[FFmpeg-user] The audio does not get replaced when merging flv with wav

gfmonk gary at gurudental.com
Wed Sep 10 18:48:32 CEST 2014


I have two flv videos, both of them have an audio track. I have two seperate
.wav files.

I can replace the audio on the first flv file with either of the wav files,
but I cannot replace the audio on the second flv with either audio.

The command line is...

ffmpeg -i video2.flv -i audio2.wav out.mp4

The files....

video2.flv
<http://ffmpeg-users.933282.n4.nabble.com/file/n4667279/video2.flv>  
audio2.wav
<http://ffmpeg-users.933282.n4.nabble.com/file/n4667279/audio2.wav>  

The log...

C:\ffmpeg>ffmpeg -i video2.flv -i audio2.wav out.mp4
ffmpeg version N-65557-ga8592db Copyright (c) 2000-2014 the FFmpeg
developers
  built on Aug 12 2014 22:09:32 with gcc 4.8.3 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads
--enable-av
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls
--enab
le-iconv --enable-libass --enable-libbluray --enable-libbs2b
--enable-libcaca --
enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc
--enable-lib
modplug --enable-libmp3lame --enable-libopencore-amrnb
--enable-libopencore-amrw
b --enable-libopenjpeg --enable-libopus --enable-librtmp
--enable-libschroedinge
r --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame
--en
able-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc
--enable-libvorbis
 --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264
--enable-
libx265 --enable-libxavs --enable-libxvid --enable-decklink --enable-zlib
  libavutil      54.  1.100 / 54.  1.100
  libavcodec     56.  0.100 / 56.  0.100
  libavformat    56.  0.100 / 56.  0.100
  libavdevice    56.  0.100 / 56.  0.100
  libavfilter     5.  0.100 /  5.  0.100
  libswscale      3.  0.100 /  3.  0.100
  libswresample   1.  0.100 /  1.  0.100
  libpostproc    53.  0.100 / 53.  0.100
Input #0, flv, from 'video2.flv':
  Duration: 00:00:19.28, start: 0.000000, bitrate: 268 kb/s
    Stream #0:0: Video: flv1, yuv420p, 400x300, 30 fps, 30 tbr, 1k tbn, 1k
tbc
    Stream #0:1: Audio: mp3, 11025 Hz, mono, s16p, 64 kb/s
Guessed Channel Layout for  Input Stream #1.0 : mono
Input #1, wav, from 'audio2.wav':
  Duration: 00:00:55.40, bitrate: 88 kb/s
    Stream #1:0: Audio: pcm_u8 ([1][0][0][0] / 0x0001), 11025 Hz, 1
channels, u8
, 88 kb/s
File 'out.mp4' already exists. Overwrite ? [y/N] y
[libx264 @ 000000000434d120] using cpu capabilities: MMX2 SSE2Fast SSSE3
SSE4.2
AVX
[libx264 @ 000000000434d120] profile High, level 2.1
[libx264 @ 000000000434d120] 264 - core 142 r2453 ea0ca51 - H.264/MPEG-4 AVC
cod
ec - Copyleft 2003-2014 - http://www.videolan.org/x264.html - options:
cabac=1 r
ef=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00
mixed
_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11
fast_pski
p=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0
dec
imate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3
b_pyramid=2 b
_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=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=1.40 aq=1:1.00
Output #0, mp4, to 'out.mp4':
  Metadata:
    encoder         : Lavf56.0.100
    Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p,
400x30
0, q=-1--1, 30 fps, 15360 tbn, 30 tbc
    Metadata:
      encoder         : Lavc56.0.100 libx264
    Stream #0:1: Audio: aac (libvo_aacenc) ([64][0][0][0] / 0x0040), 11025
Hz, m
ono, s16, 128 kb/s
    Metadata:
      encoder         : Lavc56.0.100 libvo_aacenc
Stream mapping:
  Stream #0:0 -> #0:0 (flv1 (flv) -> h264 (libx264))
  Stream #0:1 -> #0:1 (mp3 (native) -> aac (libvo_aacenc))
Press [q] to stop, [?] for help
frame=  308 fps=0.0 q=29.0 size=     228kB time=00:00:10.07 bitrate=
185.8kbits/
frame=  570 fps=533 q=-1.0 Lsize=     510kB time=00:00:19.35 bitrate=
215.8kbits
/s
video:462kB audio:38kB subtitle:0kB other streams:0kB global headers:0kB
muxing
overhead: 2.007406%
[libx264 @ 000000000434d120] frame I:4     Avg QP:21.49  size:  5234
[libx264 @ 000000000434d120] frame P:300   Avg QP:21.27  size:  1455
[libx264 @ 000000000434d120] frame B:266   Avg QP:24.52  size:    56
[libx264 @ 000000000434d120] consecutive B-frames: 37.5%  0.0%  2.1% 60.4%
[libx264 @ 000000000434d120] mb I  I16..4: 25.2% 72.3%  2.5%
[libx264 @ 000000000434d120] mb P  I16..4:  2.3%  5.7%  0.1%  P16..4: 29.3% 
5.2
%  2.6%  0.0%  0.0%    skip:54.8%
[libx264 @ 000000000434d120] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  9.5% 
0.1
%  0.0%  direct: 0.0%  skip:90.4%  L0:45.2% L1:54.2% BI: 0.6%
[libx264 @ 000000000434d120] 8x8 transform intra:70.9% inter:88.1%
[libx264 @ 000000000434d120] coded y,uvDC,uvAC intra: 54.0% 73.0% 23.6%
inter: 6
.8% 9.6% 1.7%
[libx264 @ 000000000434d120] i16 v,h,dc,p: 29% 30% 22% 19%
[libx264 @ 000000000434d120] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 20% 21% 40%  4% 
3%
 3%  3%  4%  4%
[libx264 @ 000000000434d120] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 31% 18% 17%  4% 
9%
 7%  7%  4%  3%
[libx264 @ 000000000434d120] i8c dc,h,v,p: 44% 26% 24%  7%
[libx264 @ 000000000434d120] Weighted P-Frames: Y:1.7% UV:1.7%
[libx264 @ 000000000434d120] ref P L0: 78.0% 11.3%  7.9%  2.7%  0.0%
[libx264 @ 000000000434d120] ref B L0: 83.7% 13.2%  3.0%
[libx264 @ 000000000434d120] ref B L1: 89.6% 10.4%
[libx264 @ 000000000434d120] kb/s:198.89

Thank you,
Gary



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