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  • ffmpeg trim .mp3 - output length forced to 2 seconds

    22 septembre 2015, par Brooks

    I have just downloaded the latest version of ffmpeg and I am trying to trim the first 14 and the last 6 seconds from a 40 seconds .mp3 file.

    The problem I have is that doesn’t matter what -t X I use, the output is always only 2 seconds in length. It’s my first using ffmpeg but it seems like something is forcing it to limit the output to 2 seconds.

    I tried a lot of commands including

    ffmpeg -ss 00:00:14.358 -i input.mp3 -ab 32k -t 00:00:20.04 -c:a copy output.mp3 -y
    

    
ffmpeg -ss 14 -i input.mp3 -ab 32k -t 20 -c:a copy output.mp3 -y
    

    
ffmpeg -ss 14 -i input.mp3 -t 20 -acodec copy output.mp3 -y
    

    
ffmpeg -ss 14 -i input.mp3 -acodec copy output.mp3 -y
    

    
ffmpeg -ss 14 -t 20 -i input.mp3 output.mp3
    

    
ffmpeg -ss 14 -i input.mp3 -t 20 output.mp3

    but the result is almost always a 2 sec mp3 file.
    Now I’m out of ideas.

    As requested this is the output from the console :

    > Input #0, mp3, from 'C:\Track7.mp3':   Duration: 00:00:40.49, start:
    
> 0.000000, bitrate: 128 kb/s
    
>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s Output #0, mp3, to 'C:\Track7.mp3':   Metadata:
    
>     TSSE            : Lavf57.2.100
    
>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, 128 kb/s Stream mapping:   Stream #0:0 -> #0:0 (copy) Press [q] to stop, [?] for help
    
> size=       1kB time=00:00:00.00 bitrate= 752.3kbits/s video:0kB
    
> audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing
    
> overhead: 110.287079%
    
> 
    
> C:\Je>ffmpeg -ss 00:00:14.358 -i "C:\Track7.mp3" -t 5 -c:a copy
    
> "C:\Track7.mp3" -y ffmpeg version N-75463-g53e8bef Copyright (c)
    
> 2000-2015 the FFmpeg developers   built with gcc 4.9.3 (GCC)  
    
> configuration: --enable-gpl --enable-version3 --disable-w32threads
    
> --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnu tls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enab le-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable
    
> -libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --ena ble-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --e nable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib   libavutil      55.  2.100 / 55.  2.100   libavcodec     57.  3.100 /
    
> 57.  3.100   libavformat    57.  2.100 / 57.  2.100   libavdevice    57.  0.100 / 57.  0.100   libavfilter     6.  6.100 /  6.  6.100   libswscale      4.  0.100 /  4.  0.100   libswresample   2.  0.100 / 
    
> 2.  0.100   libpostproc    54.  0.100 / 54.  0.100 [mp3 @ 0000000002fb02c0] Skipping 0 bytes of junk at 0. [mp3 @
    
> 0000000002fb02c0] Estimating duration from bitrate, this may be
    
> inaccurate Input #0, mp3, from 'C:\Track7.mp3':   Duration:
    
> 00:00:40.49, start: 0.000000, bitrate: 128 kb/s
    
>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s Output #0, mp3, to 'C:\Track7.mp3':   Metadata:
    
>     TSSE            : Lavf57.2.100
    
>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, 128 kb/s Stream mapping:   Stream #0:0 -> #0:0 (copy) Press [q] to stop, [?] for help
    
> size=      32kB time=00:00:02.04 bitrate= 129.5kbits/s video:0kB
    
> audio:32kB subtitle:0kB other streams:0kB global headers:0kB muxing
    
> overhead: 1.410433%
    
> 
    
> C:\Je>ffmpeg -ss 00:00:14.358 -i "C:\Track7.mp3" -c:a copy
    
> "C:\Track7.mp3" -t 5 -y ffmpeg version N-75463-g53e8bef Copyright (c)
    
> 2000-2015 the FFmpeg developers   built with gcc 4.9.3 (GCC)  
    
> configuration: --enable-gpl --enable-version3 --disable-w32threads
    
> --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnu tls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enab le-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable
    
> -libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --ena ble-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --e nable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib   libavutil      55.  2.100 / 55.  2.100   libavcodec     57.  3.100 /
    
> 57.  3.100   libavformat    57.  2.100 / 57.  2.100   libavdevice    57.  0.100 / 57.  0.100   libavfilter     6.  6.100 /  6.  6.100   libswscale      4.  0.100 /  4.  0.100   libswresample   2.  0.100 / 
    
> 2.  0.100   libpostproc    54.  0.100 / 54.  0.100 Trailing options were found on the commandline. [mp3 @ 0000000003020300] Skipping 0
    
