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  • FFMPEG x264 MP4 Encoding all grey

    7 mars 2013, par Brianjs

    I am currently using FFMPEG v1.1 on CentOS 6.3.

    I configured FFMPEG with :

    ./configure --arch=x86_64  --enable-libmp3lame  --enable-librtmp  --enable-libtheora --enable-libvorbis  --enable-libx264 --enable-pthreads --enable-gpl --enable-runtime-cpudetect

    when I run a simple command to record live input to MP4 by :

    ffmpeg -f video4linux2 -s 640x480 -i /dev/video0 /home/irdb/Desktop/test.mp4

    I get nothing, just a grey screen with some artifacts around the edges. However when I run the same command as .MPG it comes out fine. I need it in MP4 format however.

    On a side note I am running x264-0.120 installed through yum

    My question is, is there a problem with the way I compiled ffmpeg ? Or is it possibly something else ?

    edit :

    Output from example as requested :

    # ffmpeg -f video4linux2 -s 640x480 -t 5 -i /dev/video0 -strict 2 /home/irdb/Desktop/test.mp4
    
ffmpeg version N-50546-g1f5b5b8 Copyright (c) 2000-2013 the FFmpeg developers
    
built on Mar  7 2013 00:17:44 with gcc 4.4.6 (GCC) 20120305 (Red Hat 4.4.6-4)
    
configuration: --enable-libmp3lame --enable-librtmp --enable-libtheora --enable-   libvorbis --enable-libx264 --enable-pthreads --enable-gpl --enable-runtime-cpudetect
    
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
    
[video4linux2,v4l2 @ 0x3025120] Estimating duration from bitrate, this may be   inaccurate
    
Input #0, video4linux2,v4l2, from '/dev/video0':
    
Duration: N/A, start: 128.640356, bitrate: 147456 kb/s
    
Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 640x480, 147456 kb/s, 30 fps, 30 tbr, 1000k tbn, 1000k tbc
    
[libx264 @ 0x3026f80] using cpu capabilities: MMX2 SSE2Fast SSEMisalign LZCNT
    
[libx264 @ 0x3026f80] profile High 4:2:2, level 3.0, 4:2:2 8-bit
    
[libx264 @ 0x3026f80] 264 - core 130 r2274 c832fe9 - 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 subme=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=6 lookahead_threads=1 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 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    
Output #0, mp4, to '/home/irdb/Desktop/test.mp4':
    
Metadata:
    
encoder         : Lavf54.63.104
    
Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv422p, 640x480, q=-1--1, 15360 tbn, 30 tbc
    
Stream mapping:
    
Stream #0:0 -> #0:0 (rawvideo -> libx264)
    
Press [q] to stop, [?] for help
    
frame=   32 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=21    drframe=   46 fps= 46 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=28 drframe=    62 fps= 41 q=29.0 size=      71kB time=00:00:00.33 bitrate=1735.2kbits/frame=   76 fps=  38 q=29.0 size=     169kB time=00:00:00.80 bitrate=1731.2kbits/frame=   93 fps= 37  q=29.0 size=     311kB time=00:00:01.36 bitrate=1862.3kbits/frame=  107 fps= 35 q=29.0  size=     423kB time=00:00:01.83 bitrate=1891.0kbits/frame=  123 fps= 35 q=29.0 size=      537kB time=00:00:02.36 bitrate=1860.2kbits/frame=  139 fps= 34 q=29.0 size=     664kB  time=00:00:02.90 bitrate=1876.0kbits/frame=  150 fps= 29 q=-1.0 Lsize=    1174kB  time=00:00:04.93 bitrate=1948.7kbits/s dup=81 drop=0    
    
video:1172kB audio:0kB subtitle:0 global headers:0kB muxing overhead 0.133409%
    
[libx264 @ 0x3026f80] frame I:2     Avg QP:23.22  size: 28460
    
[libx264 @ 0x3026f80] frame P:136   Avg QP:24.45  size:  8397
    
[libx264 @ 0x3026f80] frame B:12    Avg QP:26.18  size:    42
    
[libx264 @ 0x3026f80] consecutive B-frames: 88.0%  4.0%  0.0%  8.0%
    
[libx264 @ 0x3026f80] mb I  I16..4: 47.1% 28.8% 24.1%
    
[libx264 @ 0x3026f80] mb P  I16..4:  4.3%  1.9%  1.2%  P16..4: 29.0% 11.4%  9.2%      0.0%  0.0%    skip:43.0%
    
