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• Bash Shell Script Remote Background Processing

  22 mai 2015, par user281738

  I Have Created a Bash Shell script.. With that i can crop and convert video locally..

  nohup ffmpeg -i "$c1" -vf "$crop_value1" -b 1800k "/home/Cropped/""$name1"_cropped.mp4"" > crop1.txt &
  
  PID1=$!
  
  nohup ffmpeg -i "$c2" -vf "$crop_value2" -b 1800k "/home/Cropped/""$name2"_cropped.mp4"" > crop2.txt &
  
  PID2=$!
  
  nohup ffmpeg -i "$c3" -vf "$crop_value3" -b 1800k "/home/Cropped/""$name3"_cropped.mp4"" > crop3.txt &
  
  PID3=$!
  
  nohup ffmpeg -i "$c4" -vf "$crop_value4" -b 1800k "/home/Cropped/""$name4"_cropped.mp4"" > crop4.txt &
  
  PID4=$!
  
  wait $PID1
  
  wait $PID2
  
  wait $PID3
  
  wait $PID4

  As Above Code Shows Im Using 4 Conversion In background In Local Server And I’m Using Wait PID To Check Whether Conversation Finished Or Not.

  My Problem Is Its taking very late to Convert.. So I Thinking Of Converting One Conversion In Local Sever And Another Three In Different Remote Server Through SSH
  Example :

  ssh user@192.168.1.1 "nohup ffmpeg -i "$c1" -vf "$crop_value1" -b 1800k "/home/Cropped/""$name1"_cropped.mp4"" > crop1.txt &"

  My Problem Is After Executing Remote Commands How Can I Get Remote PID And Use PID Wait Option For All Remote Connection.

• ffmpeg fails to read header of audio while creating video at 1080p@24fps

  15 juillet 2016, par asad

  I am trying to create video by merging rawvideo frames from opengl, .m4a audio file and .png image(logo). With videos of small duration (2-3 min) at 108p@24fps, following code works fine. But if the video is larger (10 min), code fails. FFmpeg gives following error log :

  ffmpeg version N-80097-g89e9393 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-4)
  
    configuration: --prefix=/home/ec2-user/ffmpeg_build --extra-cflags=-I/home/ec2-user/ffmpeg_build/include --extra-ldflags=-L/home/ec2-user/ffmpeg_build/lib --bindir=/home/ec2-user/bin --pkg-config-flags=--static --enable-gpl --enable-nonfree --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265
  
    libavutil      55. 24.100 / 55. 24.100
  
    libavcodec     57. 43.100 / 57. 43.100
  
    libavformat    57. 37.100 / 57. 37.100
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 46.100 /  6. 46.100
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Input #0, rawvideo, from 'pipe:0':
  
    Duration: N/A, start: 0.000000, bitrate: 314818 kb/s
  
      Stream #0:0: Video: rawvideo (BGRA / 0x41524742), bgra, 854x480, 314818 kb/s, 24 tbr, 24 tbn
  
  Input #1, png_pipe, from '/home/ec2-user/logo-watermark-green_tpd.png':
  
    Duration: N/A, bitrate: N/A
  
      Stream #1:0: Video: png, rgba(pc), 287x185, 25 tbr, 25 tbn
  
  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x3b71d00] error reading header
  
  /home/ec2-user/decryptedData/audios/Blrt_Decrypt_tfss-29882287-c1d5-4c54-b674-87e9de4a9e38-audio.m4a: Invalid data found when processing input
  
  "rjRoYZaDA1_854x480@24fps_1468547071.txt"

  Code i am using is following :

  /home/ec2-user/bin/ffmpeg \
  
  -framerate 24 -f rawvideo -pixel_format rgb32 -video_size 854x480 -i pipe:0 \
  
  -i /home/ec2-user/logo-watermark-green_tpd.png \
  
  -i /home/ec2-user/decryptedData/audios/Blrt_Decrypt_tfss-29882287-c1d5-4c54-b674-87e9de4a9e38-audio.m4a \
  
  -filter_complex "[0:v]vflip[main];[1:v]scale=854/10:-1[si], \
  
  [main][si]overlay=main_w-overlay_w:main_h-overlay_h:format=rgb,format=yuv420p" \
  
  -c:v libx264 \
  
  -c:a copy /home/ec2-user/videos/rjRoYZaDA1_854x480@24fps_1468563244030.mp4 \
  
  2> /home/ec2-user/logs/rjRoYZaDA1_854x480@24fps_1468563244.txt

  Is it related to any memory ?

• Undefined reference to av_log

  12 novembre 2017, par Dana Prakoso

  I am cross-compiling FFMPEG source in Linux for Windows using i686-w64-mingw32 using this script :

  ../ffmpeg/configure --disable-ffmpeg --disable-ffprobe --disable-ffplay --disable-shared --enable-static --arch=x86 --target-os=mingw32 --cross-prefix=i686-w64-mingw32- --enable-cross-compile

  And it generates all static library files with extension *.a inside "lib" folder. Then I try to link those libraries with my own source, with this script :

  i686-w64-mingw32-gcc -m32 -c videoplayer.c -o videoplayer.o -w $(INCLUDEDIR) -Wl,--add-stdcall-alias
  
  i686-w64-mingw32-gcc -static -m32 -o libvideoplayer.dll videoplayer.o -Wl,--out-implib,libvideoplayer_dll.lib -Wl,--add-stdcall-alias -L../../ffmpeg/lib -lavdevice -lavformat -lavcodec -lavutil -lwsock32 -lswresample ../../ffmpeg/lib/libWs2_32.lib

  And I got this bunch of error messages :

  ../../ffmpeg/lib/libavformat.a(rtpproto.o): In function `rtp_resolve_host':
  
  /home/dana/Sources/build-ffmpeg/src/libavformat/rtpproto.c:140: undefined reference to `_imp__getaddrinfo@16'
  
  ../../ffmpeg/lib/libavformat.a(rtpproto.o): In function `rtp_parse_addr_list':
  
  /home/dana/Sources/build-ffmpeg/src/libavformat/rtpproto.c:282: undefined reference to `_imp__freeaddrinfo@4'
  
  /home/dana/Sources/build-ffmpeg/src/libavformat/rtpproto.c:277: undefined reference to `_imp__freeaddrinfo@4'
  
  ../../ffmpeg/lib/libavformat.a(tcp.o): In function `tcp_open':
  
  /home/dana/Sources/build-ffmpeg/src/libavformat/tcp.c:112: undefined reference to `_imp__getaddrinfo@16'
  
  /home/dana/Sources/build-ffmpeg/src/libavformat/tcp.c:114: undefined reference to `_imp__getaddrinfo@16'
  
  /home/dana/Sources/build-ffmpeg/src/libavformat/tcp.c:177: undefined reference to `_imp__freeaddrinfo@4'
  
  /home/dana/Sources/build-ffmpeg/src/libavformat/tcp.c:192: undefined reference to `_imp__freeaddrinfo@4'

  How do I resolve this ? Do I miss something in my script ? Big thanks for someone replying.