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Autres articles (41)

  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • Creating farms of unique websites

    13 avril 2011, par

    MediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
    This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...)

  • Other interesting software

    13 avril 2011, par

    We don’t claim to be the only ones doing what we do ... and especially not to assert claims to be the best either ... What we do, we just try to do it well and getting better ...
    The following list represents softwares that tend to be more or less as MediaSPIP or that MediaSPIP tries more or less to do the same, whatever ...
    We don’t know them, we didn’t try them, but you can take a peek.
    Videopress
    Website : http://videopress.com/
    License : GNU/GPL v2
    Source code : (...)

Sur d’autres sites (5712)

  • AVAssetWriter single frame

    5 novembre 2015, par Robert Figueira

    I’m trying to encode frame sequences to quicktime movies using AVAssetWriter, which works brilliantly. Problem is, it fails when I give it only one frame to write as a movie (the details of why I need single frame quicktime movies aren’t important, suffice to say it’s a necessary workflow thing for a very specific use case). It works fine with two frames, but with one frame it exits with the following error when calling AVAssetWriter.finishWritingWithCompletionHandler :

    writer failed with error : Optional(Error Domain=AVFoundationErrorDomain Code=-11800 "The operation could not be completed" UserInfo=NSUnderlyingError=0x6180000427c0 Error Domain=NSOSStatusErrorDomain Code=-12769 "(null)", NSLocalizedFailureReason=An unknown error occurred (-12769), NSLocalizedDescription=The operation could not be completed)

    This is true for all file types - since by that time it’s just reading in pixel buffers. I stepped through line by line while debugging and it definitely has appended the single pixel buffer before finishing, it just won’t write the movie with only a single frame.

    The thing that makes me think it’s more of an Apple problem and not just me is that ffmpeg won’t write single frame movies either... Anyone have some insight as to why this is happening ? I can’t see any reason why a two frame movie would work fine but a one frame movie fails to write. Thanks,

    Robert

  • ffmpeg : Resource temporarily unavailable

    26 octobre 2015, par Cabbage soup

    I’m trying to run ffmpeg on a linux server (info from uname -a) :

    Linux comp32 2.6.32-279.14.1.el6.x86_64 #1 SMP Tue Nov 6 11:21:14 CST 2012 x86_64 x86_64 x86_64 GNU/Linux

    ffmpeg (together with the required encoders and decoders) compiles successfully on the system, but when I try to perform a basic operation like the following : ffmpeg -v debug -i example.m4v image%d.jpg, I get a slightly cryptic error message :

    ffmpeg version 2.8.1 Copyright (c) 2000-2015 the FFmpeg developers
    
built with gcc 4.7.1 (GCC)
    
configuration: --prefix=/users/albanie/local/usr
    
libavutil      54. 31.100 / 54. 31.100
    
libavcodec     56. 60.100 / 56. 60.100
    
libavformat    56. 40.101 / 56. 40.101
    
libavdevice    56.  4.100 / 56.  4.100
    
libavfilter     5. 40.101 /  5. 40.101
    
libswscale      3.  1.101 /  3.  1.101
    
libswresample   1.  2.101 /  1.  2.101
    
Splitting the commandline.
    
Reading option '-v' ... matched as option 'v' (set logging level) with argument 'debug'.
    
Reading option '-i' ... matched as input file with argument 'example.m4v'.
    
Reading option 'image%d.jpg' ... matched as output file.
    
Finished splitting the commandline.
    
Parsing a group of options: global .
    
Applying option v (set logging level) with argument debug.
    
Successfully parsed a group of options.
    
Parsing a group of options: input file example.m4v.
    
Successfully parsed a group of options.
    
Opening an input file: example.m4v.
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x2ee2380] Format mov,mp4,m4a,3gp,3g2,mj2 probed with size=2048 and score=100
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x2ee2380] ISO: File Type Major Brand: M4V
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x2ee2380] Before avformat_find_stream_info() pos: 185580655 bytes read:927102 seeks:1
    
[h264 @ 0x2ee3720] no picture
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x2ee2380] All info found
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x2ee2380] After avformat_find_stream_info() pos: 24214 bytes read:959870 seeks:2 frames:3
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'example.m4v':
    
Metadata:
    
  major_brand     : M4V
    
  minor_version   : 512
    
  compatible_brands: isomiso2avc1
    
  encoder         : Lavf56.25.101
    
Duration: 00:13:47.93, start: 0.033333, bitrate: 1793 kb/s
    
Stream #0:0(und), 2, 1/30000: Video: h264 (High), 4 reference frames (avc1 / 0x31637661), yuv420p(left), 720x576 [SAR 64:45 DAR 16:9], 1001/60000, 1656 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc (default)
    
Metadata:
    
  handler_name    : VideoHandler
    
Stream #0:1(eng), 1, 1/48000: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
    
Metadata:
    
  handler_name    : SoundHandler
    
Successfully opened the file.
    
Parsing a group of options: output file image%d.jpg.
    
Successfully parsed a group of options.
    
