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• Basic Video Player Using Qt And FFmpeg

  7 mars 2016, par Thibaud Auzou

  I am trying to program a little and basic video player using Qt and FFmpeg. I first recompiled Qt to use with Visual Studio 2015.

  Once done I created my MainWindow, the MenuBar, the PushButtons that I needed, etc.

  Now that I wrote the main structure of this little project I am struggling with integrating FFmpeg into it. I believe I am trying to use libavcodec to read a video. But to be honest I am not sure.

  I am quite lost at this point, several hours on Google and still lost.

  While the documentation of Qt was quite easy to handle, the documentation of FFmpeg is kinda vague...

  An of you has an advise regarding FFmpeg ? A good tutorial ?

• How to display progress on user side in FFMPEG transcoding in rails ?

  21 décembre 2015, par Jiggs

  I am using Streamio-ffmpeg to process files. The gem shows the progress of the transcoding in the console. I want to display this progress to the user. Is there anyway of doing this ?

  This is my lib : (Where the transcoding is done)

  file = ::FFMPEG::Movie.new(tmpfile)
  
  
  
  encoded_file = File.join(directory, new_name)
  
  
  
  file.transcode(encoded_file) { |progress| progressing = (progress * 100).round(2); puts "#{progressing} %"; }

  The |progress| progressing = (progress * 100).round(2) ; puts "#progressing %" ; is responsible for printing the progress to the console. Can I display this in my views instead ?

  Output on console is :-

  I, [2015-12-21T12:48:55.322814 #19642]  INFO -- : Running transcoding...
  
  ffmpeg -y -i /home/tps/sites/demo_projects/blog/public/uploads/tmp/1450682335-19642-6992/tmpfile  /home/tps/sites/demo_projects/blog/public/uploads/tmp/1450682335-19642-6992/mp4_SampleVideo_1080x720_5mb.mp4
  
  
  
  0.0 %
  
  
  
  6.63 %
  
  
  
  9.57 %
  
  
  
  11.4 %
  
  
  
  13.46 %
  
  
  
  15.86 %
  
  
  
  18.3 %
  
  
  
  21.64 %
  
  
  
  25.03 %
  
  
  
  28.61 %
  
  
  
  32.09 %
  
  
  
  36.62 %
  
  
  
  43.29 %
  
  
  
  48.6 %
  
  
  
  53.23 %
  
  
  
  57.69 %
  
  
  
  61.68 %
  
  
  
  66.49 %
  
  
  
  70.1 %
  
  
  
  72.91 %
  
  
  
  75.75 %
  
  
  
  79.07 %
  
  
  
  83.73 %
  
  
  
  88.81 %
  
  
  
  93.07 %
  
  
  
  96.72 %
  
  
  
  99.05 %
  
  
  
  99.97 %
  
  
  
  100.0 %
  
  
  
  I, [2015-12-21T12:49:10.058592 #19642]  INFO -- : Transcoding of /home/tps/sites/demo_projects/blog/public/uploads/tmp/1450682335-19642-6992/tmpfile to /home/tps/sites/demo_projects/blog/public/uploads/tmp/1450682335-19642-6992/mp4_SampleVideo_1080x720_5mb.mp4 succeeded

  I tried out "using include ActionController::Live" but i don’t get any proper result. I don’t know to how to use "include ActionController::Live" in this situation.

• ffmpeg -acodec not found but installed

  16 décembre 2015, par nadermx

  I am trying to change a video url from youtube to a mp3 via ffmpeg so I can stream the response in Ubuntu 14.04

   ffmpeg -i https://r7---sn-ab5l6ne7.googlevideo.com/videoplayback?mime=video%2Fmp4&requiressl=yes&signature=99EFD8B801C44EA1221B5D653B2EB30C4CE962C6.6CD123737E54A11B0E5B16BC7AA2572688B091D9&source=youtube&mn=sn-ab5l6ne7&upn=2c_sPjXh1FE&itag=22&pl=16&mt=1450291179&ms=au&expire=1450312883&mm=31&id=o-ABMSf6BaCXTeSmFM41vs85JJ2rmcdeD6CVriiGKVMDlG&sver=3&ratebypass=yes&ip=68.9.161.152&sparams=dur%2Cid%2Cinitcwndbps%2Cip%2Cipbits%2Citag%2Clmt%2Cmime%2Cmm%2Cmn%2Cms%2Cmv%2Cpl%2Cratebypass%2Crequiressl%2Csource%2Cupn%2Cexpire&key=yt6&lmt=1429526600478294&dur=6.385&fexp=9416126%2C9420452%2C9422596%2C9423459%2C9423662&mv=m&ipbits=0&initcwndbps=2147500 -acodec liblamemp3 -f mp3 shave.mp3

