[MEncoder-users] Best and fastest way to extract audio from a dv-file

[Grozdan]

On Sat, Jun 26, 2010 at 12:27 AM, Al Bogner
<mencoder at ml093.pinguin.uni.cc> wrote:
> Am Fri, 25 Jun 2010 23:12:19 +0200
> schrieb Grozdan <neutrino8 at gmail.com>:
>
> Hi,
>
>> On Fri, Jun 25, 2010 at 11:04 PM, Al Bogner
>> <mencoder at ml093.pinguin.uni.cc> wrote:
>> > I have dv-files (raw) from a camcorder and would like to have the
>> > audio only. I could get it work with ffmpeg, but not with mencoder
>> >
>> > What is similar to
>> >
>> > ffmpeg -i "$FILE" -vn -acodec copy "$FILE"".wav" &
>> >
>> > with mencoder?
>>
>> not with mencoder, but with mplayer...
>>
>> mplayer "$FILE" -vc null -vo null -ao pcm:fast:file="${FILE%.*}.wav"
>
> Your example doesn't work with MPlayer dev-SVN-r30099-4.4-openSUSE
> Linux 11.2 (x86_64)-Packman. It produces a very short noise-clip.

Send the file please ;)

>
> Audio
> ID                               : 0
> Format                           : PCM
> Codec ID                         : 1
> Codec ID/Hint                    : Microsoft
> Duration                         : 512ms
> Bit rate                         : 1 024 Kbps
> Channel(s)                       : 2 channels
> Sampling rate                    : 32.0 KHz
> Resolution                       : 16 bits
> Stream size                      : 64.0 KiB (100%)
>
>
> I played already with a similar syntax and got with
> mplayer -vo null -vc null -ao pcm:fast:waveheader "$FILE" something
> similar to your syntax, I mean a very short noise.
>
> Too many buffered pts
> Your system is too SLOW to play this!
>
> LOL, this cannot be.
> Here is the machine:
> http://www.smolts.org/client/show_all/pub_d9258482-3ac2-4448-9bd6-33e87cb9a6a5
>
>
>
> mplayer -vo null -vc dummy -ao pcm:fast:waveheader "$FILE"
> works better, but the default file audiodump.wav has to be renamed,
> which is not a big problem and the duration differs from the original,
> which is a real problem.
>
> Audio
> ID                               : 0
> Format                           : PCM
> Codec ID                         : 1
> Codec ID/Hint                    : Microsoft
> Duration                         : 4s 720ms
> Bit rate                         : 1 024 Kbps
> Channel(s)                       : 2 channels
> Sampling rate                    : 32.0 KHz
> Resolution                       : 16 bits
> Stream size                      : 590 KiB (100%)
>
>
>
> If you want the file to test, let me know. The size is 17MB.
>
>
> This is the way I create the video-file:
>
> mencoder "$FILE" -fps "$FPS" -aspect "$DAR" \
> -vf
> yadif=0,softskip,scale=1024:576,eq2=1.1,hqdn3d,unsharp=l:5x5:0.9:c:5x5:0.1
> \
> -sws 9 \
> -ovc lavc -lavcopts vcodec=ffv1 \
> -ofps "$FPS" -nosound \
> -o "$FFV1VIDEOFILE"
>
> I also don't understand why I have to have the vf-Filters in 1 line
>
>
>
>
>
>
> This is the source file:
>
> Format                           : DV
> Format_Commercial_IfAny          : DVCPRO
> File size                        : 16.8 MiB
> Duration                         : 4s 880ms
> Overall bit rate                 : 28.8 Mbps
> Recorded date                    : 2010-02-16 21:36:28
>
> Video
> Format                           : DV
> Format_Commercial_IfAny          : DVCPRO
> Duration                         : 4s 880ms
> Bit rate mode                    : Constant
> Bit rate                         : 24.4 Mbps
> Width                            : 720 pixels
> Height                           : 576 pixels
> Display aspect ratio             : 16:9
> Frame rate mode                  : Constant
> Frame rate                       : 25.000 fps
> Standard                         : PAL
> Resolution                       : 8 bits
> Colorimetry                      : 4:2:0
> Scan type                        : Interlaced
> Bits/(Pixel*Frame)               : 2.357
> Stream size                      : 14.2 MiB (85%)
> Encoding settings                : ae mode=full automatic / wb
> mode=automatic / white balance= / fcm=manual focus
>
> Audio #1
> ID                               : 0
> Format                           : PCM
> Duration                         : 4s 880ms
> Bit rate mode                    : Constant
> Bit rate                         : 768 Kbps
> Channel(s)                       : 2 channels
> Sampling rate                    : 32.0 KHz
> Resolution                       : 12 bits
> Stream size                      : 458 KiB (3%)
>
> Audio #2
> ID                               : 1
> Format                           : PCM
> Duration                         : 4s 880ms
> Bit rate mode                    : Constant
> Bit rate                         : 768 Kbps
> Channel(s)                       : 2 channels
> Sampling rate                    : 32.0 KHz
> Resolution                       : 12 bits
> Stream size                      : 458 KiB (3%)
>
>
> Al
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