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• Conversion of individual mp4 files to ts yields unexpected playback

  3 août 2021, par MorenoGentili

  I'm converting three mp4 files (h264, no audio, each with a duration of three seconds) to the mpeg-ts format like so.

  


  ffmpeg -i 1.mp4 -c copy 1.ts
ffmpeg -i 2.mp4 -c copy 2.ts
ffmpeg -i 3.mp4 -c copy 3.ts


  


  Please note : I can't combine the mp4 files beforehand. Each one has to be converted individually as shown above since they're being generated by a live recorder.

  


  Then, I manually created a .m3u8 manifest like this one, so I could play those 3 ts files in sequence :

  


  #EXTM3U
#EXT-X-VERSION:3
#EXT-X-MEDIA-SEQUENCE:0
#EXT-X-PLAYLIST-TYPE:VOD
#EXT-X-TARGETDURATION:3
#EXTINF:3,
1.ts
#EXTINF:3,
2.ts
#EXTINF:3,
3.ts
#EXT-X-ENDLIST


  


  When I run the ffplay index.m3u8 command :

  


  

  • 1.ts is played for three seconds as expected ;

  


  • 2.ts is played "for a split second" (maybe just a frame) ;

  


  • 3.ts is played for three seconds as expected.

  


  


  Can someone explain why 2.ts is shown for such a brief time ? When I run ffmpeg -i 2.ts, the output is correctly displaying a duration of three seconds.

  


  Input #0, mpegts, from '2.ts':
  Duration: 00:00:03.00, start: 1.480000, bitrate: 49 kb/s


  


  How can I change my mp4 -> ts conversion commands so that each file can play for their whole duration (i.e. three seconds each) ? I'd like to avoid reencoding if possible.

  


  Thank you, I'm adding a link to the three files and the manifest for completeness.

  


• Adding Mediainfo into Videos

  13 août 2019, par yrcje

  I’m trying to add/preserve these datas while recording/editing .TS footage, (datas will be shown below), I’m using VideoReDo TVSuite5 to edit these .ts/.tp files without losing these datas, as from what I know, VideoReDo software automatically removes these miscellaneous data from the stream, I’m trying to preserve it while editing, or adding it back after editing, is there any way to do this ?

  Not much as I can’t really find any documentation on Menu info editing online. From what I can see so far, these data can only be obtained if the source itself is from a Native Internet TV Box. But is there any other way around it ?

  Menu #1
  
  ID                                       : 32 (0x20)
  
  Menu ID                                  : 2 (0x2)
  
  Duration                                 : 1 h 25 min
  
  List                                     : 33 (0x21) (MPEG Video, Korean) / 36 (0x24) (AC-3, Korean)

  The Mediainfo is inside the pastebin link.
  Mediainfo

  No error message defined a there is no known way to add these.

• FFMPEG commands in JavaScript

  21 juillet 2022, par Vladyslav Semeniuk

  Is it possible to use command like : ffmpeg -i video_1920.mp4 -vf scale=640:360 video_640.mp4 -hide_banner to reduce the resolution of a video in the pure JavaScript. For example I got a dropdown menu in which I have < a > tag, so I want to do a video quality selection by clicking on that menu hyperlink with JS. How to implement that properly, please help.

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