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• PowerShell progress bar won't display

  28 mai 2021, par Brett

  I'm trying to write my first PowerShell GUI. Basically I'm trying to run a ffmpeg command which is fine and works, but I cannot get the progress bar to run. (I'm brand new to this.) Here is my attempt.

  



  cd C:\Users\brett\Documents\convert
$cmd = 'ffmpeg.exe'
$arg0 = '-i'
$arg1 = 'MASH_01.ts'
$arg2 = '-c:v'
$arg3 = '-c:a'
$arg4 = 'MASH_01.mp4'
$cf = 'copy'
$isFile = 'MASH_01.mp4'
if (-not(Test-Path -Path $isFile) -eq $false) {
  echo "Shit Go"
  del $isFile

      & $cmd $arg0 $arg1 $arg2 $cf $arg3 $cf $arg4
    for ($i = 1; $i -le 100; $i++) {
    Start-Sleep -m 100
    Write-Progress -Activity 'Progress Of The Coversion' -Status "$i Percent Complete" -PercentComplete $i;
    }
} else {
& $cmd $arg0 $arg1 $arg2 $cf $arg3 $cf $arg4
    for ($i = 1; $i -le 100; $i++) {
    Start-Sleep -m 100
    Write-Progress -Activity 'Progress Of The Coversion' -Status "$i Percent Complete" -PercentComplete $i;
    }
}


  



  Update : There is no error output I can see, but the progress bar runs after the file has been processed, not during.

  



  here is my latest attempt.. but now i get ffmpeg saying "m" is not a valid switch

  



  cd C:\Users\brett\Documents\convert
$oldVideo = Get-ChildItem -Include @("*.ts")
Write-Host -ForegroundColor Green -Object $ArgumentList;
# Pause the script until user hits enter
$isFile = 'MASH_01.mp4'
if( -not(Test-Path -Path $isFile) -eq $false) {
  echo "Shit Go"
  del $isFile
  }a
  $tool = ffmpeg.exe
$ArgumentList = '`-i'+' '+'MASH_01.ts'+' '+'-c:v'+' '+'copy'+' '+'-c:a'+' '+'copy'+' '+'MASH_01.mp4';
Invoke-Expression $tool $ArgumentList
for($i = 1; $i -le 100; $i++){
    ffmpeg $ArgumentList -m 100

    Write-Progress -Activity 'Progress Of The Coversion' -Status "$i Percent Complete" -PercentComplete $i 
   `-SecondsRemaining $a -CurrentOperation
   "$i% complete" `

    }


  


• HEVC Muxing/Demuxing Bug

  22 juillet 2022, par Adeel Abbas

  I am trying to mux and then demux an HEVC stream and running into an issue where the reconstructed video is slightly longer than original video.

  


  Using segment muxer, I split video into 6 second segments (video was captured at 6 second IDR intervals so copy filter can work) :

  


  ffmpeg -y -r 24 -i input.mp4 -map 0:v:0? -c copy \
-f segment -segment_time 5 -reset_timestamps 1 ./segments/%05d.mp4


  


  Using concat demuxer, I combine video segments (created in step 1) as follows :

  


