Recherche avancée

Sur d’autres sites (5736)

• FFMPEG screen grab of windows desktop and then exporting to multiple bandwidth ts and m3u8 files with master playlist

  26 juillet 2018, par Tank Daniels

  Forgive me as this is my first post as I’m really stuck and need help. My boss needs me to screen capture a windows desktop as input and be able to output at least four outputs dependent on bandwidth. Each output "Stream"(im guessing is the right terminology) must have its own .ts files and .m3u8 files, along with a master m3u8 playlist that lists the four individual m3u8 files.

  Every attempt ive made only produces a master m3u8 file with a single listing of an output stream. (Code enclosed below).

  The end result I need to produce is to have a master m3u8 that can go into a webpage that can stream mp4 hls of the users screen grab and that video output will be changed dependant upon the users bandwidth available. If you can please help me with any advice I will be eternally grateful as I need to impress my new boss in my new job, and I’ve been working on this for ages now with no joy.

  Example :
  This is what I need it to look like.

  What the M3U8 needs to look like

  Example :
  This is what it actually looks like now.

  What the current M3U8 actually looks like when i run my code

  Below is the code I am currently using. Please help.

  ffmpeg -f dshow -i video="UScreenCapture":audio="virtual-audio-capturer" -master_pl_name master.m3u8 -master_pl_publish_rate 30 -tune fastdecode -vf scale=w=640:h=360:force_original_aspect_ratio=decrease -c:a aac -ar 48000 -c:v h264 -crf 20 -sc_threshold 0 -g 48 -keyint_min 48 -hls_time 4 -hls_playlist_type vod  -b:v 800k -maxrate 856k -bufsize 1200k -b:a 96k -hls_segment_filename 360p_%03d.ts 360p.m3u8 -master_pl_name master.m3u8 -master_pl_publish_rate 30 -vf scale=w=842:h=480:force_original_aspect_ratio=decrease -c:a aac -ar 48000 -c:v h264 -crf 20 -sc_threshold 0 -g 48 -keyint_min 48 -hls_time 4 -hls_playlist_type vod -b:v 1400k -maxrate 1498k -bufsize 2100k -b:a 128k -hls_segment_filename 480p_%03d.ts 480p.m3u8 -master_pl_name master.m3u8 -master_pl_publish_rate 30 -vf scale=w=1280:h=720:force_original_aspect_ratio=decrease -c:a aac -ar 48000 -c:v h264 -crf 20 -sc_threshold 0 -g 48 -keyint_min 48 -hls_time 4 -hls_playlist_type vod -b:v 2800k -maxrate 2996k -bufsize 4200k -b:a 128k -hls_segment_filename 720p_%03d.ts 720p.m3u8 -master_pl_name master.m3u8 -master_pl_publish_rate 30 -vf scale=w=1920:h=1080:force_original_aspect_ratio=decrease -c:a aac -ar 48000 -c:v h264 -crf 20 -sc_threshold 0 -g 48 -keyint_min 48 -hls_time 4 -hls_playlist_type vod -b:v 5000k -maxrate 5350k -bufsize 7500k -b:a 192k -hls_segment_filename 1080p_%03d.ts 1080p.m3u8

  Many Thanks for looking. Chris.

• Revision 663916cea7 : SVC improvements These changes were originally made in the Stratacaster team-re

  12 octobre 2013, par Ivan Maltz

  Changed Paths :
   Modify /libs.mk

  
   Add /test/svc_test.cc

  
   Modify /test/test.mk

  
   Modify /vp9/common/vp9_onyx.h

  
   Modify /vp9/encoder/vp9_onyx_if.c

  
   Modify /vp9/vp9_cx_iface.c

  
   Modify /vp9_spatial_scalable_encoder.c

  
   Modify /vpx/exports_enc

  
   Add /vpx/src/svc_encodeframe.c

  
   Add /vpx/svc_context.h

  
   Modify /vpx/vp8cx.h

  
   Modify /vpx/vpx_codec.mk

  
  
  SVC improvements

  These changes were originally made in the Stratacaster team-review repository

  commit e114bffcd82ad74c3696ec58e13c0ac895d6c82d
  Author : Charles 'Buck' Krasic <ckrasic@google.com>
  Date : Mon Oct 14 16:52:13 2013 -0700

  Make dummy frame handling a bit more explicit, fixing bug
  with single layer encodes.

  Squashed commit of the following :

  commit 1ebbfd976c0fadb02bf1ea562a2d0e3f0206daad
  Merge : ac468dd 54e88b7
  Author : Ivan Maltz <ivanmaltz@google.com>
  Date : Fri Oct 11 17:29:58 2013 -0700

  Move SVC code from vp9_spatial_scalable_encoder to libvpx module accessible
  from ffmpeg

  commit 54e88b78b160becc9569fc3c6cb6b0a8c95dc357
  Author : Ivan Maltz <ivanmaltz@google.com>
  Date : Tue Oct 8 09:08:40 2013 -0700

  common svc encoding code for sample app and ffmpeg

  added svc_encodeframe.c, svc_context.h, svc_test.cc

  vp9_spatial_scalable_encoder uses vpx_svc_encode

  commit 5616ec8e2e3d3e8d277333d8a9242f6c70151162
  Merge : 4528014 e29137d
  Author : Ivan Maltz <ivanmaltz@google.com>
  Date : Tue Oct 8 08:47:58 2013 -0700

