Recherche avancée

Sur d’autres sites (5785)

• FFMPEG-jpg sequence to H.264 generate best result

  18 octobre 2015, par Ziki

  I have a jpg sequence which I need to convert to mp4, and I need to get the best result.

  As I understood, I need to supply the ’ffmpeg’ cmdln the following : bitrate, minrate, maxrate and bufsize.

  The only thing that I found about calculating the above params, is if I have the final output file size. But considering I want the best quality, I don’t know the final output file size, and I don’t care what it will be.

  Of course I have the framerate and the total frames.

  Here’s my ffmpeg cmdln :

  ffmpeg 
  
  -r 24 
  
  -start_number 0 
  
  -i "C:\pathToSequence\%06d.jpg" 
  
  -c copy 
  
  -vframes 792 
  
  -threads 16 
  
  -pix_fmt yuv420p 
  
  -c:v libx264 
  
  "C:\pathToOutput\result.mp4"

  The total size of the sequence is 128MB, 792 frames, 24 framerate, resolution 1280x720.

  Until now I used to add the following to the ffmpeg cmdln :

  -b:v 10000k -minrate 10000k -maxrate 10000k -bufsize 10000k

  And if it was 1080p :

  -b:v 20000k -minrate 20000k -maxrate 20000k -bufsize 20000k

  And I figured that if I put the max value that ffmpeg can handle (2147480) it will generate almost the same result as the above. But I think it’s a bad approach(correct me if I’m wrong).

  So if I need to get the best result, how do I calculate it(or I can simply put the max value) ?

  Also I would like if you have another helpful flags to add to make the best final result.

  —EDIT—

  Here’s the updated command :

  O:\tools\ffmpeg -framerate 24 -start_number 0 -i "C:\share\localProcess\test\%05d.jpg" -vframes 54 -pix_fmt yuv420p -c:v libx264 -preset veryslow -qp 1 "C:\share\localProcess\result\result.mp4"

  And this is the ouptout :

  ffmpeg version N-72383-g7206b94 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 4.9.2 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmfx --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib
  
    libavutil      54. 26.100 / 54. 26.100
  
    libavcodec     56. 41.100 / 56. 41.100
  
    libavformat    56. 33.101 / 56. 33.101
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 16.101 /  5. 16.101
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Input #0, image2, from 'C:\share\localProcess\test\%05d.jpg':
  
    Duration: 00:00:02.25, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 1280x720 [SAR 72:72 DAR 16:9], 24 fps, 24 tbr, 24 tbn, 24 tbc
  
  [swscaler @ 0000000004d6bf60] deprecated pixel format used, make sure you did set range correctly
  
  [libx264 @ 0000000004d7a9e0] using SAR=1/1
  
  [libx264 @ 0000000004d7a9e0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
  
  [libx264 @ 0000000004d7a9e0] profile High, level 5.0
  
  [libx264 @ 0000000004d7a9e0] 264 - core 146 r2538 121396c - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 ref=16 deblock=1:0:0 analyse=0x3:0x133 me=umh subme=9 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=12 lookahead_threads=2 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=24 scenecut=40 intra_refresh=0 rc=cqp mbtree=0 qp=1 ip_ratio=1.40 pb_ratio=1.30 aq=0
  
  Output #0, mp4, to 'C:\share\localProcess\result\result.mp4':
  
    Metadata:
  
      encoder         : Lavf56.33.101
  
      Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 24 fps, 12288 tbn, 24 tbc
  
      Metadata:
  
        encoder         : Lavc56.41.100 libx264
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
  
  Press [q] to stop, [?] for help
  
  frame=   54 fps= 38 q=-1.0 Lsize=     542kB time=00:00:02.16 bitrate=2050.0kbits/s
  
  video:541kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.251171%
  
  [libx264 @ 0000000004d7a9e0] frame I:1     Avg QP: 0.00  size: 23629
  
  [libx264 @ 0000000004d7a9e0] frame P:22    Avg QP: 1.00  size: 16146
  
  [libx264 @ 0000000004d7a9e0] frame B:31    Avg QP: 2.81  size:  5623
  
  [libx264 @ 0000000004d7a9e0] consecutive B-frames: 16.7% 29.6% 16.7%  0.0%  9.3%  0.0% 13.0% 14.8%  0.0%
  
  [libx264 @ 0000000004d7a9e0] mb I  I16..4: 74.9% 20.2%  4.9%
  
  [libx264 @ 0000000004d7a9e0] mb P  I16..4:  0.3%  0.1%  1.2%  P16..4:  2.7%  0.4%  0.8%  0.2%  0.1%    skip:94.2%
  
  [libx264 @ 0000000004d7a9e0] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  3.0%  0.4%  0.5%  direct: 0.3%  skip:95.7%  L0:56.0% L1:40.5% BI: 3.5%
  
  [libx264 @ 0000000004d7a9e0] 8x8 transform intra:16.5% inter:18.4%
  
  [libx264 @ 0000000004d7a9e0] direct mvs  spatial:54.8% temporal:45.2%
  
  [libx264 @ 0000000004d7a9e0] coded y,uvDC,uvAC intra: 33.9% 49.8% 49.5% inter: 1.3% 2.9% 2.9%
  
  [libx264 @ 0000000004d7a9e0] i16 v,h,dc,p: 79% 13%  4%  4%
  
  [libx264 @ 0000000004d7a9e0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 12% 22% 48%  2%  4%  6%  3%  1%  2%
  
  [libx264 @ 0000000004d7a9e0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 13% 13% 43%  5%  6%  4%  5%  5%  6%
  
  [libx264 @ 0000000004d7a9e0] i8c dc,h,v,p: 78% 12%  7%  3%
  
  [libx264 @ 0000000004d7a9e0] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 0000000004d7a9e0] ref P L0: 65.7%  2.4%  8.9%  4.5%  2.3%  3.0%  2.8%  3.9%  3.5%  0.8%  0.3%  0.5%  0.3%  0.5%  0.2%  0.3%
  
  [libx264 @ 0000000004d7a9e0] ref B L0: 76.9% 12.0%  3.4%  0.7%  3.6%  0.5%  2.1%  0.4%  0.1%  0.0%  0.1%  0.0%  0.1%  0.1%
  
  [libx264 @ 0000000004d7a9e0] ref B L1: 98.2%  1.8%
  
  [libx264 @ 0000000004d7a9e0] kb/s:1966.80

  Link to download JPG sequence.

  Link to download the result.

• 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

• ffmpeg live microphone streaming via MP3 audio

  14 décembre 2015, par nick

  Looking for a way to capture a windows PC’s default recording device and transcode it to MP3 audio and stream via UDP to a Barix box that only accepts MPEG1/MP3 audio.

  Below are 2 examples I have tried with no success. The audio is heard on the far end however it sounds choppy (approx. 95% nothing, 5% successful)

  ffmpeg -f dshow -i audio="Transmit (Plantronics C435-M)" -acodec libmp3lame -f mp2 udp ://10.100.132.47:2050
  ffmpeg -f dshow -i audio="Transmit (Plantronics C435-M)" -f mp3 udp ://10.100.132.47:2050

  Any ideas would be much appreciated.