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• After ffmpeg encode, AVPacket pts and dts is AV_NOPTS_VALUE

  29 novembre 2017, par Li Zehan

  I would like to ask a question about ffmpeg when i use encoder (x264).

  this is my code :

  int
  
  FFVideoEncoder::init(AVCodecID codecId, int bitrate, int fps, int gopSize,
  
                       int width, int height, AVPixelFormat format) {
  
      release();
  
  
  
      const AVCodec *codec = avcodec_find_encoder(codecId);
  
      m_pCodecCtx = avcodec_alloc_context3(codec);
  
      m_pCodecCtx->width = width;
  
      m_pCodecCtx->height = height;
  
      m_pCodecCtx->pix_fmt = format;
  
      m_pCodecCtx->bit_rate = bitrate;
  
      m_pCodecCtx->thread_count = 5;
  
      m_pCodecCtx->max_b_frames = 0;
  
      m_pCodecCtx->gop_size = gopSize;
  
  
  
      m_pCodecCtx->time_base.num = 1;
  
      m_pCodecCtx->time_base.den = fps;
  
  
  
      //H.264
  
      if (m_pCodecCtx->codec_id == AV_CODEC_ID_H264) {
  
  //        av_dict_set(&opts, "preset", "slow", 0);
  
          av_dict_set(&m_pEncoderOpts, "preset", "superfast", 0);
  
          av_dict_set(&m_pEncoderOpts, "tune", "zerolatency", 0);
  
  
  
          m_pCodecCtx->flags |= CODEC_FLAG_GLOBAL_HEADER;
  
          m_pCodecCtx->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
  
      }
  
      int ret = avcodec_open2(m_pCodecCtx, m_pCodecCtx->codec, &m_pEncoderOpts);
  
      if (ret == 0) {
  
          LOGI("open avcodec success!");
  
      } else {
  
          LOGE("open avcodec error!");
  
          return -1;
  
      }
  
      return ret;
  
  }
  
  
  
  int FFVideoEncoder::encode(const Frame &inFrame, AVPacket *outPacket) {
  
      AVFrame *frame = av_frame_alloc();
  
  //    avpicture_fill((AVPicture *) frame, inFrame.getData(), AV_PIX_FMT_YUV420P, inFrame.getWidth(),
  
  //                   inFrame.getHeight());
  
      av_image_fill_arrays(frame->data, frame->linesize, inFrame.getData(), m_pCodecCtx->pix_fmt,
  
                           inFrame.getWidth(), inFrame.getHeight(), 1);
  
  
  
      int ret = 0;
  
      ret = avcodec_send_frame(m_pCodecCtx, frame);
  
      if (ret != 0) {
  
          LOGE("send frame error! %s", av_err2str(ret));
  
      } else {
  
          ret = avcodec_receive_packet(m_pCodecCtx, outPacket);
  
          LOGI("extract data size = %d", m_pCodecCtx->extradata_size);
  
          if (ret != 0) {
  
              LOGE("receive packet error! %s", av_err2str(ret));
  
          }
  
      };
  
      av_frame_free(&frame);
  
      return ret;
  
  }

  I expect that the AVPacket will carry the pts and dts about this frame.

  but in fact, i only can get encoded frame data and size.

  //====================================

  except this question, i have another quesiont :

  x264 docs say that "tune" opts can be set like film、animation and others. but i only can get a normal video when i set "zerolatency" params. When i set others opts, video’s bitrate is very low.

  Thanks your answer.

• FFMPEG Take 1 second clips each video file from a directory of files, and until total playtime reached

  3 février 2021, par Matthew

  I'm working on a music art video project for a song.

  


  I have a directory that contains approximately 400 individual videos

  


  

  • varying lengths (as short as 3 seconds and as long as 31 minutes)

  


  • varying file types (mp4 and webm)

  


  • varying resolutions/framerates/bitrates

  


  


  The output video should consist of :

  


  

  • 1 second chunks of each video

  


  • in round-robin fashion

  


  • until all videos are played fully or the output total video length reaches a certain limit (example, 20 minutes).

  


  • Output video should be 1280×720 at 24fps, with no preference to bitrate.

  


  • Videos that are larger should be scaled down and letterboxed (vertically or horizontally).

  


  • Audio is not important at all. The video can be silent. I can overlay audio separately.

