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  • Encode loopback capture data in mp3 using ffmpeg in VC++

    16 octobre 2013, par NetCoder89

    I'm trying to work on loopback capture(What you hear) and record this file in mp3/aac format using VC++. ->I can capture audio and can create a .wav file i.e. not compressed but I want a compressed file so I'm encoding this through ffmpeg to write an mp3 file not a .wav.

    However I'm not getting any way to do it directly? I referred this for loopback capture.

    Please share your experience and opinions.

    Thanks!

  • Need explanation of details of ffmpeg and pipes command

    16 octobre 2013, par Donald A Nummer Jr

    Got the following from FFmpeg FAQ:

    mkfifo intermediate1.mpg
mkfifo intermediate2.mpg
ffmpeg -i input1.avi -sameq -y intermediate1.mpg < /dev/null &
ffmpeg -i input2.avi -sameq -y intermediate2.mpg < /dev/null &
cat intermediate1.mpg intermediate2.mpg |\
ffmpeg -f mpeg -i - -sameq -vcodec mpeg4 -acodec libmp3lame output.avi

    Before i use or modify it I would like to understand it completely.

    What does the < /dev/null & do?

    I understand | is pipe but why |\ ?

    What is the -f mpeg after ffmpeg (Seems, it tells ffmpeg to accept the piped in output from the cat(?) )

  • Linking ffmpeg code in microsoft visual studio

    16 octobre 2013, par JAYANTHI

    I have compiled ffmpeg code on visual studio by linking all .lib files using this http://ffmpeg.zeranoe.com/forum/viewtopic.php?f=5&t=1309 link. while compliling the code i m getting error like fatal error C1083: Cannot open include file: 'X11/Xlib.h': No such file or directory 1> x11grab.c

    I could not find x11 file in ffmpeg source code . please help to solve this error .

  • ffmpeg : Generate video from picture

    16 octobre 2013, par Tchoupi

    I'm currently trying to generate a video from a single picture (1980*1024)
    Here my cmd : 

    ffmpeg -threads 8 -r 1 -loop 1 -i "C:\Library\Titling\__Resources\1.jpg" -t 5.00 -pix_fmt yuv420p -vcodec libx264 -b:v 1500k -s 720:576 -aspect 1.0000 -y "D:\Records\2013-10-11_115453\PublishingDirectory\Temporary_WithtoutAudio1.mp4"

    here cmd execution :

    ffmpeg version N-56297-g7ac6c63 Copyright (c) 2000-2013 the FFmpeg developers
built on Sep 15 2013 18:02:28 with gcc 4.7.3 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libblu
ray --enable-libcaca --enable-libfreetype --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-li
bvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
libavutil 52. 43.100 / 52. 43.100
libavcodec 55. 31.101 / 55. 31.101
libavformat 55. 16.102 / 55. 16.102
libavdevice 55. 3.100 / 55. 3.100
libavfilter 3. 84.100 / 3. 84.100
libswscale 2. 5.100 / 2. 5.100
libswresample 0. 17.103 / 0. 17.103
libpostproc 52. 3.100 / 52. 3.100
Input #0, image2, from 'C:\Library\Titling\__Resources\1.jpg':
Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
Stream #0:0: Video: mjpeg, yuvj420p(pc), 1920x1080 [SAR 96:96 DAR 16:9], 25 fps, 25 tbr, 25 tbn, 25 tbc
[swscaler @ 025bec00] deprecated pixel format used, make sure you did set range correctly
[libx264 @ 025b7ce0] using SAR=4/5
[libx264 @ 025b7ce0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
[libx264 @ 025b7ce0] profile High, level 2.2
[libx264 @ 025b7ce0] 264 - core 135 r2345 f0c1c53 - H.264/MPEG-4 AVC codec - Copyleft 2003-2013 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subm
e=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 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=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=1 scenecut=40 intra_refresh=0 rc_lookahead=40 rc
=abr mbtree=1 bitrate=1500 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'D:\Records\2013-10-11_115453\PublishingDirectory\Temporary_WithtoutAudio1.mp4':
Metadata:
encoder : Lavf55.16.102
Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 720x576 [SAR 4:5 DAR 1:1], q=-1--1, 1500 kb/s, 16384 tbn, 1 tbc
Stream mapping:
Stream #0:0 -> #0:0 (mjpeg -> libx264)
Press [q] to stop, [?] for help
frame= 5 fps=0.0 q=-1.0 Lsize= 64kB time=00:00:03.00 bitrate= 174.0kbits/s
video:63kB audio:0kB subtitle:0 global headers:0kB muxing overhead 1.355758%
[libx264 @ 025b7ce0] frame I:1 Avg QP: 0.00 size: 63203
[libx264 @ 025b7ce0] frame P:1 Avg QP: 0.00 size: 250
[libx264 @ 025b7ce0] frame B:3 Avg QP: 0.00 size: 64
[libx264 @ 025b7ce0] consecutive B-frames: 20.0% 0.0% 0.0% 80.0%
[libx264 @ 025b7ce0] mb I I16..4: 78.8% 4.0% 17.2%
[libx264 @ 025b7ce0] mb P I16..4: 0.0% 0.0% 0.0% P16..4: 1.2% 0.0% 0.1% 0.0% 0.0% skip:98.6%
[libx264 @ 025b7ce0] mb B I16..4: 0.0% 0.0% 0.0% B16..8: 0.9% 0.0% 0.0% direct: 0.0% skip:99.0% L0:12.8% L1:87.2% BI: 0.0%
[libx264 @ 025b7ce0] final ratefactor: -14.43
[libx264 @ 025b7ce0] 8x8 transform intra:4.0% inter:0.0%
[libx264 @ 025b7ce0] coded y,uvDC,uvAC intra: 22.8% 24.1% 24.1% inter: 0.2% 0.0% 0.0%
[libx264 @ 025b7ce0] i16 v,h,dc,p: 93% 1% 4% 2%
[libx264 @ 025b7ce0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 26% 19% 13% 6% 6% 7% 7% 12% 4%
[libx264 @ 025b7ce0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 23% 15% 11% 7% 7% 9% 7% 14% 6%
[libx264 @ 025b7ce0] i8c dc,h,v,p: 85% 4% 6% 5%
[libx264 @ 025b7ce0] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 025b7ce0] kb/s:101.83