  PWD=`pwd`
ffmpeg -y -f concat -safe 0 -i <( echo file ${PWD}'/segments/00000.mp4';  \
echo file ${PWD}'/segments/00001.mp4';  echo file ${PWD}'/segments/00002.mp4';  \
echo file ${PWD}'/segments/00003.mp4';  echo file ${PWD}'/segments/00004.mp4';  \
echo file ${PWD}'/segments/00005.mp4';  echo file ${PWD}'/segments/00006.mp4';  \
echo file ${PWD}'/segments/00007.mp4';  echo file ${PWD}'/segments/00008.mp4';  \
echo file ${PWD}'/segments/00009.mp4';  echo file ${PWD}'/segments/00010.mp4';  \
echo file ${PWD}'/segments/00011.mp4';  echo file ${PWD}'/segments/00012.mp4';  \
echo file ${PWD}'/segments/00013.mp4';  echo file ${PWD}'/segments/00014.mp4';  \
echo file ${PWD}'/segments/00015.mp4';  echo file ${PWD}'/segments/00016.mp4';  \
echo file ${PWD}'/segments/00017.mp4';  echo file ${PWD}'/segments/00018.mp4';  \
echo file ${PWD}'/segments/00019.mp4';  echo file ${PWD}'/segments/00020.mp4';  \
echo file ${PWD}'/segments/00021.mp4';  echo file ${PWD}'/segments/00022.mp4';  \
echo file ${PWD}'/segments/00023.mp4';  echo file ${PWD}'/segments/00024.mp4';  \
echo file ${PWD}'/segments/00025.mp4';  echo file ${PWD}'/segments/00026.mp4';  \
echo file ${PWD}'/segments/00027.mp4';  echo file ${PWD}'/segments/00028.mp4';  \
echo file ${PWD}'/segments/00029.mp4';  echo file ${PWD}'/segments/00030.mp4';  \
echo file ${PWD}'/segments/00031.mp4';  echo file ${PWD}'/segments/00032.mp4';  \
echo file ${PWD}'/segments/00033.mp4';  echo file ${PWD}'/segments/00034.mp4';  \
echo file ${PWD}'/segments/00035.mp4';  echo file ${PWD}'/segments/00036.mp4';  \
echo file ${PWD}'/segments/00037.mp4'; ) -map 0 -c copy -r 24 -brand mp42 \
-video_track_timescale 600 -tag:v hvc1 output.mp4


  


  When I run example file on above test, output file is approximately 3 seconds shorter than input file (and has a frame rate of 24.33 as opposed to 24 for original).

  


  Script to reproduce bug, along with sample video file is available here

  


• FFmpeg, how to skip late input ?

  14 novembre 2017, par user3343357

  I’m running ffmpeg to display incoming stream on a Decklink BlackMagic card with the following command line :

  ffmpeg -y -f ourFmt -probesize 32 -i - -f decklink -preset ultrafast 
  
     -pix_fmt uyvy422 -s 1920x1080 -r 30 -af volume=0.1 -max_delay 10000 
  
       DeckLink Mini Monitor

  Basically I get the video over the internet by UDP and stream it to ffmpeg stdin. Both audio and video streams have pts and dts and are fully in sync, if the connection is good there is no problems.

  However if there are issues with the connection i start getting errors, sometimes the video delay grows significantly, and audio stops working.
  The errors i get are :

  ffmpeg : [decklink @ 0x26cc600] There are not enough buffered video
  frames. Video may misbehave ! ffmpeg : [decklink @ 0x26cc600] There’s no
  buffered audio. Audio will misbehave ! ffmpeg : Last message
  repeated 4 times ffmpeg : [decklink @ 0x26cc600] There are not enough
  buffered video frames. Video may misbehave ! ffmpeg : [decklink @
  0x26cc600] There’s no buffered audio. Audio will misbehave ! ffmpeg :
  Last message repeated 3 times ffmpeg : frame= 5204 fps= 30 q=-0.0
  size=N/A time=00:02:53.76 bitrate=N/A dup=385 drop=5 speed=0.993x
  ffmpeg : [decklink @ 0x26cc600] There’s no buffered audio. Audio will
  misbehave ! ffmpeg : Last message repeated 18 times ffmpeg :
  [decklink @ 0x26cc600] There are not enough buffered video frames.
  Video may misbehave ! ffmpeg : [decklink @ 0x26cc600] There’s no
  buffered audio. Audio will misbehave !

  The problem is when the connection is back to normal, the video keeps misbehaving until I restart the stream. What I want to do is for FFmpeg to skip to the content of the last second and play synchronized video from there, drop all the late data in between, is it possible ?