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• ffmpeg conversion using libx264 looks terrible - interlaced

  17 juin 2016, par justin

  I’m in the process of converting some files from my set-top box (.ASF) format to something more portable that will work with plex and roku more readily. In doing so I’m using ffmpeg, but having unsatisfying results. Whereas the original doesn’t have ANY notable interlacing defects, the converted file does. I think it has something to do with the libx264 converter because of the following experiment :

  Running this command :

  ffmpeg -i file.asf -vcodec copy -acodec copy -bsf:a aac_adtstoasc -ss 150 -t 15 short.mp4

  ffmpeg version 3.0.2 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with Apple LLVM version 7.3.0 (clang-703.0.29)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/3.0.2 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-opencl --enable-libx264 --enable-libmp3lame --enable-libxvid --enable-vda
  
    libavutil      55. 17.103 / 55. 17.103
  
    libavcodec     57. 24.102 / 57. 24.102
  
    libavformat    57. 25.100 / 57. 25.100
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 31.100 /  6. 31.100
  
    libavresample   3.  0.  0 /  3.  0.  0
  
    libswscale      4.  0.100 /  4.  0.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  [asf @ 0x7f9f84000000] Could not find codec parameters for stream 2 (Unknown: none): unknown codec
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  Input #0, asf, from 'file.asf':
  
    Metadata:
  
      title           : Slingbox
  
      artist          : Sling Media
  
      comment         : test
  
    Duration: N/A, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: h264 (High) (h264 / 0x34363268), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 30.30 fps, 30 tbr, 1k tbn, 59.94 tbc
  
      Stream #0:1: Audio: aac (LC) ([255][0][0][0] / 0x00FF), 32000 Hz, stereo, fltp, 96 kb/s
  
      Stream #0:2: Unknown: none
  
  File 'short.mp4' already exists. Overwrite ? [y/N] y
  
  Output #0, mp4, to 'short.mp4':
  
    Metadata:
  
      title           : Slingbox
  
      artist          : Sling Media
  
      comment         : test
  
      encoder         : Lavf57.25.100
  
      Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 30.30 fps, 30 tbr, 16k tbn, 1k tbc
  
      Stream #0:1: Audio: aac (LC) ([64][0][0][0] / 0x0040), 32000 Hz, stereo, 96 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
    Stream #0:1 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
  [mp4 @ 0x7f9f8388c200] Timestamps are unset in a packet for stream 0. This is deprecated and will stop working in the future. Fix your code to set the timestamps properly
  
  [mp4 @ 0x7f9f8388c200] pts has no value
  
      Last message repeated 449 times
  
  frame=  450 fps=0.0 q=-1.0 Lsize=    9002kB time=00:00:15.02 bitrate=4907.9kbits/s speed=92.1x    
  
  video:8817kB audio:173kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.125406%

  Which produces a file which has no interlacing artifact and appears to be same exact file size as the original (if run without the -ss and -t commands).

  But running this command (without any options) :

  ffmpeg -i test.asf -ss 150 -t 15 short2.mp4

  ffmpeg version 3.0.2 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with Apple LLVM version 7.3.0 (clang-703.0.29)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/3.0.2 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-opencl --enable-libx264 --enable-libmp3lame --enable-libxvid --enable-vda
  
    libavutil      55. 17.103 / 55. 17.103
  
    libavcodec     57. 24.102 / 57. 24.102
  
    libavformat    57. 25.100 / 57. 25.100
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 31.100 /  6. 31.100
  
    libavresample   3.  0.  0 /  3.  0.  0
  
    libswscale      4.  0.100 /  4.  0.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  [asf @ 0x7fec32801400] Could not find codec parameters for stream 2 (Unknown: none): unknown codec
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  Input #0, asf, from 'test.asf':
  
    Metadata:
  
      title           : Slingbox
  
      artist          : Sling Media
  
      comment         : test
  
    Duration: N/A, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: h264 (High) (h264 / 0x34363268), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 30.30 fps, 30 tbr, 1k tbn, 59.94 tbc
  
      Stream #0:1: Audio: aac (LC) ([255][0][0][0] / 0x00FF), 32000 Hz, stereo, fltp, 96 kb/s
  
