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  • ffmpeg silence detect and removal

    6 septembre 2014, par Zahlii

    I am trying to use the following command with the latest ffmpeg build to remove silence from my .mp3 files:

    ffmpeg -i SILENCE.mp3 -af silencedetect=n=-50dB:d=1 -y -ab 192k  SILENCE_OUT.mp3

    However, the following output is produced:

    ffmpeg version N-66154-g1654ca7 Copyright (c) 2000-2014 the FFmpeg developers
  built on Sep  5 2014 22:10:38 with gcc 4.8.3 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
le-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --
enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-lib
modplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrw
b --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinge
r --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --en
able-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis
 --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-
libx265 --enable-libxavs --enable-libxvid --enable-decklink --enable-zlib
  libavutil      54.  7.100 / 54.  7.100
  libavcodec     56.  1.100 / 56.  1.100
  libavformat    56.  4.100 / 56.  4.100
  libavdevice    56.  0.100 / 56.  0.100
  libavfilter     5.  1.100 /  5.  1.100
  libswscale      3.  0.100 /  3.  0.100
  libswresample   1.  1.100 /  1.  1.100
  libpostproc    53.  0.100 / 53.  0.100
Input #0, mp3, from 'SILENCE.mp3':
  Metadata:
    title           : Snowblind (Featuring Tasha Baxter)
    artist          : Au5
    album           : Snowblind (Featuring Tasha Baxter)
    genre           : Electronica
    performer       : Au5
    track           : 1/1
    date            : 2014
    album_artist    : Au5,Tasha Baxter
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: isommp42
    encoder         : Lavf55.42.100
  Duration: 00:05:50.80, start: 0.025057, bitrate: 192 kb/s
    Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 192 kb/s
Output #0, mp3, to 'SILENCE_OUT.mp3':
  Metadata:
    TIT2            : Snowblind (Featuring Tasha Baxter)
    TPE1            : Au5
    TALB            : Snowblind (Featuring Tasha Baxter)
    TCON            : Electronica
    TPE3            : Au5
    TRCK            : 1/1
    TDRL            : 2014
    TPE2            : Au5,Tasha Baxter
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: isommp42
    TSSE            : Lavf56.4.100
    Stream #0:0: Audio: mp3 (libmp3lame), 44100 Hz, stereo, s16p, 192 kb/s
    Metadata:
      encoder         : Lavc56.1.100 libmp3lame
Stream mapping:
  Stream #0:0 -> #0:0 (mp3 (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
[silencedetect @ 0000000004398f40] silence_start: -0.00628118
[silencedetect @ 0000000004398f40] silence_end: 3.21413 | silence_duration: 3.22
041
[silencedetect @ 0000000004398f40] silence_start: 343.844
[libmp3lame @ 00000000043b2940] Trying to remove 1152 samples, but the queue is
empty
size=    8223kB time=00:05:50.79 bitrate= 192.0kbits/s
video:0kB audio:8222kB subtitle:0kB other streams:0kB global headers:0kB muxing
overhead: 0.011485%

    The generated audio file however still has the original length without any silence removed. See the following images: http://i.imgur.com/nVxe5lX.png

    Any help is appreciated!

    EDIT: Alright, silence detect is only DETECTING the silence. Not removing it. I will try to post a solution for this.

  • ffmpeg silence detect not properly working

    6 septembre 2014, par Zahlii

    I am trying to use the following command with the latest ffmpeg build to remove silence from my .mp3 files:

    ffmpeg -i SILENCE.mp3 -af silencedetect=n=-50dB:d=1 -y -ab 192k  SILENCE_OUT.mp3

    However, the following output is produced:

