batch to determine if a source have audio or not

[marcorocchini]

Hi but please be patient because I'ma ***


I wonder if, using ffprobe or mediainfo, is there a way in batch to determine if an audio source file have or not any audio.

And possible if it have one or multiple audio mono track or stereo tracks. Thanks

[Bernix]

Deleted

[Bernix]

http://skwire.dcmembers.com/fp/?page=playtime
Try it if it works for you.
But it only shows you if there is audio or not in file. And bitrate and number of channels. Nothing more.

Bernix

[marcorocchini]

thank you but seems don't load .mxf video files. And if possible I need to change a state of a variable directly inside a batch: e.g.

HasAudioOrNot=YES

HasAudioOrNot=NOT

[pandy]

for example

@ffprobe -v -8 -i "%1" -show_format -show_streams > "%~n1_format_streams.txt"

[pandy]

thank you but seems don't load .mxf video files. And if possible I need to change a state of a variable directly inside a batch: e.g.

HasAudioOrNot=YES

HasAudioOrNot=NOT

Then perhaps https://trac.ffmpeg.org/wiki/FFprobeTips ?

@ffprobe -v error -select_streams a:? -show_entries stream=codec_type,channel_layout -of default=noprint_wrappers=1:nokey=1 "%1"

Basically you searching something able to create dynamical script - perhaps you should investigate some scripting language? Python? Ruby?

[jagabo]

Why don't you look through your dozen other batch files that do something similar and modify one of them?

[Cornucopia]

That would take effort.

[jagabo]

It takes more effort to write a post asking someone to do it for you.

[DB83]

Is it some coincidence that the word 'batch' has the letters c.a.t. inside ?

[marcorocchini]

thank you pandy, your batch working and return for example:

Audio
Stereo

everytime ffprobe find any Audio stream.
But now I have do some some prooof in partucular cases in witch unfortunately ffprobe may be unsuccessful because it fails totally the audio "seen" into the source file.

For example in the case of this P2 camera source:

https://www.dropbox.com/s/lzeesqc3kpgi0ko/PanasonicP2.MXF?dl=0

in witch I cannot extract any audio because both ffmpeg (and ffprobe) and avisynth (with FFMS2 and LSmashSource) can not read any audio tracks.

Meanwhile a vulgar way to determine if anyAudio is present or not, it might be to find any phrase called:

Sampling rate                            :

by using the

        findstr /c:"Sampling rate                            :" "mediainfo.txt"
        IF NOT ERRORLEVEL 1 (set "ProbableAudio=1")

inside the medianfo.txt response

In this case however I can know that any Audio is present, but I still did not find the way to extract it in a .wav at least Audio Channel 1 and 2

[_Al_]

this will make stereo from two channels in mxf file:

ffmpeg -i video.mxf -map 0:1 -map 0:2 -c:a:0 pcm_s16le -c:a:1 pcm_s16le -filter_complex amerge audio.wav

so you can run this to get mkv:

ffmpeg -i video.mxf -c:v copy -an -sn video.m2v
ffmpeg -i video.mxf -map 0:1 -map 0:2 -c:a:0 pcm_s16le -c:a:1 pcm_s16le -filter_complex amerge audio.wav
mkvmerge -o video.mkv video.m2v audio.wav

Or just use mp4box to get MP4, not sure what you need or if Wav is ok in MP4, or just encode that wav into AAC

[marcorocchini]

using

ffmpeg -i video.mxf -map 0:1 -map 0:2 -c:a:0 pcm_s16le -c:a:1 pcm_s16le -filter_complex amerge audio.wav

I get an error

[mxf @ 028b7500] material track 2: no corresponding source track found

seems that ffmpeg won't works with panasonic p2 mxf files

[_Al_]

That was tested with Canon MXF, so perhaps. Or try other tracks 3, 4 , not sure how it is built.

[Budman1]

If you are still interested in Mediainfo CLI then it can give you what you wish also. Detailed instructions and functions are included with the zip when you download the CLI. Then pick any of the hundreds of audio attributes and create a template.txt with such as:

Audio;Audio Codec = "%CodecID%" Format = "%Format%"\r\n

create a batch file with:

mediainfo.exe --Inform=file://C:\Users\Bud\Desktop\mp3video\template.txt C:\Users\Bud\Desktop\mp3video\PanasonicP2.MXF > output.txt
pause

You can of course incorporate variables and %%a, etc. for drag and drop, but what you will get is:

[Attachment 43620 - Click to enlarge]

[Attachment 43621 - Click to enlarge]

You can parse and import this information into batch variables. (https://stackoverflow.com/questions/3068929/how-to-read-file-contents-into-a-variable-...n-a-batch-file)

This is only a rough outline but you should be able to adapt for what you want to do.

[marcorocchini]

thank you