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• How can low frame rate video be made to look more smooth ?

  26 octobre 2017, par d3pd

  I am trying to clean up a video that was recorded in 2003 in low-light conditions on what was possibly a cameraphone. The video has been cleaned up somewhat (cropped, logos removed and stabilized), but it remains quite jerky, due in large part to its low frame rate. What are some tricks that might clean up the video in this regard ? I feel that I am asking for something a bit like tweening in flash animations, but for pixels, whereby additional frames are generated using nearby frames of the video. Does such a trick exist ? Is there another way to approach this problem ?

  To reproduce the video processing so far, take the following steps :

  # get video
  
  wget http://www.anwarweb.net/saddamdown.wmv
  
  # crop
  
  ffmpeg -i saddamdown.wmv -filter:v "crop=292:221:14:10" -c:a copy saddamdown_crop.wmv
  
  # remove logo 1
  
  ffmpeg -i saddamdown_crop.wmv -vf delogo=x=17:y=77:w=8:h=54 -c:a copy saddamdown_crop_delogo_1.wmv
  
  # remove logo 2
  
  ffmpeg -i saddamdown_crop_delogo_1.wmv -vf delogo=x=190:y=174:w=54:h=8 -c:a copy saddamdown_crop_delogo_1_delogo_2.wmv
  
  # stabilize
  
  ffmpeg -i saddamdown_crop_delogo_1_delogo_2.wmv -vf deshake saddamdown_crop_delogo_1_delogo_2_deshake.wmv

  Note : The video is of the Saddam Hussein execution.

• Ffmpeg not fully functioning

  26 août 2014, par Joshua

  Hello i have problem with ffmpeg i’m using phpvibe cms already asked in their forums but they don’t know the answer which leads me that it’s probably my fault so the problem is when i upload :

  6 seconds avi video which weights 817 KB it uploads perfectlly plays like it should run.

  However when i try upload 12mb avi sample i see that it does not work in folder where should be that video converted it shows 0kb size

  That means it didn’t start converting somewhow i think this is ffmpeg issue also i have spoted that my ffmpeg is placed in /usr/local/bin/ and in phpvibe cms systems there is different location for ffmpeg it looks like this : Img link

  Why when i upload small avi video it converts good and when i try longer it fails maybe it converts while upload process is going on but than why it shows 0b in folder where converted videos should be placed ?

  P.s i tried couple avi videos that weights more than 10 mb same thing and my code for ffmpeg conversation is :

  $output ="{ffmpeg-cmd} -i {input} -vcodec libx264 -s {ffmpeg-vsize} -threads 4 -movflags faststart {output}.mp4";

  Also tried :

  output ="{ffmpeg-cmd} -i {input} -vcodec libx264 -s {ffmpeg-vsize} -threads 4 {output}.mp4 2>&1";

  Same thing + im using Debian 7 Wheezy. Thanks !

  EDIT :

  i have made a test script it gives this output :

  array(21) {
  
    [0]=>
  
    string(83) "ffmpeg version git-2014-08-25-bb29896 Copyright (c) 2000-2014 the FFmpeg developers"
  
    [1]=>
  
    string(61) "  built on Aug 25 2014 19:52:12 with gcc 4.7 (Debian 4.7.2-5)"
  
    [2]=>
  
    string(62) "  configuration: --enable-shared --enable-libx264 --enable-gpl"
  
    [3]=>
  
    string(40) "  libavutil      54.  7.100 / 54.  7.100"
  
    [4]=>
  
    string(40) "  libavcodec     56.  0.101 / 56.  0.101"
  
    [5]=>
  
    string(40) "  libavformat    56.  3.100 / 56.  3.100"
  
    [6]=>
  
    string(40) "  libavdevice    56.  0.100 / 56.  0.100"
  
    [7]=>
  
    string(40) "  libavfilter     5.  0.103 /  5.  0.103"
  
    [8]=>
  
    string(40) "  libswscale      3.  0.100 /  3.  0.100"
  
