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    12 avril 2011, par

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Sur d’autres sites (9673)

  • Can't play mp4 video using html5 video tag

    7 août 2020, par John Doe

    I am trying to present an mp4 video (h264) using html5 :

    


    <video width="320" controls="controls">&#xA;            <source src="/home/nabil/FWork/hikvision/ch01_00000100068000101.mp4" type="video/mp4">&#xA;</source></video>&#xA;

    &#xA;

    analyzing video codec with ffmpeg gives the following :

    &#xA;

    ffprobe ch01_00000100068000101.mp4 &#xA;ffprobe version 2.8.17-0ubuntu0.1 Copyright (c) 2007-2020 the FFmpeg developers&#xA;  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.12) 20160609&#xA;  configuration: --prefix=/usr --extra-version=0ubuntu0.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g&#x2B;&#x2B; --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv&#xA;  libavutil      54. 31.100 / 54. 31.100&#xA;  libavcodec     56. 60.100 / 56. 60.100&#xA;  libavformat    56. 40.101 / 56. 40.101&#xA;  libavdevice    56.  4.100 / 56.  4.100&#xA;  libavfilter     5. 40.101 /  5. 40.101&#xA;  libavresample   2.  1.  0 /  2.  1.  0&#xA;  libswscale      3.  1.101 /  3.  1.101&#xA;  libswresample   1.  2.101 /  1.  2.101&#xA;  libpostproc    53.  3.100 / 53.  3.100&#xA;Invalid UE golomb code&#xA;    Last message repeated 3 times&#xA;Input #0, mpeg, from &#x27;ch01_00000100068000101.mp4&#x27;:&#xA;  Duration: 00:09:27.33, start: 35024.106667, bitrate: 507 kb/s&#xA;    Stream #0:0[0x1e0]: Video: h264 (Baseline), yuv420p, 1280x720, 10 fps, 10 tbr, 90k tbn, 20 tbc&#xA;

    &#xA;

    a possible relevant detail is that playing the video using ubuntu's default video reader (ffmpeg in the background) doesn't show any video controls

    &#xA;

  • how to preserve transparency when scaling PNG with ffmpeg

    24 décembre 2020, par Richard

    I am using ffmpeg to scale my PNG images, and I find the transparency turns to white after scaling.&#xA;How can I preserve the transparency ? Thanks

    &#xA;

    ffmpeg -i background_image.png -vf scale=1080:1920 output.png&#xA;ffmpeg version 4.3.1-static https://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2020 the FFmpeg developers&#xA;  built with gcc 8 (Debian 8.3.0-6)&#xA;  configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp --enable-libgme --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libdav1d --enable-libxvid --enable-libzvbi --enable-libzimg&#xA;  libavutil      56. 51.100 / 56. 51.100&#xA;  libavcodec     58. 91.100 / 58. 91.100&#xA;  libavformat    58. 45.100 / 58. 45.100&#xA;  libavdevice    58. 10.100 / 58. 10.100&#xA;  libavfilter     7. 85.100 /  7. 85.100&#xA;  libswscale      5.  7.100 /  5.  7.100&#xA;  libswresample   3.  7.100 /  3.  7.100&#xA;  libpostproc    55.  7.100 / 55.  7.100&#xA;Input #0, png_pipe, from &#x27;background_image.png&#x27;:&#xA;  Duration: N/A, bitrate: N/A&#xA;    Stream #0:0: Video: png, pal8(pc), 1440x2560, 25 tbr, 25 tbn, 25 tbc&#xA;Stream mapping:&#xA;  Stream #0:0 -> #0:0 (png (native) -> png (native))&#xA;Press [q] to stop, [?] for help&#xA;Output #0, image2, to &#x27;output.png&#x27;:&#xA;  Metadata:&#xA;    encoder         : Lavf58.45.100&#xA;    Stream #0:0: Video: png, pal8, 1080x1920, q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc&#xA;    Metadata:&#xA;      encoder         : Lavc58.91.100 png&#xA;frame=    1 fps=0.0 q=-0.0 Lsize=N/A time=00:00:00.04 bitrate=N/A speed=0.113x    &#xA;video:669kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown&#xA;&#xA;

    &#xA;

    My Sample PNG file

    &#xA;

    I don't know why my PNG file with transparency is converted to a jpg format with white after uploading to stackoverflow.

