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• Can't play MP4 after download

  14 August 2018, by joe

  I am using a downloader program in Firefox to download videos playing in Firefox. Most of the time final MP4 is playable. But sometimes I get MP4 file that looks good(shows file size) but shows no length of video in file explorer.

  I get this error log.

  Could not get information from media 'ESPN 2 (HD) Live Stream Channel' from file 'C:\Download\dwHelper\ESPN 2 (HD) Live Stream Channel.mp4'. The file might be corrupted.
  
  
  
  {
  
      "file": "C:\\Download\\dwHelper\\ESPN 2 (HD) Live Stream Channel.mp4",
  
      "stat": {
  
          "dev": 3831878042,
  
          "mode": 33206,
  
          "nlink": 1,
  
          "uid": 0,
  
          "gid": 0,
  
          "rdev": 0,
  
          "ino": 9007199254752056,
  
          "size": 610722524,
  
          "atimeMs": 1534241605017.09,
  
          "mtimeMs": 1534241604156.685,
  
          "ctimeMs": 1534241604426.08,
  
          "birthtimeMs": 1534237675494.6475,
  
          "atime": "2018-08-14T10:13:25.017Z",
  
          "mtime": "2018-08-14T10:13:24.157Z",
  
          "ctime": "2018-08-14T10:13:24.426Z",
  
          "birthtime": "2018-08-14T09:07:55.495Z"
  
      }
  
  }
  
  Exit code: 1
  
  ffprobe version n4.0-1-gdc49a24-vdhcoapp Copyright (c) 2007-2018 the FFmpeg developers

  built with gcc 5.3.1 (GCC) 20160211

  configuration: —cross-prefix=x86_64-w64-mingw32- —sysroot=/usr/x86_64-w64-mingw32/ —extra-ldflags=-static-libgcc —target-os=mingw32 —arch=x86_64 —prefix=/home/mig/vdhcoapp/converter/src-build/win/64/converter-build —extra-version=vdhcoapp —extra-cflags=-I/home/mig/vdhcoapp/converter/src-build/win/64/deps/include —extra-ldflags=’-static-libgcc -L/home/mig/vdhcoapp/converter/src-build/win/64/deps/lib -L/home/mig/vdhcoapp/converter/src-build/win/64/zlib’ —extra-libs=-lpthread —pkg-config=/usr/bin/x86_64-w64-mingw32-pkg-config —enable-shared —enable-gpl —enable-pthreads —disable-w32threads —enable-libmp3lame —enable-libopenjpeg —enable-libopus —enable-libtheora —enable-libvorbis —enable-libvpx —enable-libwebp —enable-libx265 —enable-libxvid —enable-libx264 —enable-avresample —disable-doc

  libavutil 56. 14.100 / 56. 14.100

  libavcodec 58. 18.100 / 58. 18.100

  libavformat 58. 12.100 / 58. 12.100

  libavdevice 58. 3.100 / 58. 3.100

  libavfilter 7. 16.100 / 7. 16.100

  libavresample 4. 0. 0 / 4. 0. 0

  libswscale 5. 1.100 / 5. 1.100

  libswresample 3. 1.100 / 3. 1.100

  libpostproc 55. 1.100 / 55. 1.100

  [mov,mp4,m4a,3gp,3g2,mj2 @ 00000000024c3900] moov atom not found

  C:\Download\dwHelper\ESPN 2 (HD) Live Stream Channel.mp4: Invalid data found when processing input

  It looks like moov atom is missing thus can’t aggregate PART file into final playable MP4.

  I understand that during download, PART file is created. Then later PART is aggregated into final MP4.

  So question is how can I make this MP4 to play?
  or is it impossible to play cus moov atom was not properly downloaded?

  Any thoughts?
  Thanks

• Use FFMPEG to merge RTSP stream from 4 web cameras into a single mosaic stream to YouTube Live [duplicate]

  19 October 2020, by Richard West

  I'm trying to take a live RSTP feed from 4 different cameras and create a 2x2 tile mosaic video stream to push to YouTube Live.

  


  I have good results using the ofllowing comand for a single feed, but I have not have any luck in using some of the samples I have found for a 2x2 mosiac.

  


  Some of the camera feeds are 3840x2160 and others are 1920x1080. So I'm expecting that I will need to have some resize logic in place. I would be happy with a 1920x1080 output feed pushed to YouTube.

  


  My current, single camera command, which yields good results, is:

  


  ffmpeg -rtsp_transport tcp -i rtsp://192.168.1.42:7447/xxxxxxxx -tune zerolatency -vcodec libx264 -pix_fmt + -c:v copy -c:a aac -strict experimental -f flv rtmp://a.rtmp.youtube.com/live2/xxxx-xxxx-xxxx-xxxx-xxxx

  


  If I could specific a single camera to pull sound from that would be awesome, but I'd also be happy with no sound if that is necessary.

  


• How can I get metadata of playing track when I stream via ffmpeg?

  10 June 2022, by Viktor Kushnir

  I have one video.mp4 in loop and collection of mp3 that also plays in loop.

  


  start.sh

  


  #! /bin/bash

VBR="4500k"
FPS="30"
QUAL="superfast"

YOUTUBE_URL="rtmp://a.rtmp.youtube.com/live2/XXXX-XXXX-XXXX-XXXX-XXXX"
VIDEO_SOURCE="video.mp4"
AUDIO_ENCODER="aac"

ffmpeg \
-stream_loop -1 \
-re \
-i "$VIDEO_SOURCE" \
-thread_queue_size 512 \
-stream_loop -1 \
-re \
-f concat -i playlist.txt \
-vf drawtext="fontfile=OpenSans.ttf:text='Track Title':fontsize=26:fontcolor=white:borderw=1:bordercolor=black:x=40:y=1020" \
-map 0:v:0 -map 1:a:0 \
-map_metadata:g 1:g \
-c:v libx264 -preset $QUAL -r $FPS -g $(($FPS *2)) -b:v $VBR -bufsize 3000k -maxrate $VBR \
-c:a $AUDIO_ENCODER -ar 44100 -b:a 128k -pix_fmt yuv420p \
-f flv \
-flvflags no_duration_filesize \
$YOUTUBE_URL 


  


  I want to show in drawtext playing track metadata like title, artist...
ffmpeg show me only frame, fps, bitrate..

  


  frame=29717 fps= 25 q=19.0 size=  420802kB time=00:19:47.80 bitrate=2902.2kbits/s speed=0.999x


  


  Is it posible?
Thank you