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    Modification lors de l’ajout d’un média
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Sur d’autres sites (9349)

  • ffmpeg conversion skips audio

    10 mars 2012, par user504879

    While converting a video to mp4 format using ffmpeg the audio gets skipped because of which the audio goes out of sync with the Video.

    One can have a look at the following Video :
    https://vialogues.com/vialogues/play/486

    I am using the following options for conversion

    /usr/local/bin/ffmpeg -y -i $inputfile -acodec libfaac -ar 44100 -ab 96k -vcodec libx264 -level 41 -bufsize 20000k -maxrate 25000k -g 250 -r 20 -s 480x270 -coder 1 -flags +loop -cmp +chroma -partitions +parti4x4+partp8x8+partb8x8 -flags2 +dct8x8+bpyramid -me_method umh -subq 7 -me_range 16 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -rc_eq 'blurCplx^(1-qComp)' -bf 16 -b_strategy 1 -bidir_refine 1 -refs 6 -crf 25 -deblockalpha 0 -vpre medium -deblockbeta 0 $outputfile

    Also the ffmpeg version is

    ffmpeg
    
FFmpeg version 0.6.1, Copyright (c) 2000-2010 the FFmpeg developers
    
  built on Feb 19 2011 19:03:56 with gcc 4.4.5
    
  configuration: --enable-gpl --enable-version3 --enable-nonfree --enable-postproc --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxvid --enable-x11grab
    
  libavutil     50.15. 1 / 50.15. 1
    
  libavcodec    52.72. 2 / 52.72. 2
    
  libavformat   52.64. 2 / 52.64. 2
    
  libavdevice   52. 2. 0 / 52. 2. 0
    
  libswscale     0.11. 0 /  0.11. 0
    
  libpostproc   51. 2. 0 / 51. 2. 0
    
Hyper fast Audio and Video encoder

    Any ideas as to why this would be happening ?

  • Revision 2bd6fe08f8 : Enable early termination in rd search This commit allows encoder to detect the

    3 juillet 2013, par Jingning Han

    Changed Paths :
     Modify /vp9/encoder/vp9_rdopt.c



    Enable early termination in rd search

    This commit allows encoder to detect the cumulative rate-distortion
    cost per transformed block inside a partition. If the cumulative
    rd cost is already above the best rd value, it terminates the rest
    operations and continue to next prediction mode test.

    It reduces the runtime of bus at target bit-rate 2000 from 308 second
    to 266 second, i.e., about 13% speed-up at no performance penalty.

    Change-Id : I5f15a3d8955d97031d5653006027866a00654e7a

  • Add 2 pictures to video with durations ? [duplicate]

    24 juin 2013, par jesper

    This question already has an answer here :

    I am trying to add 2 different images into a video with ffmpeg.

    image1.jpg should show the first 10 seconds of the movie and youtubeLOL.png should show the next 6 minutes of the video.

    So the command should tell us also to repeat the pictures to get a length for 6 minutes and 10 seconds. How can i do this ? I have tried this :

    (It's not even working)

     passthru("ffmpeg -f image2 -loop 1 -vframes 100 -i /home/psafari/public_html/youtube_images/movie_" . $id . ".jpg -vcodec mpeg4 /home/psafari/public_html/youtube_videos/movie_" . time().".avi");

    Here is output :

    FFmpeg version 0.6.5, Copyright (c) 2000-2010 the FFmpeg developers built on Jan 29 2012 17:52:15 with gcc 4.4.5 20110214 (Red Hat 4.4.5-6) configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/share/man --incdir=/usr/include --disable-avisynth --extra-cflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -fPIC' --enable-avfilter --enable-avfilter-lavf --enable-libdc1394 --enable-libdirac --enable-libfaac --enable-libfaad --enable-libfaadbin --enable-libgsm --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libx264 --enable-gpl --enable-nonfree --enable-postproc --enable-pthreads --enable-shared --enable-swscale --enable-vdpau --enable-version3 --enable-x11grab libavutil 50.15. 1 / 50.15. 1 libavcodec 52.72. 2 / 52.72. 2 libavformat 52.64. 2 / 52.64. 2 libavdevice 52. 2. 0 / 52. 2. 0 libavfilter 1.19. 0 / 1.19. 0 libswscale 0.11. 0 / 0.11. 0 libpostproc 51. 2. 0 / 51. 2. 0 
    

    
Invalid value '1' for option 'loop'

    output memcode

     MEncoder SVN-r31628-4.4.6 (C) 2000-2010 MPlayer Team
    
 get_path("config") problem
    
 success: format: 0  data: 0x0 - 0x1251b
    
 libavformat file format detected.
    
 [lavf] stream 0: video (h264), -vid 0
    
 VIDEO:  [H264]  540x800  24bpp  25.000 fps  116.3 kbps (14.2 kbyte/s)
    
 [V] filefmt:44  fourcc:0x34363248  size:540x800  fps:25.000  ftime:=0.0400
    
 videocodec: framecopy (540x800 24bpp fourcc=34363248)
    
 Writing header...
    
 ODML: Aspect information not (yet?) available or unspecified, not writing vprp header.
    
 Writing header...
    
 ODML: Aspect information not (yet?) available or unspecified, not writing vprp header.
    
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 Pos:   4.9s    123f (100%)  0.00fps Trem:   0min   0mb  A-V:0.000 [118:0]
    
 Pos:   5.0s    124f (100%)  0.00fps Trem:   0min   0mb  A-V:0.000 [117:0]
    
 Pos:   5.0s    125f (100%)  0.00fps Trem:   0min   0mb  A-V:0.000 [116:0]
    
 success: format: 0  data: 0x0 - 0x9daf8
    
 libavformat file format detected.
    
 [lavf] stream 0: video (h264), -vid 0
    
 VIDEO:  [H264]  640x400  24bpp  25.000 fps   21.8 kbps ( 2.7 kbyte/s)
    
 [V] filefmt:44  fourcc:0x34363248  size:640x400  fps:25.000  ftime:=0.0400
    
 videocodec: framecopy (540x800 24bpp fourcc=34363248)
    
 videocodec: framecopy (640x400 24bpp fourcc=34363248)
    

    
 All video files must have identical fps, resolution, and codec for -ovc copy.
    

    
 Exiting...

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