> bytes of junk at 0. [mp3 @ 0000000003020300] Estimating duration from
    
> bitrate, this may be inaccurate Input #0, mp3, from 'C:\Track7.mp3':  
    
> Duration: 00:00:40.49, start: 0.000000, bitrate: 128 kb/s
    
>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s Output #0, mp3, to 'C:\Track7.mp3':   Metadata:
    
>     TSSE            : Lavf57.2.100
    
>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, 128 kb/s Stream mapping:   Stream #0:0 -> #0:0 (copy) Press [q] to stop, [?] for help
    
> size=      32kB time=00:00:02.04 bitrate= 129.5kbits/s video:0kB
    
> audio:32kB subtitle:0kB other streams:0kB global headers:0kB muxing
    
> overhead: 1.410433%
    
> 
    
> C:\Je>ffmpeg -ss 00:00:14.358 -i "C:\Track7.mp3" -c:a copy -t 5
    
> "C:\Track7.mp3" -y ffmpeg version N-75463-g53e8bef Copyright (c)
    
> 2000-2015 the FFmpeg developers   built with gcc 4.9.3 (GCC)  
    
> configuration: --enable-gpl --enable-version3 --disable-w32threads
    
> --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnu tls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enab le-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable
    
> -libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --ena ble-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --e nable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib   libavutil      55.  2.100 / 55.  2.100   libavcodec     57.  3.100 /
    
> 57.  3.100   libavformat    57.  2.100 / 57.  2.100   libavdevice    57.  0.100 / 57.  0.100   libavfilter     6.  6.100 /  6.  6.100   libswscale      4.  0.100 /  4.  0.100   libswresample   2.  0.100 / 
    
> 2.  0.100   libpostproc    54.  0.100 / 54.  0.100 [mp3 @ 00000000003102c0] Skipping 0 bytes of junk at 0. [mp3 @
    
> 00000000003102c0] Estimating duration from bitrate, this may be
    
> inaccurate Input #0, mp3, from 'C:\Track7.mp3':   Duration:
    
> 00:00:40.49, start: 0.000000, bitrate: 128 kb/s
    
>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s Output #0, mp3, to 'C:\Track7.mp3':   Metadata:
    
>     TSSE            : Lavf57.2.100
    
>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, 128 kb/s Stream mapping:   Stream #0:0 -> #0:0 (copy) Press [q] to stop, [?] for help
    
> size=      32kB time=00:00:02.04 bitrate= 129.5kbits/s video:0kB
    
> audio:32kB subtitle:0kB other streams:0kB global headers:0kB muxing
    
> overhead: 1.410433%
    
> 
    
> C:\Je>ffmpeg -ss 00:00:14.358  -t 5 -i "C:\Track7.mp3" -c:a copy
    
> "C:\Track7.mp3" -y ffmpeg version N-75463-g53e8bef Copyright (c)
    
> 2000-2015 the FFmpeg developers   built with gcc 4.9.3 (GCC)  
    
> configuration: --enable-gpl --enable-version3 --disable-w32threads
    
> --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnu tls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enab le-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable
    
> -libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --ena ble-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --e nable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib   libavutil      55.  2.100 / 55.  2.100   libavcodec     57.  3.100 /
    
> 57.  3.100   libavformat    57.  2.100 / 57.  2.100   libavdevice    57.  0.100 / 57.  0.100   libavfilter     6.  6.100 /  6.  6.100   libswscale      4.  0.100 /  4.  0.100   libswresample   2.  0.100 / 
    
> 2.  0.100   libpostproc    54.  0.100 / 54.  0.100 [mp3 @ 0000000002fb02c0] Skipping 0 bytes of junk at 0. [mp3 @
    
> 0000000002fb02c0] Estimating duration from bitrate, this may be
    
> inaccurate Input #0, mp3, from 'C:\Track7.mp3':   Duration:
    
> 00:00:40.49, start: 0.000000, bitrate: 128 kb/s
    
>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s Output #0, mp3, to 'C:\Track7.mp3':   Metadata:
    
>     TSSE            : Lavf57.2.100
    
>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, 128 kb/s Stream mapping:   Stream #0:0 -> #0:0 (copy) Press [q] to stop, [?] for help
    
> size=      32kB time=00:00:02.04 bitrate= 129.5kbits/s video:0kB
    
> audio:32kB subtitle:0kB other streams:0kB global headers:0kB muxing
    
> overhead: 1.410433%
    
> 
    
> C:\Je>ffmpeg -i "C:\Track7.mp3"-ss 00:00:14.358 -acodec copy
    
> "C:\Track7.mp3" -y ffmpeg version N-75463-g53e8bef Copyright (c)
    
> 2000-2015 the FFmpeg developers   built with gcc 4.9.3 (GCC)  
    
