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• ffmpeg generating out of sync audio/video file

  2 mars 2013, par marcelorocks

  I am trying to convert a flv video to mp4 using a264, but the result video has a out of sync audio/video. Audio seems ok but video seems slow and therefore out of sync. I am a newbie on video conversion so any help is appreciated.

  Here is the command I am running :

  /opt/local/bin/ffmpeg -i complaint.flv -f mp4 -vcodec libx264 -acodec aac -copyts -strict experimental -fpre /opt/local/share/ffmpeg/libx264-lossless_slow.ffpreset -ab 44k -threads 0 -crf 23 complaint.mp4

  And the printout :

  Desktop  /opt/local/bin/ffmpeg -i complaint.flv -f mp4 -vcodec libx264 -acodec aac -copyts -strict experimental -fpre /opt/local/share/ffmpeg/libx264-lossless_slow.ffpreset -ab 44k -threads 0 -crf 23 complaint.mp4
  
  ffmpeg version 0.7.8, Copyright (c) 2000-2011 the FFmpeg developers
  
    built on Jan 12 2012 21:12:26 with gcc 4.2.1 (Apple Inc. build 5666) (dot 3)
  
    configuration: --prefix=/opt/local --enable-gpl --enable-postproc --enable-swscale --enable-avfilter --enable-libmp3lame --enable-libvorbis --enable-libtheora --enable-libdirac --enable-libschroedinger --enable-libopenjpeg --enable-libxvid --enable-libx264 --enable-libvpx --enable-libspeex --mandir=/opt/local/share/man --enable-shared --enable-pthreads --cc=/usr/bin/gcc-4.2 --arch=x86_64 --enable-yasm
  
    libavutil    50. 43. 0 / 50. 43. 0
  
    libavcodec   52.123. 0 / 52.123. 0
  
    libavformat  52.111. 0 / 52.111. 0
  
    libavdevice  52.  5. 0 / 52.  5. 0
  
    libavfilter   1. 80. 0 /  1. 80. 0
  
    libswscale    0. 14. 1 /  0. 14. 1
  
    libpostproc  51.  2. 0 / 51.  2. 0
  
  [flv @ 0x7fe57a04ac00] Estimating duration from bitrate, this may be inaccurate
  
  Input #0, flv, from 'complaint.flv':
  
    Metadata:
  
      duration        : 7
  
      creationdate    : Thu Jan 12 23:47:24
  
      description     : Recorded using VideoRecording example.
  
    Duration: 00:00:06.61, start: 0.000000, bitrate: N/A
  
      Stream #0.0: Video: flv, yuv420p, 288x288, 1k tbr, 1k tbn, 1k tbc
  
      Stream #0.1: Audio: nellymoser, 11025 Hz, mono, s16
  
  File 'complaint.mp4' already exists. Overwrite ? [y/N] y
  
  [buffer @ 0x7fe579c32cc0] w:288 h:288 pixfmt:yuv420p tb:1/1000000 sar:0/1 sws_param:
  
  [libx264 @ 0x7fe57a044600] using cpu capabilities: none!
  
  [libx264 @ 0x7fe57a044600] profile High, level 4.2
  
  [libx264 @ 0x7fe57a044600] 264 - core 118 - H.264/MPEG-4 AVC codec - Copyleft 2003-2011 - http://www.videolan.org/x264.html - options: cabac=1 ref=2 deblock=1:0:0 analyse=0x3:0x33 me=umh subme=6 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.41 aq=1:1.00
  
  Output #0, mp4, to 'complaint.mp4':
  
    Metadata:
  
      duration        : 7
  
      creationdate    : Thu Jan 12 23:47:24
  
      description     : Recorded using VideoRecording example.
  
      encoder         : Lavf52.111.0
  
      Stream #0.0: Video: libx264, yuv420p, 288x288, q=0-69, 200 kb/s, 1k tbn, 1k tbc
  
      Stream #0.1: Audio: aac, 11025 Hz, mono, s16, 44 kb/s
  
  Stream mapping:
  
