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• Converting .3gp file into mp4 file in android using ffmpeg

  8 août 2013, par user2171513

  I want to convert .3gp file into .mp4 file with resolution modified in Android using ffmpeg.
  I want to increase the resolution of the video from its standard resolution to 1920x1080.

  So far I have been successful in
  1) extracting .h264 video file from .3gp file and increase its resolution
  2) extracting .aac audio file from .3gp file.

  Now I want to combine them back into .mp4 file. The commands that I have used to extract this .h264 and .aac files are :

  ./ffmpeg -i 1.3gp -vbsf h264_mp4toannexb -s 1920x1080 1.h264
  
  ./ffmpeg -i 1.3gp -ab 160k -ac 2 -ar 48000 -vn -strict -2  1.aac

  The command that I have tried to merge them back is

  ./ffmpeg -i 1.h264 -i 1.aac -map 0:0 -map 1:0 -strict -2 1.mp4

  The 1.mp4 that gets generated at the end basically has audio only at few sync frames of video. (Thats what I feel , because the audio is present at specific intervals within the video)

  Can anyone please help in figuring out what am I missing here.

  EDIT :
  So basically I want to concat 4 different videos of 4 different resolution and type.

  1)

  ./ffmpeg -i 1.mp4 
  
  Video: h264 (High), yuv420p, 1920x1080, 16959 kb/s, 29.85 fps, 90k tbr, 90k tbn, 180k tbc
  
  Audio: aac, 48000 Hz, stereo, s16, 106 kb/s

  2)

  ffmpeg -i 2.mp4
  
  Video: h264 (Constrained Baseline), yuv420p, 640x480, 3102 kb/s, 29.99 fps, 90k tbr, 90k tbn, 180k tbc
  
  Audio: aac, 48000 Hz, stereo, s16, 93 kb/s

  3)

  ffmpeg -i 3.3gp
  
  Video: h263, yuv420p, 1408x1152 [PAR 12:11 DAR 4:3], 2920 kb/s, 15 fps, 15 tbr, 15360 tbn, 29.97 tbc
  
  Audio: amrnb, 8000 Hz, 1 channels, flt, 12 kb/s

  4)

  ffmpeg -i 4.3gp
  
  Video: h264 (High), yuv420p, 352x288 [PAR 12:11 DAR 4:3], 216 kb/s, 24 fps, 24 tbr, 24 tbn, 48 tbc
  
  Audio: aac, 44100 Hz, stereo, s16, 92 kb/s

  So I am converting them to mpegts using following commands

  ./ffmpeg -i 1.mp4 -c:v libx264 -vf scale=1920:1080 -r 60 -c:a aac -ar 48000 -b:a 160k -strict experimental -f mpegts 1.ts
  
  ./ffmpeg -i 2.mp4 -c:v libx264 -vf scale=1920:1080 -r 60 -c:a aac -ar 48000 -b:a 160k -strict experimental -f mpegts 2.ts
  
  ./ffmpeg -i 3.3gp -c:v libx264 -vf scale=1920:1080 -r 60 -c:a aac -ar 48000 -b:a 160k -strict experimental -f mpegts 3.ts
  
  ./ffmpeg -i 4.3gp -c:v libx264 -vf scale=1920:1080 -r 60 -c:a aac -ar 48000 -b:a 160k -strict experimental -f mpegts 4.ts

  then concatenating the .ts files into f.ts and then creating a final .mp4 file from it using

   cat 1.ts 2.ts 3.ts 4.ts > f.ts
  
  ./ffmpeg -i f.ts -c copy -bsf:a aac_adtstoasc output.mp4

  But my f.ts also doesnt seem to play correctly in VLC on linux, it plays first 2 mp4's video + audio and it plays last .3gp's audio only.(Same for output.mp4 too) Could you please help me in figuring out what am I missing ?

  Thanks

• How to parse raw file extracted from system/bin/fb0 to .png file in android

  9 octobre 2015, par user2750644

  I know this is question was already asked on stack overflow, but none were helped. Basically i wanted to extract screenshot of another app programatically, for which i managed to get raw formatted image from dev/graphics/fb0 from my rooted device. When i opened this image, it looked as shown below.

  I would be thankful if someone could provide, solution which would convert this raw image into .PNG format.

  

  Above image is screen shot of this.

  

• Recursively Convert FLAC to MP3 Keeping All Metadata and Located in Same Directory

  6 juin 2020, par charlesstricklin

  I've got ffpeg installed on my Windows 10 PC and I'd like to recursively convert .flac music into .mp3 within the same directory (by that I mean the .flac file and the .mpg file end up in the same folder) and I'll be the first to admit I'm just a beginner to both ffmpeg and the CLI, so I'm a newbie there.

  



  I've been looking at Recursively Converting FLAC to MP3 Using FFmpeg While Maintaining Metadata and Directory Structure on Windows as a possible answer to my question, but I do not want to copy from one volume to another.

  



  Just to avoid confusion, my highest directory is C :\Users\User\Downloads\Music\ and I'd like to convert several artist/band's tracks from .flac to .mp3 within the same directory. C :\Users\User\Downloads\Music\1st Artist\1st CD\1st Track.flac would be converted to C :\Users\User\Downloads\Music\1st Artist\1st CD\1st Track.mp3, C :\Users\User\Downloads\Music\2nd Artist\1st CD\1st Track.flac would be converted to C :\Users\User\Downloads\Music\2nd Artist\1st CD\1st Track.mp3 and so on.

  



  Would someone clue me in on the best way you know of to accomplish that from the CLI, please ?