    At this step I have two problems :
    first is a warning during execution
    deprecated pixel format used, make sure you did set range correctly
    The second is the video do not work correctly in VLC (video is "black") but it work in wmp...

    Then I add an empty audio track :

    ffmpeg -threads 8 -f lavfi -i aevalsrc=0 -i "D:\Records\2013-10-11_115453\PublishingDirectory\Temporary_WithtoutAudio1.mp4" -vcodec copy -b:v 1500k -acodec aac -map 1:0 -map 0:0 -shortest -strict experimental -y "D:\Records\2013-10-11_115453\PublishingDirectory\Temporary1.mp4"

    After that I concat this video to others using complex filter .
    When I concat my videos I have this message :

    [output stream 0:1 @ 0451d3a0] 100 buffers queued in output stream 0:1, something may be wrong.


    And when i Watch the result my video freeze after the image insertion for a approximatly a seconde .
    perhaps it is not related
    I don't know ...

    Here my concat command and execution log

    D:\test>ffmpeg.exe -threads 8 -i "D:\Records\2013-10-11_115453\PublishingDirectory\Temporary0.mp4" -i "D:\Records\2013-10-11_115453\PublishingDirectory\Temporary1.mp4" -i "D:\Records\2013-10-11_115
453\PublishingDirectory\Temporary2.mp4" -filter_complex "[0:v] [0:a] [1:v] [1:a] [2:v] [2:a] concat=n=3:v=1:a=1 [v] [a] " -map "[v]" -map "[a]" -vcodec libx264 -b 1500000 -s 720:576 -y "D:\Records\
2013-10-11_115453\PublishingDirectory\EditedVideo.mp4"

    ..

