mp4 - format unknown error with ffmpeg -


i'm trying convert .webm .mp4 using :

ffmpeg -fflags +genpts -i 1.webm -r 24 1.mp4

it doesn't work , :

c:\users\mahmoud\desktop\ffmpeg>ffmpeg -fflags +genpts -i v.webm -r 24 1.mp4 ffmpeg version svn-r18639, copyright (c) 2000-2009 fabrice bellard, et al.   configuration: --enable-memalign-hack --enable-postproc --enable-gpl --enable- libfaac --enable-libfaad --enable-libgsm --enable-libmp3lame --enable-libvorbis --enable-libtheora --enable-libx264 --enable-libxvid --disable-ffserver --enable -avisynth --enable-pthreads   libavutil     50. 3. 0 / 50. 3. 0   libavcodec    52.27. 0 / 52.27. 0   libavformat   52.32. 0 / 52.32. 0   libavdevice   52. 2. 0 / 52. 2. 0   libswscale     0. 7. 1 /  0. 7. 1   libpostproc   51. 2. 0 / 51. 2. 0   built on apr 21 2009 13:44:38, gcc: 4.2.4 (tdm-1 mingw) v.webm: unknown format

any 1 can ?

your ffmpeg ancient, , believe webm support included later, in 2010. current build here.

you can try luck 

ffmpeg -fflags +genpts -f matroska -i 1.webm -r 24 1.mp4

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