    [9]=>
  
    string(40) "  libswresample   1.  1.100 /  1.  1.100"
  
    [10]=>
  
    string(40) "  libpostproc    53.  0.100 / 53.  0.100"
  
    [11]=>
  
    string(31) "Input #0, avi, from 'test.avi':"
  
    [12]=>
  
    string(11) "  Metadata:"
  
    [13]=>
  
    string(36) "    encoder         : Nandub v1.0rc2"
  
    [14]=>
  
    string(60) "  Duration: 00:01:09.78, start: 0.000000, bitrate: 1517 kb/s"
  
    [15]=>
  
    string(126) "    Stream #0:0: Video: msmpeg4v3 (DIV3 / 0x33564944), yuv420p, 640x352, 1279 kb/s, 23.98 fps, 23.98 tbr, 23.98 tbn, 23.98 tbc"
  
    [16]=>
  
    string(83) "    Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 48000 Hz, stereo, s16p, 222 kb/s"
  
    [17]=>
  
    string(87) "[libx264 @ 0x6c31e0] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX"
  
    [18]=>
  
    string(44) "[libx264 @ 0x6c31e0] profile High, level 3.0"
  
    [19]=>
  
    string(649) "[libx264 @ 0x6c31e0] 264 - core 124 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - 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=4 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=23 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"
  
    [20]=>
  
    string(131) "[aac @ 0x6c3c20] The encoder 'aac' is experimental but experimental codecs are not enabled, add '-strict -2' if you want to use it."
  
  }
  
  int(1)

  i get this output with this :

  $output ="{ffmpeg-cmd} -y -i {input} {output}.mp4 2<&1"";

  simple ffmpeg command also tried :

  $output ="{ffmpeg-cmd} -i {input} -vcodec libx264 -s {ffmpeg-vsize} -threads 4 {output}.mp4 2>&1";

  With this command it gives this output :

  array(21) {
  
    [0]=>
  
    string(83) "ffmpeg version git-2014-08-25-bb29896 Copyright (c) 2000-2014 the FFmpeg developers"
  
    [1]=>
  
    string(61) "  built on Aug 25 2014 19:52:12 with gcc 4.7 (Debian 4.7.2-5)"
  
    [2]=>
  
    string(62) "  configuration: --enable-shared --enable-libx264 --enable-gpl"
  
    [3]=>
  
    string(40) "  libavutil      54.  7.100 / 54.  7.100"
  
    [4]=>
  
    string(40) "  libavcodec     56.  0.101 / 56.  0.101"
  
    [5]=>
  
    string(40) "  libavformat    56.  3.100 / 56.  3.100"
  
    [6]=>
  
    string(40) "  libavdevice    56.  0.100 / 56.  0.100"
  
    [7]=>
  
    string(40) "  libavfilter     5.  0.103 /  5.  0.103"
  
    [8]=>
  
    string(40) "  libswscale      3.  0.100 /  3.  0.100"
  
    [9]=>
  
    string(40) "  libswresample   1.  1.100 /  1.  1.100"
  
    [10]=>
  
    string(40) "  libpostproc    53.  0.100 / 53.  0.100"
  
    [11]=>
  
    string(31) "Input #0, avi, from 'test.avi':"
  
    [12]=>
  
    string(11) "  Metadata:"
  
    [13]=>
  
    string(36) "    encoder         : Nandub v1.0rc2"
  
    [14]=>
  
    string(60) "  Duration: 00:01:09.78, start: 0.000000, bitrate: 1517 kb/s"
  
    [15]=>
  
    string(126) "    Stream #0:0: Video: msmpeg4v3 (DIV3 / 0x33564944), yuv420p, 640x352, 1279 kb/s, 23.98 fps, 23.98 tbr, 23.98 tbn, 23.98 tbc"
  
    [16]=>
  
    string(83) "    Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 48000 Hz, stereo, s16p, 222 kb/s"
  
    [17]=>
  
    string(88) "[libx264 @ 0x13046c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX"
  
    [18]=>
  
    string(45) "[libx264 @ 0x13046c0] profile High, level 3.0"
  
    [19]=>
  
    string(650) "[libx264 @ 0x13046c0] 264 - core 124 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - 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=4 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=23 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"
  
    [20]=>
  
    string(132) "[aac @ 0x13055a0] The encoder 'aac' is experimental but experimental codecs are not enabled, add '-strict -2' if you want to use it."
  
