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• FFMPEG - Width/ Height Not Divisible by 2 (Scaling to Generate MBR Output)

  15 avril 2020, par Sanjeev Pandey

  I am trying to generate multilple variants of videos in my library (Mp4 formats) and have renditions planned ranging from 1080p to 240p and popular sizes in between. For that I am taking a video with a AxB resolution and then running through a code (on bash) which scales them to desired following sizes - 
426x240
640x360
842x480
1280x720
1920x1080, with different bitrates of course, and then saves as Mp4 again.

  



  Now, this works just fine if source video has height and width divisible by 2, but code breaks on the following line for the videos with odd width and height :
-vf scale=w=${width}:h=${height}:force_original_aspect_ratio=decrease"

  



  Where 'width' and 'height' are the desired (and hardcoded) for every iteration : E.g. "426x240", and "640x360"

  



  The Error :
[libx264 @ 00000187da2a1580] width not divisible by 2 (639x360)
Error initializing output stream 1:0 -- Error while opening encoder for output stream #1:0 - maybe incorrect parameters such as bit_rate, rate, width or height

  



  Now approaches those are explained in this one doesn't work for me since I am scaling - FFMPEG (libx264) "height not divisible by 2"

  



  And, I tried this one too but it seems all qualities are getting the same size -ffmpeg : width not divisible by 2 (when keep proportions)

  



  


  

  • This is how I tried to use this one : scale='bitand(oh*dar,65534)':'min(${height},ih)'

  


  


  



  Kindly suggest how to solve this, keeping in view that :
1. I have a very large library and I can't do manual change for every video
2. I need to scale the video and keep the aspect ratio

  



  Thanks !

  



  PS : [Edit] One way that I can see is padding all of the odd height/ weight videos using a second script in advance. This however doubles my work time and load. I would prefer to keep it in single script. This is the script I see that I can use for padding :
```ffmpeg -r 24 -i -vcodec libx264 -y -an -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2"`` (from : FFMPEG (libx264) "height not divisible by 2")

  


• FFMPEG - Width/ Height Not Divisible by 2 (Scaling to Generate MBR Output)

  15 avril 2020, par Sanjeev Pandey

  I am trying to generate multilple variants of videos in my library (Mp4 formats) and have renditions planned ranging from 1080p to 240p and popular sizes in between. For that I am taking a video with a AxB resolution and then running through a code (on bash) which scales them to desired following sizes - 
426x240
640x360
842x480
1280x720
1920x1080, with different bitrates of course, and then saves as Mp4 again.

  



  Now, this works just fine if source video has height and width divisible by 2, but code breaks on the following line for the videos with odd width and height :
-vf scale=w=${width}:h=${height}:force_original_aspect_ratio=decrease"

  



  Where 'width' and 'height' are the desired (and hardcoded) for every iteration : E.g. "426x240", and "640x360"

  



  The Error :
[libx264 @ 00000187da2a1580] width not divisible by 2 (639x360)
Error initializing output stream 1:0 -- Error while opening encoder for output stream #1:0 - maybe incorrect parameters such as bit_rate, rate, width or height

  



  Now approaches those are explained in this one doesn't work for me since I am scaling - FFMPEG (libx264) "height not divisible by 2"

  



  And, I tried this one too but it seems all qualities are getting the same size -ffmpeg : width not divisible by 2 (when keep proportions)

  



  


  

  • This is how I tried to use this one : scale='bitand(oh*dar,65534)':'min(${height},ih)'

  


  


  



  Kindly suggest how to solve this, keeping in view that :
1. I have a very large library and I can't do manual change for every video
2. I need to scale the video and keep the aspect ratio

  



  Thanks !

  



  PS : [Edit] One way that I can see is padding all of the odd height/ weight videos using a second script in advance. This however doubles my work time and load. I would prefer to keep it in single script. This is the script I see that I can use for padding :
```ffmpeg -r 24 -i -vcodec libx264 -y -an -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2"`` (from : FFMPEG (libx264) "height not divisible by 2")

  


• PowerShell script FFMPEG HLS with Multiple Audio and Sub Tracks

  5 mai 2020, par LordFenixNC

  I am Currently using a custom script to convert video files to multi resolution HLS. I have just switched to a Newer web player that will allow me to support Subtitle Tracks and Audio tracks selections. I am having a hard time figuring out how to edit my script to take a MKV and strip all the audio sources and subtitle sources and adding it to the INDEX.M3U8

  



  My Current Script

  



  $sw = [Diagnostics.Stopwatch]::StartNew()
$files = Get-ChildItem ${Get-Location}
$loco = Get-Location
$p1 = Join-Path -Path $loco -ChildPath "/out"
echo $p1
New-Item -ItemType Directory -Force -Path $p1
foreach ($f in $files){ 
$p2 = Join-Path -Path $loco -ChildPath "/out/" | Join-Path -ChildPath $f
$sb = [System.Text.StringBuilder]::new();
[void]$sb.AppendLine( '#EXTM3U' )
[void]$sb.AppendLine( '#EXT-X-VERSION:3' )
[void]$sb.AppendLine( '#EXT-X-STREAM-INF:BANDWIDTH=800000,RESOLUTION=640x360' )
[void]$sb.AppendLine( '360p.m3u8' )
[void]$sb.AppendLine( '#EXT-X-STREAM-INF:BANDWIDTH=1400000,RESOLUTION=842x480' )
[void]$sb.AppendLine( '480.m3u8' )

