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• ffmpeg Live Input MP4 Error [migrated]

  3 mars 2013, par Brianjs

  Currently I have a mic and a webcam connected to my computer. I am running ffmpeg on CentOS 6.3.

  When I try to record a video without audio by :

  ffmpeg -y -f video4linux2 -t 15 -s 640x480 -r 25 -i /dev/video0 /home/irdb/Desktop/out2.mp4

  it runs perfectly and I get a nice video. However when I try to run with audio included by :

  ffmpeg -y -f video4linux2 -t 15 -s 640x480 -r 25 -i /dev/video0 -f alsa -ar 22050 -ab 64k -ac 2 -i default /home/irdb/Desktop/out2.mp4

  It errors out and prints :

  [NULL @ 0x1e33fc0] Codec is experimental but experimental codecs are not enabled,      see -strict -2
  
  Output #0, mp4, to '/home/irdb/Desktop/out2.mp4':
  
  Stream #0:0: Video: h264, yuv420p, 640x480, q=-1--1, 90k tbn, 25 tbc
  
  Stream #0:1: Audio: none, 22050 Hz, 2 channels, flt, 128 kb/s
  
  Stream mapping:
  
  Stream #0:0 -> #0:0 (rawvideo -> libx264)
  
  Stream #1:0 -> #0:1 (pcm_s16le -> aac)
  
  Error while opening encoder for output stream #0:1 - maybe incorrect parameters such    as bit_rate, rate, width or height

  I assume this has to do with the first error as when I use something like mpg it works just fine. However I plan on streaming this live and want mp4 format as that is pretty much supported by all browsers (Firefox with flash fallback).

  Does anyone know how to get the audio to work without additional processing (as I want to stream live and not write to a file eventually).

• Overlay image in ts file

  12 juin 2015, par good-engineer

  I’m using the FFmpeg library in Android.

  I’m able to generate a .ts file which i can play later using VLC player. But now i want my app to overlay a .png image over the whole video.

  The .ts file i want to overlay an image in is called "out.ts". The name might seem confusing, but it is called that way because it is the output of my camera.

  This is the line i’m using :

  ffmpeg -i /storage/emulated/0/out.ts -i /storage/emulated/0/mustache.png -filter_complex "overlay=10:10" /storage/emulated/0/newout.ts

  This is the output i’m receiving :

      ffmpeg version n2.4.2 Copyright (c) 2000-2014 the FFmpeg developers
  
  built on Oct  7 2014 15:08:46 with gcc 4.8 (GCC)
  
  configuration: --target-os=linux --cross-prefix=/home/sb/Source-Code/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/sb/Source-Code/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/sb/Source-Code/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/sb/Source-Code/ffmpeg-android/build/armeabi-v7a-neon --extra-cflags='-I/home/sb/Source-Code/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all -mfpu=neon' --extra-ldflags='-L/home/sb/Source-Code/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
  
  libavutil      54.  7.100 / 54.  7.100
  
  libavcodec     56.  1.100 / 56.  1.100
  
  libavformat    56.  4.101 / 56.  4.101
  
  libavdevice    56.  0.100 / 56.  0.100
  
  libavfilter     5.  1.100 /  5.  1.100
  
  libswscale      3.  0.100 /  3.  0.100
  
  libswresample   1.  1.100 /  1.  1.100
  
  libpostproc    53.  0.100 / 53.  0.100
  
  Input #0, mpegts, from '/storage/emulated/0/out.ts':
  
  Duration: 00:00:02.79, start: 0.000000, bitrate: 1118 kb/s
  
  Program 1
  
  Stream #0:0[0x1e1]: Video: h264 (Constrained Baseline) ([27][0][0][0] / 0x001B), yuv420p, 640x480, 32 tbr, 90k tbn, 180k tbc
  
  Input #1, png_pipe, from '/storage/emulated/0/mustache.png':
  
  Duration: N/A, bitrate: N/A
  
  Stream #1:0: Video: png, ya8, 1848x580 [SAR 2835:2835 DAR 462:145], 25 tbr, 25 tbn, 25 tbc
  
  [AVFilterGraph @ 0x2b411ec0] No such filter: '"overlay'
  
  Error configuring filters.

  Some explaination on how to tell ffmpeg where to position the .png image would be appreciated.

• ffmpeg make thumbnail and compress in one command

  9 juin 2021, par chris227

  I want to compress a video and make thumbnail on same command but it's not working. It makes compression, it creates the log file but not the thumbnail, here is my php command :

  


   $command = "/usr/bin/ffmpeg -i $targetFilePathPrefix -b:v 700k -bufsize 700k /home/etwow8083/public_html/worldconnect.me/community/uploads/$idUser/$fileNameConvert -ss 00:00:01.000 -vframes 1 $thumbnail 1> /home/etwow8083/public_html/worldconnect.me/community/uploads/$idUser/$fileOutput 2>&1 &";
exec($command);