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Sur d’autres sites (12337)

  • ffmpeg output parse in batch script

    5 juin 2022, par vlad2005

    I am totally unfamiliar with scripts in Windows, but are forced to use such a script. I would like someone to help me with the following problem. I want to process the output from ffmpeg command to save information about access an webcam to be used later.
More precisely command is following :

    



    ffmpeg -stats -hide_banner -list_devices true -f dshow -i dummy


    



    and output is like this :

    



    [dshow @ 02cec400] DirectShow video devices (some may be both video and audio devices)
[dshow @ 02cec400]  "Microsoft LifeCam Studio"
[dshow @ 02cec400]     Alternative name "@device_pnp_\\?\usb#vid_045e&pid_0772&mi_00#6&2a15e69b&0&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global"
[dshow @ 02cec400] DirectShow audio devices
[dshow @ 02cec400]  "Desktop Microphone (3- Studio -"
[dshow @ 02cec400]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Desktop Microphone (3- Studio -"
[dshow @ 02cec400]  "Line In (High Definition Audio "
[dshow @ 02cec400]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Line In (High Definition Audio "
[dshow @ 02cec400]  "Microphone (High Definition Aud"
[dshow @ 02cec400]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Microphone (High Definition Aud"


    



    Typically, the first two occurence for ”Alternative name” from DirectShow correspond to video and audio, so for simplicity I want these two information saved in two variables.
In this example is :

    



    @device_pnp_\\?\usb#vid_045e&pid_0772&mi_00#6&2a15e69b&0&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global


    



    and

    



    @device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Desktop Microphone (3- Studio -


    



    Can someone more experienced to help me with this task ?
Thanks in advance !

    


  • efficiently compressing an AVI video for PowerPoint

    3 juillet 2020, par brownfox
     I have a few AVI videos of very high bit-rate ( 6.0 Second video is 72 MB in size ). I want to put these videos in a Microsoft PowerPoint presentation, and since there are a few 10 such videos the size of the presentation file is getting too high. 


    


    I want to compress these videos to have a reasonable size. I used ffmpeg to compress these videos. I used the command
ffmpeg -i input.avi -vcodec msmpeg4v2 output.avi
and it gave me a compressed video of size 9.0 MB. But these new videos are not playing smoothly in Powerpoint (they are playing in other media players though).

    


    it is playing with hiccups. I assume I compressed the video with wrong parameter/encoding making it difficult to play.

    


    Can anyone suggest me the optimum parameter/arguments to use with FFmpeg in compressing these videos ? The output of ffmpeg -i input.avi is given here.

    


    ffmpeg version 2.8.15-0ubuntu0.16.04.1 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609
  configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv
  libavutil      54. 31.100 / 54. 31.100
  libavcodec     56. 60.100 / 56. 60.100
  libavformat    56. 40.101 / 56. 40.101
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 40.101 /  5. 40.101
  libavresample   2.  1.  0 /  2.  1.  0
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  2.101 /  1.  2.101
  libpostproc    53.  3.100 / 53.  3.100
[mjpeg @ 0x23154c0] Changeing bps to 8
Input #0, avi, from '11_stte_frst_mode.avi':
  Metadata:
    encoder         : Lavf56.40.101
  Duration: 00:00:05.02, start: 0.000000, bitrate: 120249 kb/s
    Stream #0:0: Video: mjpeg (MJPG / 0x47504A4D), yuvj422p(pc, bt470bg/unknown/unknown), 3200x2464, 120629 kb/s, 60 fps, 60 tbr, 60 tbn, 60 tbc





    


    I'm using Ubuntu 16.0, I have also a Windows machine. But it will be easier if I can fix in Ubuntu.

    


    The details of the output file is this,

    


    ffmpeg version 2.8.15-0ubuntu0.16.04.1 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609
  configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv
  libavutil      54. 31.100 / 54. 31.100
  libavcodec     56. 60.100 / 56. 60.100
  libavformat    56. 40.101 / 56. 40.101
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 40.101 /  5. 40.101
  libavresample   2.  1.  0 /  2.  1.  0
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  2.101 /  1.  2.101
  libpostproc    53.  3.100 / 53.  3.100
Input #0, avi, from '../11_stte_frst.avi':
  Metadata:
    encoder         : Lavf56.40.101
  Duration: 00:00:05.02, start: 0.000000, bitrate: 14859 kb/s
    Stream #0:0: Video: msmpeg4v2 (MP42 / 0x3234504D), yuv420p, 3200x2464, 14887 kb/s, 60 fps, 60 tbr, 60 tbn, 60 tbc




    


  • Can't obtain information with ffmpeg from Smooth Streaming Manifest file

    11 juillet 2020, par albertoiNET

    I'm trying to get details for a stream of protocol Microsoft Smooth Streaming, with ffmpeg tools (ffprobe and ffplay) but when I run the next command :

    



    ffprobe -i http://b31282.cdn.telefonica.com/31282/Manifest


    



    I obtain this :

    



    http://b31282.cdn.telefonica.com/31282/Manifest: Invalid data found when processing input


    



    I assume that this Manifest file is correct and complies with standards of Smooth Streaming . This is a brief extract of Manifest file :

    



    <smoothstreamingmedia majorversion="2" minorversion="0" duration="0" timescale="10000000" islive="TRUE" lookaheadfragmentcount="2" dvrwindowlength="6000000000" canseek="TRUE" canpause="TRUE">&#xA;  <protection>&#xA;    <protectionheader systemid="9a04f079-9840-4286-ab92-e65be0885f95">oioAAAIAAQCUAjwAV...</protectionheader>&#xA;  </protection>&#xA;  <streamindex type="audio" language="esp" subtype="" chunks="0" timescale="10000000" url="QualityLevels({bitrate})/Fragments(audio_esp={start time})"></streamindex>&#xA;  <streamindex type="video" language="" subtype="" chunks="0" timescale="10000000" url="QualityLevels({bitrate})/Fragments(video={start time})"></streamindex>&#xA;</smoothstreamingmedia>&#xA;

    &#xA;&#xA;

    Is a Fedora 21 and ffmpeg version and configuration is :

    &#xA;&#xA;

    ffmpeg version git-2015-02-27-d490b26&#xA;configuration: --enable-gpl --enable-nonfree --enable-libfdk_aac --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264&#xA;libavutil         54. 19.100         &#xA;libavcodec        56. 26.100          &#xA;libavformat       56. 23.105           &#xA;libavdevice       56.  4.100                   &#xA;libavfilter        5. 11.102          &#xA;libswscale         3.  1.101        &#xA;libswresample      1.  1.100           &#xA;libpostproc       53.  3.100 &#xA;

    &#xA;&#xA;

    PD : I prefer use only ffmpeg tool

    &#xA;&#xA;

    PD2 : Same thing with a Microsoft Smooth Streaming Manifest file :

    &#xA;&#xA;

    ffmpeg -i http://mediadl.microsoft.com/mediadl/iisnet/smoothmedia/Experience/BigBuckBunny_720p.ism/Manifest&#xA;Invalid data found when processing input&#xA;

    &#xA;&#xA;

    Thanks for all

    &#xA;

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