Newest 'ffmpeg' Questions - Stack Overflow

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  • Convert to webm format with CFR

    6 novembre 2013, par user1910483

    I use the webm format in my program and for normal work I need Constant frame rate(CFR), but all of the programs that I convert the video from .ogv set Variable Frame Rate (VFR). Set -qcomp 0 option to ffmpeg has no effect, although the documentation states that should be set CBR. Encoder vpxenc takes yuv420 format, so it fits poorly. Is there a program that will correctly set the CBR mode?

  • How to use ffmpeg binary in android ?

    6 novembre 2013, par cjose3

    I want make a video from images. I see in some posts (Using FFmpeg with Android-NDK, Create a Video file from images using ffmpeg images-using-ffmpeg) That use command line, is the best choice?? it's possible?

    How are build ffmpeg.so? How I can add to the project?

    This is the command that pretenfi use:

    ffmpeg -r 1 -pattern_type glob -i '*.jpg' out.mp4

    thanks very much. I have 2 weeks search!

    Sorry for my English.

  • correctly escaping text in drawtext filter

    6 novembre 2013, par mente

    According to documentation %{}:, should be escaped with slash. But when I escape % the text is not added. There's error message saying Stray % near ')'. But what does it mean and how I can fix it? Command and output:

    $ /usr/bin/ffmpeg -y -i /home/www/255871.mov -af 'aresample=async=1:min_hard_comp=0.100000' -vf 'scale=480:trunc(ow/a/2)*2,transpose=1 [in];movie=watermarks/text-box440.mov,scale=320:55 [bg];[in][bg] overlay=x=20:y=main_h-80,drawtext=fontsize=20:fix_bounds=1:fontfile=Helvetica\\:Style=bold:fontcolor=0xe6b300:text=small kitten \%\):x=30:y=h-80+ascent/2:draw=gte(t\,0)\;lt(t\,5) [out]' -pix_fmt yuv420p -r 24.39 -map_metadata -1 -movflags +faststart -f mp4 -vcodec libx264 -b:v 800k -maxrate 1100k -bufsize 2M -bt 256k -profile:vbaseline -acodec libfdk_aac -ab 64k -ar 44100 -ac 1 /tmp/kitten.mp4
ffmpeg version 1.2 Copyright (c) 2000-2013 the FFmpeg developers
  built on Mar 15 2013 18:40:14 with gcc 4.4.6 (GCC) 20120305 (Red Hat 4.4.6-4)
  configuration: --enable-gpl --enable-libmp3lame --enable-libvo-aacenc --enable-libx264 --enable-version3 --enable-pthreads --enable-libfaac --enable-nonfree --enable-libfdk_a
ac --enable-fontconfig --enable-libfreetype
  libavutil      52. 18.100 / 52. 18.100
  libavcodec     54. 92.100 / 54. 92.100
  libavformat    54. 63.104 / 54. 63.104
  libavdevice    54.  3.103 / 54.  3.103
  libavfilter     3. 42.103 /  3. 42.103
  libswscale      2.  2.100 /  2.  2.100
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  2.100 / 52.  2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/www/255871.mov':
  Metadata:
    major_brand     : qt
    minor_version   : 0
    compatible_brands: qt
    creation_time   : 2012-07-17 07:42:35
    model           : iPhone 3GS
    model-rus       : iPhone 3GS
    encoder         : 4.2.1
    encoder-rus     : 4.2.1
    date            : 2012-07-17T10:42:35+0300
    date-rus        : 2012-07-17T10:42:35+0300
    make            : Apple
    make-rus        : Apple
  Duration: 00:00:09.38, start: 0.000000, bitrate: 790 kb/s
    Stream #0:0(und): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p, 480x360, 720 kb/s, 29.97 fps, 29.97 tbr, 600 tbn, 1200 tbc
    Metadata:
      rotate          : 90
      creation_time   : 2012-07-17 07:42:35
      handler_name    : Core Media Data Handler
    Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 63 kb/s
    Metadata:
      creation_time   : 2012-07-17 07:42:35
      handler_name    : Core Media Data Handler
[Parsed_drawtext_5 @ 0x2ae9b00] Using "/usr/share/fonts/default/Type1/n019003l.pfb"
[libx264 @ 0x2ae7d40] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
[libx264 @ 0x2ae7d40] profile Constrained Baseline, level 2.1
[libx264 @ 0x2ae7d40] 264 - core 130 r2274 c832fe9 - H.264/MPEG-4 AVC codec - Copyleft 2003-2013 - http://www.videolan.org/x264.html - options: cabac=0 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=24 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=800 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=1100 vbv_bufsize=2000 nal_hrd=none ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to '/tmp/kitten.mp4':
  Metadata:
    encoder         : Lavf54.63.104
    Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 360x480, q=-1--1, 800 kb/s, 19512 tbn, 24.39 tbc
    Stream #0:1: Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, mono, s16, 64 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (h264 -> libx264)
  Stream #0:1 -> #0:1 (aac -> libfdk_aac)
Press [q] to stop, [?] for help
[Parsed_drawtext_5 @ 0x2ae9b00] Stray % near ')'
    Last message repeated 201 times
Stray % near ')'0.0 q=27.0 size=     480kB time=00:00:07.96 bitrate= 493.4kbits/s dup=0 drop=35
[Parsed_drawtext_5 @ 0x2ae9b00] Stray % near ')'
    Last message repeated 77 times
Starting second pass: moving header on top of the file
frame=  231 fps=0.0 q=-1.0 Lsize=    1002kB time=00:00:09.47 bitrate= 866.6kbits/s dup=0 drop=50
video:921kB audio:74kB subtitle:0 global headers:0kB muxing overhead 0.680957%
[libx264 @ 0x2ae7d40] frame I:1     Avg QP:24.43  size: 13264
[libx264 @ 0x2ae7d40] frame P:230   Avg QP:23.72  size:  4041
[libx264 @ 0x2ae7d40] mb I  I16..4: 24.8%  0.0% 75.2%
[libx264 @ 0x2ae7d40] mb P  I16..4:  2.3%  0.0%  4.8%  P16..4: 34.4% 28.8%  9.4%  0.0%  0.0%    skip:20.3%
[libx264 @ 0x2ae7d40] coded y,uvDC,uvAC intra: 62.5% 54.2% 4.4% inter: 19.6% 20.3% 0.1%
[libx264 @ 0x2ae7d40] i16 v,h,dc,p: 36% 29% 19% 16%
[libx264 @ 0x2ae7d40] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19% 21% 20%  6%  8%  7%  7%  6%  6%
[libx264 @ 0x2ae7d40] i8c dc,h,v,p: 65% 15% 17%  3%
[libx264 @ 0x2ae7d40] ref P L0: 93.4%  4.3%  2.3%
[libx264 @ 0x2ae7d40] kb/s:796.32