[libx264 @ 0x3026f80] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  1.5%  0.0%  0.0%   direct: 0.0%  skip:98.5%  L0:16.5% L1:83.5% BI: 0.0%
    
[libx264 @ 0x3026f80] 8x8 transform intra:26.4% inter:30.7%
    
[libx264 @ 0x3026f80] coded y,uvDC,uvAC intra: 85.2% 95.6% 83.5% inter: 10.9% 38.6% 24.0%
    
[libx264 @ 0x3026f80] i16 v,h,dc,p: 33% 19% 40%  8%
    
[libx264 @ 0x3026f80] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu:  6% 12% 55%  5%  3%  4%  4%  3%  8%
    
[libx264 @ 0x3026f80] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 15%  9% 63%  3%  2%  2%  2%  2%  2%
    
[libx264 @ 0x3026f80] i8c dc,h,v,p: 66% 11% 14%  9%
    
[libx264 @ 0x3026f80] Weighted P-Frames: Y:0.0% UV:0.0%
    
[libx264 @ 0x3026f80] ref P L0: 56.6%  7.5%  8.1% 27.8%
    
[libx264 @ 0x3026f80] ref B L0: 83.3% 16.7%
    
[libx264 @ 0x3026f80] ref B L1: 90.7%  9.3%
    
[libx264 @ 0x3026f80] kb/s:1918.95

  • flvEncoder .flv output won't convert to .mp4 with ffmpeg

    31 juillet 2013, par Emma Assin

    My current project involves creating a .flv using AIR (using https://github.com/zeropointnine/leelib/tree/master/src/leelib/util/flvEncoder) - which then has to be converted into an .mp4, for which we are using ffmpeg.

    The .mp4 output is the correct dimensions and duration, but blank (no images). Audio is not an issue as the original output has no audio.

    ffmpeg version N-55020-g768e40b Copyright (c) 2000-2013 the FFmpeg developers
    
  built on Jul 28 2013 18:05:44 with gcc 4.7.3 (GCC)
    
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --e
    
nable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable
    
-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enab
    
le-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheo
    
ra --enable-libtwolame --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --en
    
able-libxavs --enable-libxvid --enable-zlib
    
  libavutil      52. 40.100 / 52. 40.100
    
  libavcodec     55. 19.100 / 55. 19.100
    
  libavformat    55. 12.102 / 55. 12.102
    
  libavdevice    55.  3.100 / 55.  3.100
    
  libavfilter     3. 81.103 /  3. 81.103
    
  libswscale      2.  4.100 /  2.  4.100
    
  libswresample   0. 17.103 /  0. 17.103
    
  libpostproc    52.  3.100 / 52.  3.100
    
Input #0, flv, from 'testWithAudio.flv':
    
  Metadata:
    
    canSeekToEnd    : true
    
    metadatacreator : FlvEncoder v0.9 Lee Felarca
    
  Duration: 00:00:44.77, start: 0.000000, bitrate: 56730 kb/s
    
    Stream #0:0: Video: flashsv, bgr24, 400x400, 30 tbr, 1k tbn, 1k tbc
    
    Stream #0:1: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s
    
No pixel format specified, yuv444p for H.264 encoding chosen.
    
Use -pix_fmt yuv420p for compatibility with outdated media players.
    
[libx264 @ 00000000002e1da0] using cpu capabilities: MMX2 SSE2Fast SSEMisalign LZCNT
    
[libx264 @ 00000000002e1da0] profile High 4:4:4 Predictive, level 2.1, 4:4:4 8-bit
    
[libx264 @ 00000000002e1da0] 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 subme=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=4 threads=1 lookahead_threads=1 sl
    
iced_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 dire
    
ct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=
    
23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    
Output #0, mp4, to 'testWithAudio.mp4':
    
  Metadata:
    
    canSeekToEnd    : true
    
    metadatacreator : FlvEncoder v0.9 Lee Felarca
    
    encoder         : Lavf55.12.102
    
    Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv444p, 400x400, q=-1--1, 15360 tbn, 30 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 -> #0:0 (flashsv -> libx264)
    
  Stream #0:1 -> #0:1 (pcm_s16le -> libvo_aacenc)
    
