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• ffmpeg showing "Error initializing output stream 0:0"

  31 juillet 2017, par user2565010

  I am running the following command

  ffmpeg -i DJI_0001.MOV DJI_0001.mp4

  in order to convert the video to mp4 from MOV with no other property changes.

  The issue is that I am getting :

  ffmpeg version N-86863-g2ba20d799a-static http://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2017 the FFmpeg developers
  
    built with gcc 6.4.0 (Debian 6.4.0-2) 20170724
  
    configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-6 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gray --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzimg
  
    libavutil      55. 69.100 / 55. 69.100
  
    libavcodec     57.102.100 / 57.102.100
  
    libavformat    57. 76.100 / 57. 76.100
  
    libavdevice    57.  7.100 / 57.  7.100
  
    libavfilter     6. 95.100 /  6. 95.100
  
    libswscale      4.  7.101 /  4.  7.101
  
    libswresample   2.  8.100 /  2.  8.100
  
    libpostproc    54.  6.100 / 54.  6.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'DJI_0001.MOV':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 538182144
  
      compatible_brands: qt  
  
      creation_time   : 2017-07-23T17:04:58.000000Z
  
      location        : 
  
      location-{    : 
  
      comment         : 0.9.142
  
    Duration: 00:00:17.89, start: 0.000000, bitrate: 60017 kb/s
  
      Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 4096x2160 [SAR 1:1 DAR 256:135], 60014 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc (default)
  
      Metadata:
  
        creation_time   : 2017-07-23T17:04:58.000000Z
  
        handler_name    : DJI.AVC
  
        encoder         : Dji AVC encoder
  
  File 'DJI_0001.mp4' already exists. Overwrite ? [y/N] y
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  
  Press [q] to stop, [?] for help
  
  [libx264 @ 0x3ed56a0] using SAR=1/1
  
  [libx264 @ 0x3ed56a0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
  
  Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
  
  Conversion failed!

  I see no other error message that would indicate an underlying problem. Could anybody please give me some info on how should I fix it ?

• IllegalStateException while compressing video at "dequeueOutputBuffer()" [on hold]

  11 juillet 2017, par Mr Narendra

  I’ve also checked a few or more similar posted questions, but none of them was having any satisfying response.

  My requirement is to compress videos in approx. 1-2 minutes.
  The video size restriction in my app is 500 MB and the duration limit is 4 minutes.

  The commands, I have tried -

  -i /storage/sdcard0/Videos/Lat_test.mp4 -r 20 -vcodec mpeg4 -preset ultrafast -c:a copy -tune fastdecode -strict -2 -b:v 150k
  /storage/sdcard0/Videos/output.mp4

  -y -i /storage/sdcard0/Videos/test3.mp4 -crf 24 -vcodec mpeg4 -preset ultrafast -c:a copy -me_method zero -tune fastdecode -tune zerolatency
  -strict -2 -b:v 1000k -pix_fmt yuv420p /storage/sdcard0/Videos/output.mp4

  and a few more mentioned here

  1) https://github.com/Tourenathan-G5organisation/SiliCompressor (the one using MediaCodec, instead of FFMPEG).

  2) https://github.com/lalongooo/VideoCompressor

  When tried with Samsung Galaxy Grand GT-i9082, version 5.0.1 (rooted), it failed with the below error -

  > java.lang.IllegalStateException
  
  > at android.media.MediaCodec.native_dequeueOutputBuffer(Native Method)
  
  > at android.media.MediaCodec.dequeueOutputBuffer(MediaCodec.java:1033)
  
  > at com.iceteck.silicompressorr.videocompression.MediaController.convertVideo(MediaController.java:491)
  
  > at com.iceteck.silicompressorr.SiliCompressor.compressVideo(SiliCompressor.java:300)
  
  > at com.iceteck.silicompressor.SelectPictureActivity$VideoCompressAsyncTask.doInBackground(SelectPictureActivity.java:379)
  
  > at com.iceteck.silicompressor.SelectPictureActivity$VideoCompressAsyncTask.doInBackground(SelectPictureActivity.java:358)
  
  > at android.os.AsyncTask$2.call(AsyncTask.java:288)
  
  > at java.util.concurrent.FutureTask.run(FutureTask.java:237)
  
  > at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
  
  > at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
  
  > at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
  
  > at java.lang.Thread.run(Thread.java:818)

  Please suggest how to resolve this issue.