      Stream #0:2: Unknown: none
  
  [libx264 @ 0x7fec32102800] using SAR=1/1
  
  [libx264 @ 0x7fec32102800] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
  
  [libx264 @ 0x7fec32102800] profile High, level 4.0
  
  [libx264 @ 0x7fec32102800] 264 - core 148 r2668 fd2c324 - H.264/MPEG-4 AVC codec - Copyleft 2003-2016 - - 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=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 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 'short2.mp4':
  
    Metadata:
  
      title           : Slingbox
  
      artist          : Sling Media
  
      comment         : test
  
      encoder         : Lavf57.25.100
  
      Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 30 fps, 15360 tbn, 30 tbc
  
      Metadata:
  
        encoder         : Lavc57.24.102 libx264
  
      Side data:
  
        unknown side data type 10 (24 bytes)
  
      Stream #0:1: Audio: aac (LC) ([64][0][0][0] / 0x0040), 32000 Hz, stereo, fltp, 128 kb/s
  
      Metadata:
  
        encoder         : Lavc57.24.102 aac
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  
    Stream #0:1 -> #0:1 (aac (native) -> aac (native))
  
  Press [q] to stop, [?] for help
  
  frame=  450 fps= 20 q=-1.0 Lsize=    6732kB time=00:00:15.00 bitrate=3674.9kbits/s speed=0.657x    
  
  video:6481kB audio:240kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.168370%
  
  [libx264 @ 0x7fec32102800] frame I:12    Avg QP:18.85  size: 39804
  
  [libx264 @ 0x7fec32102800] frame P:291   Avg QP:21.40  size: 17543
  
  [libx264 @ 0x7fec32102800] frame B:147   Avg QP:22.61  size:  7167
  
  [libx264 @ 0x7fec32102800] consecutive B-frames: 42.9% 36.9% 11.3%  8.9%
  
  [libx264 @ 0x7fec32102800] mb I  I16..4: 43.2% 52.0%  4.8%
  
  [libx264 @ 0x7fec32102800] mb P  I16..4: 11.9% 16.0%  1.0%  P16..4: 30.2%  3.0%  1.7%  0.0%  0.0%    skip:36.2%
  
  [libx264 @ 0x7fec32102800] mb B  I16..4:  0.6%  0.9%  0.1%  B16..8: 25.7%  1.4%  0.2%  direct: 4.6%  skip:66.6%  L0:49.0% L1:49.4% BI: 1.6%
  
  [libx264 @ 0x7fec32102800] 8x8 transform intra:55.1% inter:92.0%
  
  [libx264 @ 0x7fec32102800] coded y,uvDC,uvAC intra: 22.5% 38.6% 6.6% inter: 6.5% 17.3% 0.5%
  
  [libx264 @ 0x7fec32102800] i16 v,h,dc,p: 28% 47%  8% 17%
  
  [libx264 @ 0x7fec32102800] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 34% 15% 42%  1%  1%  2%  1%  2%  1%
  
  [libx264 @ 0x7fec32102800] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 10% 78%  6%  1%  1%  1%  1%  1%  1%
  
  [libx264 @ 0x7fec32102800] i8c dc,h,v,p: 59% 19% 19%  3%
  
  [libx264 @ 0x7fec32102800] Weighted P-Frames: Y:14.4% UV:3.8%
  
  [libx264 @ 0x7fec32102800] ref P L0: 65.5%  6.6% 19.0%  8.4%  0.4%
  
  [libx264 @ 0x7fec32102800] ref B L0: 89.6%  8.9%  1.5%
  
  [libx264 @ 0x7fec32102800] ref B L1: 98.6%  1.4%
  
  [libx264 @ 0x7fec32102800] kb/s:3539.34
  
  [aac @ 0x7fec32103a00] Qavg: 573.580

  Produces a file which has quite a bit of interlacing defect when playing on my HD projector thru Roku via Plex (direct play enabled, apparently no transcoding).

  

  Lest I be overly picky, I engaged my wife in this test, showing her the two files and she agreed that the one that used libx264 was significantly worse and unwatchable. Can’t figure out how to shrink this file down without causing these interlacing defects — it happens even when I don’t try to shrink it ! Any thoughts ?