> configuration: --enable-gpl --enable-version3 --disable-w32threads
    
> --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnu tls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enab le-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable
    
> -libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --ena ble-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --e nable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib   libavutil      55.  2.100 / 55.  2.100   libavcodec     57.  3.100 /
    
> 57.  3.100   libavformat    57.  2.100 / 57.  2.100   libavdevice    57.  0.100 / 57.  0.100   libavfilter     6.  6.100 /  6.  6.100   libswscale      4.  0.100 /  4.  0.100   libswresample   2.  0.100 / 
    
> 2.  0.100   libpostproc    54.  0.100 / 54.  0.100 C:\Track7.mp3-ss: No such file or directory
    
> 
    
> C:\Je>ffmpeg -i "C:\Track7.mp3" -ss 00:00:14.358 -acodec copy
    
> "C:\Track7.mp3" -y ffmpeg version N-75463-g53e8bef Copyright (c)
    
> 2000-2015 the FFmpeg developers   built with gcc 4.9.3 (GCC)  
    
> configuration: --enable-gpl --enable-version3 --disable-w32threads
    
> --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnu tls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enab le-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable
    
> -libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --ena ble-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --e nable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib   libavutil      55.  2.100 / 55.  2.100   libavcodec     57.  3.100 /
    
> 57.  3.100   libavformat    57.  2.100 / 57.  2.100   libavdevice    57.  0.100 / 57.  0.100   libavfilter     6.  6.100 /  6.  6.100   libswscale      4.  0.100 /  4.  0.100   libswresample   2.  0.100 / 
    
> 2.  0.100   libpostproc    54.  0.100 / 54.  0.100 [mp3 @ 0000000002fb0240] Skipping 0 bytes of junk at 0. [mp3 @
    
> 0000000002fb0240] Estimating duration from bitrate, this may be
    
> inaccurate Input #0, mp3, from 'C:\Track7.mp3':   Duration:
    
> 00:00:40.49, start: 0.000000, bitrate: 128 kb/s
    
>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s Output #0, mp3, to 'C:\Track7.mp3':   Metadata:
    
>     TSSE            : Lavf57.2.100
    
>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, 128 kb/s Stream mapping:   Stream #0:0 -> #0:0 (copy) Press [q] to stop, [?] for help
    
> size=       0kB time=00:00:00.00 bitrate=N/A video:0kB audio:0kB
    
> subtitle:0kB other streams:0kB global headers:0kB muxing overhead:
    
> unknown Output file is empty, nothing was encoded (check -ss / -t /
    
> -frames parameters if used)
    
> 
    
> C:\Je>ffmpeg -ss 00:00:14.358 -i "C:\Track7.mp3" -c:a copy
    
> "C:\Track7.mp3" -y ffmpeg version N-75463-g53e8bef Copyright (c)
    
> 2000-2015 the FFmpeg developers   built with gcc 4.9.3 (GCC)  
    
> configuration: --enable-gpl --enable-version3 --disable-w32threads
    
> --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnu tls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enab le-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable
    
> -libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --ena ble-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --e nable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib   libavutil      55.  2.100 / 55.  2.100   libavcodec     57.  3.100 /
    
> 57.  3.100   libavformat    57.  2.100 / 57.  2.100   libavdevice    57.  0.100 / 57.  0.100   libavfilter     6.  6.100 /  6.  6.100   libswscale      4.  0.100 /  4.  0.100   libswresample   2.  0.100 / 
    
> 2.  0.100   libpostproc    54.  0.100 / 54.  0.100 [mp3 @ 0000000002fb0220] Skipping 0 bytes of junk at 0. [mp3 @
    
> 0000000002fb0220] Estimating duration from bitrate, this may be
    
> inaccurate Input #0, mp3, from 'C:\Track7.mp3':   Duration:
    
> 00:00:40.49, start: 0.000000, bitrate: 128 kb/s
    
>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s Output #0, mp3, to 'C:\Track7.mp3':   Metadata:
    
>     TSSE            : Lavf57.2.100
    
>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, 128 kb/s Stream mapping:   Stream #0:0 -> #0:0 (copy) Press [q] to stop, [?] for help
    
> size=      32kB time=00:00:02.04 bitrate= 129.5kbits/s video:0kB
    
> audio:32kB subtitle:0kB other streams:0kB global headers:0kB muxing
    
> overhead: 1.410433%
    
> 
    
> C:\Je>ffmpeg -ss 00:00:14.358 -i "C:\Track7.mp3" -ab 32k -c:a copy
    
> "C:\Track7.mp3" -y ffmpeg version N-75463-g53e8bef Copyright (c)
    
> 2000-2015 the FFmpeg developers   built with gcc 4.9.3 (GCC)  
    
