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• ffmpeg : check videos conformance for dash before concat

  26 janvier 2018, par Massimo Vantaggio

  I wrote a small bash file that reads a folder, generates a playlist, concatenates, adds a logo and encode the big video result for dash ready, i would like to implement it by checking before all videos conformance : if they have same fps, same resolution, same time base etc.
  Below my situation :

  #!/bin/bash
  
  # CONCAT DEMUXER
  
  #This demuxer reads a list of #files and other directives from a text file and demuxes them one after the other, as if #all their packets had been muxed together. All files must have the same streams (same #codecs, same time base, etc.) but can be wrapped in different container formats.
  
  
  
  
  
  
  
  printf "file '%s'\n" *.mp4 > playlist.txt
  
  ffmpeg -auto_convert 1 -f concat -safe 0 -i playlist.txt -c:a aac -b:a 384k -ar 48000 -ac 2 -async 1 -vsync 1 -c:v libx264 -x264opts 'keyint=50:min-keyint=50:no-scenecut' -r 25 -b:v 2400k -maxrate 2400k -bufsize 1200k -vf "scale=-1:432" -vf "movie=stable.png [watermark]; [in][watermark] overlay=main_w-overlay_w-10:10 [out]" out.mp4
  
  clear
  
  echo “VIDEO CONCAT COMPLETED”

  For example below i find this bash that calculate the total duration in second of the videos of the folder, unfortunately I’m unable to put the result into variable.. I’m newbie of bash.

  times=()
  
  for f in *.ts; do
  
      _t=$(ffmpeg -i "$f" 2>&1 | grep "Duration" | grep -o " [0-9:.]*, " | head -n1 | tr ',' ' ' | awk -F: '{ print ($1 * 3600) + ($2 * 60) + $3 }')
  
      times+=("$_t")
  
  done
  
  echo "${times[@]}" | sed 's/ /+/g' | bc

  I wish to check if the videos have the same fps, and same resolution before process, and to get into variable this duration.
  Thanks
  Massimo

• Microsoft Edge fails to play PlayReady DASH stream in VideoJS

  18 septembre 2023, par poepykooitje

  I have encoded some videos to x264 with ffmpeg, and packaged it to mpeg-dash with Widevine + PlayReady DRM using Shaka Packager.
With VideoJS the Widevine stream plays perfectly on both Chrome and MS Edge.
However, when I try to play the PlayReady stream on Edge, it just plays the first few seconds and then the image freezes. The audio does continue.
I see this error in the console :
VIDEOJS : ERROR : DOMException : Failed to execute 'changeType' on 'SourceBuffer' : Changing to the type provided ('video/mp4 ;codecs="avc1.4d401f"') is not supported.

  


  What I don't understand is why it says the codec is unsupported, when it plays the exact same video fine, using Widevine. The PlayReady license server also doesn't give an error at all, it's all 200 OK.

  


  The PlayReady stream works fine on other PlayReady supporting devices like a Roku or a Chromecast.

  


  Does anyone have any idea about what the problem could be here ?

  


  Thanks in advance !

  


  EDIT : It seems to be a VideoJS error, since the exact same PlayReady stream plays fine in a DRM test player (https://bitmovin.com/demos/drm). That still doesn't solve my issue though...

  


• Dash output with ffmpeg not producing durations specified with -seg_duration

  30 juillet 2022, par Codie

  There is a .mp4 file of 35 MB and 51 seconds. I have to create 51 chunks, each corresponding to 1 second with a size of less than 1MB (the total size should be almost the same as the original file). Please note that I have to implement lossless converting.

  


  I've tried many times, but it just produces about 10 files above 10 MB.

