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  • FFMPEG android very slow converting raw aac to mp3

    24 novembre 2013, par Feras

    I managed to compile ffmpeg for android from this repo :
    https://github.com/aksalj/ffmpeg-android
    So you can see the configuration options in here :
    https://github.com/aksalj/ffmpeg-android/blob/master/config.sh

    The only changes I did were to change the darwin-x86_54 to darwin-x86 since the new r9b NDK only comes with it and also change the androideabi-4.4.3 to androideabi-4.6 again because of the new NDK. I am encoding a raw ADTS aac to mp3, the decoder for aac is libav and encoder for mp3 is libmp3lame. Even though the process works a simple 5 minute aac files (44100, 2ch) is taking about 3 minutes to process. The same file on my mac (with the macports ffmpeg) takes a few seconds.

    I am not sure but are there any optimizations that can be made to the ffmpeg config script or maybe i need to compile ffmpeg with something like libaacplus(even though i think aacplus is used for encoding only, so shouldnt make a difference).Anyways any performance optimizations will be highly appreciated !

    The android device is a US Galaxy S3 (i747m model which has the Snapdragon S4).

  • ffmpeg minimal requirements configuration for encoding and decoding h264 files

    14 novembre 2013, par TheSquad

    I'm trying to compile ffmpeg with minimal requirements in order to encode/decode with h264.

    So far my command line configuration is :

    ./configure --disable-yasm --disable-everything --enable-encoder=libx264 --enable-encoder=libfaac --enable-decoder=h264 --enable-muxer=h264 --enable-demuxer=h264 --enable-parser=h264 --enable-protocol=file

    once compiled, I try this :

    ./ffmpeg -i ~/Dropbox/TestFile.mov -vcodec libx264 test.mp4

    but I get an error :

      ffmpeg version N-58081-g2925571 Copyright (c) 2000-2013 the FFmpeg developers
    
  built on Nov 14 2013 15:49:58 with Apple LLVM version 5.0 (clang-500.2.76) (based on LLVM 3.3svn)
    
  configuration: --disable-yasm --disable-everything --enable-encoder=libx264 --enable-encoder=libfaac --enable-decoder=h264 --enable-muxer=h264 --enable-demuxer=h264 --enable-parser=h264 --enable-protocol=file
    
  libavutil      52. 52.100 / 52. 52.100
    
  libavcodec     55. 43.100 / 55. 43.100
    
  libavformat    55. 21.100 / 55. 21.100
    
  libavdevice    55.  5.100 / 55.  5.100
    
  libavfilter     3. 91.100 /  3. 91.100
    
  libswscale      2.  5.101 /  2.  5.101
    
  libswresample   0. 17.104 /  0. 17.104
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Users/mGs/Dropbox/TestFile.mov':
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 0
    
    compatible_brands: qt  
    
    creation_time   : 2013-06-23 14:33:09
    
    model           : iPhone 4S
    
    model-fra       : iPhone 4S
    
    encoder         : 6.0
    
    encoder-fra     : 6.0
    
    date            : 2013-06-23T16:33:09+0200
    
    date-fra        : 2013-06-23T16:33:09+0200
    
    make            : Apple
    
    make-fra        : Apple
    
  Duration: 00:00:42.09, start: 0.000000, bitrate: 20960 kb/s
    
    Stream #0:0(und): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080, 20880 kb/s, 29.97 fps, 29.97 tbr, 600 tbn, 1200 tbc (default)
    
    Metadata:
    
      rotate          : 180
    
      creation_time   : 2013-06-23 14:33:09
    
      handler_name    : Core Media Data Handler
    
    Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, 63 kb/s (default)
    
    Metadata:
    
      creation_time   : 2013-06-23 14:33:09
    
      handler_name    : Core Media Data Handler
    
[NULL @ 0x7fd999802e00] Unable to find a suitable output format for 'test.mp4'
    
test.mp4: Invalid argument

    This is probably coming from the fact that I have forgot something to enable on the ffmpeg configuration... But I can't found out what.

    The test file is a video got from iPhone 4S Camera.

  • Changing portrait videos to landscape aspect with latest ffmpeg release is breaking

    19 décembre 2016, par zeal

    I am having an issue scaling videos recorded in portrait with the latest version of ffmpeg (2.1). This worked fine in a previous version, but I need the lastest version to fix a different issue.

    I am trying to take any video passed and make it 852 wide by 480 high. It works fine when converting videos that are wider then tall, but when the video is taller then wide it corrupts the video. It actually adds a letter box to the top and bottom, rather then left and right. Also, the meta data shows it as the correct height & width, but its wrong when played in windows.

