使用webm/libvorbis編碼沒有使用ffmpeg編碼的音頻

Question

音頻編碼到webm時出現問題。嘗試了許多不同的方法，它只是不會發生。這些命令在每次傳遞之前打印在下面。

我已經嘗試過移動音頻命令，嘗試不同的比特率，不同的音頻命令，並試圖在一些不同的文件，以及兩個都有音頻。

使用x264將這些文件編碼爲MP4不會造成任何問題，並且工作得很好，並且音頻播放良好，因此這似乎是webm的問題。正如你在下面看到的那樣，它是一個2遍編碼。

感謝您提供任何幫助！

克雷格

Webm LG PASS 1........................... 




    webm_pass1: /usr/bin/ffmpeg -i /home/thedirectory/video613268.mov -codec:v libvpx -quality good -vf 'scale=640:360 [scaled];movie=/home/thedirectory/watermarks/w640X360.png [logo];[scaled][logo] overlay' -cpu-used 0 -b:v 500k -aspect 16:9 -qmin 10 -qmax 42 -maxrate:v 500k -bufsize:v 1000k -r:v 25/1 -force_fps -threads 0 -an -acodec libvorbis -ac 2 -ab 96k -ar 44100 -pass 1 -f webm -y /dev/null 



    ffmpeg version 0.10.2 Copyright (c) 2000-2012 the FFmpeg developers 
     built on Mar 11 2013 14:48:26 with gcc 4.6.2 20111027 (Red Hat 4.6.2-2) 
     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-libfaac --enable-libgsm --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libx264 --enable-gpl --enable-nonfree --enable-postproc --enable-pthreads --enable-shared --enable-swscale --enable-vdpau --enable-version3 --enable-x11grab --enable-libvorbis --enable-libvpx 
     libavutil  51. 35.100/51. 35.100 
     libavcodec  53. 61.100/53. 61.100 
     libavformat 53. 32.100/53. 32.100 
     libavdevice 53. 4.100/53. 4.100 
     libavfilter  2. 61.100/2. 61.100 
     libswscale  2. 1.100/2. 1.100 
     libswresample 0. 6.100/0. 6.100 
     libpostproc 52. 0.100/52. 0.100 
    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/thedirectory/video613268.mov': 
     Metadata: 
     major_brand  : qt 
     minor_version : 537199360 
     compatible_brands: qt 
     creation_time : 2013-02-23 20:04:32 
     Duration: 00:00:21.02, start: 0.000000, bitrate: 114326 kb/s 
     Stream #0:0(eng): Video: mjpeg (jpeg/0x6765706A), yuvj422p, 1920x1080 [SAR 72:72 DAR 16:9], 112786 kb/s, 29.97 fps, 29.97 tbr, 2997 tbn, 2997 tbc 
     Metadata: 
      creation_time : 2013-02-23 20:04:32 
      handler_name : ?Gestionnaire d?alias Apple 
     Stream #0:1(eng): Audio: pcm_s16be (twos/0x736F7774), 48000 Hz, 2 channels, s16, 1536 kb/s 
     Metadata: 
      creation_time : 2013-02-23 20:04:32 
      handler_name : ?Gestionnaire d?alias Apple 
    Incompatible pixel format 'yuvj422p' for codec 'libvpx', auto-selecting format 'yuv420p' 
    [buffer @ 0x1f675a0] w:1920 h:1080 pixfmt:yuvj422p tb:1/1000000 sar:1/1 sws_param: 
    [movie @ 0x1f799c0] seek_point:0 format_name:(null) file_name:/home/thedirectory/watermarks/w640X360.png stream_index:0 
    [overlay @ 0x1f7c2c0] auto-inserting filter 'auto-inserted scale 0' between the filter 'Parsed_movie_1' and the filter 'Parsed_overlay_2' 
    [scale @ 0x1f78d40] w:1920 h:1080 fmt:yuvj422p -> w:640 h:360 fmt:yuv420p flags:0x4 
    [scale @ 0x1f7cde0] w:640 h:360 fmt:rgba -> w:640 h:360 fmt:yuva420p flags:0x4 
    [overlay @ 0x1f7c2c0] main w:640 h:360 fmt:yuv420p overlay x:0 y:0 w:640 h:360 fmt:yuva420p 
    [overlay @ 0x1f7c2c0] main_tb:1/1000000 overlay_tb:1/25 -> tb:1/1000000 exact:1 
    [libvpx @ 0x1f77ce0] v1.0.0 
    Output #0, webm, to '/dev/null': 
     Metadata: 
     major_brand  : qt 
     minor_version : 537199360 
     compatible_brands: qt 
     creation_time : 2013-02-23 20:04:32 
     encoder   : Lavf53.32.100 
     Stream #0:0(eng): Video: vp8, yuv420p, 640x360 [SAR 1:1 DAR 16:9], q=10-42, pass 1, 500 kb/s, 1k tbn, 25 tbc 
     Metadata: 
      creation_time : 2013-02-23 20:04:32 
      handler_name : ?Gestionnaire d?alias Apple 
    Stream mapping: 
     Stream #0:0 -> #0:0 (mjpeg -> libvpx) 
    Press [q] to stop, [?] for help 
    frame= 527 fps= 21 q=0.0 Lsize=  0kB time=00:00:00.00 bitrate= 0.0kbits/s dup=0 drop=103  
    video:0kB audio:0kB global headers:0kB muxing overhead -nan% 
    Output file is empty, nothing was encoded (check -ss/-t/-frames parameters if used) 
    Webm LG PASS 2....................... 




