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• ffmpeg concat compressed video result in wrong time span

  15 juillet 2019, par Kris Roofe

  I use

  ffmpeg.exe -f concat -i file_path_list_txt -c copy out_out.mp4

  to concat

  for file in 1265_*; do ffmpeg -i $file -crf 30 -b:a 23k -b:v 96k -threads 3 -y 'out_'$file; done

  compressed video.

  When I play the generated video, the player shows the video length is much longer than the sum of compressed video pieces. And at the linkage between slices,the frame can play a very long time,time on the player is going on,but the frame is still.

  I use ffprobe to show the original video pieces and compressed video pieces. And found the original videos with same tbr,tbn,tbc, while the compressed not.

  Original videos :

  Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, progressive), 1600x1144, 134 kb/s, 8.17 fps, 600 tbr, 600 tbn, 1200 tbc (default)
  
  Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, progressive), 1600x1144, 138 kb/s, 9.73 fps, 600 tbr, 600 tbn, 1200 tbc (default)

  Compressed videos :

  Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1600x1144, 174 kb/s, 8.17 fps, 8.17 tbr, 245050 tbn, 16.33 tbc (default)
  
  Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1600x1144, 127 kb/s, 9.73 fps, 9.73 tbr, 1750800 tbn, 19.45 tbc (default)

  And when I concat, in the console,ffmpeg show below info :

  [mp4 @ 000001fe0193b700] Application provided duration: 2585263321 / timestamp: 6303355764 is out of range for mov/mp4 format
  
  [mp4 @ 000001fe0193b700] pts has no value
  
  [mp4 @ 000001fe0193b700] Application provided duration: 2585443321 / timestamp: 6303535765 is out of range for mov/mp4 format
  
  [mp4 @ 000001fe0193b700] pts has no value

  In my situation the video pieces are generated time by time, and I don’t know when it stops, so I cannot do concat before compress. Each time a video piece generated I comress it and append it.

• Mp4 render result from ffmpeg not playable on android

  11 juillet 2019, par albert

  I’m using PHP to run ffmpeg(4.0.2) render out MP4 file.
  MP4 file playable on all of iOS device, and most laptop, but not playable on android device.

  Here is the ffmpeg code I use to render the video

  /usr/local/bin/ffmpeg -filter_complex "[0]reverse[r];[0][r]concat, loop=1:65, setpts=N/15/TB" -r 15 -f image2 -i /Source/0001_CAM%02d.jpg -c:v libx264 -preset fast -crf 19 -profile:v baseline -movflags +faststart -pix_fmt yuv420p /Result/output.mp4

  Here is the log

  [0] => ffmpeg version N-91590-geb1860e017-tessus Copyright (c) 2000-2018 the FFmpeg developers
  
      [1] =>   built with Apple LLVM version 9.1.0 (clang-902.0.39.2)
  
      [2] =>   configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --extra-version=tessus --enable-avisynth --enable-fontconfig --enable-gpl --enable-libaom --enable-libass --enable-libbluray --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libmysofa --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopus --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-version3 --pkg-config-flags=--static --disable-ffplay
  
      [3] =>   libavutil      56. 18.102 / 56. 18.102
  
      [4] =>   libavcodec     58. 22.101 / 58. 22.101
  
      [5] =>   libavformat    58. 17.101 / 58. 17.101
  
      [6] =>   libavdevice    58.  4.101 / 58.  4.101
  
      [7] =>   libavfilter     7. 26.100 /  7. 26.100
  
      [8] =>   libswscale      5.  2.100 /  5.  2.100
  
      [9] =>   libswresample   3.  2.100 /  3.  2.100
  
      [10] =>   libpostproc    55.  2.100 / 55.  2.100
  
      [11] => Input #0, image2, from '/Source/0001_CAM%02d.jpg':
  
      [12] =>   Duration: 00:00:00.33, start: 0.000000, bitrate: N/A
  
      [13] =>     Stream #0:0: Video: mjpeg, yuvj422p(pc, bt470bg/unknown/unknown), 3456x2304, 15 tbr, 15 tbn, 15 tbc
  
      [14] => Stream mapping:
  
      [15] =>   Stream #0:0 (mjpeg) -> reverse
  
      [16] =>   Stream #0:0 (mjpeg) -> concat:in0:v0
  
      [17] =>   setpts -> Stream #0:0 (libx264)
  
      [18] => Press [q] to stop, [?] for help
  
      [19] => [swscaler @ 0x1077f9000] deprecated pixel format used, make sure you did set range correctly
  
      [20] => [libx264 @ 0x7fd583800600] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
  
      [21] => [libx264 @ 0x7fd583800600] profile Constrained Baseline, level 5.1, 4:2:0, 8-bit
  
      [22] => [libx264 @ 0x7fd583800600] 264 - core 157 r2932 303c484 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=0 ref=2 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=6 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=15 scenecut=40 intra_refresh=0 rc_lookahead=30 rc=crf mbtree=1 crf=19.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
      [23] => Output #0, mp4, to '/Result/output.mp4':
  
      [24] =>   Metadata:
  
      [25] =>     encoder         : Lavf58.17.101
  
      [26] =>     Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 3456x2304, q=-1--1, 15 fps, 15360 tbn, 15 tbc (default)
  
      [27] =>     Metadata:
  
      [28] =>       encoder         : Lavc58.22.101 libx264
  
      [29] =>     Side data:
  
      [30] =>       cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
      [31] => frame=    8 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  [mp4 @ 0x7fd583804a00] Starting second pass: moving the moov atom to the beginning of the file
  
