wavsource and loop function

[Dark-Cracker]

Hi,

i have made a little script to loop an avi 6 time.

----------
Source = "T03_source.avi"

clip = aviSource(Source,false).loop(6)
audio=wavsource("sound.wav").resampleaudio(44100)

audio=audio.loop(6)

final=audiodub(clip, audio).bilinearresize(512,224).trim(1,0)

return final
-------------

i have first test to mux audio and video using audiodub and made a loop but once the second loop start i don't have sound.

i have try to made the loop before the audiodub but same result.

finaly the only way is to replace :

-----------
audio=audio.loop(6)

by

audio=audio+audio+audio+audio+audio+audio
-----------

apparently the loop function doesn't work on audio file.
perhaps someone could made a test to see if he have the same problem in order to help avisynth team to fix this bug :)

Bye.

[DocDragon]

Originally posted by Dark-Cracker
[...]
-----------
audio=audio.loop(6)

by

audio=audio+audio+audio+audio+audio+audio
-----------

apparently the loop function doesn't work on audio file.
perhaps someone could made a test to see if he have the same problem in order to help avisynth team to fix this bug :)

Bye.

thanks a lot for posting your findings. i had to fight with the same problem and finally realized that "loop" unfortunately does not work with audio clips although that would be the next logical thing to do. maybe that should be mentioned in the manual.

you just solved my problem with a "less" elegant solution (audio=audio+audio+...) :D

well, at least this is documented for others in the forum...

DD

[sh0dan]

Are you using the latest 2.5.5 beta?

The latest had this fix:
- Loop should now support all kinds of audio.

[stickboy]

I'm using the latest alpha build, and WAVSource("foo.wav").Loop(2) throws an unrecognized exception.

Looking at the Loop source code, it doesn't seem surprising... it uses a lot of values from the VideoInfo struct that I wouldn't expect to be legitimate. (vi.fps_numerator is 0, which causes a divide-by-zero.)

[sh0dan]

Thanks!

Seems like a clean fix!

Applied!

[stickboy]

Actually, I think it still doesn't work. (When I realized that, I removed the link to my patch, but I guess not soon enough.)

It seemed to work for Loop(2) but not for higher values... I'll look into it more later.

[sh0dan]

Yes, it should have been:

loop_ends_at_sample = vi.num_audio_samples * times;

- but otherwise it seems fine.

Moving to development.