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• Encoding real, source duration of a timelapse into MP4 container using FFMPEG (GoPro) [closed]

  13 août 2024, par Marek Towarek

  Footage recorded with GoPro TimeLapse / TimeWarp, indicates the total, real-time duration of recorded data, while the video stream is of reduced length by the timelapse interval.

  


  General
Complete name               : E:\Video\GoPro\GoPro\GH010656.MP4
Format                      : MPEG-4
Format profile              : Base Media / Version 1
Codec ID                    : mp41 (mp41)
File size                   : 1.94 GiB
Duration                    : 22 min 55 s
Overall bit rate mode       : Variable
Overall bit rate            : 12.1 Mb/s

Video
ID                          : 1
Format                      : AVC
Format/Info                 : Advanced Video Codec
Format profile              : High@L5
Format settings             : CABAC / 2 Ref Frames
Format settings, CABAC      : Yes
Format settings, Reference  : 2 frames
Format settings, GOP        : M=1, N=15
Codec ID                    : avc1
Codec ID/Info               : Advanced Video Coding
Duration                    : 4 min 35 s
Bit rate mode               : Variable
Bit rate                    : 60.0 Mb/s
Width                       : 1 920 pixels
Height                      : 1 440 pixels
Display aspect ratio        : 4:3
Rotation                    : 180°
Frame rate mode             : Constant
Frame rate                  : 29.970 (30000/1001) FPS
Color space                 : YUV
Chroma subsampling          : 4:2:0
Bit depth                   : 8 bits
Scan type                   : Progressive
Bits/(Pixel*Frame)          : 0.724
Stream size                 : 1.92 GiB (99%)
Title                       : GoPro AVC  
Language                    : English
Color range                 : Limited
colour_range_Original       : Full
Color primaries             : BT.709
Transfer characteristics    : BT.709
Matrix coefficients         : BT.709
Codec configuration box     : avcC

Other #1
ID                          : 2
Type                        : Time code
Format                      : QuickTime TC
Duration                    : 4 min 35 s
Bit rate mode               : Constant
Frame rate                  : 29.970 (30000/1001) FPS
Title                       : GoPro TCD  
Language                    : English

Other #2
Type                        : meta
Duration                    : 22 min 55 s
Source duration             : 4 min 35 s
Bit rate mode               : Variable
Stream size                 : 15.0 MiB
Source stream size          : 15.0 MiB


  


  This information could be omitted.
  
But it becomes quite important for correctness of GPS Data stored in Stream #2.

  


  Unfortunately, all the settings I have tried for FFMPEG, do not preserve the duration of Stream #2.
& the output ends up looking like this :

  


  General
Complete name               : C:\Video_Encode\GoPro\GH010656.mp4
Format                      : MPEG-4
Format profile              : Base Media
Codec ID                    : isom (isom/iso2/mp41)
File size                   : 717 MiB
Duration                    : 4 min 35 s
Overall bit rate            : 21.9 Mb/s
Encoded date                : UTC 2026-03-29 11:28:23
Tagged date                 : UTC 2026-03-29 11:28:23
Writing application         : Lavf61.5.101

Video
ID                          : 1
Format                      : HEVC
Format/Info                 : High Efficiency Video Coding
Format profile              : Main@L5@Main
Codec ID                    : hvc1
Codec ID/Info               : High Efficiency Video Coding
Duration                    : 4 min 35 s
Bit rate                    : 21.4 Mb/s
Width                       : 1 920 pixels
Height                      : 1 440 pixels
Display aspect ratio        : 4:3
Frame rate mode             : Constant
Frame rate                  : 29.970 (30000/1001) FPS
Color space                 : YUV
Chroma subsampling          : 4:2:0 (Type 0)
Bit depth                   : 8 bits
Scan type                   : Progressive
Bits/(Pixel*Frame)          : 0.258
Stream size                 : 702 MiB (98%)
Title                       : GoPro AVC  
Writing library             : x265 3.6+35-dd594f59d:[Windows][GCC 14.1.0][64 bit] 8bit+10bit+12bit
Language                    : English
Encoded date                : UTC 2026-03-29 11:28:23
Tagged date                 : UTC 2026-03-29 11:28:23
Color range                 : Full
Color primaries             : BT.709
Transfer characteristics    : BT.709
Matrix coefficients         : BT.709
Codec configuration box     : hvcC

Other #1
ID                          : 2
Type                        : Time code
Format                      : QuickTime TC
Duration                    : 4 min 35 s
Frame rate                  : 29.970 (30000/1001) FPS
Time code of first frame    : 17:55:35:02
Time code of last frame     : 18:00:09:28
Time code, stripped         : Yes
Title                       : GoPro TCD  
Language                    : English
Default                     : Yes
Alternate group             : 2
Encoded date                : UTC 2026-03-29 11:28:23
Tagged date                 : UTC 2026-03-29 11:28:23
mdhd_Duration               : 275175

Other #2
Type                        : meta
Duration                    : 4 min 35 s
Bit rate mode               : Variable


  


  Any ideas how to preserve that real time duration indicator ?
  
