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• Master playlist generate points to only one resolution among multiple

  25 avril 2019, par Parthib Dutta

  I am trying to convert one mp4 movie to multiple bitrate HLS . The individual resolutions are generating fine with their own playlists . But the master playlist includes only one resolution .

  ffmpeg -hide_banner -re -i video.mp4 -master_pl_name master.m3u8    ^
  
    -vf scale=w=640:h=-2 -c:a aac -ar 48000 -c:v h264 -profile:v main -crf 20 -sc_threshold 0 -g 48 -keyint_min 48 -hls_time 4   -b:v 800k -maxrate 856k -bufsize 1200k -b:a 96k -hls_segment_filename D:\xampp\htdocs\streaming-demo\360p_%%03d.ts  D:\xampp\htdocs\streaming-demo\360p_%v.m3u8 ^
  
    -vf scale=w=842:h=-2 -c:a aac -ar 48000 -c:v h264 -profile:v main -crf 20 -sc_threshold 0 -g 48 -keyint_min 48 -hls_time 4  -b:v 1400k -maxrate 1498k -bufsize 2100k -b:a 128k -hls_segment_filename D:\xampp\htdocs\streaming-demo\480p_%%03d.ts  D:\xampp\htdocs\streaming-demo\480p_%v.m3u8 ^
  
    -vf scale=w=1280:h=-2 -c:a aac -ar 48000 -c:v h264 -profile:v main -crf 20 -sc_threshold 0 -g 48 -keyint_min 48 -hls_time 4  -b:v 2800k -maxrate 2996k -bufsize 4200k -b:a 128k -hls_segment_filename D:\xampp\htdocs\streaming-demo\720p_%%03d.ts  D:\xampp\htdocs\streaming-demo\720p_%v.m3u8 ^
  
    -vf scale=w=1920:h=-2 -c:a aac -ar 48000 -c:v h264 -profile:v main -crf 20 -sc_threshold 0 -g 48 -keyint_min 48 -hls_time 4  -b:v 5000k -maxrate 5350k -bufsize 7500k -b:a 192k -hls_segment_filename D:\xampp\htdocs\streaming-demo\1080p_%%03d.ts  D:\xampp\htdocs\streaming-demo\1080p_%v.m3u8

  It include only the 360p resolution playlist link .

• ffmpeg - convert movie AND show original input (as resized picture-in-picture, top-left corner) in the final output file

  2 octobre 2019, par raven

  this is my first post on this forum, so please be gentle in case I accidentally do trip over any forum rules that I would not know of yet :).

  I would like to apply some color-grading to underwater GoPro footage. To quicker gauge the effect of my color settings (trial-and-error, as of yet), would like to see the original input video stream as a PIP (e.g., scaled down 50%), in the top-left corner of the converted output movie.

  I have one input movie that is going to be color graded. The PIP should use the original as an input, just a scaled-down version of it.

  I would like to use ffmpeg’s -filter_complex option to do the PIP, but all examples I can find on "-filter_complex" would use two already existing movies. Instead, I would like to make the color-corrected stream an on-the-fly input to "-filter_complex", which then renders the PIP.

  Is that doable, all in one go ?

  Both the individual snippets below work fine, I now would like to combine these and skip the creation of an intermediate color-graded video. Your help combining these two steps into one single process is greatly appreciated !

  Thanks in advance,
  raven.

  [existing code snippets (M$ batch files)]
  
  
  
  ::declarations/defines::
  
  set "INPUT="
  
  set "TMP="
  
  set "OUTPUT="
  
  set "FFMPG="
  
  set "QU=9" :: quality settings
  
  
  
  set "CONV='"0 -1 0 -1 5 -1 0 -1 0:0 -1 0 -1 5 -1 0 -1 0:0 -1 0 -1 5 -1 
  
  0 -1 0:0 -1 0 -1 5 -1 0 -1 0'"" :: sharpening convolution filter
  
  
  
  ::color-grading part::
  
  %FFMPG% -i %INPUT% -vf convolution=%CONV%,colorbalance=rs=%rs%:gs=%gs%:bs=%bs%:rm=%rm%:gm=%gm%:bm=%bm%:rh=%rh%:gh=%gh%:bh=%bh% -q:v %QU% -codec:v mpeg4 %TMP%
  
  
  
  ::PIP part::
  
  %FFMPG% -i %INPUT% -i %TMP% -filter_complex "[1]scale=iw/3:ih/3 
  
  [pip]; [0][pip] overlay=main_w-overlay_w-10:main_h-overlay_h-10" -q:v 
  
  %QU% -codec:v mpeg4 %OUTPUT%
  
  
  
  [/existing code]

• Moviepy has issues when concatenating ImageClips of different dimensions

  22 mars 2021, par Lysander Cox

  Example of the issues : https://drive.google.com/file/d/1WxfYtDTD0kc_4WQzzvB6QXkZWo-e2Vuk/view?usp=sharing

  


  Here's the code that led to the issue :

  


  def fragmentConcat(comment, filePrefix):
    finalClips = []
    dirName = filePrefix + comment['id']
    vidClips = [mpy.VideoFileClip(dirName + '/' + file) for file 
                in natsorted(os.listdir(dirName))]
    
    finalClip = mpy.concatenate_videoclips(vidClips, method = "compose")
    finalClips.append(finalClip)
    
    if 'replies' in comment:
        for reply in comment['replies']:
            finalClips += fragmentConcat(reply, filePrefix)
            
    return finalClips

def finalVideoMaker(thread):
    fragmentGen(thread)
    filePrefix = thread['id'] + '/videos/'

    #Clips of comments and their children being read aloud.
    commentClips = []

    for comment in thread['comments']:
        commentClipFrags = fragmentConcat(comment, filePrefix)
        commentClip = mpy.concatenate_videoclips(commentClipFrags, method = "compose")
        commentClips.append(commentClip)

        #1 second of static to separate clips.
        staticVid = mpy.VideoFileClip('assets/static.mp4')
        commentClips.append(staticVid)

    finalVid = mpy.concatenate_videoclips(commentClips)
    finalVid.write_videofile(thread['id'] + '/final.mp4')


  


  I'm certain that these issues appear somewhere in here, because the individual video "fragments" (which are concatenated here) do not exhibit the issue with the clip I showed.

  


  I have tried adding and removing the method = "compose" parameter. It does not seem to have an affect. How can I resolve this ? Thanks.