  Video files :

  https://dl.dropboxusercontent.com/u/23091/m1/short.mp4
  https://dl.dropboxusercontent.com/u/23091/m1/short2.mp4

  Update : Additionally, I tried a few settings to generate a MPEG4 (.AVI) file and had similar lack of success. Similar interlacing defects.

• ffmpeg not giving correct duration of a mp4

  1er juin 2012, par oach

  I am working with ffmpeg to convert videos into flv files via php. The tests I have done do not work for mp4 conversions. I have a 13 second video (videos will be limited to 15 seconds), when it is uploaded and I check the "duration" of the video it comes out over 300 seconds. I have tried changing around how I process the video :

  // original
  
  exec(&#39;ffmpeg -i <path>/<filename> 2>&amp;1&#39;, $output);
  
  
  
  // current
  
  exec(&#39;ffmpeg -i <path>/<filename> 2>&amp;1 | grep "Duration" | cut -d \&#39; \&#39; -f 4 | sed s/,//&#39;, $output);
  
  </filename></path></filename></path>

  The original method did not work for mpg files but the second does, but neither gives me the "correct" duration of a mp4 video. Is there a "special" way to process mp4 files ?

  Thank you for your time and help.

  Update :

  Command line

  ffmpeg -i ./custom_scraping.mp4 2>&1 | grep "Duration" | cut -d ' ' -f 4 | sed s/,//
  
  00:05:15.84

  Complete output (formatted as best I could)

  ffmpeg -i ./custom_scraping.mp4 2>&1
  
  FFmpeg version 0.6.5, Copyright (c) 2000-2010 the FFmpeg developers
  
  built on Jan 29 2012 23:55:02 with gcc 4.1.2 20080704 (Red Hat 4.1.2-51)
  
  configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --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 -m64 -mtune=generic -fPIC' --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
  
  
  
  Seems stream 1 codec frame rate differs from container frame rate: 5994.00 (5994/1) -> 29.97 (2997/100)
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from './custom_scraping.mp4':
  
  Metadata:
  
  major_brand     : mp42
  
  minor_version   : 1
  
  compatible_brands: mp42avc1
  
  Duration: 00:05:15.84, start: 0.000000, bitrate: 36 kb/s
  
  Stream #0.0(eng): Audio: aac, 44100 Hz, stereo, s16, 2 kb/s
  
  Stream #0.1(eng): Video: h264, yuv420p, 480x360, 36 kb/s, 1.04 fps, 29.97 tbr, 2997 tbn, 5994 tbc

  At least one output file must be specified

  Don't know if it helps but from the listing of the file in Linux :
  1432471 May 31 13:33 custom_scraping.mp4

  Let me know if anything else is needed.

• FFMPEG av_interleaved_write_frame() : Operation not permitted

  20 octobre 2014, par camslaz

  Ok I receiving a ’av_interleaved_write_frame() : Operation not permitted’ error while trying to encode an MOV file. Firstly I need to outline the conditions behind it.

  I am encoding 12 different files of different resolution sizes and format types via a PHP script that runs on cron. Basically it grabs a 250mb HD MOV file and encodes it in 4 different frame sizes as MOV, MP4 and WMV file types.

  Now the script takes over 10mins to run and encode each of the files for the 250mb input file. I am outputting the processing times and as soon as the time on the script hits 10mins FFMPEG crashes and returns "av_interleaved_write_frame() : Operation not permitted" for the current file being encoded and all other remaining files yet to be encoded.

  If the input videos is 150MB the total time the script runs for is under 10mins so it encodes all of the videos fine. Additionally if I run the FFMPEG command on the individual file that it fails on for the 250mb file it encodes the file with no issues.

  From doing to research on the error "av_interleaved_write_frame()" it seems it is related to timestamps of what I understand to be of the input file. But in saying that it doesn’t seem to be the case in my instance because I can encode the file with no problem if I do it individually.

  example ffmpeg command

  ffmpeg -i GVowbt3vsrXL.mov -s 1920x1080 -sameq -vf "unsharp" -y GVowbt3vsrXL_4.wmv

  Error output on the failed file at 10mins. Remember there is no issue with the command if I run it by itself it is only when the script hits 10mins.