  


  


  I do not want to loop short videos. In the example below, you can see that, for top-left-view-take-1.mp4, each 'clip' that's taken is incrementally further into the video. In other words, it shouldn't take the same 1 second clip from the beginning. The goal is to get further in to each individual video as the output video progresses.

  


  For example, say my directory contains files such as the following (and, for the example here, we'll say that this is all files in the directory) :

  


  overhead-view-take-1.mp4 (3 seconds, for the sake of the question)
top-right-view-take-1.mp4 (3 seconds, for the sake of the question)
top-right-view-take-2.mp4 (5 seconds, for the sake of the question)
outside-kaleidoscope-1.mp4
yellow-kaleidoscope-1.mp4
red-kaleidoscope-1.mp4
brake-lights-slow-1.mp4
soft-city-lights.webm


  


  Assume anything that isn't marked with a video duration is at least 5 seconds long.

  


  Based on the above files & times, here would be the order and time code of each clip during the first 30 seconds of the output video :

  


  Based on each video's total duration, the output video should include 1 second clips from all videos in the directory.

  


  





  


  


  


  


  


  



  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  Output time	Clip time	Clip file
  00:00-00:01	00:00-00:01	overhead-view-take-1.mp4
  00:01-00:02	00:00-00:01	top-right-view-take-1.mp4
  00:02-00:03	00:00-00:01	top-right-view-take-2.mp4
  00:03-00:04	00:00-00:01	outside-kaleidoscope-1.mp4
  00:04-00:05	00:00-00:01	yellow-kaleidoscope-1.mp4
  00:05-00:06	00:00-00:01	red-kaleidoscope-1.mp4
  00:06-00:07	00:00-00:01	brake-lights-slow-1.mp4
  00:07-00:08	00:00-00:01	soft-city-lights.webm
  00:08-00:09	00:01-00:02	overhead-view-take-1.mp4
  00:09-00:10	00:01-00:02	top-right-view-take-1.mp4
  00:10-00:11	00:01-00:02	top-right-view-take-2.mp4
  00:11-00:12	00:01-00:02	outside-kaleidoscope-1.mp4
  00:12-00:13	00:01-00:02	yellow-kaleidoscope-1.mp4
  00:13-00:14	00:01-00:02	red-kaleidoscope-1.mp4
  00:14-00:15	00:01-00:02	brake-lights-slow-1.mp4
  00:15-00:16	00:01-00:02	soft-city-lights.webm
  00:16-00:17	00:02-00:03	overhead-view-take-1.mp4
  00:17-00:18	00:02-00:03	top-right-view-take-1.mp4
  00:18-00:19	00:02-00:03	top-right-view-take-2.mp4
  00:19-00:20	00:02-00:03	outside-kaleidoscope-1.mp4
  00:20-00:21	00:02-00:03	yellow-kaleidoscope-1.mp4
  00:21-00:22	00:02-00:03	red-kaleidoscope-1.mp4
  00:22-00:23	00:02-00:03	brake-lights-slow-1.mp4
  00:23-00:24	00:02-00:03	soft-city-lights.webm

  


  


  Now, the output video should include 1 second clips only from videos that still have time remaining. The videos that don't have any time remaining, such as overhead-view-take-1.mp4 and top-right-view-take-1.mp4, are not present here.

  


  





  


  


  


  


  


  



  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  


  Output time	Clip time	Clip file
  00:24-00:25	00:03-00:04	top-right-view-take-2.mp4
  00:25-00:26	00:03-00:04	outside-kaleidoscope-1.mp4
  00:26-00:27	00:03-00:04	yellow-kaleidoscope-1.mp4
  00:27-00:28	00:03-00:04	red-kaleidoscope-1.mp4
  00:28-00:29	00:03-00:04	brake-lights-slow-1.mp4
  00:29-00:30	00:03-00:04	soft-city-lights.webm

  


  


  What I've tried

  


  

  • I've read through the docs and cobbled together some code that produces output, but it only seems to work with images ; I can't get the same thing to work with videos (specifically the incremental chunks).

  


  • I've tried manipulating commands meant to `create a snapshot every x seconds/frames' but I've hit dead ends there.

  


  • I've also started trying to create a text file to run the input from. That's the point where I thought it would make sense to ask here.

  


  


  My main issue is picking off incremental chunks of individual videos, and playing those in sequence.