    Here are the parameters I am using.

    ffmpeg -i INPUT -s 852x480 -r 30 -aspect 1.775 -b:v 2000000 -vcodec mpeg4 -vf "scale=iw*min(852/iw\,480 /ih):ih*min(852/iw\,480 /ih),pad=852:480 :(852-iw)/2:(480 -ih)/2" -ac 2 -b:a 128k -ar 44100 -y OUTPUT

    Console output from ffmpeg -i INPUT -r 30 -b:v 2000000 -vcodec mpeg4 -vf "scale=852:480" -ac 2 -b:a 128k -ar 44100 -y OUTPUT :

    C:\Lib>ffmpeg -i "d\ca96cd13-2995-4794-b753-22be3b918659.mov" -r 30 -b:v 2000000 -vcodec mpeg4 -vf "
    
scale=852:480" -ac 2 -b:a 128k -ar 44100 -y "d\portx.mp4"
    
ffmpeg version N-58015-g8cdf4e0 Copyright (c) 2000-2013 the FFmpeg developers
    
  built on Nov 10 2013 18:04:45 with gcc 4.8.2 (GCC)
    
  configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --disable-w32thread
    
s --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-icon
    
v --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgsm --enable-
    
libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrw
    
b --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr -
    
-enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --
    
enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libx264 --enab
    
le-libxavs --enable-libxvid --enable-zlib
    
  libavutil      52. 52.100 / 52. 52.100
    
  libavcodec     55. 41.100 / 55. 41.100
    
  libavformat    55. 21.100 / 55. 21.100
    
  libavdevice    55.  5.100 / 55.  5.100
    
  libavfilter     3. 90.102 /  3. 90.102
    
  libswscale      2.  5.101 /  2.  5.101
    
  libswresample   0. 17.104 /  0. 17.104
    
  libpostproc    52.  3.100 / 52.  3.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'd\ca96cd13-2995-4794-b753-22be3b918659.mov':
    
  Metadata:
    
    major_brand     : qt
    
    minor_version   : 0
    
    compatible_brands: qt
    
    creation_time   : 2013-11-12 15:02:21
    
    model           : iPhone 5
    
    model-eng       : iPhone 5
    
    encoder         : 7.0.2
    
    encoder-eng     : 7.0.2
    
    date            : 2013-11-12T10:02:21-0500
    
    date-eng        : 2013-11-12T10:02:21-0500
    
    make            : Apple
    
    make-eng        : Apple
    
  Duration: 00:00:15.48, start: 0.000000, bitrate: 780 kb/s
    
    Stream #0:0(und): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p(tv, smpte170m), 480x360, 7
    
05 kb/s, 29.98 fps, 30 tbr, 600 tbn, 1200 tbc (default)
    
    Metadata:
    
      rotate          : 90
    
      creation_time   : 2013-11-12 15:02:21
    
      handler_name    : Core Media Data Handler
    
    Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 62 kb/s (default)
    
    Metadata:
    
      creation_time   : 2013-11-12 15:02:21
    
      handler_name    : Core Media Data Handler
    
Output #0, mp4, to 'd\portx.mp4':
    
  Metadata:
    
    major_brand     : qt
    
    minor_version   : 0
    
    compatible_brands: qt
    
    make-eng        : Apple
    
    model           : iPhone 5
    
    model-eng       : iPhone 5
    
    make            : Apple
    
    encoder-eng     : 7.0.2
    
    date            : 2013-11-12T10:02:21-0500
    
    date-eng        : 2013-11-12T10:02:21-0500
    
    encoder         : Lavf55.21.100
    
    Stream #0:0(und): Video: mpeg4 ( [0][0][0] / 0x0020), yuv420p, 852x480, q=2-31, 2000 kb/s, 15360
    
 tbn, 30 tbc (default)
    
    Metadata:
    
      rotate          : 90
    
      creation_time   : 2013-11-12 15:02:21
    
      handler_name    : Core Media Data Handler
    
    Stream #0:1(und): Audio: aac (libvo_aacenc) ([64][0][0][0] / 0x0040), 44100 Hz, stereo, s16, 128
    
 kb/s (default)
    
    Metadata:
    
      creation_time   : 2013-11-12 15:02:21
    
      handler_name    : Core Media Data Handler
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (h264 -> mpeg4)
    
  Stream #0:1 -> #0:1 (aac -> libvo_aacenc)
    
Press [q] to stop, [?] for help
    
frame=  465 fps=417 q=3.8 Lsize=    4118kB time=00:00:15.52 bitrate=2173.3kbits/s
    
video:3860kB audio:243kB subtitle:0 global headers:0kB muxing overhead 0.348231%

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