  'output' =>
  
       array (
  
         0 => 'FFmpeg version SVN-r24545, Copyright (c) 2000-2010 the FFmpeg developers',
  
         1 => '  built on Aug 20 2010 23:32:02 with gcc 4.1.2 20080704 (Red Hat 4.1.2-48)',
  
         2 => '  configuration: --enable-shared --enable-gpl --enable-pthreads --enable-nonfree --cpu=opteron --extra-cflags=\'-O3 -march=opteron -mtune=opteron\' --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-avfilter --enable-filter=movie --enable-avfilter-lavf --enable-swscale',
  
         3 => '  libavutil     50.23. 0 / 50.23. 0',
  
         4 => '  libavcore      0. 1. 0 /  0. 1. 0',
  
         5 => '  libavcodec    52.84. 1 / 52.84. 1',
  
         6 => '  libavformat   52.77. 0 / 52.77. 0',
  
         7 => '  libavdevice   52. 2. 0 / 52. 2. 0',
  
         8 => '  libavfilter    1.26. 1 /  1.26. 1',
  
         9 => '  libswscale     0.11. 0 /  0.11. 0',
  
         10 => 'Input #0, mov,mp4,m4a,3gp,3g2,mj2, from \'/home/hdfootage/public_html/process/VideoEncode/_tmpfiles/GVowbt3vsrXL/GVowbt3vsrXL.mov\':',
  
         11 => '  Metadata:',
  
         12 => '    major_brand     : qt',
  
         13 => '    minor_version   : 537199360',
  
         14 => '    compatible_brands: qt',
  
         15 => '  Duration: 00:00:20.00, start: 0.000000, bitrate: 110802 kb/s',
  
         16 => '    Stream #0.0(eng): Video: mjpeg, yuvj422p, 1920x1080 [PAR 72:72 DAR 16:9], 109386 kb/s, 25 fps, 25 tbr, 25 tbn, 25 tbc',
  
         17 => '    Stream #0.1(eng): Audio: pcm_s16be, 44100 Hz, 2 channels, s16, 1411 kb/s',
  
         18 => '[buffer @ 0xdcd0e0] w:1920 h:1080 pixfmt:yuvj422p',
  
         19 => '[unsharp @ 0xe00280] auto-inserting filter \'auto-inserted scaler 0\' between the filter \'src\' and the filter \'Filter 0 unsharp\'',
  
         20 => '[scale @ 0xe005b0] w:1920 h:1080 fmt:yuvj422p -> w:1920 h:1080 fmt:yuv420p flags:0xa0000004',
  
         21 => '[unsharp @ 0xe00280] effect:sharpen type:luma msize_x:5 msize_y:5 amount:1.00',
  
         22 => '[unsharp @ 0xe00280] effect:none type:chroma msize_x:0 msize_y:0 amount:0.00',
  
         23 => 'Output #0, asf, to \'/home/hdfootage/public_html/process/VideoEncode/_tmpfiles/GVowbt3vsrXL/GVowbt3vsrXL_4.wmv\':',
  
         24 => '  Metadata:',
  
         25 => '    WM/EncodingSettings: Lavf52.77.0',
  
         26 => '    Stream #0.0(eng): Video: msmpeg4, yuv420p, 1920x1080 [PAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 1k tbn, 25 tbc',
  
         27 => '    Stream #0.1(eng): Audio: libmp3lame, 44100 Hz, 2 channels, s16, 64 kb/s',
  
         28 => 'Stream mapping:',
  
         29 => '  Stream #0.0 -> #0.0',
  
         30 => '  Stream #0.1 -> #0.1',
  
         31 => 'Press [q] to stop encoding',
  
         32 => '[msmpeg4 @ 0xdccb50] warning, clipping 1 dct coefficients to -127..127',

  Then it errors

  frame=   75 fps=  5 q=1.0 size=   12704kB time=2.90 bitrate=3588 6.0kbits av_interleaved_write_frame(): Operation not permitted',
  
       )

  Has any anybody encountered this sort of problem before ? It seems to be something to do with the timestamps but only because the script is running for a period longer then 10mins. It maybe related to PHP/Apache config but I don’t know if it is FFMPEG or if it is server config I need to be looking at.