Hi All,

Some background: 

Machine: Phenom II 3Ghz, 790gx motherboard, 4GB RAM, 1TB HD

OS: Ubuntu (Jaunty Jackalope 9.04 - Release Candidate).

kdenlive: From ubuntu installation (I belive it is 7.2.x) but can verify if needed.

Camcorder: Panasonic HDC-SD9 (SDHC card based, 1080p, AVCHD, Records as MTS files).

I have been saving my HD recordings due to lack of editing/conversion software for AVCHD in Linux.  Recently I discovered kdenlive and was also able to load MTS files from camcorder into kdenlive (using 'Add Clip' menuitem).  And convert (using 'Render' button)  into few other formats (AVI-DV) and then use the resulting video in avidemux (for doing some other things).  It worked beautifully.  I have finally made DVDs for my family.

As I started converting rest of the video backup directories (taken at different dates over period of last year).   I noticed that recent recordings DO NOT play audio inside kdenlive and 'Render' also generates files with no audio (mplayer says it found audio track but no sound is produced.  It is silent video).  I have been able to consistently repeat this (older clip plays both video and sound, but recent files play video only and export video with silent audio track). 

All video files (MTS) I have are taken in exact same camcorder (and no recollection of changing any settings in between) I am sure that both clips (old and new) are fine, because, both work well inside Windows XP.  

Could someone help me.  I am in a hurry to convert them to take with me when I visit my family overseas next month.  I have some of the backups converted to mpeg2 (then to DVD), but recent recordings do not have sound.  I have repeated the process after clearing kdenlive settings directory (inside .kde) etc., with same results.  Even now, I can load an old file and play or convert it successfully in kdenlive.  Newer clips do not play audio (and exports have silence).

I can provide short (30 seconds?) source clips from both (working and not working) if desired.  Let me know how to send it.

Well, this problem seems to be gone after I manually compiled ffmpeg and installed it using following steps:

- apt-get install libfaad2-0 libmp4v2-dev libmpeg4ip-dev libfaad-dev libfaad2-0 faad faac libfaac-dev libfaac0 libogmrip-dev libogmrip0 libgsm1-dev libtheora-dev libvorbis-dev libx264-dev libx264-65 libxvidcore4-dev

- svn checkout svn://svn.ffmpeg.org/ffmpeg/trunk ffmpeg

- cd ffmpeg

./configure  --disable-debug --enable-libfaad --enable-libfaac --enable-gpl  --enable-libx264 --enable-libxvid --enable-pthreads --enable-libvorbis  --enable-libtheora --enable-libgsm  --disable-debug --enable-shared --prefix=/usr

- sudo su

- make install

I hope someone finds it useful.