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• ffmpeg failed to read header of audio file

  15 juillet 2016, par asad

  The file i am using (.m4a format) cant be read by ffmpeg. I can play this audio file in quicktime and vlc successfully. ffmpeg fails to read this particular file only. ffmpeg works with other .m4a files. Note:following works for this video too if i lower fps to 1 and resolution to 480p Following is the 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"
  

  Following is the code:

  /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
  

  Please let me know what can possibly be done?

• 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?

• VPS as video relay server using ffmpeg and ffserver ?

  15 juillet 2016, par Luke E

  I'm working on a project where I need to send a video stream from a laptop through a router I don't have control of to an Android phone on another network I don't have control of. The project also involves sending a stream of sensor data the opposite direction, for which I'm using a VPS and TCP hole punching quite successfully.

  So, I thought to myself, why not just stream the video from ffmpeg on my laptop to ffmpeg on the VPS, and then relay that via ffserver to my android phone? That's what I've been trying to do for a good while now, but haven't had much luck. The stream is recognized by the server but when putting it out over ffserver I get errors. Here is my ffserver.conf:

  HTTPPort 9000
  HTTPBindAddress 
  RTSPPort 5454
  RTSPBindAddress 
  
  
  File /tmp/feed1.ffm
  FileMaxSize 50M
  
  
  
  Feed feed1.ffm
  Format rtp
  VideoSize 960x540
  VideoBufferSize 0
  VideoFrameRate 30
  NoAudio
  AVOptionVideo flags +global_header
  
  

  And here's the command I'm using to take the received stream on the VPS and transmit it to ffserver:

  ./ffmpeg -protocol_whitelist file,udp,rtp -i foo.sdp  -an -c copy -f rtp rtsp://:5454/feed1.ffm
  

  When doing this command, I get the error "rtsp://:5454/feed1.ffm: Protocol not found"

  Any advice?

  I also thought about doing this with netcat and just and trying to forward all data received on the VPS at a certain port 1234 to any client connected to say port 1235, but this appears to be much more difficult than I thought.

  Thanks again for any help, and hopefully this problem is interesting to others as well.

• What does "copy" do in a ffmpeg command line ?

  14 juillet 2016, par PsyberAlyen

  I know that it copies something but other than that what does it do (to what extend it affects the output file)? Is it a switch or option? Why does it not have a hyphen before the word itself?

  I see from other questions that it can copy streams without transcode but what are other possibility that I can manipulate it?

  I have done ffmpeg --help but I don't see any documentation about it. Is there a website I can read more about it?

• Clojure shell/sh does not handle single-quoted arguments correctly ?

  14 juillet 2016, par Jarzka

  Executing the following command in the REPL:

  (shell/sh "ls" "-lah" "'resources'")
  

  gives the following output:

  {:exit 2, :out "", :err "ls: cannot access 'resources': No such file or directory\n"}
  

  Executing the same command in the Bash shell gives the correct output, the list of files in the resources directory. To my understanding this means that shell/sh is unable to handle single-quoted arguments correctly. Is this true or am I doing something wrong?

  The example above is a simple example, as usually I probably would not need to single-quote the folder name. But why this is a real problem is because I try to concat audio files by executing the following ffmpeg command using shell/sh;

  ffmpeg -i resources/ffmpeg_working/1.flac
  -i resources/ffmpeg_working/2.flac
  -i resources/ffmpeg_working/3.flac
  -i resources/ffmpeg_working/4.flac
  -filter_complex '[0:0][1:0][2:0][3:0]concat=n=4:v=0:a=1[out]'
  -map '[out]'
  resources/ffmpeg_working/done.flac
  

  This gives the following output

  Stream map ''[out]'' matches no streams.
  

  Once again, if I execute the same ffmpeg command in the Bash shell it concatenates the files successfully. Thus, it seems that the single-quoted argument is not handle correctly?