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• Trying to concat 2 videos using FFMPEG in Android command line

  23 mars 2016, par Hero Roma

  I am trying to add a cross fade transitions between 2 videos in my Android application. I have used the Guardian Project to build the ffmpeg library locally. Guardian Project. I was able to do that.
  Now I am trying to implement the cross fade using the StackOverflow answer
  The code is basically something like
  ArrayList cmd = new ArrayList() ;

      cmd.add(mFfmpegBin);
  
      cmd.add("-i");
  
      cmd.add(firstFile);
  
      cmd.add("-i");
  
      cmd.add(secondFile);
  
      cmd.add("-f");
  
      cmd.add("lavfi");
  
      cmd.add("-i");
  
      cmd.add("color=black");
  
      cmd.add("-filter_complex");
  
      cmd.add("[0:v]format=pix_fmts=yuva420p,fade=t=out:st=4:d=1:alpha=1,setpts=PTS-STARTPTS[va0];[1:v]format=pix_fmts=yuva420p,fade=t=in:st=0:d=1:alpha=1,setpts=PTS-STARTPTS+4/TB[va1];[2:v]scale=960x720,trim=duration=9[over];[over][va0]overlay[over1];[over1][va1]overlay=format=yuv420[outv]");
  
      cmd.add("-vcodec");
  
      cmd.add("libx264");
  
      cmd.add("-map");
  
      cmd.add("[outv]");
  
      cmd.add(outputFile);
  
      execFFMPEG(cmd, sc);

  The error I keep getting is

  Invalid pixel format ’pix_fmts=yuva420p’

  I feel I either the command is incorrect for command line usage or I am not providing the correct filters.

  fc>/data/data/com.User.testapplication/app_bin/ffmpeg -i /storage/emulated/0/Pictures/DayVideos/FIRST_VIDEO.mp4 -i /storage/emulated/0/Pictures/DayVideos/SECOND_VIDEO.mp4 -f lavfi -i color=black -filter_complex [0:v]format=pix_fmts=yuva420p,fade=t=out:st=4:d=1:alpha=1,setpts=PTS-STARTPTS[va0];[1:v]format=pix_fmts=yuva420p,fade=t=in:st=0:d=1:alpha=1,setpts=PTS-STARTPTS+4/TB[va1];[2:v]scale=960x720,trim=duration=9[over];[over][va0]overlay[over1];[over1][va1]overlay=format=yuv420[outv] -vcodec libx264 -map [outv] /storage/emulated/0/Pictures/DayVideos/output.mp4 
  
  fc>WARNING: linker: /data/data/com.User.testapplication/app_bin/ffmpeg has text relocations. This is wasting memory and prevents security hardening. Please fix.
  
  fc>ffmpeg version 0.11.1 Copyright (c) 2000-2012 the FFmpeg developers
  
  fc>  built on Mar 23 2016 12:12:02 with gcc 4.6 20120106 (prerelease)
  
  fc>  configuration: --arch=arm --cpu=cortex-a8 --target-os=linux --enable-runtime-cpudetect --prefix=/data/data/info.guardianproject.ffmpeg/app_opt --enable-pic --disable-shared --enable-static --cross-prefix=/home/test/Downloads/android-ndk-r8e/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/arm-linux-androideabi- --sysroot=/home/test/Downloads/android-ndk-r8e/platforms/android-14/arch-arm --extra-cflags='-I../x264 -mfloat-abi=softfp -mfpu=neon -fPIE -pie' --extra-ldflags='-L../x264 -fPIE -pie' --enable-version3 --enable-gpl --disable-doc --enable-yasm --enable-decoders --enable-encoders --enable-muxers --enable-demuxers --enable-parsers --enable-protocols --enable-filters --enable-avresample --disable-indevs --enable-indev=lavfi --disable-outdevs --enable-hwaccels --enable-ffmpeg --disable-ffplay --disable-ffprobe --disable-ffserver --disable-network --enable-libx264 --enable-zlib --enable-muxer=md5
  
