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• How can I reencode a video to match another's codec exactly ?

  24 janvier 2020, par Stephen Schrauger

  When I’m on vacation, I usually use our camcorder to record videos. Since they’re all the same format, I can use ffmpeg to concat them into one large, smooth video without re-encoding.

  However, sometimes I will use a phone or other camera to record a video (if the camcorder ran out of space/battery or was left at a hotel).

  I’d like to determine the codec, framerate, etc used by my camcorder and use those parameters to convert the phone vidoes into the same format. That way, I will be able to concatonate all the videos without re-encoding the camcorder videos.

  Using ffprobe, I found my camcorder has this encoding :

    Input #0, mpegts, from 'camcorderfile.MTS':
  
    Duration: 00:00:09.54, start: 1.936367, bitrate: 24761 kb/s
  
    Program 1 
  
      Stream #0:0[0x1011]: Video: h264 (High) (HDPR / 0x52504448), yuv420p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], 59.94 fps, 59.94 tbr, 90k tbn, 119.88 tbc
  
      Stream #0:1[0x1100]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 256 kb/s
  
      Stream #0:2[0x1200]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090), 1920x1080

  The phone (iPhone 5s) encoding is :

    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'mov.MOV':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 0
  
      compatible_brands: qt  
  
      creation_time   : 2017-01-02T03:04:05.000000Z
  
      com.apple.quicktime.location.ISO6709: +12.3456-789.0123+456.789/
  
      com.apple.quicktime.make: Apple
  
      com.apple.quicktime.model: iPhone 5s
  
      com.apple.quicktime.software: 10.2.1
  
      com.apple.quicktime.creationdate: 2017-01-02T03:04:05-0700
  
    Duration: 00:00:14.38, start: 0.000000, bitrate: 11940 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080, 11865 kb/s, 29.98 fps, 29.97 tbr, 600 tbn, 1200 tbc (default)
  
      Metadata:
  
        creation_time   : 2017-01-02T03:04:05.000000Z
  
        handler_name    : Core Media Data Handler
  
        encoder         : H.264
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 63 kb/s (default)
  
      Metadata:
  
        creation_time   : 2017-01-02T03:04:05.000000Z
  
        handler_name    : Core Media Data Handler
  
      Stream #0:2(und): Data: none (mebx / 0x7862656D), 0 kb/s (default)
  
      Metadata:
  
        creation_time   : 2017-01-02T03:04:05.000000Z
  
        handler_name    : Core Media Data Handler
  
      Stream #0:3(und): Data: none (mebx / 0x7862656D), 0 kb/s (default)
  
      Metadata:
  
        creation_time   : 2017-01-02T03:04:05.000000Z
  
        handler_name    : Core Media Data Handler

  I’m presuming that ffmpeg will automatically take any acceptable video format, and that I only need to figure out the output settings. I think I need to use -s 1920x1080 and -pix_fmt yuv420p for the output, but what other flags do I need in order to make the phone video into the same encoding as the camcorder video ?

  Can I get some pointers as to how I can translate the ffprobe output into the flags I need to give to ffmpeg ?

  Edit : Added the entire Input #0 for both media files.

• restreaming with ffmpeg and ffserver

  13 mars 2014, par Dnaso

  I have been looking all over stack and the net and cannot find the answer (or one that works for me anyway). I have a cerevo liveshell pro which is a video encoder (pretty damn good too). In its RTSP server mode, I am able to watch audio and video on iphone and android. However, It can only hold 3 connections. I want to restream this stream NO encoding of any type on ffserver. Is this possible ? Everything I have tried so far does not open. If I disable my audio in the config file it works and if i disable video and just push audio it works, but both will not. Also I do not want to use ffmpeg if I do not have to because I am not re encoding the stream, since it is already encoded in the correct format, I just want to restream it !.

   ffmpeg -i rtsp://xxx  -vcodec copy -acodec copy http://lclhst:8090/feed1.ffm
  
  
  
  
  
  <stream>
  
     format rtp
  
     videoCodec libx264
  
     AudioCodec aac
  
      I also have global headers for audio and video.
  
  </stream>

  has anyone been able to fix or surpass the issue ?

• FFMPEG unwanted rotation

  5 mars 2015, par Ben

  When I add a watermark image with a landscape orientation to a video that has a portrait orientation the video automatically rotates to landscape. How do I prevent this ? Also, the audio file isn’t being merged into the output. How can I include the audio.mp3 to be the sole audio track ?

  ffmpeg -i 1425500438.MOV -i hashtag.png -itsoffset 00:00:07 -i audio.mp3  -filter_complex "[0:v]curves=preset=vintage[a];[a][1:v]overlay=10:10[out]"  -vcodec libx264 -pix_fmt yuv420p -ss 0:0:07 -t 14 -map "[out]" -y processed.mov

