<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body bgcolor="#ffffff" text="#000000"> Hi All.. I m encoding pcm file with faac and then muxing it with qtmux. I am using this pipeline. file is being played in VLC and QT player. gst-launch filesrc blocksize=2048  location=/home/Gurpreet/inputfilesmp4/Sample_Files/New_Folder/CH1_48000_mono_16bit.pcm ! audio/x-raw-int, channels=1, rate=48000,  width=16, depth=16, endianness=1234, signed=true ! faac  ! aacparse ! audio/mpeg,rate=48000, channels=1, mpegversion=4, layer=3 ! qtmux ! filesink location=/home/Gurpreet/outputfilesmp4/exp_mov.mov But Whenever i m setting faac property "outputformat=1"  ( for ADTS Header ) then gst-launch filesrc blocksize=2048  location=/home/Gurpreet/inputfilesmp4/Sample_Files/New_Folder/CH1_48000_mono_16bit.pcm ! audio/x-raw-int, channels=1, rate=48000,  width=16, depth=16, endianness=1234, signed=true ! faac  outputformat=1 ! aacparse ! audio/mpeg,rate=48000, channels=1, mpegversion=4, layer=3 ! qtmux ! filesink location=/home/Gurpreet/outputfilesmp4/exp_mov.mov then the generated file is being played in vlc but in QT bar is moving but no audio is coming. what could be the error ? outputformat=0 is for RAW Aac outputformat=1 is for ADTS is this bug in qtmux ? what could be the reason ? instead of that if i m reading aac (RAW) file with filesrc and then passing it to qtmux  then mov file is being played in vlc as well as in quicktime. but if i m reading aac (ADTS) file with filesrc then passing it to qtmux then mov file is playing fine in vlc player but in qt,,bar is moving but no audio is coming.. where is the problem ?? in qtmux or quicktime doesnot support adts file in mov container. Thanks Gurpreet <div class="moz-signature"> </div> <div class="moz-signature">-- Gurpreet Singh Tata Elxsi Ltd. Bangalore +91-8022984127 +91-9019219511 <h2> Rabba Mehar Kari Asi Ud-de Aasre Tere </h2> <h2></h2> </div> </body> </html>