  But when I run this command, I end up with this issue

  ffmpeg -i https://r7---sn-ab5l6ne7.googlevideo.com/videoplayback?mime=video%2Fmp4&requiressl=yes&signature=99EFD8B801C44EA1221B5D653B2EB30C4CE962C6.6CD123737E54A11B0E5B16BC7AA2572688B091D9&source=youtube&mn=sn-ab5l6ne7&upn=2c_sPjXh1FE&itag=22&pl=16&mt=1450291179&ms=au&expire=1450312883&mm=31&id=o-ABMSf6BaCXTeSmFM41vs85JJ2rmcdeD6CVriiGKVMDlG&sver=3&ratebypass=yes&ip=68.9.161.152&sparams=dur%2Cid%2Cinitcwndbps%2Cip%2Cipbits%2Citag%2Clmt%2Cmime%2Cmm%2Cmn%2Cms%2Cmv%2Cpl%2Cratebypass%2Crequiressl%2Csource%2Cupn%2Cexpire&key=yt6&lmt=1429526600478294&dur=6.385&fexp=9416126%2C9420452%2C9422596%2C9423459%2C9423662&mv=m&ipbits=0&initcwndbps=2147500 -acodec liblamemp3 -f mp3 shave.mp3[19] 8925
  
  [20] 8926
  
  [21] 8927
  
  [22] 8928
  
  [23] 8929
  
  [24] 8930
  
  [25] 8931
  
  [26] 8932
  
  [27] 8933
  
  [28] 8934
  
  [29] 8935
  
  [30] 8936
  
  [31] 8937
  
  [32] 8938
  
  [33] 8939
  
  [34] 8940
  
  [35] 8941
  
  [36] 8942
  
  [37] 8943
  
  [38] 8944
  
  [39] 8945
  
  [40] 8946
  
  [41] 8947
  
  ffmpeg version git-2015-12-10-3652dd5 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)
  
    configuration: --enable-gpl --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-openssl --enable-nonfree --enable-version3 --enable-gnutls
  
    libavutil      55. 10.100 / 55. 10.100
  
    libavcodec     57. 17.100 / 57. 17.100
  
    libavformat    57. 19.100 / 57. 19.100
  
    libavdevice    57.  0.100 / 57.  0.100
  
    libavfilter     6. 20.100 /  6. 20.100
  
    libswscale      4.  0.100 /  4.  0.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  -acodec: command not found
  
  [20]   Done                    requiressl=yes
  
  [21]   Done                    signature=99EFD8B801C44EA1221B5D653B2EB30C4CE962C6.6CD123737E54A11B0E5B16BC7AA2572688B091D9
  
  [22]   Done                    source=youtube
  
  [23]   Done                    mn=sn-ab5l6ne7
  
  [24]   Done                    upn=2c_sPjXh1FE
  
  [25]   Done                    itag=22
  
  [26]   Done                    pl=16
  
  [27]   Done                    mt=1450291179
  
  [28]   Done                    ms=au
  
  [29]   Done                    expire=1450312883
  
  [30]   Done                    mm=31
  
  [31]   Done                    id=o-ABMSf6BaCXTeSmFM41vs85JJ2rmcdeD6CVriiGKVMDlG
  
  [32]   Done                    sver=3
  
  [33]   Done                    ratebypass=yes
  
  [34]   Done                    ip=68.9.161.152
  
  [35]   Done                    sparams=dur%2Cid%2Cinitcwndbps%2Cip%2Cipbits%2Citag%2Clmt%2Cmime%2Cmm%2Cmn%2Cms%2Cmv%2Cpl%2Cratebypass%2Crequiressl%2Csource%2Cupn%2Cexpire
  
  
  
  [19]+  Stopped                 ffmpeg -i https://r7---sn-ab5l6ne7.googlevideo.com/videoplayback?mime=video%2Fmp4
  
  [20]   Done                    requiressl=yes
  
  [21]   Done                    signature=99EFD8B801C44EA1221B5D653B2EB30C4CE962C6.6CD123737E54A11B0E5B16BC7AA2572688B091D9
  
  [22]   Done                    source=youtube
  
  [23]   Done                    mn=sn-ab5l6ne7
  
  [24]   Done                    upn=2c_sPjXh1FE
  
  [25]   Done                    itag=22
  
  [26]   Done                    pl=16
  
  [27]   Done                    mt=1450291179
  
  [28]   Done                    ms=au
  
  [29]   Done                    expire=1450312883
  
  [30]   Done                    mm=31
  
  [31]   Done                    id=o-ABMSf6BaCXTeSmFM41vs85JJ2rmcdeD6CVriiGKVMDlG
  
  [32]   Done                    sver=3
  
  [33]   Done                    ratebypass=yes
  
  [34]   Done                    ip=68.9.161.152
  
  [35]   Done                    sparams=dur%2Cid%2Cinitcwndbps%2Cip%2Cipbits%2Citag%2Clmt%2Cmime%2Cmm%2Cmn%2Cms%2Cmv%2Cpl%2Cratebypass%2Crequiressl%2Csource%2Cupn%2Cexpire
  
  [36]   Done                    key=yt6
  
  [37]   Done                    lmt=1429526600478294
  
  [38]   Done                    dur=6.385
  
  [39]   Done                    fexp=9416126%2C9420452%2C9422596%2C9423459%2C9423662
  
  [40]   Done                    mv=m
  
  [41]   Done                    ipbits=0

  Now I am not sure why it keeps spitting this out. I have tried to do a streaming output with ’-’ variable as well and still no avail.

  I have installed ffmpeg, and all the dependencies. I used this bash script to compile ffmpeg. I have been trying for days to get this working and still cannot seem to figure it out.