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• Using FFMPEG video convert, not play audio

  7 avril 2017, par Tarun Bhardwaj

  I am using this command its works fine, but remove audio of video file

  ffmpeg -i background.jpg -i man-1.mp4 -filter_complex [1:v]chromakey=0x3BBD1E:0.1:0.2[ckout];[0:v][ckout]overlay[out] -map [out] box3.mp4

• How to play HDR10 videos using ffplay and ffmpeg ?

  6 janvier 2023, par befandy

  I'm trying to play on Windows a HDR10 video. My display support 10 bits HDR content.
The command that I'm using to play the HDR10 video is the following.
ffplay -sws_flags print_info -i video.mp4

  


  But the output looks washed out.

  


  the log are the following :

  


  ffplay version 2022-03-28-git-5ee198f9aa-full_build-www.gyan.dev Copyright (c) 2003-2022 the FFmpeg developers built with gcc 11.2.0 (Rev7, 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-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. 24.101 / 57. 24.101 libavcodec     59. 25.100 / 59. 25.100 libavformat    59. 20.101 / 59. 20.101 libavdevice    59.  6.100 / 59.  6.100 libavfilter     8. 29.100 /  8. 29.100 libswscale      6.  6.100 /  6.  6.100 libswresample   4.  6.100 /  4.  6.100 libpostproc    56.  5.100 / 56.  5.100 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video.mp4':=0/0 Metadata: major_brand     : isom minor_version   : 512 compatible_brands: isomiso2mp41 encoder         : Lavf58.29.100 Duration: 00:00:08.78, start: 0.000000, bitrate: 159424 kb/s Stream #0:0[0x1](und): Video: hevc (Main 10) (hev1 / 0x31766568), yuv420p10le(tv, bt2020nc/bt2020/smpte2084, progressive), 3840x2160 [SAR 1:1 DAR 16:9], 159427 kb/s, 60 fps, 60 tbr, 15360 tbn (default) Metadata: handler_name    : VideoHandler vendor_id       : [0][0][0][0] [swscaler @ 000001d62a81d000] [swscaler @ 000001d622aebf80] bicubic scaler, from yuv420p10le to yuv420p using MMXEXT [swscaler @ 000001d62a81d000] [swscaler @ 000001d622aebf80] using unscaled yuv420p10le -> yuv420p special converter [swscaler @ 000001d62a81d000] [swscaler @ 000001d635638600] bicubic scaler, from yuv420p10le to yuv420p using MMXEXT [swscaler @ 000001d62a81d000] [swscaler @ 000001d635638600] using unscaled yuv420p10le -> yuv420p special converter [swscaler @ 000001d62a81d000] [swscaler @ 000001d635661d80] bicubic scaler, from yuv420p10le to yuv420p using MMXEXT [swscaler @ 000001d62a81d000] [swscaler @ 000001d635661d80] using unscaled yuv420p10le -> yuv420p special converter [swscaler @ 000001d62a81d000] [swscaler @ 000001d63567df80] bicubic scaler, from yuv420p10le to yuv420p using MMXEXT [swscaler @ 000001d62a81d000] [swscaler @ 000001d63567df80] using unscaled yuv420p10le -> yuv420p special converter [swscaler @ 000001d62a81d000] [swscaler @ 000001d6356bbf80] bicubic scaler, from yuv420p10le to yuv420p using MMXEXT 3.44 M-V:  0.204 fd=  91 aq=    0KB vq=15552KB sq=    0B f=0/0

  


  With the help of '-sws_flags print_info' flag we can see that there is a downscaling happening from 10 bits to 8 bits "yuv420p10le -> yuv420p"

  


  I have try to play the video using VLC and it is working fine on my display : colour are vivid and display bright.

  


  I have also try to decode first the video and then past metadata directly to ffplay as follow.
Decoding to yuv format with : ffmpeg -i video.mp4 video.yuv
Then play yuv file : ffplay -framerate 60 -video_size 3840x2160 -pixel_format yuv420p10le -color_range tv -color_trc smpte2084 -color_primaries bt2020 -colorspace bt2020nc -i video.yuv

  


  But the result is the same washed out color and "yuv420p10le -> yuv420p" conversion

  


  Is there a way to play a HDR video (encoded or decoded stream) with ffplay ?

  


• My (FFMPEG issue ) RTMP server(freebsd) wont let me hear video when I play a huge file over the server itself :/

  19 avril 2021, par Engi Gang

  Hey my name is Alisha from Norway im trying to get my RTMP server working the thing is that it works just fine but I just cant stream over it with ffmpeg I can stream to it on OBS and it works fine, but I am trying to a website where people could watch old public domain movies from the 1950 some of the films are actually pretty big lol.... anyways I detailed bellow more

  


  rm -rf /mnt/hls/loool && ffmpeg -re -i "$file" -c:v libx264 -c:a aac -b:v 300k -b:a 95k -f flv -flvflags no_duration_filesize rtmp ://lambright.xyz:1935/live/loool

  


  any work around I literally cant play the audio :( I can only hear (my source file is an MKV and 3gb )

  


  Note I had a smaller mp4 file and it did played the audio, the video isnt even playable in chrome but on VLC it is, but only a small file worked fine... its fine when I stream from my pc, but whats the point I am trying to set up my vintage 1950 serverbox :') trying to build a nice website where users could watch neat and decent old movies that are public domain if you wonder :/

  


  Another note when I am trying to play it on my iphone safari browser it does actually play parts but audio is super corrupted like you hear the audio sometimes :((

  


  rtmp {
    server {
        listen 1935; # Listen on standard RTMP port
        chunk_size 4000;

        application live {
            allow play all;
            live on;
            record off;
            hls on;
            hls_nested on;
            hls_path /mnt/hls/;
            hls_fragment 2s;
        }
        
    }
}