Opening an output file: image%d.jpg.
    
Successfully opened the file.
    
detected 32 logical cores
    
[graph 0 input from stream 0:0 @ 0x303f7c0] Setting 'video_size' to value '720x576'
    
[graph 0 input from stream 0:0 @ 0x303f7c0] Setting 'pix_fmt' to value '0'
    
[graph 0 input from stream 0:0 @ 0x303f7c0] Setting 'time_base' to value '1/30000'
    
[graph 0 input from stream 0:0 @ 0x303f7c0] Setting 'pixel_aspect' to value '64/45'
    
[graph 0 input from stream 0:0 @ 0x303f7c0] Setting 'sws_param' to value 'flags=2'
    
[graph 0 input from stream 0:0 @ 0x303f7c0] Setting 'frame_rate' to value '30000/1001'
    
[graph 0 input from stream 0:0 @ 0x303f7c0] w:720 h:576 pixfmt:yuv420p tb:1/30000 fr:30000/1001 sar:64/45 sws_param:flags=2
    
[format @ 0x2f750c0] compat: called with args=[yuvj420p|yuvj422p|yuvj444p]
    
[format @ 0x2f750c0] Setting 'pix_fmts' to value 'yuvj420p|yuvj422p|yuvj444p'
    
[auto-inserted scaler 0 @ 0x2f75f00] Setting 'flags' to value 'bicubic'
    
[auto-inserted scaler 0 @ 0x2f75f00] w:iw h:ih flags:'bicubic' interl:0
    
[format @ 0x2f750c0] auto-inserting filter 'auto-inserted scaler 0' between the filter 'Parsed_null_0' and the filter 'format'
    
[AVFilterGraph @ 0x303f720] query_formats: 4 queried, 2 merged, 1 already done, 0 delayed
    
[auto-inserted scaler 0 @ 0x2f75f00] picking yuvj420p out of 3 ref:yuv420p alpha:0
    
[swscaler @ 0x2f664a0] deprecated pixel format used, make sure you did set range correctly
    
[auto-inserted scaler 0 @ 0x2f75f00] w:720 h:576 fmt:yuv420p sar:64/45 -> w:720 h:576 fmt:yuvj420p sar:64/45 flags:0x4
    
[mjpeg @ 0x2ee96c0] Forcing thread count to 1 for MJPEG encoding, use -thread_type slice or a constant quantizer if you want to use multiple cpu cores
    
[mjpeg @ 0x2ee96c0] intra_quant_bias = 96 inter_quant_bias = 0
    
Output #0, image2, to 'image%d.jpg':
    
Metadata:
    
  major_brand     : M4V
    
  minor_version   : 512
    
  compatible_brands: isomiso2avc1
    
  encoder         : Lavf56.25.101
    
Stream #0:0(und), 0, 1001/30000: Video: mjpeg, 1 reference frame, yuvj420p(pc, left), 720x576 [SAR 64:45 DAR 16:9], 1001/30000, q=2-31, 200 kb/s, 29.97 fps, 29.97 tbn, 29.97 tbc (default)
    
Metadata:
    
  handler_name    : VideoHandler
    
  encoder         : Lavc56.60.100 mjpeg
    
Stream mapping:
    
Stream #0:0 -> #0:0 (h264 (native) -> mjpeg (native))
    
Error while opening decoder for input stream #0:0 : Resource temporarily unavailable
    
[AVIOContext @ 0x2eeaee0] Statistics: 959870 bytes read, 2 seeks

    I also tried using a static build off ffmpeg, downloaded from here, but got the same resource temporarily unavailable message. Any ideas on how I might be able to fix this ?

  • ffmpeg : packet size 2073600 expected frame_size 4147200

    11 novembre 2015, par mrana

    I have total 96 videos. I have converted most of videos using ffmpeg,
    but for some videos its giving me some error.
    As a first step I deinterlaced the video using the following command :

    ffmpeg -video_size 1920x1080 -r 25 -pixel_format yuv422p -i stockholm.yuv -vf yadif  stockholm_deInt.yuv

    And I am getting the following error :

    [rawvideo @ 0x7fa144008c00] Invalid buffer size, packet size 2073600 < expected frame_size 4147200
    Error while decoding stream #0:0 : Invalid argument
    frame= 187 fps=3.7 q=-0.0 Lsize= 757350kB time=00:00:07.48 bitrate=829440.0kbits/s
    video:757350kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead : 0.000000%

    When I try to get the info about the video (ffprobe stockholm.yuv) I get the following :

    [IMGUTILS @ 0x7fff5bac8140] Picture size 0x0 is invalid
    [IMGUTILS @ 0x7fff5bac8150] Picture size 0x0 is invalid
    [rawvideo @ 0x7fbcb200da00] Could not find codec parameters for stream 0 (Video : rawvideo (I420 / 0x30323449), yuv420p, -4 kb/s) : unspecified size
    Consider increasing the value for the ’analyzeduration’ and ’probesize’ options
    stockholm.yuv : Operation not permitted`

    Does anyone have any idea ?

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