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Autres articles (111)
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Submit bugs and patches
13 avril 2011Unfortunately a software is never perfect.
If you think you have found a bug, report it using our ticket system. Please to help us to fix it by providing the following information : the browser you are using, including the exact version as precise an explanation as possible of the problem if possible, the steps taken resulting in the problem a link to the site / page in question
If you think you have solved the bug, fill in a ticket and attach to it a corrective patch.
You may also (...) -
Personnaliser les catégories
21 juin 2013, parFormulaire de création d’une catégorie
Pour ceux qui connaissent bien SPIP, une catégorie peut être assimilée à une rubrique.
Dans le cas d’un document de type catégorie, les champs proposés par défaut sont : Texte
On peut modifier ce formulaire dans la partie :
Administration > Configuration des masques de formulaire.
Dans le cas d’un document de type média, les champs non affichés par défaut sont : Descriptif rapide
Par ailleurs, c’est dans cette partie configuration qu’on peut indiquer le (...) -
HTML5 audio and video support
13 avril 2011, parMediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
For older browsers the Flowplayer flash fallback is used.
MediaSPIP allows for media playback on major mobile platforms with the above (...)
Sur d’autres sites (12631)
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How to initialize the AV format context from NetworkStream rather than url ?
23 juillet 2020, par AhmadI'm using FFmpeg.AutoGen to encode catpured frames :
https://github.com/Ruslan-B/FFmpeg.AutoGen


I send the encoded packets through NetworkStream to another program using TCP Client/Server application, using this code :


//Send size and encoded packet
 _stream.Write(BitConverter.GetBytes(pPacket->size), 0, 4);
 using (var packetStream = new UnmanagedMemoryStream(pPacket->data, pPacket->size)) 
 packetStream.CopyTo(_stream);


At the server-side, after UTF8 encoding, I receive content like this :




gd ?r@ ?/ ?a 21 ?
h?C?,? ????E???H??,? ?#??x264 - core 160 - H.264/MPEG-4 AVC codec - Copyleft 2003-2020 - http://www.videolan.org/x264.html - options: cabac=1 ref=16 deblock=1:0:0 analyse=0x3:0x133 me=umh subme=10 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=24 chroma_me=1 trellis=2 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=11 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=8 b_pyramid=2 b_adapt=2 b_bias=0 direct=3 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=60 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00 ? e?? ??S?T????M?.O ??Ea???Q?OI??X?????[?P???42=h??M?K? ??{?@c;?t???Ke?>?????2 ?? ?\qXEvg ???U A ?X ??q/(?? ?L ?_c ?g ?X ?c(To ?k ?Y ?-F ???R ?] ??U ?
 ;|=r ????\U ???2 ?g ??> ??½ ?7 ?A ?1W9 ???A ?? ?_L ??P ?) ?M ????q/ ?L ??) : ??< ??8d/* ? ?^ ??} ?B ?H ?_8C[y ???CY ?QM(J ???1<3% ?K ?F ;Q3Q ????
 ??jyJ" ???y]k ?m ?^} ???S ????h ?3 ????EP ???pw ???q ?jKp ???h ?????



My problem is, how to initialize the AV format context with this data, and decode the received packet to recover the original frame ?


_pFormatContext = ffmpeg.avformat_alloc_context();
ffmpeg.avformat_open_input(&pFormatContext, url, null, null).ThrowExceptionIfError();


As problem exactly is, ffmpeg.avformat_open_input takes URL as an input, not byte[]. If _pFormatContext can be initialized using the received data, things are resolved, but HOW ?


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ffmpeg segmentation filter don't works with strftime filename template
24 juillet 2020, par Ksnadr RenderonI try to run ffmpeg with segment filter and timestamp filename template :


ffmpeg -f v4l2 -framerate 30 -video_size 960x720 -i /dev/video0 -f segment -segment_time 5 -reset_timestamps 1 -segment_format mp4 -strftime 1 out%Y-%m-%d_%H-%M-%S.mp4


and i got error :


Invalid segment filename template 'out%Y-%m-%d_%H-%M-%S.mp4'


I have read a lot of posts and questions in the internet with the same arguments (after input, which is specific) and people says that this works. What wrong with my command ?


UPD : add full ffmpeg log


root@nanopiair:~# ffmpeg -f v4l2 -framerate 30 -video_size 960x720 -i /dev/video0 -f segment -segment_time 5 -reset_timestamps 1 -segment_format mp4 -strftime 1 out%Y-%m-%d_%H-%M-%S.mp4
ffmpeg version git-2015-01-22-f86a076 Copyright (c) 2000-2014 the FFmpeg developers
 built on Jul 22 2020 12:02:39 with gcc 8 (Debian 8.3.0-6)
 configuration: --prefix=/usr --enable-nonfree --enable-gpl --enable-vdpau --enable-libx264 --enable-libv4l2 --enable-libfreetype --enable-libfontconfig --enable-libfribidi
 libavutil 54. 6.100 / 54. 6.100
 libavcodec 56. 0.101 / 56. 0.101
 libavformat 56. 2.100 / 56. 2.100
 libavdevice 56. 0.100 / 56. 0.100
 libavfilter 5. 0.102 / 5. 0.102
 libswscale 3. 0.100 / 3. 0.100
 libswresample 1. 1.100 / 1. 1.100
 libpostproc 53. 0.100 / 53. 0.100
Input #0, video4linux2,v4l2, from '/dev/video0':
 Duration: N/A, start: 2548.007454, bitrate: 248832 kb/s
 Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 960x720, 248832 kb/s, 30 fps, 30 tbr, 1000k tbn, 1000k tbc
[libx264 @ 0x201bec0] using cpu capabilities: ARMv6 NEON
[libx264 @ 0x201bec0] profile High, level 3.1
[libx264 @ 0x201bec0] 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=6 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
[mp4 @ 0x2507bd0] Invalid segment filename template 'out%Y-%m-%d_%H-%M-%S.mp4'
Output #0, segment, to 'out%Y-%m-%d_%H-%M-%S.mp4':
 Metadata:
 encoder : Lavf56.2.100
 Stream #0:0: Video: h264 (libx264), yuv420p, 960x720, q=-1--1, 30 fps, 30 tbn, 30 tbc
 Metadata:
 encoder : Lavc56.0.101 libx264
Stream mapping:
 Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument


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ffmpeg : Extract unknown data stream from video container
23 juillet 2020, par PikkostackI have a .MOV container which contains the following tracks :


Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 3840x2160 [SAR 1:1 DAR 16:9], 100619 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc (default)
Metadata:
 creation_time : 2020-07-21T22:48:24.000000Z
 handler_name : DJI.AVC
 encoder : AVC encoder
Stream #0:1(eng): Data: none (priv / 0x76697270), 87 kb/s
Metadata:
 creation_time : 2020-07-21T22:48:24.000000Z
 handler_name : DJI.Meta
Stream #0:2(eng): Subtitle: mov_text (text / 0x74786574), 2 kb/s (default)
Metadata:
 creation_time : 2020-07-21T22:48:24.000000Z
 handler_name : DJI.Subtitle


As you can see, stream #0:1, called DJI.meta, is of an unknown data format. I just want to extract the raw data of this stream to a file. So that is the ffmpeg command I tried :


ffmpeg -i .\DJI_0001.MOV -map 0:1 metadata


But using this command results in the following error :


Unable to find a suitable output format for 'metadata'
metadata: Invalid argument


How can I tell ffmpeg that the data should not be formated, so that only the raw data is extracted ?


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