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• Wrong duration of the result video when using ffmpeg filter complex concat [closed]

  9 décembre 2023, par Igor Chubin

  I am trying to do a trivial task of concatenating
several segments of the original video/audio
into a new file (and dropping the rest) :

  


      ffmpeg -i bdt.mkv -filter_complex '
    [0:v]trim=start=10.0:end=15.0,setpts=PTS-STARTPTS[0v];
    [0:a]atrim=start=10.0:end=15.0,asetpts=PTS-STARTPTS[0a];
    [0:v]trim=start=65.0:end=70.0,setpts=PTS-STARTPTS[1v];
    [0:a]atrim=start=65.0:end=70.0,asetpts=PTS-STARTPTS[1a];[0v][0a][1v]
    [1a]concat=n=2:v=1:a=1[outv][outa]' -map [outv] -map [outa] out.mp4


  


  When I am trying to watch out.mp4 after that, it has the original duration of bdt.mkv (70 minutes) and not 10 seconds, as I would expect.

  


  What am I doing wrong ?

  


  Update 1.

  


  (exactly as Scott Codez suggested)

  


  The problem is related to the formats. If the output format is mkv too, the problem disappears. But when I use mp4, that I need, the problem persists.

  


• ffmpeg normalized mp3 audio and album art went missing

  29 août 2022, par SomeoneInNeedOfHelp

  I used below ffmpeg command to normalized audio of my songs and the album art is missing after running below command

  


  ffmpeg -i "Original.mp3" -af loudnorm=I=-18:LRA=4:TP=-1 -ar 44100 -map 0:v -b:a 192k "Normalized.mp3"


  


  ffprobe Original.mp3

  


  Input #0, mp3, from 'Original.mp3':
  Metadata:
    encoded_by      : Switch Free Home Version © NCH Software
    comment         :
    disc            : 1
    track           : 0
    album_artist    : Artist
    genre           : Pop
    artist          : Artist
    title           : Song Title
    album           : Song album
    date            : 2001
  Duration: 00:04:15.91, start: 0.000000, bitrate: 200 kb/s
  Stream #0:0: Audio: mp3, 44100 Hz, stereo, fltp, 192 kb/s
  Stream #0:1: Video: mjpeg (Baseline), yuvj420p(pc, bt470bg/unknown/unknown), 1279x1280 [SAR 96:96 DAR 1279:1280], 90k tbr, 90k tbn, 90k tbc (attached pic)
    Metadata:
      title           : thumbnail
      comment         : Cover (front)


  


  ffprobe Normalized.mp3

  


  Input #0, mp3, from 'Original.mp3':
  Metadata:
    encoded_by      : Switch Free Home Version © NCH Software
    comment         :
    disc            : 1
    track           : 0
    album_artist    : Artist
    genre           : Pop
    artist          : Artist
    title           : Song Title
    album           : Song album
    date            : 2001
    encoder         : Lavf58.67.100
Duration: 00:04:15.92, start: 0.025056, bitrate: 265 kb/s
  Stream #0:0: Audio: mp3, 44100 Hz, stereo, fltp, 192 kb/s
    Metadata:
      encoder         : Lavc58.12
  Stream #0:1: Video: png, rgb24(pc), 1279x1280 [SAR 1:1 DAR 1279:1280], 90k tbr, 90k tbn, 90k tbc (attached pic)
    Metadata:
      title           : thumbnail
      comment         : Cover (front)


  


  How can I keep the album art from the source file ?

  


• Is it possible using FFMPEG to replace one ".ts" file in a HLS ts file collection with another ".ts" file ?

  27 juillet 2019, par Vadim

  There is a video, actually an HLS stream (sequence of TS files)
  I would like to take out one TS chunk and replace it with another.
  Another chunk will be encoded using same FFMPEG encoding settings.

  In case you wonder why i need this :
  There is a five hours HLS stream. One of TS has a wrong title on the video. I need to change that TS without re-encoding the whole HLS stream.

  Currently i tried :

  1. Take TS and convet it using FFMPEG into mp4
  2. Edit mp4 video (change title) and save as new mp4
  3. Convert new mp4 into new TS (using FFMPEG, same settings as was used for original video)
  4. Replace original TS with the new TS.

  But it doesn’t work, player shows loading in progress icon. (in the network console i see that this new TS is loaded normally, with status 200)

  As soon as i replace new TS with original one, player plays it normally.

  Both TS files start with I-frame, both have audio. There’s only a slight difference in the sequence of P and B frames.

  old new
  
  I   I
  
  P   P
  
  B   B
  
  B   B
  
  P   P
  
  B   B
  
  B   B
  
  B   B
  
  P   P
  
  B   B
  
  B   P
  
  B   B
  
  P   B
  
  P   B
  
  B   P

  How can i get new TS chunk working in original TS sequence ?

  Update :

  As per szatmary advice (below) i tried to include "-copyts" flag during all ts>mp4>ts conversions. Also tried "-copytb" flag with all 3 options -1, 0, and 1. However result still the same - player doesn’t play HLS TS sequence (m3u8) with new TS chunk.

  Adding "#EXT-X-DISCONTINUITY" tag after replaced TS in the M3U8 list, doesn’t fix the situation.

  Without "#EXT-X-DISCONTINUITY" tag, player gives error :

  VIDEOJS: ERROR: (CODE:4 MEDIA_ERR_SRC_NOT_SUPPORTED) There appears to be a playback issue.
  
  
  
  code: 4
  
  message: "There appears to be a playback issue."
  
  
  
  __proto__:
  
  MEDIA_ERR_ABORTED: 1
  
  MEDIA_ERR_CUSTOM: 0
  
  MEDIA_ERR_DECODE: 3
  
  MEDIA_ERR_ENCRYPTED: 5
  
  MEDIA_ERR_NETWORK: 2
  
  MEDIA_ERR_SRC_NOT_SUPPORTED: 4
  
  code: 0
  
  message: ""
  
  status: null

  With "#EXT-X-DISCONTINUITY" tag, player gives error :

  VIDEOJS: ERROR: (CODE:3 MEDIA_ERR_DECODE) There appears to be a playback issue.
  
  
  
  code: 3
  
  message: "error"
  
  
  
  __proto__:
  
  MEDIA_ERR_ABORTED: 1
  
  MEDIA_ERR_CUSTOM: 0
  
  MEDIA_ERR_DECODE: 3
  
  MEDIA_ERR_ENCRYPTED: 5
  
  MEDIA_ERR_NETWORK: 2
  
  MEDIA_ERR_SRC_NOT_SUPPORTED: 4
  
  code: 0
  
  message: ""
  
  status: null

  Both TS files (old one and new one) have video and audio streams.

  Looks like something else should be done. I think solution will be similar to ad insertion.