  EDIT****

  ffmpeg version 2.1.4 Copyright (c) 2000-2014 the FFmpeg developers
  
    built on Mar 19 2014 12:48:02 with Apple LLVM version 5.1 (clang-503.0.38) (based on LLVM 3.4svn)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/2.1.4 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-avresample --enable-vda --cc=clang --host-cflags= --host-ldflags= --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-libxvid --enable-libfreetype --enable-libvorbis --enable-libvpx --enable-librtmp --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvo-aacenc --enable-libass --enable-ffplay --enable-libspeex --enable-libschroedinger --enable-libfdk-aac --enable-libopus --enable-frei0r --enable-libopenjpeg --extra-cflags='-I/usr/local/Cellar/openjpeg/1.5.1/include/openjpeg-1.5 '
  
    libavutil      52. 48.101 / 52. 48.101
  
    libavcodec     55. 39.101 / 55. 39.101
  
    libavformat    55. 19.104 / 55. 19.104
  
    libavdevice    55.  5.100 / 55.  5.100
  
    libavfilter     3. 90.100 /  3. 90.100
  
    libavresample   1.  1.  0 /  1.  1.  0
  
    libswscale      2.  5.101 /  2.  5.101
  
    libswresample   0. 17.104 /  0. 17.104
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1425500438.MOV':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 0
  
      compatible_brands: qt  
  
      creation_time   : 2015-03-04 20:20:14
  
      encoder         : 8.1.2
  
      encoder-eng     : 8.1.2
  
      date            : 2015-03-04T14:20:14-0600
  
      date-eng        : 2015-03-04T14:20:14-0600
  
      model           : iPhone 6
  
      model-eng       : iPhone 6
  
      make            : Apple
  
      make-eng        : Apple
  
    Duration: 00:00:10.56, start: 0.000000, bitrate: 703 kb/s
  
      Stream #0:0(und): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p(tv, smpte170m), 480x360, 696 kb/s, 30.02 fps, 30.08 tbr, 600 tbn, 1200 tbc (default)
  
      Metadata:
  
        rotate          : 90
  
        creation_time   : 2015-03-04 20:20:14
  
        handler_name    : Core Media Data Handler
  
  Input #1, image2, from 'hashtag.png':
  
    Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
  
      Stream #1:0: Video: png, rgba, 131x29, 25 tbr, 25 tbn, 25 tbc
  
  Input #2, mp3, from 'audio.mp3':
  
    Metadata:
  
      encoder         : Lavf55.19.104
  
    Duration: 00:00:10.44, start: 0.000000, bitrate: 128 kb/s
  
      Stream #2:0: Audio: mp3, 16000 Hz, stereo, s16p, 128 kb/s
  
  [libx264 @ 0x7f9894017200] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX AVX2 FMA3 BMI1 BMI2
  
  [libx264 @ 0x7f9894017200] profile High, level 3.0
  
  [libx264 @ 0x7f9894017200] 264 - core 125 - 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=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, mov, to 'processed.mov':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 0
  
      compatible_brands: qt  
  
      make-eng        : Apple
  
      make            : Apple
  
      encoder-eng     : 8.1.2
  
      date            : 2015-03-04T14:20:14-0600
  
      date-eng        : 2015-03-04T14:20:14-0600
  
      model           : iPhone 6
  
      model-eng       : iPhone 6
  
      encoder         : Lavf55.19.104
  
      Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 480x360, q=-1--1, 11552 tbn, 30.08 tbc (default)
  
  Stream mapping:
  
    Stream #0:0 (h264) -> curves
  
    Stream #1:0 (png) -> overlay:overlay
  
    overlay -> Stream #0:0 (libx264)
  
  Press [q] to stop, [?] for help
  
  frame=  422 fps=413 q=-1.0 Lsize=     361kB time=00:00:13.96 bitrate= 211.9kbits/s dup=303 drop=0    
  
  video:356kB audio:0kB subtitle:0 global headers:0kB muxing overhead 1.574185%
  
  [libx264 @ 0x7f9894017200] frame I:2     Avg QP:20.09  size: 19764
  
  [libx264 @ 0x7f9894017200] frame P:134   Avg QP:22.29  size:  2248
  
  [libx264 @ 0x7f9894017200] frame B:286   Avg QP:28.02  size:    79
  
  [libx264 @ 0x7f9894017200] consecutive B-frames:  9.2%  0.0%  3.6% 87.2%
  
  [libx264 @ 0x7f9894017200] mb I  I16..4:  6.6% 45.0% 48.4%
  
  [libx264 @ 0x7f9894017200] mb P  I16..4:  1.8%  2.4%  0.7%  P16..4: 40.8% 13.6%  4.5%  0.0%  0.0%    skip:36.1%
  
  [libx264 @ 0x7f9894017200] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8: 10.9%  0.1%  0.0%  direct: 0.0%  skip:89.0%  L0:56.5% L1:42.3% BI: 1.2%
  
  [libx264 @ 0x7f9894017200] 8x8 transform intra:47.6% inter:61.5%
  
  [libx264 @ 0x7f9894017200] coded y,uvDC,uvAC intra: 51.3% 81.4% 36.7% inter: 5.6% 8.5% 0.5%
  
  [libx264 @ 0x7f9894017200] i16 v,h,dc,p: 21% 27% 12% 40%
  
  [libx264 @ 0x7f9894017200] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 24% 27% 19%  5%  4%  4%  7%  5%  6%
  
  [libx264 @ 0x7f9894017200] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 35% 22% 12%  4%  5%  5%  6%  4%  6%
  
  [libx264 @ 0x7f9894017200] i8c dc,h,v,p: 40% 28% 22% 10%
  
  [libx264 @ 0x7f9894017200] Weighted P-Frames: Y:16.4% UV:10.4%
  
  [libx264 @ 0x7f9894017200] ref P L0: 73.7% 12.2% 11.7%  2.3%  0.2%
  
  [libx264 @ 0x7f9894017200] ref B L0: 93.5%  5.8%  0.7%
  
  [libx264 @ 0x7f9894017200] ref B L1: 97.2%  2.8%
  
  [libx264 @ 0x7f9894017200] kb/s:207.25