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• The .mp4 video does not play, which is created from ffmpeg library (not command line)

  25 septembre 2013, par user1914692

  I use ffmpeg library to encode frames to a .mp4 video. The program runs smoothly without error. But the output .mp4 video does not play. Properties of the file does not even show it is a video file, no any information of video stream.

  The related code is :

  const char* ouVideoFileName = "output.mp4";
  
  AVCodecID ouCodec_id = CODEC_ID_H264;

  But if I change it to :

  const char* ouVideoFileName = "output.avi";
  
  AVCodecID ouCodec_id = CODEC_ID_H264;

  The .avi video plays correctly.

  What's wrong with .mp4 video ?

• AS3 AIR Detecting video play completion with FFMPEG

  21 août 2015, par AntBirch

  I’m using FFMPEG with AS3 as I need to be able to allow the use of multiple video formats. The problem I’m having is that whilst using FFMPEG the following netStatus will never get triggered - NetStream.Play.Stop

  I’ve tried adding onPlayStatus and onStatus to the client but it seems that FFMPEG doesn’t work with these either. The only way I currently have of knowing if the video is finished is by using "NetStream.Buffer.Empty" but this really isn’t practical and may cause issues in the long run.

  I previously had an issue with being unable to trace out the netStream duration with FFMPEG which resulted in the use of ProgressEvent. Is this function the way forward for my current issue ?

  Thanks in advance.

  EDIT 1 : It may be possible that because NetStream is a sealed class that I have to use an internal class to add the onPlayStatus function to it ? I’ve added netStream.client = new Client();

  EDIT 2 : Can’t seem to find a way to call onPlayStatus.

  EDIT 3 : Not sure if it’s worth noting but netStream.time never seems to match netStream.bufferlength when the video has finished.

• mp4 format video can not play in ios

  15 juin 2022, par parsa

  I've problem for the playing mp4 format videos on ios and sometimes it no have any problem and play correctly.

  Videos with mkv format stores In my server daily,

  And I copy the codecs to mp4 to can support video playing in ios with this command of ffmpeg :

  


  ffmpeg -i Axl_Rose.mkv -map 0 -c copy -c:a aac -movflags +faststart Axl_Rose.mp4


  


  Sometimes the output can not play in ios.
This is the ffprobe details of output file of top command which could not play on ios :

  


  ffprobe version 4.2.7-0ubuntu0.1 Copyright (c) 2007-2022 the FFmpeg developers
built with gcc 9 (Ubuntu 9.4.0-1ubuntu1~20.04.1)
configuration: --prefix=/usr --extra-version=0ubuntu0.1 --toolchain=hardened -- 
libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 
--enable-gpl --disable-stripping --enable-avresample --disable-filter=resample -- 
enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass -- 
enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable- 
libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable- 
libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame -- 
enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable- 
libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy 
--enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable- 
libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack 
--enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq - 
-enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable- 
opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 -- 
enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
libavutil      56. 31.100 / 56. 31.100
libavcodec     58. 54.100 / 58. 54.100
libavformat    58. 29.100 / 58. 29.100
libavdevice    58.  8.100 / 58.  8.100
libavfilter     7. 57.100 /  7. 57.100
libavresample   4.  0.  0 /  4.  0.  0
libswscale      5.  5.100 /  5.  5.100
libswresample   3.  5.100 /  3.  5.100
libpostproc    55.  5.100 / 55.  5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 
'Axl_Rose.mp4':
Metadata:
major_brand     : isom
minor_version   : 512
compatible_brands: isomiso2mp41
encoder         : Lavf57.83.100
Duration: 00:07:37.88, start: 0.000000, bitrate: 566 kb/s
Stream #0:0(eng): Video: vp9 (Profile 0) (vp09 / 0x39307076), yuv420p(tv, bt709), 
854x480, 429 kb/s, SAR 1:1 DAR 427:240, 29.97 fps, 29.97 tbr, 16k tbn, 16k tbc 
(default)
Metadata:
  handler_name    : VideoHandler
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 
kb/s (default)
Metadata:
  handler_name    : SoundHandler


  


  What should I do, and whats the problem ?