    ffmpeg version N-66154-g1654ca7 Copyright (c) 2000-2014 the FFmpeg developers
  built on Sep  5 2014 22:10:38 with gcc 4.8.3 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
le-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --
enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-lib
modplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrw
b --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinge
r --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --en
able-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis
 --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-
libx265 --enable-libxavs --enable-libxvid --enable-decklink --enable-zlib
  libavutil      54.  7.100 / 54.  7.100
  libavcodec     56.  1.100 / 56.  1.100
  libavformat    56.  4.100 / 56.  4.100
  libavdevice    56.  0.100 / 56.  0.100
  libavfilter     5.  1.100 /  5.  1.100
  libswscale      3.  0.100 /  3.  0.100
  libswresample   1.  1.100 /  1.  1.100
  libpostproc    53.  0.100 / 53.  0.100
Input #0, mp3, from 'SILENCE.mp3':
  Metadata:
    title           : Snowblind (Featuring Tasha Baxter)
    artist          : Au5
    album           : Snowblind (Featuring Tasha Baxter)
    genre           : Electronica
    performer       : Au5
    track           : 1/1
    date            : 2014
    album_artist    : Au5,Tasha Baxter
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: isommp42
    encoder         : Lavf55.42.100
  Duration: 00:05:50.80, start: 0.025057, bitrate: 192 kb/s
    Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 192 kb/s
Output #0, mp3, to 'SILENCE_OUT.mp3':
  Metadata:
    TIT2            : Snowblind (Featuring Tasha Baxter)
    TPE1            : Au5
    TALB            : Snowblind (Featuring Tasha Baxter)
    TCON            : Electronica
    TPE3            : Au5
    TRCK            : 1/1
    TDRL            : 2014
    TPE2            : Au5,Tasha Baxter
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: isommp42
    TSSE            : Lavf56.4.100
    Stream #0:0: Audio: mp3 (libmp3lame), 44100 Hz, stereo, s16p, 192 kb/s
    Metadata:
      encoder         : Lavc56.1.100 libmp3lame
Stream mapping:
  Stream #0:0 -> #0:0 (mp3 (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
[silencedetect @ 0000000004398f40] silence_start: -0.00628118
[silencedetect @ 0000000004398f40] silence_end: 3.21413 | silence_duration: 3.22
041
[silencedetect @ 0000000004398f40] silence_start: 343.844
[libmp3lame @ 00000000043b2940] Trying to remove 1152 samples, but the queue is
empty
size=    8223kB time=00:05:50.79 bitrate= 192.0kbits/s
video:0kB audio:8222kB subtitle:0kB other streams:0kB global headers:0kB muxing
overhead: 0.011485%

    The generated audio file however still has the original length without any silence removed. See the following images: http://prntscr.com/4k52m5

    Any help is appreciated!

  • How to let ffplay block the rtmps playback on unsafety certificate case

    5 septembre 2014, par Yehudi

    I use the ffplay to playback live stream thru rtmps protocol. And I see whether the streaming server uses the CA signed certificate or self-signed certificate, ffplay always accepts them and playback .

    How to configure ffplay or any compile option to set ffplay to reject the streaming from server that applies self-signed certificate ?

  • How to specify a path for output file in ffmpeg ?

    5 septembre 2014, par Karthikeya Vaidya

    I am trying to give a path for output file, but ffmpeg is giving an error stating "Unable to find a suitable output format for '/kcs/eng/: Invalid argument. where as it is accepting the full path of input file.

    $in_path = "D:/kcs/kan/video.vob";
$out_path = "E:/kcs/eng/video.mp4";

ffmpeg -i $in_path -loglevel error -c:v libx264 -c:a aac -strict experimental $out_Path

    Can any1 please help me out in this.. Thanks in advance...

  • Streaming MP4 frames to HTML5, what am I doing wrong ?

    5 septembre 2014, par mczarnek

    Currently I am generating a MP4 Bitstream using Intel's Media SDK library, which uses ffmpeg underneath the covers. I can generate a mp4 file, and play it and it works.

    However, when I try to stream that mp4 across the network, it doesn't play within the HTML5 video player, as tested within Chrome, Firefox, or IE.

    This much is sent back and forth across the network:

    Sent by Chrome:
GET / HTTP/1.1
Host: localhost:8085
Connection: keep-alive
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/32.0.1700.102 Safari/537.36
Accept-Encoding: identity;q=1, *;q=0
Accept: */*
Accept-Language: en-US,en;q=0.8
Range: bytes=0-

From my video player:
HTTP/1.1 200 OK
Server: Microsoft-HTTPAPI/2.0
Date: Thu, 09 Jan 2014 17:28:14 GMT
Content-type: video/mp4

    After this, I send a newline, and all the video frames, one after another, while listening to see if I receive anything back from the browser.

    Then nothing happens. Any suggestions to get this playing video? Thank you!

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