    Stream #0.0 -> #0.0
  
    Stream #0.1 -> #0.1
  
  Press [q] to stop, [?] for help
  
  frame= 6557 fps=106 q=-1.0 Lsize=     685kB time=00:00:03.62 bitrate=1549.1kbits/s dup=6367 drop=0    
  
  video:615kB audio:17kB global headers:0kB muxing overhead 8.361360%
  
  frame I:27    Avg QP:19.98  size:  8242
  
  [libx264 @ 0x7fe57a044600] frame P:6530  Avg QP:30.71  size:    62
  
  [libx264 @ 0x7fe57a044600] mb I  I16..4: 11.1% 79.3%  9.6%
  
  [libx264 @ 0x7fe57a044600] mb P  I16..4:  0.1%  0.2%  0.0%  P16..4:  1.2%  0.2%  0.3%  0.0%  0.0%    skip:98.0%
  
  [libx264 @ 0x7fe57a044600] 8x8 transform intra:77.8% inter:64.9%
  
  [libx264 @ 0x7fe57a044600] coded y,uvDC,uvAC intra: 75.3% 81.3% 33.3% inter: 0.5% 0.7% 0.1%
  
  [libx264 @ 0x7fe57a044600] i16 v,h,dc,p: 78%  9% 10%  3%
  
  [libx264 @ 0x7fe57a044600] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 35% 11% 32%  3%  4%  5%  2%  5%  4%
  
  [libx264 @ 0x7fe57a044600] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 56%  7%  9%  3%  4%  7%  3%  7%  3%
  
  [libx264 @ 0x7fe57a044600] i8c dc,h,v,p: 45% 15% 34%  6%
  
  [libx264 @ 0x7fe57a044600] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 0x7fe57a044600] ref P L0: 80.5%  9.5% 10.0%
  
  [libx264 @ 0x7fe57a044600] kb/s:767.20

• Merge filename.mp4.tmp with filename.mp4

  10 janvier 2017, par Sathish

  How to merge a abc.mp4.tmp swap file with actual abc.mp4 file. I was trying to recording a live event using Wowza Media server 3.6 and the recorded file was not muxed properly at final moment. The abc.mp4.tmp swap file was not merged with actual abc.mp4 file. So could someone tell me how to merge the abc.mp4.tmp and abc.mp4 file and creates a new file and I can able to play with vlc

  Here is the mediainfo of the files

  [root@ip-ss-21-98-2 content]# mediainfo 03_03_2014_12_03_08.mp4
  
  General
  
  Complete name                            : 03_03_2014_12_03_08.mp4
  
  Format                                   : MPEG-4
  
  Format profile                           : Adobe Flash
  
  Codec ID                                 : f4v 
  
  File size                                : 5.20 GiB
  
  
  
  
  
  [root@ip-ss-21-98-2 content]# mediainfo 03_03_2014_12_03_08.mp4.tmp
  
  General
  
  Complete name                            : 03_03_2014_12_03_08.mp4.tmp
  
  File size                                : 38.3 MiB

• Revision ebb583d291 : Add a test vector for loopfilter The test vector exercises the loopfilter behav

  4 décembre 2013, par Jingning Han

  Changed Paths :
   Modify /test/test.mk

  
   Modify /test/test_vector_test.cc

  
  
  Add a test vector for loopfilter

  The test vector exercises the loopfilter behavior at frame boundary.

  blue_sky_1080p25.y4m —good —cpu-used=2 —threads=0 —profile=0
  — lag-in-frames=25 —limit=300 —min-q=0 —max-q=63 —cq-level=20
  — end-usage=0 —auto-alt-ref=1 -p 2 —kf-max-dist=9999 —kf-min-dist=0
  — drop-frame=0 —static-thresh=0 —bias-pct=50 —minsection-pct=0
  — maxsection-pct=2000 —arnr-maxframes=7 —arnr-strength=5
  — arnr-type=3 —sharpness=0 —undershoot-pct=100 —target-bitrate=6000

  Change-Id : Ibd0807395d2fe87f24f81f990369678df3de7c23