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• ffmpeg video keep ref frame of source

  9 avril 2021, par user3449922

  I like to keep the some ref frame of source (in this case ref =1) :

  


  Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L3
Format settings                          : CABAC / 1 Ref Frames
Format settings, CABAC                   : Yes
Format settings, Reference frames        : 1 frame
Codec ID                                 : avc1
Codec ID/Info                            : Advanced Video Coding
Duration                                 : 6 min 19 s
Bit rate                                 : 388 kb/s
Width                                    : 640 pixels
Height                                   : 480 pixels
Display aspect ratio                     : 4:3
Frame rate mode                          : Variable
Frame rate                               : 9.479 FPS
Minimum frame rate                       : 3.750 FPS
Maximum frame rate                       : 30.030 FPS
Original frame rate                      : 30.000 FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.133
Stream size                              : 17.5 MiB (74%)
Language                                 : English
Codec configuration box                  : avcC


  


  here the output

  


     ID                                       : 1
    Format                                   : AVC
    Format/Info                              : Advanced Video Codec
    Format profile                           : High@L3
    Format settings                          : CABAC  2 Ref Frames
    Format settings, CABAC                   : Yes
    Format settings, Reference frames        : 2 frames
    Codec ID                                 : avc1
    Codec ID/Info                            : Advanced Video Coding
   


  


  the output Ref Frames are 2 , but I like to keep to 1 or directly force to 1.

  


  There is a way to do it ?

  


  Thanks !

  


• Adobe Air , NativeProcess and ffmpeg

  18 août 2013, par Tom Lecoz

  First of all, please excuse me if my english is not perfect, I hope you could understand me...

  I discover yesterday this video tutorial about Air Native Process and FFMPEG, it shows how to create an Air app that can read every video format (avi, mkv, ...).

  http://www.youtube.com/watch?v=6N7eN9wvAGQ

  I tryed to reproduce it but obviously it didn't work...

  Then I looked for an example of it, with working source code, on the internet. I found this

  http://suzhiyam.wordpress.com/2011/05/05/as3ffmpeg-play-multi-video-formats-in-air/

  The author said it's a document class for a Flash project, it just need a button component, a text area and a video Object.

  I tryed it inside a Flash project, it didn't work...
  So, I made some adjusment to run it outside Flash (I just replaced the DisplayObject on the stage by ActionScript code), just because it easier if you want to test it.

  When I say "it didn't work", I mean my video is not read at all. The nativeProcess is working, my executable is recognize but I always get some ProgressEvent.STANDARD_ERROR_DATA and then the process stop...

  I'm working on Windows 7 64 bit.
  I tryed with FFMPEG 32 & 64 bit and get the exact same (no) result.

  You can find my code here
  pastebin.com/U3xRUKWe

  Can someone help me ?

  Please ! :)

  Thanks by advance !

  Tom

• How to add timecode & Hint Track after concat 2x MP4 to MOV (Quicktime Playback) FFMPEG

  17 février 2019, par Venkatesh R

  What I am trying to achieve :
  After concat 2 files with filter_complex i need to add timecode track and Hint track to the MOV file.

  2x MP4 files >> MOV ( Timecode Track (default:Yes) + Hint Track ( Default:No)

  Issues :

  1. Timecode track is not showing as a tag while playing in QT player like attached screen shot.
  2. If I add Hint Config -movflags rtphintin below command that throws error in quicktime player Error -2002: a bad public movie atom was found in the movie ()

  I have tried below code :

  ffmpeg -ss 00:00:00.000 -t 00:01:00.000 -i Input1.mp4 -ss 00:01:00.001 -t 00:01:00.000 -i Input2.mp4 -filter_complex "[0:v:0] [0:a:0] [1:v:0] [1:a:0] concat=n=2:v=1:a=1[v] [a]" -map "[v]" -c:v libx264 -aspect 4:3 -s 352:288 -coder 1 -profile:v main -level 3.1 -pix_fmt yuv420p -preset ultrafast -video_track_timescale 25 -g 12 -r 25 -bf 2 -refs 1 -x264-params "keyint_min=12:nal-hrd=cbr:b-pyramid=0" -b:v 2000k -minrate 2000k -maxrate 2000k  -map "[a]" -codec:a libfdk_aac -b:a 192k -vbr 4 -ac 2 -async 1 -timecode 09:59:59:10 -f mov 18785_V1.mov

  ---

  > FFMPEG Media Info : ID                                       : 3
  
  Type                                     : Time code
  
  Format                                   : QuickTime TC
  
  Duration                                 : 2 min 0 s
  
  Time code of first frame                 : 09:59:59:10
  
  Time code, striped                       : Yes
  
  Language                                 : English
  
  Default                                  : No

  Comparison Screenshot of Hardware vs FFMPEG Transcoder