{\rtf1\ansi\ansicpg1252\cocoartf949\cocoasubrtf270 {\fonttbl\f0\fswiss\fcharset0 Helvetica;} {\colortbl;\red255\green255\blue255;} \margl1440\margr1440\vieww9000\viewh8400\viewkind0 \pard\tx720\tx1440\tx2160\tx2880\tx3600\tx4320\tx5040\tx5760\tx6480\tx7200\tx7920\tx8640\ql\qnatural\pardirnatural \f0\fs24 \cf0 transcoding MKVs to MP4. for the first 5-6 seconds, many frames are dropped, at the 6-7 second mark video halts, and then all of a sudden resumes and continues converting normally.\ \ this is just one problem file I'm having, there's at least one another, I'm sure I could find more. mencoder handles both fine. i've narrowed it down to something wrong with the mkv formatting, because if I use mkvextract to extract both the audio and video, convert each with ffmpeg, and then remux with mp4box, everything is fine.\ \ using a very generic command line: ffmpeg -i source.mkv broken_file.mp4\ \ Build details: FFmpeg version SVN-r12942, Copyright (c) 2000-2008 Fabrice Bellard, et al.\ configuration: --prefix=/usr --enable-pthreads --enable-gpl --enable-libfaac --enable-libfaad --enable-libx264 --enable-libmp3lame --enable-libfaac --enable-libfaad --enable-liba52 --enable-libxvid --enable-swscale\ on Mac OS X 10.5.2}