Press [q] to stop, [?] for help
    
frame= 1343 fps= 25 q=29.0 Lsize=    2680kB time=00:00:44.70 bitrate= 491.2kbits/s
    
video:1943kB audio:691kB subtitle:0 global headers:0kB muxing overhead 1.756713%
    
[libx264 @ 00000000002e1da0] frame I:25    Avg QP:20.44  size: 14523
    
[libx264 @ 00000000002e1da0] frame P:614   Avg QP:23.20  size:  2319
    
[libx264 @ 00000000002e1da0] frame B:704   Avg QP:24.59  size:   287
    
[libx264 @ 00000000002e1da0] consecutive B-frames: 25.6% 11.0%  7.4% 56.0%
    
[libx264 @ 00000000002e1da0] mb I  I16..4: 17.6% 67.0% 15.3%
    
[libx264 @ 00000000002e1da0] mb P  I16..4:  7.6%  9.9%  0.8%  P16..4: 28.0%  8.3%  4.0%  0.0%  0.0%    skip:41.4%
    
[libx264 @ 00000000002e1da0] mb B  I16..4:  0.4%  0.5%  0.0%  B16..8: 16.3%  1.1%  0.1%  direct: 0.2%  skip:81.4%  L0:39.7% L
    
1:57.4% BI: 2.8%
    
[libx264 @ 00000000002e1da0] 8x8 transform intra:56.3% inter:85.5%
    
[libx264 @ 00000000002e1da0] coded y,u,v intra: 35.7% 17.0% 19.1% inter: 7.7% 3.8% 3.4%
    
[libx264 @ 00000000002e1da0] i16 v,h,dc,p: 26% 28% 17% 30%
    
[libx264 @ 00000000002e1da0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 21% 21% 33%  4%  4%  5%  4%  4%  4%
    
[libx264 @ 00000000002e1da0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 25% 21% 16%  5%  6%  9%  6%  6%  6%
    
[libx264 @ 00000000002e1da0] Weighted P-Frames: Y:6.5% UV:3.3%
    
[libx264 @ 00000000002e1da0] ref P L0: 56.8% 16.5% 18.2%  8.0%  0.6%
    
[libx264 @ 00000000002e1da0] ref B L0: 82.3% 14.1%  3.7%
    
[libx264 @ 00000000002e1da0] ref B L1: 93.7%  6.3%
    
[libx264 @ 00000000002e1da0] kb/s:355.47

    Any ideas ?

  • ffmpeg concat last image duration incorrect

    27 novembre 2019, par SIDU

    Here is my png.txt file :

    file '01.png'
    
duration 92
    
file '02.png'
    
duration 46
    
file '03.png'
    
duration 67
    
file '04.png'
    
duration 62
    
file '05.png'
    
duration 57
    
file '06.png'
    
duration 3
    
file '06.png'

    mp3 duration = 00:05:28 (total of above)

    And here is the line :

    ffmpeg -f concat -i png.txt -vsync vfr -i 20170817.mp3 -c:a aac -s 1280x720 -c:v libx264 -pix_fmt yuv420p -shortest 20170817.mp4

    And here is the output :

    ffmpeg version 3.3.2 Copyright (c) 2000-2017 the FFmpeg developers
    
  built with Apple LLVM version 8.1.0 (clang-802.0.42)
    
  configuration: --prefix=/usr/local/Cellar/ffmpeg/3.3.2 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-opencl --disable-lzma --enable-vda
    
  libavutil      55. 58.100 / 55. 58.100
    
  libavcodec     57. 89.100 / 57. 89.100
    
  libavformat    57. 71.100 / 57. 71.100
    
  libavdevice    57.  6.100 / 57.  6.100
    
  libavfilter     6. 82.100 /  6. 82.100
    
  libavresample   3.  5.  0 /  3.  5.  0
    
  libswscale      4.  6.100 /  4.  6.100
    
  libswresample   2.  7.100 /  2.  7.100
    
  libpostproc    54.  5.100 / 54.  5.100
    
Input #0, concat, from 'png.txt':
    
  Duration: 00:05:27.00, start: 0.000000, bitrate: 0 kb/s
    
    Stream #0:0: Video: png, rgba(pc), 1280x720 [SAR 2835:2835 DAR 16:9], 25 tbr, 25 tbn, 25 tbc
    
Input #1, mp3, from '20170817.mp3':
    