    &#xA;

  • unable to steam rtsp from mp4(h264) file using ffmpeg on os x : Connection refused Could not write header for output file

    28 janvier 2023, par TalG

    im ussing the following command on my macbook os high sierra to stream rtsp from mp4 file using ffmpeg :

    &#xA;

    sudo ffmpeg -re -i ./Big_Buck_Bunny_1080_10s_1MB.mp4 -c:v libx264 -preset superfast -tune zerolatency -c:a aac -ar 44100 -f rtsp -rtsp_transport udp rtsp://127.0.0.1:8888/live&#xA;

    &#xA;

    but get the following error :

    &#xA;

    [tcp @ 0x7fb979e22ec0] Connection to tcp://127.0.0.1:1935?timeout=0 failed: Connection refused&#xA;Could not write header for output file #0 (incorrect codec parameters ?): Connection refused&#xA;Error initializing output stream 0:0 -- &#xA;Conversion failed!&#xA;

    &#xA;

    here is the whole output of the command :

    &#xA;

    ffmpeg version 4.3.1 Copyright (c) 2000-2020 the FFmpeg developers&#xA;  built with Apple LLVM version 10.0.0 (clang-1000.11.45.5)&#xA;  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.3.1 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-videotoolbox --disable-libjack --disable-indev=jack&#xA;  libavutil      56. 51.100 / 56. 51.100&#xA;  libavcodec     58. 91.100 / 58. 91.100&#xA;  libavformat    58. 45.100 / 58. 45.100&#xA;  libavdevice    58. 10.100 / 58. 10.100&#xA;  libavfilter     7. 85.100 /  7. 85.100&#xA;  libavresample   4.  0.  0 /  4.  0.  0&#xA;  libswscale      5.  7.100 /  5.  7.100&#xA;  libswresample   3.  7.100 /  3.  7.100&#xA;  libpostproc    55.  7.100 / 55.  7.100&#xA;Input #0, mov,mp4,m4a,3gp,3g2,mj2, from &#x27;./Big_Buck_Bunny_1080_10s_1MB.mp4&#x27;:&#xA;  Metadata:&#xA;    major_brand     : isom&#xA;    minor_version   : 512&#xA;    compatible_brands: isomiso2avc1mp41&#xA;    title           : Big Buck Bunny, Sunflower version&#xA;    artist          : Blender Foundation 2008, Janus Bager Kristensen 2013&#xA;    composer        : Sacha Goedegebure&#xA;    encoder         : Lavf57.63.100&#xA;    comment         : Creative Commons Attribution 3.0 - http://bbb3d.renderfarming.net&#xA;    genre           : Animation&#xA;  Duration: 00:00:10.00, start: 0.000000, bitrate: 815 kb/s&#xA;    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 812 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)&#xA;    Metadata:&#xA;      handler_name    : VideoHandler&#xA;Stream mapping:&#xA;  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))&#xA;Press [q] to stop, [?] for help&#xA;[libx264 @ 0x7fb97a00de00] using SAR=1/1&#xA;[libx264 @ 0x7fb97a00de00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2&#xA;[libx264 @ 0x7fb97a00de00] profile High, level 4.0, 4:2:0, 8-bit&#xA;[libx264 @ 0x7fb97a00de00] 264 - core 160 r3011 cde9a93 - H.264/MPEG-4 AVC codec - Copyleft 2003-2020 - http://www.videolan.org/x264.html - options: cabac=1 ref=1 deblock=1:0:0 analyse=0x3:0x3 me=dia subme=1 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=12 lookahead_threads=12 sliced_threads=1 slices=12 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=1 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc=crf mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00&#xA;[tcp @ 0x7fb979e22ec0] Connection to tcp://127.0.0.1:1935?timeout=0 failed: Connection refused&#xA;Could not write header for output file #0 (incorrect codec parameters ?): Connection refused&#xA;Error initializing output stream 0:0 -- &#xA;Conversion failed!&#xA;

    &#xA;

    tried with and without sudo, tried changing rtsp ://... to http://&#xA;also tried udp but get same output..

    &#xA;

    chacked that the port is not in use(8888) and different ports (1935...) but still the same.

    &#xA;

    i installed ffmpeg via brew install...

    &#xA;

    when i run some test server on my localhost i never have issues ussing an unused port

    &#xA;

    really stuck here and any help would be amazing...thank you

    &#xA;

    EDIT :&#xA;Problem was in the command i used : "rtsp ://127.0.0.1:8888/live" - but i did not have a running server capable of accepting the data from ffmpeg and redestributing it - so i had to first run such server and only after that to run ffmpeg :

    &#xA;

    Servers which can receive from FFmpeg (to restream to multiple clients) include ffserver (linux only, though with cygwin it might work on windows), or ​Wowza Media Server, or ​Flash Media Server, Red5, or ​various others. Even ​VLC can pick up the stream from ffmpeg, then redistribute it, acting as a server.

    &#xA;

    i used the VLC option. You can read about it here : http://trac.ffmpeg.org/wiki/StreamingGuide

    &#xA;