    ffmpeg version N-56297-g7ac6c63 Copyright (c) 2000-2013 the FFmpeg developers
built on Sep 15 2013 18:02:28 with gcc 4.7.3 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libblu
ray --enable-libcaca --enable-libfreetype --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-li
bvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
libavutil 52. 43.100 / 52. 43.100
libavcodec 55. 31.101 / 55. 31.101
libavformat 55. 16.102 / 55. 16.102
libavdevice 55. 3.100 / 55. 3.100
libavfilter 3. 84.100 / 3. 84.100
libswscale 2. 5.100 / 2. 5.100
libswresample 0. 17.103 / 0. 17.103
libpostproc 52. 3.100 / 52. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'D:\Records\2013-10-11_115453\PublishingDirectory\Temporary0.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
title : Wildlife in HD
encoder : Lavf54.22.100
comment : Footage: Small World Productions, Inc; Tourism New Zealand | Producer: Gary F. Spradling | Music: Steve Ball
copyright : ┬® 2008 Microsoft Corporation
Duration: 00:00:13.70, start: 0.000000, bitrate: 1914 kb/s
Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 720x576 [SAR 4:5 DAR 1:1], 1778 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
Metadata:
handler_name : SoundHandler
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'D:\Records\2013-10-11_115453\PublishingDirectory\Temporary1.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf55.16.102
Duration: 00:00:05.00, start: 0.023220, bitrate: 106 kb/s
Stream #1:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 720x576 [SAR 4:5 DAR 1:1], 102 kb/s, 1 fps, 1 tbr, 16384 tbn, 2 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #1:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 1 kb/s (default)
Metadata:
handler_name : SoundHandler
Input #2, mov,mp4,m4a,3gp,3g2,mj2, from 'D:\Records\2013-10-11_115453\PublishingDirectory\Temporary2.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
title : Wildlife in HD
encoder : Lavf54.22.100
comment : Footage: Small World Productions, Inc; Tourism New Zealand | Producer: Gary F. Spradling | Music: Steve Ball
copyright : ┬® 2008 Microsoft Corporation
Duration: 00:00:16.47, start: 0.000000, bitrate: 2761 kb/s
Stream #2:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 720x576 [SAR 4:5 DAR 1:1], 2625 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #2:1(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
Metadata:
handler_name : SoundHandler
Please use -b:a or -b:v, -b is ambiguous
[libx264 @ 04c748e0] using SAR=4/5
[libx264 @ 04c748e0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
[libx264 @ 04c748e0] profile High, level 3.1
[libx264 @ 04c748e0] 264 - core 135 r2345 f0c1c53 - H.264/MPEG-4 AVC codec - Copyleft 2003-2013 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subm
e=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 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=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 r
c=abr mbtree=1 bitrate=1500 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'D:\Records\2013-10-11_115453\PublishingDirectory\EditedVideo.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
title : Wildlife in HD
copyright : ┬® 2008 Microsoft Corporation
comment : Footage: Small World Productions, Inc; Tourism New Zealand | Producer: Gary F. Spradling | Music: Steve Ball
encoder : Lavf55.16.102
Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 720x576 [SAR 4:5 DAR 1:1], q=-1--1, 1500 kb/s, 30k tbn, 29.97 tbc
Stream #0:1: Audio: aac (libvo_aacenc) ([64][0][0][0] / 0x0040), 44100 Hz, stereo, s16, 128 kb/s
Stream mapping:
Stream #0:0 (h264) -> concat:in0:v0
Stream #0:1 (aac) -> concat:in0:a0
Stream #1:0 (h264) -> concat:in1:v0
Stream #1:1 (aac) -> concat:in1:a0
Stream #2:0 (h264) -> concat:in2:v0
Stream #2:1 (aac) -> concat:in2:a0
concat:out:v0 -> Stream #0:0 (libx264)
concat:out:a0 -> Stream #0:1 (libvo_aacenc)
Press [q] to stop, [?] for help
[output stream 0:1 @ 0451d3a0] 100 buffers queued in output stream 0:1, something may be wrong.
frame= 1054 fps=101 q=-1.0 Lsize= 7676kB time=00:00:35.23 bitrate=1784.7kbits/s dup=146 drop=0
video:7083kB audio:552kB subtitle:0 global headers:0kB muxing overhead 0.543084%
[libx264 @ 04c748e0] frame I:10 Avg QP:18.41 size: 52713
[libx264 @ 04c748e0] frame P:456 Avg QP:24.04 size: 11772
[libx264 @ 04c748e0] frame B:588 Avg QP:26.20 size: 2308
[libx264 @ 04c748e0] consecutive B-frames: 2.8% 67.9% 1.1% 28.1%
[libx264 @ 04c748e0] mb I I16..4: 23.1% 52.7% 24.2%
[libx264 @ 04c748e0] mb P I16..4: 0.6% 4.3% 1.0% P16..4: 35.8% 18.5% 11.9% 0.0% 0.0% skip:27.8%
[libx264 @ 04c748e0] mb B I16..4: 0.1% 0.8% 0.2% B16..8: 34.2% 5.0% 1.3% direct: 1.3% skip:57.0% L0:37.3% L1:53.3% BI: 9.3%
[libx264 @ 04c748e0] final ratefactor: 23.46
[libx264 @ 04c748e0] 8x8 transform intra:67.7% inter:60.0%
[libx264 @ 04c748e0] coded y,uvDC,uvAC intra: 67.1% 69.5% 30.5% inter: 17.0% 11.0% 0.4%
[libx264 @ 04c748e0] i16 v,h,dc,p: 50% 20% 6% 24%
[libx264 @ 04c748e0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 18% 16% 18% 6% 8% 10% 7% 9% 8%
[libx264 @ 04c748e0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19% 16% 14% 7% 10% 12% 8% 8% 7%
[libx264 @ 04c748e0] i8c dc,h,v,p: 53% 20% 19% 8%
[libx264 @ 04c748e0] Weighted P-Frames: Y:0.4% UV:0.0%
[libx264 @ 04c748e0] ref P L0: 63.9% 19.2% 11.1% 5.7% 0.0%
[libx264 @ 04c748e0] ref B L0: 90.4% 9.0% 0.6%
[libx264 @ 04c748e0] ref B L1: 97.8% 2.2%
[libx264 @ 04c748e0] kb/s:1649.69

    So How can I Fix my "picture" video ?
    Will it fix the freeze problem after concatenation of videos ?
    If not How can I fix it ?

    Thanks in advance !

  • Reg-Video Rotation Metadata

    16 octobre 2013, par user2882101

    If I use:

    ffmpeg -i in.mov -vf "transpose=1" out.mov

    All mov files are getting rotated, but what I need is to automatically detect just the rotated videos and change orientation for just those videos. Please help.

    How can I automatically detect the rotation or orientation of the video during upload and rotate if needed, so that all mov files play in the correct orientation?

    How can I get that metadata of current degree rotation of my video?

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