    webm_pass2: /usr/bin/ffmpeg -i /home/thedirectory/video613268.mov -codec:v libvpx -quality good -vf 'scale=640:360 [scaled];movie=/home/thedirectory/watermarks/w640X360.png [logo];[scaled][logo] overlay' -cpu-used 0 -b:v 500k -aspect 16:9 -qmin 10 -qmax 42 -maxrate:v 500k -bufsize:v 1000k -r:v 24/1 -force_fps -threads 0 -an -acodec libvorbis -ac 2 -ab 96k -ar 44100 -pass 2 -f webm -y /media/amazons3/webmlg/video613268.mov.webm 



    ffmpeg version 0.10.2 Copyright (c) 2000-2012 the FFmpeg developers 
     built on Mar 11 2013 14:48:26 with gcc 4.6.2 20111027 (Red Hat 4.6.2-2) 
     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-libfaac --enable-libgsm --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libx264 --enable-gpl --enable-nonfree --enable-postproc --enable-pthreads --enable-shared --enable-swscale --enable-vdpau --enable-version3 --enable-x11grab --enable-libvorbis --enable-libvpx 
     libavutil  51. 35.100/51. 35.100 
     libavcodec  53. 61.100/53. 61.100 
     libavformat 53. 32.100/53. 32.100 
     libavdevice 53. 4.100/53. 4.100 
     libavfilter  2. 61.100/2. 61.100 
     libswscale  2. 1.100/2. 1.100 
     libswresample 0. 6.100/0. 6.100 
     libpostproc 52. 0.100/52. 0.100 
    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/thedirectory/video613268.mov': 
     Metadata: 
     major_brand  : qt 
     minor_version : 537199360 
     compatible_brands: qt 
     creation_time : 2013-02-23 20:04:32 
     Duration: 00:00:21.02, start: 0.000000, bitrate: 114326 kb/s 
     Stream #0:0(eng): Video: mjpeg (jpeg/0x6765706A), yuvj422p, 1920x1080 [SAR 72:72 DAR 16:9], 112786 kb/s, 29.97 fps, 29.97 tbr, 2997 tbn, 2997 tbc 
     Metadata: 
      creation_time : 2013-02-23 20:04:32 
      handler_name : ?Gestionnaire d?alias Apple 
     Stream #0:1(eng): Audio: pcm_s16be (twos/0x736F7774), 48000 Hz, 2 channels, s16, 1536 kb/s 
     Metadata: 
      creation_time : 2013-02-23 20:04:32 
      handler_name : ?Gestionnaire d?alias Apple 
    Incompatible pixel format 'yuvj422p' for codec 'libvpx', auto-selecting format 'yuv420p' 
    [buffer @ 0x1f2a5a0] w:1920 h:1080 pixfmt:yuvj422p tb:1/1000000 sar:1/1 sws_param: 
    [movie @ 0x1f3bec0] seek_point:0 format_name:(null) file_name:/home/thedirectory/watermarks/w640X360.png stream_index:0 
    [overlay @ 0x1f3f2c0] auto-inserting filter 'auto-inserted scale 0' between the filter 'Parsed_movie_1' and the filter 'Parsed_overlay_2' 
    [scale @ 0x1f3c8a0] w:1920 h:1080 fmt:yuvj422p -> w:640 h:360 fmt:yuv420p flags:0x4 
    [scale @ 0x1f3fde0] w:640 h:360 fmt:rgba -> w:640 h:360 fmt:yuva420p flags:0x4 
    [overlay @ 0x1f3f2c0] main w:640 h:360 fmt:yuv420p overlay x:0 y:0 w:640 h:360 fmt:yuva420p 
    [overlay @ 0x1f3f2c0] main_tb:1/1000000 overlay_tb:1/25 -> tb:1/1000000 exact:1 
    [libvpx @ 0x1f3ace0] v1.0.0 
    Output #0, webm, to '/media/amazons3/webmlg/video613268.mov.webm': 
     Metadata: 
     major_brand  : qt 
     minor_version : 537199360 
     compatible_brands: qt 
     creation_time : 2013-02-23 20:04:32 
     encoder   : Lavf53.32.100 
     Stream #0:0(eng): Video: vp8, yuv420p, 640x360 [SAR 1:1 DAR 16:9], q=10-42, pass 2, 500 kb/s, 1k tbn, 24 tbc 
     Metadata: 
      creation_time : 2013-02-23 20:04:32 
      handler_name : ?Gestionnaire d?alias Apple 
    Stream mapping: 
     Stream #0:0 -> #0:0 (mjpeg -> libvpx) 
    Press [q] to stop, [?] for help 
    frame= 506 fps= 7 q=0.0 Lsize= 1610kB time=00:00:21.08 bitrate= 625.8kbits/s dup=0 drop=124  
    video:1389kB audio:0kB global headers:0kB muxing overhead 15.952140% 

Answer 1

的-an option被用於產生輸出與沒有聲音。如果您想要音頻，請刪除此選項。