  Merge branch 'master' into stratacaster

  commit 45280148450b1f3d61e390df8aadedf85cd5bce1
  Merge : bb2b675 1ab60f7
  Author : Sujeevan Rajayogam <sujee@google.com>
  Date : Fri Oct 4 10:22:31 2013 -0700

  Merge branch 'master' into stratacaster

  commit bb2b675e595dc9bfc8551e963edf56800c3aea61
  Author : Sujeevan Rajayogam <sujee@google.com>
  Date : Wed Oct 2 12:37:26 2013 -0700

  Track individual frame sizes and psnrs instead of averages.

  commit c6d303b714795c81e7ceb4173967115c9f8ff5b7
  Merge : fa87df9 3583087
  Author : Sujeevan Rajayogam <sujee@google.com>
  Date : Fri Sep 27 10:05:35 2013 -0700

  Merge branch 'master' into stratacaster

  commit fa87df94fba923d9f7aeb8ae20c6e15f777e00b5
  Merge : bf22d71 3c465af
  Author : Sujeevan Rajayogam <sujee@google.com>
  Date : Thu Sep 26 16:10:31 2013 -0700

  Merge branch 'master' into stratacaster

  commit bf22d7144895a82e0c348ac177c8a261b9e2b88e
  Author : Sujeevan Rajayogam <sujee@google.com>
  Date : Thu Sep 26 11:10:34 2013 -0700

  Parameterized quantizer, 16th scalefactors, more logging, enabled single
  layer encodes to generate baseline.

  commit ceffd7e6025b765f9886b5ea0f324248aa37e327
  Author : Sujeevan Rajayogam <sujee@google.com>
  Date : Thu Sep 19 10:04:49 2013 -0700

  - Include new mode for 3 layer I frame with 5 total layers.
  - Refactor svc api.

  Change-Id : Ie4d775e21e006fa597d884c59488dc999478e9b5

• Error decoding stream invalid data found

  10 avril 2018, par bluemoon odd

  I have a software that first extract a video to jpg photo
  than we can insert any text or image auto in all jpg files
  extracted before than i try to rebuild the video with that images but
  its seems my frames extracted after to insert the text on it and re save the each file again with string option so i will have the output 0 , 1, 2 , 3 , etc.
  But wen i try to rebuild the video its look like the photo are not well encoded, how can i solve this error
  And Here is the image of the ffmpeg error
  ffmpeg error
  this is the code i use to rebuild the video with ffmpeg

  Public Class Form3
  
  Dim frame As Long 'individual frames
  
  Dim tempdir As String = "C:\mediapubisert\" ' images temp directory
  
  
  
  Private Sub SaveFileDialog1_FileOk(sender As Object, e As System.ComponentModel.CancelEventArgs) Handles SaveFileDialog1.FileOk
  
      Dim args As String 'declare args
  
      args = "-r 1/.1 -i " & tempdir & "\%01d.jpg -c:v libx264 -r 30 -pix_fmt yuv420p " & Chr(34) & SaveFileDialog1.FileName & Chr(34) 'set ffmpeg arguments
  
      Dim proc As New Process
  
      Dim proci As New ProcessStartInfo
  
      proci.FileName = My.Application.Info.DirectoryPath & "\ffmpeg.exe"
  
      proci.Arguments = args
  
      proci.WindowStyle = ProcessWindowStyle.Hidden
  
      proci.CreateNoWindow = True
  
      proci.UseShellExecute = False
  
      proc.StartInfo = proci
  
      proc.Start()
  
      Do Until proc.HasExited = True
  
          Me.Text = "Saving"
  
      Loop
  
      Me.Text = "Media Pub Insert"
  
  
  
      MsgBox("Done")
  
  
  
      'IO.Directory.Delete(tempdir, True)
  
  End Sub
  
  
  
  Private Sub renameFilesInFolder()
  
      Dim sourcePath As String = "C:\mediapubisert\"
  
      Dim searchPattern As String = "*.jpg"
  
      Dim i As Integer = 0
  
      For Each fileName As String In Directory.GetFiles(sourcePath, searchPattern, SearchOption.AllDirectories)
  
          File.Move(Path.Combine(sourcePath, fileName), Path.Combine(sourcePath, "" & i & ".JPG"))
  
          i += 1
  
      Next
  
  End Sub
  
  
  
  Private Sub Form3_Load(sender As Object, e As EventArgs) Handles MyBase.Load
  
      If (Not System.IO.Directory.Exists(tempdir)) Then
  
          System.IO.Directory.CreateDirectory(tempdir)
  
      End If
  
      renameFilesInFolder()
  
  End Sub
  
  
  
  Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick
  
  
  
  End Sub
  
  
  
  Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
  
      SaveFileDialog1.ShowDialog()
  
  End Sub
  
  
  
  
  
  Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
  
      renameFilesInFolder()
  
  End Sub
  
  
  
  End Class