  fc>  libavutil      51. 54.100 / 51. 54.100
  
  fc>  libavcodec     54. 23.100 / 54. 23.100
  
  fc>  libavformat    54.  6.100 / 54.  6.100
  
  fc>  libavdevice    54.  0.100 / 54.  0.100
  
  fc>  libavfilter     2. 77.100 /  2. 77.100
  
  fc>  libswscale      2.  1.100 /  2.  1.100
  
  fc>  libswresample   0. 15.100 /  0. 15.100
  
  fc>  libpostproc    52.  0.100 / 52.  0.100
  
  fc>Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Pictures/DayVideos/FIRST_VIDEO.mp4':
  
  fc>  Metadata:
  
  fc>    major_brand     : isom
  
  fc>    minor_version   : 0
  
  fc>    compatible_brands: isomiso2avc1
  
  fc>    creation_time   : 2016-03-22 19:07:16
  
  fc>  Duration: 00:00:19.35, start: 0.000000, bitrate: 5253 kb/s
  
  fc>    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720, 5252 kb/s, SAR 65536:65536 DAR 16:9, 30.02 fps, 30 tbr, 90k tbn, 180k tbc
  
  fc>    Metadata:
  
  fc>      creation_time   : 2016-03-22 19:07:02
  
  fc>Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Pictures/DayVideos/SECOND_VIDEO.mp4':
  
  fc>  Metadata:
  
  fc>    major_brand     : mp42
  
  fc>    minor_version   : 0
  
  fc>    compatible_brands: isommp42
  
  fc>    creation_time   : 2016-03-22 19:07:55
  
  fc>  Duration: 00:00:17.32, start: 0.000000, bitrate: 5414 kb/s
  
  fc>    Stream #1:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720, 5227 kb/s, SAR 65536:65536 DAR 16:9, 30.02 fps, 30.02 tbr, 90k tbn, 180k tbc
  
  fc>    Metadata:
  
  fc>      creation_time   : 2016-03-22 19:07:55
  
  fc>      handler_name    : VideoHandle
  
  fc>[color @ 0xb8901360] w:320 h:240 r:25/1 color:0x000000ff
  
  fc>[lavfi @ 0xb88fbb60] Estimating duration from bitrate, this may be inaccurate
  
  fc>Input #2, lavfi, from 'color=black':
  
  fc>  Duration: N/A, start: 0.000000, bitrate: N/A
  
  fc>    Stream #2:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 320x240 [SAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
  
  fc>[format @ 0xb8901190] Invalid pixel format 'pix_fmts=yuva420p'
  
  fc>Error initializing filter 'format' with args 'pix_fmts=yuva420p'
  
  fc>Error configuring filters.

  Thanks !

• Merge commit '1329c08ad6d2ddb304858f2972c67b508e8b0f0e'

  11 novembre 2017, par James Almer

  Merge commit '1329c08ad6d2ddb304858f2972c67b508e8b0f0e'
  * commit '1329c08ad6d2ddb304858f2972c67b508e8b0f0e' :
  
    hevc : Validate the number of long term reference pictures
  See ea38e5a6b75706477898eb1e6582d667dbb9946c
  Merged-by : James Almer <jamrial@gmail.com>
  

  • [DH] libavcodec/hevc_ps.c

• mpegts proxy allowing multiple concurrent views of same source feed

  5 juillet 2018, par Yass T

  I am having trouble finding a (preferably non-commercial) linux compatible project that would allow to "restream" one particular MPEGTS live source feed to multiple clients, without requesting it more than once from the source.

  Imagine an mpegts live source feed coming from http://my_mpegts_provider (imagine we have the direct link, no m3u style playlist), I would like a program to be able to grab that source and proxy it to one AND more client devices (let’s say VLC players) when they are requesting it, even if not requested at the same time.

  In other words, can we proxy the MPEGTS stream so only our proxy will be seen as the "client" (from the source provider point of view) when multiple devices (on the same network) connect to the SAME source on this side ?

  I tried the node-ffmpeg-mpegts-proxy but it clearly showed two separate connections to the source when asking for the same "channel" with two different VLC clients (confirmed with netstat).

  Thanks, and sorry in advance if my post is out of stackoverflow rules, I can’t think of a better place to gather some good opinions