> configuration: --enable-gpl --enable-version3 --disable-w32threads
    
> --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnu tls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enab le-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable
    
> -libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --ena ble-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --e nable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib   libavutil      55.  2.100 / 55.  2.100   libavcodec     57.  3.100 /
    
> 57.  3.100   libavformat    57.  2.100 / 57.  2.100   libavdevice    57.  0.100 / 57.  0.100   libavfilter     6.  6.100 /  6.  6.100   libswscale      4.  0.100 /  4.  0.100   libswresample   2.  0.100 / 
    
> 2.  0.100   libpostproc    54.  0.100 / 54.  0.100 [mp3 @ 0000000002fb02c0] Skipping 0 bytes of junk at 0. [mp3 @
    
> 0000000002fb02c0] Estimating duration from bitrate, this may be
    
> inaccurate Input #0, mp3, from 'C:\Track7.mp3':   Duration:
    
> 00:00:40.49, start: 0.000000, bitrate: 128 kb/s
    
>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s Output #0, mp3, to 'C:\Track7.mp3':   Metadata:
    
>     TSSE            : Lavf57.2.100
    
>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, 128 kb/s Stream mapping:   Stream #0:0 -> #0:0 (copy) Press [q] to stop, [?] for help
    
> size=      32kB time=00:00:02.04 bitrate= 129.5kbits/s video:0kB
    
> audio:32kB subtitle:0kB other streams:0kB global headers:0kB muxing
    
> overhead: 1.410433%
    
> 
    
> C:\Je>ffmpeg -ss 00:00:14.358 -i "C:\Track7.mp3" -ab 32k -t
    
> 00:00:20.04 -c:a copy "C:\Track7.mp3" -y ffmpeg version
    
> N-75463-g53e8bef Copyright (c) 2000-2015 the FFmpeg developers   built
    
> with gcc 4.9.3 (GCC)   configuration: --enable-gpl --enable-version3
    
> --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnu tls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enab le-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame
    
> --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable
    
> -libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --ena ble-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --e nable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib   libavutil      55.  2.100 / 55.  2.100   libavcodec     57.  3.100 /
    
> 57.  3.100   libavformat    57.  2.100 / 57.  2.100   libavdevice    57.  0.100 / 57.  0.100   libavfilter     6.  6.100 /  6.  6.100   libswscale      4.  0.100 /  4.  0.100   libswresample   2.  0.100 / 
    
> 2.  0.100   libpostproc    54.  0.100 / 54.  0.100 [mp3 @ 00000000031903c0] Skipping 0 bytes of junk at 0. [mp3 @
    
> 00000000031903c0] Estimating duration from bitrate, this may be
    
> inaccurate Input #0, mp3, from 'C:\Track7.mp3':   Duration:
    
> 00:00:40.49, start: 0.000000, bitrate: 128 kb/s
    
>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s Output #0, mp3, to 'C:\Track7.mp3':   Metadata:
    
>     TSSE            : Lavf57.2.100
    
>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, 128 kb/s Stream mapping:   Stream #0:0 -> #0:0 (copy) Press [q] to stop, [?] for help
    
> size=      32kB time=00:00:02.04 bitrate= 129.5kbits/s video:0kB
    
> audio:32kB subtitle:0kB other streams:0kB global headers:0kB muxing
    
> overhead: 1.410433%

    What am I doing wrong ?

  • ffmpeg rotate and trim video 4k horizontal -> 2k vertical

    19 juillet 2015, par Flash Thunder

    I was looking for solution, but seems that the ones that google finds are not valid anymore... I think that you have to use mapping for that, but not sure how...

    I need to rotate horizontal 4K video and trim it (leaving center part), so the output would be vertical 1080p. Could anybody give me a hand with that ?

    Of course I need to keep the best possible quality.

    PS. ffmpeg compiled from git-8250943 (2015-07-17)

  • How to configure Red5-Server 1.0.5 RELEASE and Red5-Client 1.0.5 RELEASE ? [on hold]

    25 juillet 2015, par Gerardo Barzola

    I have a big problem. Recently my friend and i we would try to configure Red5-client 1.0.5 RELEASE and Red5-server 1.0.5 RELEASE.

    We are using :

    • Ubuntu 12.04.5 LTS
    • ruby 2.0.0p643
    • Rails 4.2.1
    • Server Apache/2.2.22 (Ubuntu)
    • Phusion Passenger 5.0.7
    • FFMPEG version git-2015-05-22-ebb08f3

    And the configuration of the red5 server is good.
    But we have problems to configure red5 client. We dont know how to install and configure. We need to configure and webcamera screenshot and webcamera capture video.

    Do you give me and steps that how to install and configure ?

    Thanks a lot,

    Gerardo

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