
Recherche avancée
Médias (1)
-
Bug de détection d’ogg
22 mars 2013, par
Mis à jour : Avril 2013
Langue : français
Type : Video
Autres articles (39)
-
Websites made with MediaSPIP
2 mai 2011, parThis page lists some websites based on MediaSPIP.
-
Creating farms of unique websites
13 avril 2011, parMediaSPIP 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" (...) -
Mise à disposition des fichiers
14 avril 2011, parPar défaut, lors de son initialisation, MediaSPIP ne permet pas aux visiteurs de télécharger les fichiers qu’ils soient originaux ou le résultat de leur transformation ou encodage. Il permet uniquement de les visualiser.
Cependant, il est possible et facile d’autoriser les visiteurs à avoir accès à ces documents et ce sous différentes formes.
Tout cela se passe dans la page de configuration du squelette. Il vous faut aller dans l’espace d’administration du canal, et choisir dans la navigation (...)
Sur d’autres sites (8079)
-
AVCodecContext settings for H264 (1080i)
23 septembre 2013, par mooseI'm trying to configure x264 for 1080i capturing. Most of these settings below are found in different examples. However, compiled together they don't work. ffmpeg API reports no error, but
avcodec_encode_video()
always returns zero.Some of the numbers are strange to me... for example,
gop_size
. Isn't 250 too high ?Event you can't offer the final answer, I'm still interested in any kind of comment on this subject.
pCodecContext->codec_type = AVMEDIA_TYPE_VIDEO;
pCodecContext->codec_id = CODEC_ID_H264;
pCodecContext->coder_type = FF_CODER_TYPE_AC;
pCodecContext->flags |= CODEC_FLAG_LOOP_FILTER | CODEC_FLAG_INTERLACED_ME | CODEC_FLAG_INTERLACED_DCT;
pCodecContext->me_cmp |= 1;
pCodecContext->partitions |= X264_PART_I8X8 | X264_PART_I4X4 | X264_PART_P8X8 | X264_PART_B8X8;
pCodecContext->me_method = ME_UMH;
pCodecContext->me_subpel_quality = 8;
pCodecContext->me_range = 16;
pCodecContext->bit_rate = 10 * 1024 * 1024; // 10 Mbps??
pCodecContext->width = 1920;
pCodecContext->height = 1080;
pCodecContext->time_base.num = 1; // 25 fps
pCodecContext->time_base.den = 25; // 25 fps
pCodecContext->gop_size = 250; // 250
pCodecContext->keyint_min = 25;
pCodecContext->scenechange_threshold = 40;
pCodecContext->i_quant_factor = 0.71f;
pCodecContext->b_frame_strategy = 1;
pCodecContext->qcompress = 0.6f;
pCodecContext->qmin = 10;
pCodecContext->qmax = 51;
pCodecContext->max_qdiff = 4;
pCodecContext->max_b_frames = 3;
pCodecContext->refs = 4;
pCodecContext->directpred = 3;
pCodecContext->trellis = 1;
pCodecContext->flags2 |= CODEC_FLAG2_WPRED | CODEC_FLAG2_MIXED_REFS | CODEC_FLAG2_8X8DCT | CODEC_FLAG2_FASTPSKIP; // wpred+mixed_refs+dct8x8+fastpskip
pCodecContext->weighted_p_pred = 2; // not implemented with interlaced ??
pCodecContext->crf = 22;
pCodecContext->pix_fmt = PIX_FMT_YUV420P;
pCodecContext->thread_count = 0; -
encoding jpeg as h264 video
22 février 2017, par jefftimestenI am using the following command to encode an AVI to an H264 video for use in an HTML5 video tag :
ffmpeg -y -i "test.avi" -vcodec libx264 -vpre slow -vpre baseline -g 30 "out.mp4"
And this works just fine. But I also want to create a placeholder video (long story) from a single still image, so I do this :
ffmpeg -y -i "test.jpg" -vcodec libx264 -vpre slow -vpre baseline -g 30 "out.mp4"
And this doesn’t work. What gives ?
EDIT : After trying LordNeckbeards answer, here is my full output : http://pastebin.com/axhKpkLx
-
h264 : Mark previous field as done before throwing it away.
11 février 2012, par Michael Niedermayerh264 : Mark previous field as done before throwing it away.