  Metadata:
    
    encoder         : Lavf57.71.100
    
  Duration: 00:05:28.10, start: 0.069063, bitrate: 24 kb/s
    
    Stream #1:0: Audio: mp3, 16000 Hz, mono, s16p, 24 kb/s
    
File '20170817.mp4' already exists. Overwrite ? [y/N] y
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (png (native) -> h264 (libx264))
    
  Stream #1:0 -> #0:1 (mp3 (native) -> aac (native))
    
Press [q] to stop, [?] for help
    
[libx264 @ 0x7fbe83003000] using SAR=1/1
    
[libx264 @ 0x7fbe83003000] using cpu capabilities: MMX2 SSE2Fast SSSE3     SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
    
[libx264 @ 0x7fbe83003000] profile High, level 3.1
    
[libx264 @ 0x7fbe83003000] 264 - core 148 r2748 97eaef2 - H.264/MPEG-4    AVC codec - Copyleft 2003-2016 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=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=6 lookahead_threads=1 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 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    
Output #0, mp4, to '20170817.mp4':
    
  Metadata:
    
    encoder         : Lavf57.71.100
    
    Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps, 12800 tbn, 25 tbc
    
    Metadata:
    
      encoder         : Lavc57.89.100 libx264
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    
    Stream #0:1: Audio: aac (LC) ([64][0][0][0] / 0x0040), 16000 Hz, mono, fltp, 69 kb/s
    
    Metadata:
    
      encoder         : Lavc57.89.100 aac
    
frame=    7 fps=4.2 q=-1.0 Lsize=    3349kB time=00:05:27.04 bitrate=  83.9kbits/s speed= 196x    
    
video:465kB audio:2863kB subtitle:0kB other streams:0kB global    headers:0kB muxing overhead: 0.644585%
    
[libx264 @ 0x7fbe83003000] frame I:1     Avg QP: 7.93  size:159157
    
[libx264 @ 0x7fbe83003000] frame P:2     Avg QP:17.16  size: 61998
    
[libx264 @ 0x7fbe83003000] frame B:4     Avg QP:18.34  size: 48049
    
[libx264 @ 0x7fbe83003000] consecutive B-frames: 14.3% 28.6%  0.0% 57.1%
    
[libx264 @ 0x7fbe83003000] mb I  I16..4: 48.6% 21.6% 29.8%
    
[libx264 @ 0x7fbe83003000] mb P  I16..4:  4.4%  9.8% 19.7%  P16..4: 11.6%  3.0%  2.6%  0.0%  0.0%    skip:48.9%
    
[libx264 @ 0x7fbe83003000] mb B  I16..4:  0.4%  0.5% 13.2%  B16..8: 14.9%  3.9%  2.6%  direct: 1.1%  skip:63.4%  L0:45.0% L1:52.1% BI: 3.0%
    
[libx264 @ 0x7fbe83003000] 8x8 transform intra:19.2% inter:38.3%
    
[libx264 @ 0x7fbe83003000] coded y,uvDC,uvAC intra: 52.3% 63.3% 62.4% inter: 8.6% 7.7% 6.9%
    
[libx264 @ 0x7fbe83003000] i16 v,h,dc,p: 88%  9%  3%  0%
    
[libx264 @ 0x7fbe83003000] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 26% 12% 45%  2%  2%  3%  2%  3%  4%
    
[libx264 @ 0x7fbe83003000] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 24% 26% 18%  5%  5%  5%  5%  6%  6%
    
[libx264 @ 0x7fbe83003000] i8c dc,h,v,p: 55% 18% 20%  8%
    
[libx264 @ 0x7fbe83003000] Weighted P-Frames: Y:0.0% UV:0.0%
    
[libx264 @ 0x7fbe83003000] ref P L0: 93.3%  0.3%  3.7%  2.8%
    
[libx264 @ 0x7fbe83003000] ref B L0: 85.2% 14.8%
    
[libx264 @ 0x7fbe83003000] ref B L1: 87.8% 12.2%
    
[libx264 @ 0x7fbe83003000] kb/s:11.52
    
[aac @ 0x7fbe83004800] Qavg: 1971.172

    The problem is that the mp4 has 00:06:45 duration, and the music finished at 00:05:28

    How do I chop the last silent bit off ?

    I tried the following :

    ffmpeg -ss 0 -i 20170817.mp4 -to 00:05:28 -c copy cut.mp4

    Which is worse. Adds blank silent video at front, and chop the video at middle which yet to finish.

    Please note the first 5 images are correct at right music positions, only last image duration error

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