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• Android FFmpeg reports "file protocol not found"

  27 avril 2017, par Abdul Mateen

  I am trying to convert sequence images to video using ffmpeg command in android. I have build ffmpeg for android and put ffmpeg binary file in /data/local folder. I am running ffmpeg command using Runtime.getruntime.execute("mycommand") in Android.

  Stucture of mycommand is like this

  "/data/local/ffmpeg -r 40 qscale 2 -i /mnt/sdcard/images/img%d.jpg /mnt/sdcard/images/finalvideo.mp4" 
  

  mycommand contains the path of a folder where I placed all my sequence images. Running this command gives me error "protocol not found".

  Also I read that file protocol is default in ffmpeg documentation.

  How can I run such commands?

  The Error I am getting after running simple command like ffmpeg -i /mnt/sdcard/vid.mp4

  ffmpeg version 0.11.1.git Copyright (c) 2000-2012 the FFmpeg developers
  built on Sep 26 2012 11:58:35 with gcc 4.4.3 (GCC)
  configuration: --target-os=linux --prefix=/home/esteves/android-ffmpeg --enable-cross-compile --enable-runtime-cpudetect --disable-asm --arch=arm --cc=/home/esteves/android-ndk/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-gcc --cross-prefix=/home/esteves/android-ndk/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi- --disable-stripping --nm=/home/esteves/android-ndk/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-nm --sysroot=/home/esteves/android-ndk/platforms/android-8/arch-arm --enable-nonfree --enable-version3 --disable-everything --enable-gpl --disable-doc --enable-avresample --enable-demuxer=amr --enable-demuxer=aac --enable-demuxer=rawvideo --enable-demuxer=rtsp --enable-muxer=rtsp --enable-muxer=flv --enable-muxer=mpegts --enable-muxer=mp4 --enable-demuxer=rtp --enable-demuxer=rtp --disable-ffplay --disable-ffserver --enable-ffmpeg --disable-ffprobe --enable-libx264 --enable-encoder=libx264   libavutil      51. 72.100 / 51. 72.100
  libavcodec     54. 55.100 / 54. 55.100
  libavformat    54. 25.105 / 54. 25.105
  libswscale      2.  1.101 /  2.  1.101
  error of main   libswresample   0. 15.100 /  0. 15.100
  error of main   libpostproc    52.  0.100 / 52.  0.100
  /mnt/sdcard/vid.mp4: Protocol not found
  

• FFMPEG : get last 10 seconds [closed]

  27 avril 2017, par GeeHopper

  I'm trying to get the 10 last seconds of a video of which I dont know the length and then save those 10 seconds as a new video. Is this do able with the ffmpeg command prompt? And if so, how?

  Thanks for the help

  Greets

• ffmpeg - how to extract last minute of video [duplicate]

  27 avril 2017, par WarMineWorld

  This question already has an answer here:

  • FFMPEG: get last 10 seconds [closed] 1 answer

  Is it possible to have ffmpeg just output the last minute of video. I am looking to extract parts out of many files that range in length, and I would not want to do this all by hand.

• Produce waveform video from audio using FFMPEG

  27 avril 2017, par RhythmicDevil

  I am trying to create a waveform video from audio. My goal is to produce a video that looks something like this

  

  For my test I have an mp3 that plays a short clipped sound. There are 4 bars of 1/4 notes and 4 bars of 1/8 notes played at 120bpm. I am having some trouble coming up with the right combination of preprocessing and filtering to produce a video that looks like the image. The colors dont have to be exact, I am more concerned with the shape of the beats. I tried a couple of different approaches using showwaves and showspectrum. I cant quite wrap my head around why when using showwaves the beats go past so quickly, but using showspectrum produces a video where I can see each individual beat.

  ShowWaves

  ffmpeg -i beat_test.mp3 -filter_complex "[0:a]showwaves=s=1280x100:mode=cline:rate=25:scale=sqrt,format=yuv420p[v]" -map "[v]" -map 0:a output_wav.mp4
  

  This link will download the output of that command.

  ShowSpectrum

  ffmpeg -i beat_test.mp3 -filter_complex "[0:a]showspectrum=s=1280x100:mode=combined:color=intensity:saturation=5:slide=1:scale=cbrt,format=yuv420p[v]" -map "[v]" -an -map 0:a output_spec.mp4
  

  This link will download the output of that command.

  I posted the simple examples because I didn't want to confuse the issue by adding all the variations I have tried.

  In practice I suppose I can get away with the output from showspectrum but I'd like to understand where/how I am thinking about this incorrectly. Thanks for any advice.

  Here is a link to the source audio file.

• FFmpeg GIF dump & video slideshow errors

  27 avril 2017, par Techie Android

  I'm running Windows 10 and have the latest static 64bit nightly FFmpeg version. Here are my scripts, I've been trying to get them fixed but I can't seem to get either to work.

  I have a GIF file named gif.gif that I need the frames dumped out of and named in this order: img000.png img001.png img002.png and so forth.

  ffmpeg -i "gif.gif" "%img%%03d.png"
  

  It's error message is:

  [NULL @ 052857c0] Unable to find a suitable output format for 'C:\Users\username' C:\Users\username: Invalid argument

  This is where I need the individual frames to be encoded into a video file and get it to duplicate the frames necessary to make it a slideshow. It should copy each frame 150 times so that they will last for 5s each at 30fps. The filename is video maker.bat

  ffmpeg -i %img%%03d.png -framerate 1/5 -c:v libx264 -r 30 -pix_fmt yuv420p "output.mp4"
  

  It's error message is:

  imgC:\myfilesdirectoryhere\video maker.bat3d.png: Protocol not found