  


  Thoughts ?

  


  Environment details
I have access to Win, Mac, and Linux machines. So, that environment isn't as important to me. Here's ffmpeg's output :

  


  ffmpeg version 4.3.1-0york0~16.04 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.12) 20160609
  configuration: --prefix=/usr --extra-version='0york0~16.04' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libzimg --enable-pocketsphinx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
Hyper fast Audio and Video encoder


  


• Anomalie #3418 : Les tables des plugins ne s’installent pas

  9 mai 2015, par Maïeul Rouquette

  Ma config local

  PHP Version 5.2.17

  System Darwin FTSR22998 12.6.0 Darwin Kernel Version 12.6.0 : Wed Mar 18 16:23:48 PDT 2015 ; root:xnu-2050.48.19 1/RELEASE_X86_64 x86_64
  Build Date Sep 18 2013 13:58:06
  Configure Command ’./configure’ ’—with-mysql=/Applications/MAMP/Library’ ’—with-apxs2=/Applications/MAMP/Library/bin/apxs’ ’—with-gd’ ’—with-jpeg-dir=/Applications/MAMP/Library’ ’—with-png-dir=/Applications/MAMP/Library’ ’—with-zlib’ ’—with-freetype-dir=/Applications/MAMP/Library’ ’—prefix=/Applications/MAMP/bin/php/php5.2.17’ ’—exec-prefix=/Applications/MAMP/bin/php/php5.2.17’ ’—sysconfdir=/Applications/MAMP/bin/php/php5.2.17/conf’ ’—with-soap’ ’—with-config-file-path=/Applications/MAMP/bin/php/php5.2.17/conf’ ’—enable-track-vars’ ’—enable-bcmath’ ’—enable-ftp’ ’—enable-gd-native-ttf’ ’—with-bz2=/usr’ ’—with-ldap’ ’—with-mysqli=/Applications/MAMP/Library/bin/mysql_config’ ’—with-sqlite’ ’—with-ttf’ ’—with-t1lib=/Applications/MAMP/Library’ ’—enable-mbstring=all’ ’—with-curl=/Applications/MAMP/Library’ ’—enable-dbx’ ’—enable-sockets’ ’—enable-bcmath’ ’—with-imap=shared,/Applications/MAMP/Library/lib/imap-2007f’ ’—enable-soap’ ’—with-kerberos’ ’—enable-calendar’ ’—with-pgsql=shared,/Applications/MAMP/Library/pg’ ’—enable-dbase’ ’—enable-exif’ ’—with-libxml-dir=/Applications/MAMP/Library’ ’—with-gettext=shared,/Applications/MAMP/Library’ ’—with-xsl=/Applications/MAMP/Library’ ’—with-pdo-mysql=shared,/Applications/MAMP/Library’ ’—with-pdo-pgsql=shared,/Applications/MAMP/Library/pg’ ’—with-mcrypt=shared,/Applications/MAMP/Library’ ’—with-openssl’ ’—enable-zip’ ’—with-iconv=/Applications/MAMP/Library’
  Server API Apache 2.0 Handler
  Virtual Directory Support disabled
  Configuration File (php.ini) Path /Applications/MAMP/bin/php/php5.2.17/conf
  Loaded Configuration File /Applications/MAMP/bin/php/php5.2.17/conf/php.ini
  Scan this dir for additional .ini files (none)
  additional .ini files parsed (none)
  PHP API 20041225
  PHP Extension 20060613
  Zend Extension 220060519
  Debug Build no
  Thread Safety disabled
  Zend Memory Manager enabled
  IPv6 Support enabled
  Registered PHP Streams https, ftps, compress.zlib, compress.bzip2, php, file, data, http, ftp, zip
  Registered Stream Socket Transports tcp, udp, unix, udg, ssl, sslv3, sslv2, tls
  Registered Stream Filters zlib.*, bzip2.*, convert.iconv.*, string.rot13, string.toupper, string.tolower, string.strip_tags, convert.*, consumed

  Mon test
  1) spip 3.1 svn 22109
  2) pas de plugins/auto mais le flux déclaré
  3) plugin tickets mis manuellement dans plugins
  4) j’active le plugin. Il se "préactive" en entendance les dépendances
  5) lorsque j’installe saisies, le plugin tickets peut bien s’activer
  6) mais les tables n’ont pas été installées