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• .h264 file cannot convert to .mp4 file by using ffmpeg

  21 janvier 2023, par Dr.Fail to fall asleep

  I have a car camera. Videos are HEVC codec but stored with .h264 file type.
  
I use ffmpeg to convert these .h264 file type to mp4 file type.

  


  Most of videos are converted successfully, some videos failed.

  


  some video convert successfully, some video failed

  


  What is weird is that this "convert-failed" video clip can be normally played by using the video player provided from video seller.
convert-failed video clip be played successfully

  


  I will upload two of these .h264 videos, one can be converted successfully, one cannot.

  


  Could anyone let me know how to finish the convert.

  


  see my ffmpeg command and output here
https://github.com/Pinocchio2018/h264ConvertedFailVideo.git

  


• How can I know a certain file is a video file ?

  31 mai 2019, par Arthur Park

  I am trying to figure out if a certain user-uploaded file is a video file.

  I first tried ffprobe,

  # a png file
  
  
  
  Input #0, png_pipe, from '<file>':
  
    Duration: N/A, bitrate: N/A
  
      Stream #0:0: Video: png, rgba(pc), 920x2094 [SAR 4724:4724 DAR 460:1047], 25 tbr, 25 tbn, 25 tbc
  
  
  
  # a text file
  
  
  
  Input #0, tty, from '<file>':
  
    Duration: 00:00:00.24, bitrate: 40 kb/s
  
      Stream #0:0: Video: ansi, pal8, 640x400, 25 fps, 25 tbr, 25 tbn, 25 tbc
  
  
  
  # a video file
  
  
  
  Input #0, matroska,webm, from '<file>':
  
    Metadata:
  
      encoder         : libebml v1.3.5 + libmatroska v1.4.8
  
      creation_time   : 2017-12-12T20:18:42.000000Z
  
    <redacted>
  
  </redacted></file></file></file>

  but it’s too hard to figure out what’s what. Even image files and text files count as a video.

  Should I compare the output matroska,webm, with every codec ffmpeg supports or is there a better way to do this ?

• FFmpeg file path exception like file name not found

  7 février 2018, par Sagar Hudge

  I am getting following exception on video trimming.

  video path : /storage/emulated/0/Pictures/Instagram/Fast & Furious 7 - Get Low Extended Version Video.mp4

  file name : Fast & Furious 7 - Get Low Extended Version Video.mp4

  and ffmpeg searching for only Fast in

  /storage/emulated/0/Pictures/Instagram/Fast: No such file or directory

  I have found the issue ,it is causing due to the file name having spaces in between them you can check in above mentioned path and in exception.

  after changing file name its working but changing name of every file from device its not the right way so how can I solve this exception

  FAILED with output : WARNING: linker: /data/user/0/com.example.SeekBarActivity/files/ffmpeg 
  
  has text relocations. This is wasting memory and prevents security hardening.
  
  Please fix. ffmpeg version n2.4.2 Copyright (c) 2000-2014 the FFmpeg developers
  
  
  
  built on Oct  7 2014 15:08:46 with gcc 4.8 (GCC)
  
  configuration: --target-os=linux --cross-prefix=/home/sb/Source-Code/ffmpeg-
  
  android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --
  
  cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/sb/Source-
  
  Code/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 
  
  --enable-libass --enable-libfreetype --enable-libfribidi --enable-fontconfig 
  
  --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --
  
  enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --
  
  enable-yasm --disable-doc --disable-shared --enable-static --pkg-
  
  config=/home/sb/Source-Code/ffmpeg-android/ffmpeg-pkg-config --
  
  prefix=/home/sb/Source-Code/ffmpeg-android/build/armeabi-v7a-neon --extra-
  
  cflags='-I/home/sb/Source-Code/ffmpeg-android/toolchain-android/include -
  
  U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-
  
  all -mfpu=neon' --extra-ldflags='-L/home/sb/Source-Code/ffmpeg-
  
   android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-
  
   lpng -lexpat -lm' --extra-cxxflags=
  
    libavutil      54.  7.100 / 54.  7.100
  
    libavcodec     56.  1.100 / 56.  1.100
  
    libavformat    56.  4.101 / 56.  4.101
  
    libavdevice    56.  0.100 / 56.  0.100
  
    libavfilter     5.  1.100 /  5.  1.100
  
    libswscale      3.  0.100 /  3.  0.100
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  0.100 / 53.  0.100
  
    /storage/emulated/0/Pictures/Instagram/Fast: No such file or directory