New-Item -ItemType Directory -Force -Path $p2
$resStr = ffprobe -v error -select_streams v:0 -show_entries stream=height -of csv=s=x:p=0 $f.FullName;
$res = [convert]::ToInt32($resStr)
#ffmpeg -i $f.FullName -c:a copy -vf scale=w=640:h=360:force_original_aspect_ratio=decrease -c:a aac -ar 48000  -rc cqp -qp_p 0 -qp_i 1 -profile:v main -crf 20 -sc_threshold 0 -g 48 -keyint_min 48 -hls_time 4 -hls_playlist_type vod  -b:v 800k -maxrate 856k -bufsize 1200k -b:a 96k -hls_segment_filename out/$f/360p_%03d.ts out/$f/360p.m3u8 -vf scale=w=842:h=480:force_original_aspect_ratio=decrease -c:a aac -ar 48000 -gpu 1 -c:v h264_amf -rc cqp -qp_p 0 -qp_i 1 -profile:v main -crf 20 -sc_threshold 0 -g 48 -keyint_min 48 -hls_time 4 -hls_playlist_type vod -b:v 1400k -maxrate 1498k -bufsize 2100k -b:a 128k -hls_segment_filename out/$f/480p_%03d.ts out/$f/480p.m3u8 -vf  scale=w=1280:h=720:force_original_aspect_ratio=decrease -c:a aac -ar 48000 -gpu 1 -c:v h264_amf -rc cqp -qp_p 0 -qp_i 1 -profile:v main -crf 20 -sc_threshold 0 -g 48 -keyint_min 48 -hls_time 4 -hls_playlist_type vod -b:v 2800k -maxrate 2996k -bufsize 4200k -b:a 128k -hls_segment_filename out/$f/720p_%03d.ts out/$f/720p.m3u8 -vf  scale=w=1920:h=1080:force_original_aspect_ratio=decrease -c:a aac -ar 48000 -gpu 1 -c:v h264_amf -rc cqp -qp_p 0 -qp_i 1 -profile:v main -crf 20 -sc_threshold 0 -g 48 -keyint_min 48 -hls_time 4 -hls_playlist_type vod -b:v 5000k -maxrate 5350k -bufsize 7500k -b:a 192k -hls_segment_filename out/$f/1080p_%03d.ts out/$f/1080p.m3u8
#ffmpeg -hwaccel auto -hwaccel_device 0 -i $f.FullName -c:v h264 -profile:v main -c:a aac -filter:v scale=360:640 -ar 48000  -rc cqp -qp_p 0 -qp_i 1 -profile:v main -crf 23 -sc_threshold 0 -g 48 -b:v 800k -maxrate 856k -bufsize 1200k -b:a 96k  -keyint_min 4 -start_number 0 -hls_time 10 -hls_playlist_type vod  -hls_list_size 0 -f hls -hls_segment_filename out/$f/360p_%03d.ts out/$f/360p.m3u8 
ffmpeg -hwaccel auto -hwaccel_device 0 -i $f.FullName -c:v h264_nvenc -b:v 200k -minrate 100k -maxrate 896k -profile:v main -c:a aac -filter:v scale=-1:360 -start_number 0 -hls_time 10 -hls_list_size 0 -f hls -hls_segment_filename out/$f/360p_%03d.ts out/$f/360p.m3u8 
ffmpeg -hwaccel auto -hwaccel_device 0 -i $f.FullName -c:v h264_nvenc -b:v 1000k -minrate 896k -maxrate 1536k -profile:v main -c:a aac -filter:v scale=-1:480 -start_number 0 -hls_time 10 -hls_list_size 0 -f hls -hls_segment_filename out/$f/480p_%03d.ts out/$f/480p.m3u8
If($res -ge 720) {
    ffmpeg -hwaccel auto -hwaccel_device 0 -i $f.FullName -c:v h264_nvenc -b:v 2232k -minrate 1856k -maxrate 2872k -profile:v main -c:a aac -filter:v scale=-1:720 -start_number 0 -hls_time 10 -hls_list_size 0 -f hls -hls_segment_filename out/$f/720p_%03d.ts out/$f/720p.m3u8
    [void]$sb.AppendLine( '#EXT-X-STREAM-INF:BANDWIDTH=2800000,RESOLUTION=1280x720' )
    [void]$sb.AppendLine( '720p.m3u8' )
}   
If($res -ge 1080) {
    ffmpeg -hwaccel auto -hwaccel_device 0 -i $f.FullName -c:v h264_nvenc -b:v 4632k -minrate 3712k -maxrate 5552k -profile:v main -c:a aac -filter:v scale=-1:1080 -start_number 0 -hls_time 10 -hls_list_size 0 -f hls -hls_segment_filename out/$f/1080p_%03d.ts out/$f/1080p.m3u8
    [void]$sb.AppendLine( '#EXT-X-STREAM-INF:BANDWIDTH=5000000,RESOLUTION=1920x1080' )
    [void]$sb.AppendLine( '1080p.m3u8' )
}

$p3 = Join-Path -Path $p2 -ChildPath "/index.m3u8"
#echo $index | Out-File -Encoding UTF8 -LiteralPath $p3
echo $sb.ToString()
[System.IO.File]::WriteAllLines($p3, $sb.ToString().Trim().replace("`r`n", "`n"))
 }
 $sw.Stop()
 echo $sw.Elapsed