Avisynth + VD resulting file size

[lisztfr9]

Hi all,

I read something about XVid missing the file size' target in some cases. I'm wondering about following results, i'm using an Avi stream, codec = Xvid 1.0.3, nothing special, kbps = 1280.

1) Feeding it directly into VD, using the last Xvid codec for compression, single pass, get estimated filesize about 1,3 GB

2) Feeding VD with following script :

video=AviSource("C:\...\L'oro Di Napoli.avi")

return video

=> In the second case, the file is about 1GB bigger, according to the Xvid estimation witch i found quite correct. Why, avisynth is just carrying the stream to VD... doing nothing ?

Thanks, L


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(Sorry i can't enable tags...maybe addblock ?)

Edit : ffdshow isn't the culprit, since AviSource doesn't use it. At least it seems to me... DirectShowSource use it.

It maybe the audio stream, witch is decompressed with avisynth. Please forget it :(

[Guest]

2) Feeding VD with following script :

video=AviSource("C:\...\L'oro Di Napoli.avi")

return video

=> In the second case, the file is about 1GB bigger, according to the Xvid estimation witch i found quite correct. Why, avisynth is just carrying the stream to VD... doing nothing ? That is all that your script does, i.e., passes the decompressed video to VirtualDub. Then you set compression in VirtualDub and away you go. Did I miss something?

You should check the output color spaces for the two streams. That could account for a difference. All your encode settings should be the same in the two cases.