  • ffmpeg libavcodec.so missing while compile with cygwin

    6 novembre 2013, par nick

    I am building ffmpeg for android by following this tutorial

    now i got android folder inside the ffmpeg2.0.1 folder but there is no libavcodec-55.so file. instead of that i have lib/libavcodec.a

    how can i get libavcodec.so file? build_android.sh

    #!/bin/bash
NDK=$HOME/Desktop/adt/android-ndk-r9
SYSROOT=$NDK/platforms/android-9/arch-arm/
TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/windows-x86_64
function build_one
{
./configure \
--prefix=$PREFIX \
--enable-shared \
--disable-static \
--disable-doc \
--disable-ffmpeg \
--disable-ffplay \
--disable-ffprobe \
--disable-ffserver \
--disable-avdevice \
--disable-doc \
--disable-symver \
--cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
--target-os=linux \
--arch=arm \
--enable-cross-compile \
--sysroot=$SYSROOT \
--extra-cflags="-Os -fpic $ADDI_CFLAGS" \
--extra-ldflags="$ADDI_LDFLAGS" \
$ADDITIONAL_CONFIGURE_FLAG
make clean
make
make install
}
CPU=arm
PREFIX=$(pwd)/android/$CPU 
ADDI_CFLAGS="-marm"
build_one

  • ffmpeg audio conversion distorted - half rate

    6 novembre 2013, par user1688971

    I'm trying to convert an asf audio to mp3 using ffmpeg. But I have one specific audio that gets distorted in the middle and starts like if the person was talking in slow motion (at half rate).

    The command I'm using is:

    ffmpeg - i input.asf -ac 2 output.mp3

    I've tried a lot of options, but about the middle of the audio is when it fails. The raw file sounds good, so it's not the recording. It is af in the middle of the transmission the frame rate went down for some reason.

    Thanks all!

    [EDIT]

    I'm adding the console response after running the command as a suggestion from LordNeckbeard:

    [root@mynasserver home]# ffmpeg -i recording-8532-1.asf -ac 2 -ab 64k -ar 44100 recording-8532-ac2-ar44100.mp3
FFmpeg version 0.6.5, Copyright (c) 2000-2010 the FFmpeg developers
built on Jan 29 2012 23:56:18 with gcc 4.1.2 20080704 (Red Hat 4.1.2-51)
configuration: --prefix=/usr --libdir=/usr/lib --shlibdir=/usr/lib --mandir=/usr/share/man --incdir=/usr/include --disable-avisynth --extra-cflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m32 -march=i386 -mtune=generic -fasynchronous-unwind-tables' --enable-avfilter --enable-avfilter-lavf --enable-libdirac --enable-libfaac --enable-libfaad --enable-libfaadbin --enable-libgsm --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libx264 --enable-gpl --enable-nonfree --enable-postproc --enable-pthreads --enable-shared --enable-swscale --enable-vdpau --enable-version3 --enable-x11grab
libavutil     50.15. 1 / 50.15. 1
libavcodec    52.72. 2 / 52.72. 2
libavformat   52.64. 2 / 52.64. 2
libavdevice   52. 2. 0 / 52. 2. 0
libavfilter    1.19. 0 /  1.19. 0
libswscale     0.11. 0 /  0.11. 0
libpostproc   51. 2. 0 / 51. 2. 0
[flv @ 0x86a4850]max_analyze_duration reached
[flv @ 0x86a4850]Estimating duration from bitrate, this may be inaccurate
Input #0, flv, from 'recording-8532-1.asf':
Metadata:
source          : STW MediaProxy v3.3.7.19894
Duration: 04:00:08.49, start: 0.000000, bitrate: N/A
Stream #0.0: Audio: aac, 44100 Hz, 2 channels (FC), s16
Output #0, mp3, to 'recording-8532-ac2-ar44100.mp3':
Metadata:
TSSE            : Lavf52.64.2
Stream #0.0: Audio: libmp3lame, 44100 Hz, 2 channels, s16, 64 kb/s
Stream mapping:
Stream #0.0 -> #0.0
Press [q] to stop encoding
size=  150906kB time=19315.93 bitrate=  64.0kbits/s    
video:0kB audio:150906kB global headers:0kB muxing overhead 0.000021%

    So from the data above, you can see the input file is about 4hrs. The output ends up being around 5 hrs 20 mins.

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