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Sur d’autres sites (16625)

  • Combine MPEG-DASH segments (ex, init.mp4 + segments.m4s) back to a full source.mp4 ?

    20 octobre 2016, par Drake

    GPAC, http://gpac.wp.mines-telecom.fr/, can be used to do video segmentation along with MPEG-DASH spec. One type of results is a combination of init files (ex, init.mp4) and several roughly fixed-duration segments (ex, segment-%d.m4s). What if I just got those results and I like to reverse/combine them back to one full source.mp4 file ? Can I use GPAC or ffmpeg for this ?

  • Combine MPEG-DASH segments (ex, init.mp4 + segments.m4s) back to a full source.mp4 ?

    11 juin 2020, par Drake Guan

    GPAC, http://gpac.wp.mines-telecom.fr/, can be used to do video segmentation along with MPEG-DASH spec. One type of results is a combination of init files (ex, init.mp4) and several roughly fixed-duration segments (ex, segment-%d.m4s). What if I just got those results and I like to reverse/combine them back to one full source.mp4 file ? Can I use GPAC or ffmpeg for this ?

    


  • 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;

    &#xA;

    &#xA;

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

    &#xA;

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