  


  ---

  


  Command :

  


  ffmpeg -re -i input.mp4 -map 0:v -c:v libx264 -crf 0 -bf 1 -keyint_min 120 -g 120 -sc_threshold 0 -b_strategy 0 -use_template 1 -seg_duration 1 -window_size 60 -adaptation_sets "id=0,streams=v id=1,streams=a" -f dash ./dashTest/out.mpd


  


  ---

  


  Command line log :

  


  ffmpeg version 5.1-full_build-www.gyan.dev Copyright (c) 2000-2022 the FFmpeg developers
  built with gcc 12.1.0 (Rev2, Built by MSYS2 project)
  configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libdavs2 --enable-libuavs3d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-liblensfun --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
  libavutil      57. 28.100 / 57. 28.100
  libavcodec     59. 37.100 / 59. 37.100
  libavformat    59. 27.100 / 59. 27.100
  libavdevice    59.  7.100 / 59.  7.100
  libavfilter     8. 44.100 /  8. 44.100
  libswscale      6.  7.100 /  6.  7.100
  libswresample   4.  7.100 /  4.  7.100
  libpostproc    56.  6.100 / 56.  6.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: mp42mp41
    creation_time   : 2022-07-27T09:13:31.000000Z
  Duration: 00:00:50.03, start: 0.000000, bitrate: 5716 kb/s
  Stream #0:0[0x1](eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], 5396 kb/s, 25 fps, 25 tbr, 25k tbn (default)
    Metadata:
      creation_time   : 2022-07-27T09:13:31.000000Z
      handler_name    : ?Mainconcept Video Media Handler
      vendor_id       : [0][0][0][0]
      encoder         : AVC Coding
  Stream #0:1[0x2](eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 317 kb/s (default)
    Metadata:
      creation_time   : 2022-07-27T09:13:31.000000Z
      handler_name    : #Mainconcept MP4 Sound Media Handler
      vendor_id       : [0][0][0][0]
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 000001d13acb0380] using SAR=1/1
[libx264 @ 000001d13acb0380] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
[libx264 @ 000001d13acb0380] profile High 4:4:4 Predictive, level 3.1, 4:2:0, 8-bit
[libx264 @ 000001d13acb0380] 264 - core 164 r3095 baee400 - H.264/MPEG-4 AVC codec - Copyleft 2003-2022 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=0 mixed_ref=1 me_range=16 chroma_me=1 trellis=0 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=0 chroma_qp_offset=0 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=2 keyint=120 keyint_min=61 scenecut=0 intra_refresh=0 rc=cqp mbtree=0 qp=0
[dash @ 000001d13a2a4680] No bit rate set for stream 0
[dash @ 000001d13a2a4680] Opening './dashTest/init-stream0.m4s' for writing
Output #0, dash, to './dashTest/out.mpd':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: mp42mp41
    encoder         : Lavf59.27.100
  Stream #0:0(eng): Video: h264, yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 25 fps, 12800 tbn (default)
    Metadata:
      creation_time   : 2022-07-27T09:13:31.000000Z
      handler_name    : ?Mainconcept Video Media Handler
      vendor_id       : [0][0][0][0]
      encoder         : Lavc59.37.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
[dash @ 000001d13a2a4680] Opening './dashTest/chunk-stream0-00001.m4s.tmp' for writing
[dash @ 000001d13a2a4680] Opening './dashTest/out.mpd.tmp' for writing0.849x
[dash @ 000001d13a2a4680] Opening './dashTest/chunk-stream0-00002.m4s.tmp' for writing
[dash @ 000001d13a2a4680] Opening './dashTest/out.mpd.tmp' for writing0.918x
[dash @ 000001d13a2a4680] Opening './dashTest/chunk-stream0-00003.m4s.tmp' for writing
[dash @ 000001d13a2a4680] Opening './dashTest/out.mpd.tmp' for writing0.942x
[dash @ 000001d13a2a4680] Opening './dashTest/chunk-stream0-00004.m4s.tmp' for writing
[dash @ 000001d13a2a4680] Opening './dashTest/out.mpd.tmp' for writing0.957x
[dash @ 000001d13a2a4680] Opening './dashTest/chunk-stream0-00005.m4s.tmp' for writing
[dash @ 000001d13a2a4680] Opening './dashTest/out.mpd.tmp' for writing0.964x
[dash @ 000001d13a2a4680] Opening './dashTest/chunk-stream0-00006.m4s.tmp' for writing
[dash @ 000001d13a2a4680] Opening './dashTest/out.mpd.tmp' for writing0.971x
[dash @ 000001d13a2a4680] Opening './dashTest/chunk-stream0-00007.m4s.tmp' for writing
[dash @ 000001d13a2a4680] Opening './dashTest/out.mpd.tmp' for writing0.975x
[dash @ 000001d13a2a4680] Opening './dashTest/chunk-stream0-00008.m4s.tmp' for writing
[dash @ 000001d13a2a4680] Opening './dashTest/out.mpd.tmp' for writing0.978x
[dash @ 000001d13a2a4680] Opening './dashTest/chunk-stream0-00009.m4s.tmp' for writing
[dash @ 000001d13a2a4680] Opening './dashTest/out.mpd.tmp' for writing0.981x
[dash @ 000001d13a2a4680] Opening './dashTest/chunk-stream0-00010.m4s.tmp' for writing
[dash @ 000001d13a2a4680] Opening './dashTest/out.mpd.tmp' for writing0.982x
[dash @ 000001d13a2a4680] Opening './dashTest/chunk-stream0-00011.m4s.tmp' for writing
[dash @ 000001d13a2a4680] Opening './dashTest/out.mpd.tmp' for writing0.983x
frame= 1250 fps= 25 q=-1.0 Lsize=N/A time=00:00:49.96 bitrate=N/A speed=0.992x
video:171641kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
[libx264 @ 000001d13acb0380] frame I:11    Avg QP: 0.00  size:255122
[libx264 @ 000001d13acb0380] frame P:1239  Avg QP: 0.00  size:139591
[libx264 @ 000001d13acb0380] mb I  I16..4: 52.8%  8.8% 38.4%
[libx264 @ 000001d13acb0380] mb P  I16..4:  3.9%  0.7%  1.3%  P16..4: 28.0% 13.9% 11.3%  0.0%  0.0%    skip:40.8%
[libx264 @ 000001d13acb0380] 8x8 transform intra:11.9% inter:33.4%
[libx264 @ 000001d13acb0380] coded y,uvDC,uvAC intra: 68.6% 80.1% 78.9% inter: 38.0% 47.1% 46.5%
[libx264 @ 000001d13acb0380] i16 v,h,dc,p: 65% 28%  5%  2%
[libx264 @ 000001d13acb0380] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 33% 33% 28%  2%  1%  1%  1%  1%  1%
[libx264 @ 000001d13acb0380] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 36% 36%  7%  3%  5%  3%  4%  3%  2%
[libx264 @ 000001d13acb0380] i8c dc,h,v,p: 17% 38% 44%  1%
[libx264 @ 000001d13acb0380] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 000001d13acb0380] ref P L0: 86.4%  7.6%  4.6%  1.4%
[libx264 @ 000001d13acb0380] kb/s:28121.58