  Or please suggest any other better video compressing approach / sample / reference, if possible

  I have tried various samples of video compression using FFMPEG, as well as MediaCodec, but none of them are working well. A few are very very slow. and rest gets failed in a few devices.

• Play h.264 video stream in html page

  12 juin 2017, par e2l3n

  I am using ffmpeg and vlc on linux to produce MPEG transport stream (mpegts) over HTTP. Basically ffmpeg captures the screen and produces h.264 stream using mpegts and then vlc is used as a server that delivers the stream over http. That’s how I manage to accomplish this.

  ffmpeg -f x11grab -s 1280x800 -r 30 -i :0.0+0,0  -f alsa -ac 2 -i pulse -vcodec libx264 -preset ultrafast -s 1280x800 -threads 0 -f mpegts - | vlc -I dummy - --sout '#std{access=http,mux=ts,dst=:3030}

  And some useful log about the resulting stream :

  Output #0, mpegts, to 'pipe:':
  
    Metadata:
  
      encoder         : Lavf57.72.101
  
      Stream #0:0: Video: h264 (libx264), yuv444p(progressive), 1280x800, q=-1--1, 30 fps, 90k tbn, 30 tbc
  
      Metadata:
  
        encoder         : Lavc57.96.101 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
      Stream #0:1: Audio: mp2, 48000 Hz, stereo, s16, 384 kb/s
  
      Metadata:
  
        encoder         : Lavc57.96.101 mp2

  All looks good except for that I am unable to play the stream in a HTML page. Could someone point me at some solution to either render the stream in HTML page or change the stream type so that it gets rendered.
  Thank you in advance !

  EDIT :
  I’ve noticed something weird. The <video></video> fails to play mp4 files on Firefox (51.0.1) for Ubuntu (I have also tested on Windows 8 with Chrome).
  I simply use ffmpeg to record screen for 10 seconds and produce .mp4 video (see below).

  ffmpeg -video_size 1280x800 -framerate 25 -f x11grab -i :0.0+0,0 -t 00:00:10 ~/Workspace/videostream/output.mp4

  And then play the output.mp4 video with the following snippet.

  <video width="480" height="320" controls="controls">
  
      <source src="output.mp4" type="video/mp4">
  
  </source></video>

  This simply does not play although I can open the video with any other media player. The media info (using MediaInfo, v0.7.96) of the output.mp4 file is :

  GENERAL: MPEG-4 (Base Media): 1.007 MiB, 10s 0ms; 1 Video stream: AVC; Overall bit rate: 825 Kbps; Writing application: Lavf57.72.101
  
  VIDEO: 2 343 Kbps, 1280*800(16:10), at 25.000 fps, MPEG Video (Version 2) (Main@High 1440)

  However, if I replace the output.mp4 with any other .mp4 file, it does play in Firefox. So, this leads me to conclude that it is not a browser issue but something with the way I exploit ffmpeg. Below is the media info of a proper .mp4 file that successfully runs in the browser.

  GENERAL: MPEG-4 (Base Media/Version 2): 48.4 MiB, 2mn 50s; 1 Video stream: AVC; 1 Audio stream: AAC; Overall bit mode rate: Variable; Overall bit rate: 2 385 Kbps;
  
  VIDEO: 2 256 Kbps, 1280*720(16:9), at 25.000 fps, AVC (Main@L3.1) (CABAC / 3 Ref Frames); ISO media produced by Google Inc.
  
  AUDIO:
  
  126 Kbps, 44.1 KHz, 2 channels, AAC (LC), ISO media produced by Google Inc.

  And here is the media info of the output file that results from redirecting the h.264 mpegts stream using the ffmpeg command with -pix_fmt yuv420p ./ffmpeg -t 00:00:10 -f x11grab -s 1280x800 -r 30 -i :0.0+0,0 -pix_fmt yuv420p -vcodec libx264 -preset ultrafast -s 1280x800 -threads 0 -f mpegts - > ~/Workspace/file.ts :

  GENERAL: MPEG-TS: 2.93 MiB, 9s 960ms; 1 Video stream: MPEG Video; 1 Menu stream: MPEG Video; Overall bit rate mode: Variable; Overall bit rate: 2 465 Kbps; 
  
  VIDEO: 2 343 Kbps, 1280*800(16:10), at 25.000 fps, MPEG Video (Version 2) (Main@High 1440)