      [32] => frame=   20 fps=5.1 q=-1.0 Lsize=   10642kB time=00:00:01.26 bitrate=68823.6kbits/s speed=0.322x
  
      [33] => video:10641kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.009452%
  
      [34] => [libx264 @ 0x7fd583800600] frame I:4     Avg QP:17.92  size:895006
  
      [35] => [libx264 @ 0x7fd583800600] frame P:16    Avg QP:19.96  size:457246
  
      [36] => [libx264 @ 0x7fd583800600] mb I  I16..4: 11.5%  0.0% 88.5%
  
      [37] => [libx264 @ 0x7fd583800600] mb P  I16..4:  4.1%  0.0% 25.0%  P16..4: 27.7% 19.0%  6.8%  0.0%  0.0%    skip:17.3%
  
      [38] => [libx264 @ 0x7fd583800600] coded y,uvDC,uvAC intra: 92.9% 89.0% 56.0% inter: 51.3% 65.2% 3.9%
  
      [39] => [libx264 @ 0x7fd583800600] i16 v,h,dc,p: 28%  5% 14% 52%
  
      [40] => [libx264 @ 0x7fd583800600] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 24% 12% 15%  8%  9% 10%  7%  8%  6%
  
      [41] => [libx264 @ 0x7fd583800600] i8c dc,h,v,p: 47% 16% 29%  8%
  
      [42] => [libx264 @ 0x7fd583800600] ref P L0: 81.6% 18.4%
  
      [43] => [libx264 @ 0x7fd583800600] kb/s:65375.79

• "Non-monotonous DTS in output stream 0:0 This may result in incorrect timestamps in the output file." error

  1er août 2019, par petaire

  I’m trying to go from .mkv to .mp4 through ffmpeg. Normally I would use

  ffmpeg -i $1 -codec copy -strict -2 $2

  But on this particular file, I get this error, like, A LOT :

  Non-monotonous DTS in output stream 0:0; previous: 49189232, current: 49189232; changing to 49189233. This may result in incorrect timestamps in the output file.

  I guess it has something to do with the DTS :

  [mp4 @ 0x7f8b14001200] Invalid DTS: 14832 PTS: 13552 in output stream 0:0, replacing by guess
  
  [mp4 @ 0x7f8b14001200] Invalid DTS: 15472 PTS: 12272 in output stream 0:0, replacing by guess

  I would not care if the result was ok, but the sound is out of sync, and the video is "stuttering". Feels like everything is out of sync.

  I’ve tried a lot of things, including -async 1 -vsync 1 , but nothing seems to work.

  Here’s some mediainfo :

  Complete name                            : /Users/petaire/Desktop/CNEWS-2019-07-23_16-00-00h.mkv
  
  Format                                   : Matroska
  
  Format version                           : Version 2
  
  File size                                : 1.19 GiB
  
  Movie name                               : Time-2019-07-23_16:00
  
  Writing application                      : Tvheadend 4.3-1801~g7f952c2ed
  
  Writing library                          : Tvheadend Matroska muxer
  
  Original source form                     : TV
  
  Comment                                  : Time recording
  
  IsTruncated                              : Yes
  
  DATE_BROADCASTED                         : 2019-07-23 16:00:00
  
  
  
  Video
  
  ID                                       : 1
  
  Format                                   : AVC
  
  Format/Info                              : Advanced Video Codec
  
  Format profile                           : High@L4
  
  Format settings                          : CABAC / 4 Ref Frames
  
  Format settings, CABAC                   : Yes
  
  Format settings, ReFrames                : 4 frames
  
  Codec ID                                 : V_MPEG4/ISO/AVC
  
  Width                                    : 1 920 pixels
  
  Height                                   : 1 080 pixels
  
  Display aspect ratio                     : 16:9
  
  Frame rate mode                          : Constant
  
  Frame rate                               : 25.000 fps
  
  Standard                                 : Component
  
  Color space                              : YUV
  
  Chroma subsampling                       : 4:2:0
  
  Bit depth                                : 8 bits
  
  Scan type                                : MBAFF
  
  Scan type, store method                  : Interleaved fields
  
  Scan order                               : Top Field First
  
  Language                                 : English
  
  Default                                  : Yes
  
  Forced                                   : No
  
  Color range                              : Limited
  
  Color primaries                          : BT.709
  
  Transfer characteristics                 : BT.709
  
  Matrix coefficients                      : BT.709
  
  
  
  Audio
  
  ID                                       : 2
  
  Format                                   : E-AC-3
  
  Format/Info                              : Enhanced AC-3
  
  Commercial name                          : Dolby Digital Plus
  
  Codec ID                                 : A_EAC3
  
  Bit rate mode                            : Constant
  
  Bit rate                                 : 128 Kbps
  
  Channel(s)                               : 2 channels
  
  Channel layout                           : L R
  
  Sampling rate                            : 48.0 KHz
  
  Frame rate                               : 31.250 fps (1536 SPF)
  
  Compression mode                         : Lossy
  
  Delay relative to video                  : -757ms
  
  Language                                 : French
  
  Service kind                             : Complete Main
  
  Default                                  : Yes
  
  Forced                                   : No
  
  
  
  Text
  
  ID                                       : 3
  
  Format                                   : DVB Subtitle
  
  Codec ID                                 : S_DVBSUB
  
  Codec ID/Info                            : Picture based subtitle format used on DVBs
  
  Language                                 : French
  
  Default                                  : Yes
  
  Forced                                   : No

  Any idea ?