  


  ---

  


  .mpd file :

  


  &lt;?xml version="1.0" encoding="utf-8"?>&#xA;<mpd xmlns="urn:mpeg:dash:schema:mpd:2011" profiles="urn:mpeg:dash:profile:isoff-live:2011" type="static" mediapresentationduration="PT50.0S" maxsegmentduration="PT1.0S" minbuffertime="PT9.6S">&#xA;    <programinformation>&#xA;    </programinformation>&#xA;    <servicedescription>&#xA;    </servicedescription>&#xA;    <period start="PT0.0S">&#xA;        <adaptationset contenttype="video" startwithsap="1" segmentalignment="true" bitstreamswitching="true" framerate="25/1" maxwidth="1280" maxheight="720" par="16:9" lang="eng">&#xA;            <representation mimetype="video/mp4" codecs="avc1.f4001f" bandwidth="28122926" width="1280" height="720" sar="1:1">&#xA;                <segmenttemplate timescale="12800" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startnumber="1">&#xA;                    <segmenttimeline>&#xA;                        <s t="0" d="61440" r="9"></s>&#xA;                        <s d="25600"></s>&#xA;                    </segmenttimeline>&#xA;                </segmenttemplate>&#xA;            </representation>&#xA;        </adaptationset>&#xA;        <adaptationset contenttype="audio" startwithsap="1" segmentalignment="true" bitstreamswitching="true">&#xA;        </adaptationset>&#xA;    </period>&#xA;</mpd>&#xA;

  


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  Please, if you want to put a negative point, mention your reason in the comments !

  


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