] profile Main, level 3.0

08:40:30,235 DEBUG ~ FFMPEG(1): [mpegts @ 0x1be3540] muxrate VBR, pcr every 2 pkts, sdt every 200, pat/pmt every 40 pkts

08:40:30,235 DEBUG ~ FFMPEG(1): Output #0, mpegts, to '[path]/encoded.ts':

08:40:30,235 DEBUG ~ FFMPEG(1):   Metadata:

08:40:30,235 DEBUG ~ FFMPEG(1):     major_brand     : qt  

08:40:30,235 DEBUG ~ FFMPEG(1):     minor_version   : 537199360

08:40:30,235 DEBUG ~ FFMPEG(1):     compatible_brands: qt  

08:40:30,235 DEBUG ~ FFMPEG(1):     timecode        : 00:00:00:00

08:40:30,235 DEBUG ~ FFMPEG(1):     encoder         : Lavf54.14.100

08:40:30,235 DEBUG ~ FFMPEG(1):     Stream #0:0(eng): Video: h264, yuv420p, 960x540 [SAR 1:1 DAR 16:9], q=10-51, 1200 kb/s, 90k tbn, 25 tbc

08:40:30,235 DEBUG ~ FFMPEG(1):     Metadata:

08:40:30,235 DEBUG ~ FFMPEG(1):       creation_time   : 2011-12-05 10:56:28

08:40:30,235 DEBUG ~ FFMPEG(1):       handler_name    : Apple Video Media Handler

08:40:30,236 DEBUG ~ FFMPEG(1):     Stream #0:1(eng): Audio: aac, 48000 Hz, stereo, flt, 128 kb/s

08:40:30,236 DEBUG ~ FFMPEG(1):     Metadata:

08:40:30,236 DEBUG ~ FFMPEG(1):       creation_time   : 2011-12-05 10:56:28

08:40:30,236 DEBUG ~ FFMPEG(1):       handler_name    : Apple Sound Media Handler

08:40:30,236 DEBUG ~ FFMPEG(1): Stream mapping:

08:40:30,236 DEBUG ~ FFMPEG(1):   Stream #0:0 -> #0:0 (h264 -> libx264)

08:40:30,236 DEBUG ~ FFMPEG(1):   Stream #0:1 -> #0:1 (aac -> aac)



[...]



08:40:55,398 DEBUG ~ FFMPEG(1): video:3121kB audio:359kB subtitle:0 global headers:0kB muxing overhead 11.132085%

08:40:55,407 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] frame I:21    Avg QP:21.57  size: 88153

08:40:55,407 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] frame P:233   Avg QP:22.74  size:  5560

08:40:55,407 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] frame B:351   Avg QP:27.45  size:   141

08:40:55,407 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] consecutive B-frames: 21.7%  2.0%  3.0% 73.4%

08:40:55,407 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] mb I  I16..4: 54.5%  0.0% 45.5%

08:40:55,422 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] mb P  I16..4:  4.7%  0.0%  1.3%  P16..4: 24.6%  3.5%  0.8%  0.0%  0.0%    skip:65.1%

08:40:55,422 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] mb B  I16..4:  0.1%  0.0%  0.1%  B16..8:  0.5%  0.1%  0.0%  direct: 0.6%  skip:98.6%  L0:32.3% L1:47.1% BI:20.6%

08:40:55,422 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] coded y,uvDC,uvAC intra: 59.4% 5.8% 0.4% inter: 5.4% 3.0% 0.0%

08:40:55,422 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] i16 v,h,dc,p: 58% 16% 21%  4%

08:40:55,422 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 20% 21% 17%  5% 10%  7%  5%  5% 10%

08:40:55,422 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] i8c dc,h,v,p: 94%  3%  3%  0%

08:40:55,422 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] Weighted P-Frames: Y:13.7% UV:3.4%

08:40:55,422 DEBUG ~ FFMPEG(1): [libx264 @ 0x1be3cc0] kb/s:1056.61

For segmenting is :

ffmpeg, -i,[path]encoded.ts, -y, -c, copy, -flags, global_header, -map, 0, -f, segment, -segment_time, 10, -segment_list, [path]/fileList.txt, -segment_format, mpegts, [path]/segment_%05d.ts]

Any help would really be appreciated !

ffmpeg : need for speed

21 juillet 2012, par roufamatic
I am using ffmpeg to convert a set of images (bmps) with an audio track into Web ready video. Target formats are h.264 mp4, webm and flv.
This is on a Windows Azure extra-large instance (8 proc) using the prebuilt zeranoe static builds ( http://ffmpeg.zeranoe.com/builds/).

Suppose I'm willing to sacrifice quality and size for raw speed. What options for each format will yield the quickest result ?

My "baseline" command looks like this (swap the extension for the other formats) :
```
ffmpeg -y -i frames%5d.bmp -i audio.mp3 -r 23.97 out.mp4
```
I can change the inputs to other formats if needed (jpg images, aac audio, etc).

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Recherche avancée

Médias (91)

Changer le statut d’un utilisateur de visiteur en rédacteur

Autres articles (17)

Publier sur MédiaSpip

Gestion générale des documents

Les vidéos

Sur d’autres sites (3302)

Transcoding to webm with ffmpeg audio problems

Encoding for HLS using FFMPEG results in have a decreasing DTS

ffmpeg : need for speed

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