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• Mencoder error - merging two video files with same fps, resolution and codec failed

  26 mai 2020, par Estatistics

  Mencoder error in linux - merging two video files with same fps, resolution and video and audio codec failed.

  



  These video files had different fps ratios, video codecs, and Audio codecs but same resolution. I made them to have the same codec by using the below ffmpeg command line per video :

  



  ffmpeg -i D1_vid.mp4 -c:v libx264 -refs 3 -x264-params b-pyramid=2   -acodec aac -b:a 327680  D1_video.mp4


  



  However, even i made them to have many other aspects the same ones (e.g. ref frames) according to MediaInfo, they failed to merged under Mencoder :

  



  ` mencoder -oac pcm -ovc copy -o video_out.avi D1_video.mp4 D2_video.mp4


  



  It is the different overall bit rate ? How I fix that maintaining all other aspects that are presented by MediaInfo in Linux equal ?

  



  

  



  output by Mencoder

  



  MEncoder 1.3.0 (Debian), built with gcc-7 (C) 2000-2016 MPlayer Team
success: format: 0  data: 0x0 - 0x2be37eba
libavformat version 57.83.100 (external)
libavformat file format detected.
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f70ecf872a0]Protocol name not provided, cannot determine if input is local or a network protocol, buffers and access patterns cannot be configured optimally without knowing the protocol
[lavf] stream 0: video (h264), -vid 0
[lavf] stream 1: audio (aac), -aid 0, -alang und
VIDEO:  [H264]  1280x720  24bpp  29.583 fps  4278.2 kbps (522.2 kbyte/s)
[V] filefmt:44  fourcc:0x34363248  size:1280x720  fps:29.583  ftime:=0.0338
==========================================================================
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
libavcodec version 57.107.100 (external)
AUDIO: 48000 Hz, 1 ch, floatle, 239.1 kbit/15.57% (ratio: 29890->192000)
Selected audio codec: [ffaac] afm: ffmpeg (FFmpeg AAC (MPEG-2/MPEG-4 Audio))
==========================================================================
videocodec: framecopy (1280x720 24bpp fourcc=34363248)
Writing header...
ODML: Aspect information not (yet?) available or unspecified, not writing vprp header.
Writing header...
ODML: Aspect information not (yet?) available or unspecified, not writing vprp header.
Pos:1301.6s  38506f (99%) 1492.89fps Trem:   0min 784mb  A-V:0.020 [4278:767]
success: format: 0  data: 0x0 - 0x208dfde4
libavformat file format detected.
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f70ecf872a0]Protocol name not provided, cannot determine if input is local or a network protocol, buffers and access patterns cannot be configured optimally without knowing the protocol
[lavf] stream 0: video (h264), -vid 0
[lavf] stream 1: audio (aac), -aid 0, -alang eng
VIDEO:  [H264]  1280x720  24bpp  29.583 fps  3085.4 kbps (376.6 kbyte/s)
[V] filefmt:44  fourcc:0x34363248  size:1280x720  fps:29.583  ftime:=0.0338
==========================================================================
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
AUDIO: 48000 Hz, 1 ch, floatle, 220.0 kbit/14.32% (ratio: 27498->192000)
Selected audio codec: [ffaac] afm: ffmpeg (FFmpeg AAC (MPEG-2/MPEG-4 Audio))
==========================================================================
videocodec: framecopy (1280x720 24bpp fourcc=34363248)
videocodec: framecopy (1280x720 24bpp fourcc=34363248)

All video files must have identical fps, resolution, and codec for -ovc copy.


  


• Video Resolution 1920 x 1080

  29 mai 2020, par Satish Kumar

  Attached the image here I have video of Resolution 1920X1080 (16:9 aspect ratio), when played its cropped with black box all sides. how to remove the blaxk boxes to get the 1920x1080 video.

  



  pl help in on FFmpeg syntax.

  



  Below the audio and video details

  



  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Maths Logic.mp4' :
 Metadata :
 major_brand : isom
 minor_version : 512
 compatible_brands : isomiso2avc1mp41
 encoder : Lavf58.19.102
 Duration : 00:43:11.24, start : 0.000000, bitrate : 1475 kb/s
 Stream #0:0(und) : Video : h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 1405 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc (default)
 Metadata :
 handler_name : VideoHandler
 Stream #0:1(und) : Audio : aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 64 kb/s (default)
 Metadata :
 handler_name : SoundHandler

  


• Doc : Tech Resolution Process

  10 mars 2021, par Jean-Baptiste Kempf

  Doc : Tech Resolution Process
  

  • [DH] doc/dev_community/community.md
  • [DH] doc/dev_community/resolution_process.md