Here is the FFMPEG binary I use to get the TMCD & GMPD data to copy : GitHub Link

  


• ffmpeg 1 image (JPG) + 1 audio file (MP3) = 1 video (WEBM) using real encode (-re)

  27 janvier 2015, par Gabriel Viana Passos

  I’d like to make video streaming to distribute it in a streaming.
  The mp3 file is being extracted from a video file (which is being recorded live) and, while audio being extracted (MP3), I want to take this audio file and a image it and spread it in a real time streaming. But -re is not working for this.

  To extract audio file i use :

  ffmpeg.exe -re -i file(LIVE).AVI -vn -ar 22050 -ab 16k -r 1 -ac 1 -f mp3 C:\Users\" & wshNetwork.Username & "\Documents\audio.mp3"

  This work very well to make the MP3 file. Using -re.

  After that, I’m using this command to marge the auvio file with the jpg image :

  ffmpeg.exe -loop 1 -f image2 -i c:\picture.jpg -re -i c:\Users\" & wshNetwork.Username & "\Documents\audio.mp3 -vb 10k -ar 22050 -ab 16k -ac 1 -r 1 -bufsize 300k -f webm www.adress.com

  This second command is not working because the -re is not working, and produce a video with the picture and a choppy audio.

  the output is :

  ffmpeg version N-63113-g72dcd48 Copyright (c) 2000-2014 the FFmpeg developers
  
    built on May 12 2014 22:10:08 with gcc 4.8.2 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
  
  isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
  
  le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
  
  e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
  
  ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
  
  ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
  
  eex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aa
  
  cenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavp
  
  ack --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable
  
  -decklink --enable-zlib
  
    libavutil      52. 83.100 / 52. 83.100
  
    libavcodec     55. 61.100 / 55. 61.100
  
    libavformat    55. 37.102 / 55. 37.102
  
    libavdevice    55. 13.101 / 55. 13.101
  
    libavfilter     4.  5.100 /  4.  5.100
  
    libswscale      2.  6.100 /  2.  6.100
  
    libswresample   0. 18.100 /  0. 18.100
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Input #0, image2, from 'c:\imagens\radiobb.jpg':
  
    Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: mjpeg, yuvj420p(pc), 553x342 [SAR 96:96 DAR 553:342], 25
  
   fps, 25 tbr, 25 tbn, 25 tbc
  
  [mp3 @ 0000000002b8f660] Estimating duration from bitrate, this may be inaccurat
  
  e
  
  Input #1, mp3, from 'C:\Users\f3548956\Documents\audio.mp3':
  
    Metadata:
  
      encoder         : Lavf55.37.102
  
    Duration: 00:00:09.34, start: 0.050113, bitrate: 16 kb/s
  
      Stream #1:0: Audio: mp3, 22050 Hz, mono, s16p, 16 kb/s
  
  [swscaler @ 0000000002ae1640] deprecated pixel format used, make sure you did se
  
  t range correctly
  
  [libvpx @ 0000000002a8da40] v1.3.0
  
  Output #0, webm, to 'http://172.17.146.***:8080/publish/tvbb100?password=****'
  
  :
  
    Metadata:
  
      encoder         : Lavf55.37.102
  
      Stream #0:0: Video: vp8 (libvpx), yuv420p, 553x342 [SAR 1:1 DAR 553:342], q=
  
  -1--1, 10 kb/s, 1k tbn, 25 tbc
  
      Stream #0:1: Audio: vorbis (libvorbis), 22050 Hz, mono, fltp, 16 kb/s
  
  Stream mapping:
  
      Stream #0:0 -> #0:0 (mjpeg -> libvpx)
  
      Stream #1:0 -> #0:1 (mp3 -> libvorbis)
  
      Press [q] to stop, [?] for help
  
      frame=   33 fps=0.0 q=0.0 size=     4kB time=00:00:01.32 bitrate=  23.3kbits/s
  
      frame=   67 fps= 66 q=0.0 size=     4kB time=00:00:02.68 bitrate=  11.5kbits/s
  
      frame=  101 fps= 66 q=0.0 size=    11kB time=00:00:04.04 bitrate=  22.4kbits/s
  
      frame=  133 fps= 66 q=0.0 size=    11kB time=00:00:05.32 bitrate=  17.0kbits/s

  Can anybody help me ?

• How to achieve real time video editing on Android ?

  3 octobre 2024, par Itamar

  I've been working recently on a video-editing-related project on Android, and am desperately looking for resources related to video editing on the platform.

  


  The only video-editing related "method" or information I could find was using the FFmpeg library, which is pretty rich in features and capabilities but works really slow, operations such as reversing a 10-second video can take as long as 30 seconds, which delivers a really poor user experience.

  


  That being said, it seems that there are tons of Android video-editing apps that are capable of doing everything FFmpeg can, only in almost immediate periods of time (apps such as InShot, PocketVideo or even the previous musical.ly TikTok).

  


  I've tried researching and searching for information on the topic in almost any reasonable place (Google, GitHub, YouTube, the Android developer center, and even on "support" pages of the above-mentioned apps) to no avail (no explanatory documents, no open source libraries, not even demo apps), if anyone could shed some light on the subject that would be much, much appreciated !

  


  Thanks.