AviSynth & VirtualDub - Comfortable ways to create avs-files?

[klischee]

Hi

I use AviSynth and ffmpeg (ffmpegsource2) to open almost all formats with VirtualDub. Because of I am editing hundrets of Videos a week, I need a quick, comfortable way to create AviSynth scripts for VDub.

At moment, I created a button for my commander (Directory Opus), which creates through the windows shell .avs-files for all marked videos. This is the batch command I use with the button:

C:\windows\system32\cmd.exe /C echo ffmpegsource2("{file$}", atrack=-1) > "{sourcepath}\{file$|noext}.avs"

With this command I get script files looking like this:

ffmpegsource2("example.wmv", atrack=-1)

This is quite comfortable. But it's not dynamic enough. When I try to open an automatically created .avs file of an video without an audio stream, I get following message from VirtualDub:

Avisynth open failure:
FFAudioSource: No Audio track found
(FFMS2.avsi, line 38)
(C:\example.avs, line1)

Then I open the video with the direct show plugin.

Could you help me a little find a way how to detect videos without sound to automatically adjust the AviSynth scripts for them? Possibly with MediaInfo or something? Or do you have complete other ideas how I could open up non-avi files in VDub with maximum comfort?

The batch script above is simple and I was able to create it, but I have no clue how to use it with MediaInfo or something to detect audio streams and adjust the output script.

[Gavino]

You could alter your script to use the Avisynth try/catch construct.
Something like

try {
  ffmpegsource2("example.wmv", atrack=-1)
}
catch (err) {
  DirectShowSource("example.wmv")
}

[klischee]

Good and simple idea! But DirectShow source has also problems with files without audio streams. But I can open it with ffmpeg too, when I don't use the atrack parameter.

This is now my batch script (with variables (grey) given from Directory Opus):

C:\windows\system32\cmd.exe /C echo try { ffmpegsource2("{file$}", atrack=-1) } catch (err) { ffmpegsource2("{file$}") } > "{sourcepath}\{file$|noext}.avs"

Nice. Thank you - I will use this. But if someone see's this thread and have a good idea doing it even better, I'm open for all ideas

[jagabo]

I use a bunch of batch files in my Send To folder. That way I can just right click on a file and select Send To... For example AVS_AviSource.bat contains:

echo AviSource("%~d1%~p1%~n1%~x1") > "%~d1%~p1%~n1.avs"

That creates an AVS script with the same filename the video but with .AVS as the extension. Then I open and edit the file if necessary. I also have scripts for DirectShowSource and Mpeg2Source. And batch files for x264 encoding with different presets.

[klischee]

I use a bunch of batch files in my Send To folder. That way I can just right click on a file and select Send To...

Sounds like the same I already do (with a button of my Commander tool). What I am interested in is to create those avs completely dynamic, to prevent errors. But the if/else string is quite cool, I have to look more into the syntax of avisynth it seems.

echo AviSource("%~d1%~p1%~n1%~x1") > "%~d1%~p1%~n1.avs"

From what are these variables?

[jagabo]

echo AviSource("%~d1%~p1%~n1%~x1") > "%~d1%~p1%~n1.avs"

From what are these variables?

http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/percent.mspx

Same as your {file$} and {file$|noext}.avs

[poisondeathray]

OOPS Sorry

[klischee]

http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/percent.mspx

Same as your {file$} and {file$|noext}.avs

Ah, interesting - thanks!