  }
  
  int(1)

  And also tried thi command :

  $output ="{ffmpeg-cmd} -i {input} -vcodec libx264 -s {ffmpeg-vsize} -threads 4 -movflags faststart {output}.mp4";

  And with this it gives :

      array(0) {
  
  }
  
  int(1)

  in all cases file that weitghs 12 mb doest not convert it’s 0kb in ftp

• Using ffmpeg to generate multiple resolutions with the exact same keyframe positions

  2 novembre 2014, par bacon overlord

  There are a bunch of resources on how to use ffmpeg to convert X to Y and so forth but I can’t seem to be able to generate different resolutions of the same file with the same keyframe and frame positions.

  The keyframe positions are important because they allow the player to jump from one bitrate to another.

  These videos are intended for Flash.

  I keep on getting results like this from the validation tool.

  failed on frame 1670
  
  [FrameInfo 1670, type 9, timecode 23565, seekable 1670]
  
  [FrameInfo 1670, type 9, timecode 23565, seekable 1525]

  Even worse, sometimes it takes to re-ordering the frames

  failed on frame 1
  
  [FrameInfo 1, type 9, timecode 0, seekable 1]
  
  [FrameInfo 1, type 8, timecode 0, seekable -1]

  When trying to validate the sample videos that are installed with Adobe Flash Media Server they are ok

  Comparing files
  
  0: G:\VOD\sample1_150kbps.flv
  
  1: G:\VOD\sample1_500kbps.flv
  
  2: G:\VOD\sample1_700kbps.flv
  
  3: G:\VOD\sample1_1500kbps.flv
  
  Index, Keyframes, and Timecodes are Validated across all files

  Sample ffmpeg command I run at different resolutions. Adobe Media Encoder is also producing video with different keyframe positions so I don’t know whats going on here.

  ffmpeg -i source.mp4 -vf scale=1270:720 -c:a copy output.flv

  ffmpeg 720p

  ffmpeg -i .\big_buck_bunny_1080p_surround.avi -vf scale=1280:720 -vcodec libx264 -profile:v main -acodec libvo_aacenc -b:a 128k -ac 2  big_buck_bunny_720.flv

  ffmpeg 480p

  ffmpeg -i .\big_buck_bunny_1080p_surround.avi -vf scale=854:480 -vcodec libx264 -profile:v main -acodec libvo_aacenc -b:a 128k -ac 2  big_buck_bunny_480.flv

  ffmpeg console output

  ffmpeg version N-59433-g4aa9c91 Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Dec 29 2013 22:01:53 with gcc 4.8.2 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfi
  
  g --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
  
  e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopenco
  
  re-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
  
  eex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-li
  
  bvorbis --enable-libvpx --enable-libwavpack --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  
    libavutil      52. 59.100 / 52. 59.100
  
    libavcodec     55. 47.100 / 55. 47.100
  
    libavformat    55. 22.100 / 55. 22.100
  
    libavdevice    55.  5.102 / 55.  5.102
  
    libavfilter     4.  0.103 /  4.  0.103
  
    libswscale      2.  5.101 /  2.  5.101
  
    libswresample   0. 17.104 /  0. 17.104
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Input #0, avi, from '.\big_buck_bunny_1080p_surround.avi':
  
    Metadata:
  
      encoder         : AVI-Mux GUI 1.17.7, Aug  8 2006  20:59:17
  
      JUNK            :
  
    Duration: 00:09:56.46, start: 0.000000, bitrate: 12455 kb/s
  
      Stream #0:0: Video: mpeg4 (Simple Profile) (FMP4 / 0x34504D46), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 24 tbr, 24 tb
  
  n, 24 tbc
  
      Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz, 5.1(side), fltp, 448 kb/s
  
