FLV goes out of sync when I edit it in Premiere or After Effects

[Atoon]

I'm on a Mac an have an FLV video that plays fine in VLC and when I embed it in a video flash player for the web but got screwed when I import it on Adobe Premiere or After Effects—the audio is fine but the video ran somewhat faster at some parts, and got trimed when the video ends rather than when the sound ends. This is the main data of the video (in Spanish but you may get the meaning):

Tipo: FLV
Tamaño de archivo: 283,4 MB
Tamaño de la imagen: 480 x 368
Profundidad en píxeles: 32
Velocidad de fotograma: 15,00
Formato de audio de origen: 44100 Hz - comprimido - Estéreo
Formato de audio del proyecto: 44100 Hz - Punto flotante de 32 bits - Estéreo
Duración total: 01;05;48;23
Velocidad media de datos: 73 KB / segundos
Proporción de píxeles: 1,0

I have similar files whose only difference is the framerate (like 29,97) an plays perfectly with no problem. I have tried to convert it with the Adobe Media Encoder and Handbrake in a number of ways, and when I see the resulting file it goes out of sync both on Premiere, After Effects AND VLC player and the like. In my ignorance, I suppose that the problem is that the framerate is actually variable, but I don't know what to do in those cases.

[poisondeathray]

probably vfr

not sure how you would handle it on a mac, but on pc, you would usually attempt to convert to cfr with avisynth, and use a lossless intermediate before importing into premiere or AE

on windows, you can use flvextract, and it will print out a timecodes sheet, with that you can verify if it is vfr

perhaps a mod can move this thread, you will likely get better answers if it was in the mac section

[Atoon]

I haven't solved the problem, but I got more info of the file with MediaInfo.

General
Complete name : cap8(2).flv
Format : Flash Video
File size : 283 MiB
Duration : 1h 5mn
Overall bit rate : 602 Kbps
Tagging application : Moyea FLV Lib
liveXML : <?xpacket begin="" id="W5M0MpCehiHzreSzNTczkc9d"?>

Video
Format : VP6
Duration : 1h 5mn
Bit rate : 500 Kbps
Width : 480 pixels
Height : 360 pixels
Display aspect ratio : 4:3
Frame rate mode : Constant
Frame rate : 15.000 fps
Bits/(Pixel*Frame) : 0.193
Stream size : 235 MiB (83%)

Audio
Format : MPEG Audio
Format version : Version 1
Format profile : Layer 3
Mode : Joint stereo
Mode extension : MS Stereo
Duration : 1h 5mn
Bit rate mode : Constant
Bit rate : 96.0 Kbps
Channel(s) : 2 channels
Sampling rate : 44.1 KHz
Bit depth : 16 bits
Video delay : 6ms
Stream size : 45.2 MiB (16%)