  File 'big_buck_bunny_720.flv' already exists. Overwrite ? [y/N] Y
  
  [libx264 @ 029deec0] using SAR=1/1
  
  [libx264 @ 029deec0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
  
  [libx264 @ 029deec0] profile Main, level 3.1
  
  [libx264 @ 029deec0] 264 - core 140 r2377 1ca7bb9 - H.264/MPEG-4 AVC codec - Copyleft 2003-2013 - http://www.videolan.or
  
  g/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 m
  
  e_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_thr
  
  eads=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=24 scenecut=40 intra_refresh=0 rc_lookahead=40 r
  
  c=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, flv, to 'big_buck_bunny_720.flv':
  
    Metadata:
  
      JUNK            :
  
      encoder         : Lavf55.22.100
  
      Stream #0:0: Video: h264 (libx264) ([7][0][0][0] / 0x0007), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 1k tbn, 2
  
  4 tbc
  
      Stream #0:1: Audio: aac (libvo_aacenc) ([10][0][0][0] / 0x000A), 48000 Hz, stereo, s16, 128 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mpeg4 -> libx264)
  
    Stream #0:1 -> #0:1 (ac3 -> libvo_aacenc)
  
  Press [q] to stop, [?] for help
  
  frame=14315 fps= 73 q=-1.0 Lsize=  120952kB time=00:09:56.49 bitrate=1661.1kbits/s
  
  video:110887kB audio:9321kB subtitle:0 global headers:0kB muxing overhead 0.619082%
  
  [libx264 @ 029deec0] frame I:151   Avg QP:17.09  size:115286
  
  [libx264 @ 029deec0] frame P:5374  Avg QP:21.41  size: 14154
  
  [libx264 @ 029deec0] frame B:8790  Avg QP:25.91  size:  2284
  
  [libx264 @ 029deec0] consecutive B-frames: 11.5% 15.5% 13.3% 59.7%
  
  [libx264 @ 029deec0] mb I  I16..4: 24.0%  0.0% 76.0%
  
  [libx264 @ 029deec0] mb P  I16..4:  4.0%  0.0%  3.5%  P16..4: 29.3% 11.1%  7.1%  0.0%  0.0%    skip:45.1%
  
  [libx264 @ 029deec0] mb B  I16..4:  0.2%  0.0%  0.4%  B16..8: 22.4%  1.7%  0.4%  direct: 0.8%  skip:74.1%  L0:37.5% L1:5
  
  8.0% BI: 4.5%
  
  [libx264 @ 029deec0] coded y,uvDC,uvAC intra: 51.5% 64.4% 37.6% inter: 7.3% 10.1% 1.3%
  
  [libx264 @ 029deec0] i16 v,h,dc,p: 40% 23%  9% 28%
  
  [libx264 @ 029deec0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 23% 18% 15%  7%  8% 10%  7%  7%  6%
  
  [libx264 @ 029deec0] i8c dc,h,v,p: 51% 21% 17% 10%
  
  [libx264 @ 029deec0] Weighted P-Frames: Y:5.9% UV:3.6%
  
  [libx264 @ 029deec0] ref P L0: 62.4% 16.9% 15.2%  5.3%  0.1%
  
  [libx264 @ 029deec0] ref B L0: 89.3%  9.1%  1.7%
  
  [libx264 @ 029deec0] ref B L1: 94.3%  5.7%
  
  [libx264 @ 029deec0] kb/s:1522.96

  Validation Results

  Comparing files
  
  0: G:\VOD\big_buck_bunny_480.flv
  
  1: G:\VOD\big_buck_bunny_720.flv
  
  >> Comparison failed on frame 13181
  
  0: [FrameInfo 13181, type 9, timecode 185958, seekable 12794]
  
  1: [FrameInfo 13181, type 9, timecode 185958, seekable 13181]