Recherche avancée

Sur d’autres sites (8893)

• Android : mp4 file plays when downloaded but when choosing "Video" player gets "Cannot play video"

  14 janvier 2014, par gview

  I've converted the video to an mp4 with ffmpeg using the h264 codec and AAC, and used the baseline profile.

  Videos are 540x360x250kbps

  I then ran qt-faststart on the file to move the atoms into the right order.

  I've stuck the file up on a wiki we use and created a link to it.

  My test phone is a Samsung Galaxy S3.

  When I browse to the page that has links to the mp4's on it, and I click on them, I get a popup window with 2 options : Internet and Video.

  If I download the videos using the "Internet" option, I can play them on the phone without issue.

  I've done other encodings with the main profile as well, and these also play fine. I thought that a powerful phone like the s3 would be able to handle the more advanced compression schemes available in h264, however I've also browsed the Android docs in regards to supported video formats, and it seems to state that only the "baseline" compression profile is supported.

  Regardless, what doesn't work is trying to use the "Video" option which I assume tries to stream the video.

  For the wiki in question, clicking on the link reveals that the content-type and content-length headers are being set :

  Content-Length  6175996
  
  Content-Type    video/mp4;charset=UTF-8

  Clicking on the link with a browser invokes a player (Quicktime in most cases) that can play the mp4's.

  Is there more to having the file HTTP streamable beyond making a link to it ? Why won't my Android 4 play these files ?

  UPDATE :
  I decided to make a quick HTML5 page using the video tag, and the videos do play on both my Galaxy S3 and the latest IOS.

• How to merge mp4 audio dash fragment with another audio

  19 décembre 2016, par mosvov

  I have 1 audio file from dash stream

   Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'file_191282-377206_header.mp4':   Metadata:
  
  
  
   major_brand     : iso6
  
   minor_version   : 1
  
   compatible_brands: mp42dashmsdhmsixiso6avc1isom
  
   creation_time   : 2016-04-29T11:04:26.000000Z   Duration: 00:00:30.02, start: 14.997333, bitrate: 49 kb/s
  
   Stream #0:0(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 48 kb/s (default)

  Also in exiftool output :

   Movie Data Size                 : 180193
  
   Movie Data Offset               : 6388

  I try to merge with another audio and save metadata info like Movie Data Size/Offset and start/duration time.
  I try with ffmpeg/MP4Box commands like :

  MP4Box -new -add file_191282-377206_header.mp4 -add out000.mp4
  
  ffmpeg -i file_191282-377206_header.mp4 -i out000.mp4 -codec copy -shortest output.mp4
  
  ffmpeg -i file_191282-377206_header.mp4 -i out000.mp4 -filter_complex amerge -ac 2 -c:a aac output.mp4

  All the time information erased or changed.

  So question is how to merge 2 audio files inside mp4 and not change Movie Size/Offset and start/duration time ?

• How to merge mp4 audio dash fragment with another audio

  18 mars 2019, par mosvov

  I have 1 audio file from dash stream

   Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'file_191282-377206_header.mp4':   Metadata:
  
  
  
   major_brand     : iso6
  
   minor_version   : 1
  
   compatible_brands: mp42dashmsdhmsixiso6avc1isom
  
   creation_time   : 2016-04-29T11:04:26.000000Z   Duration: 00:00:30.02, start: 14.997333, bitrate: 49 kb/s
  
   Stream #0:0(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 48 kb/s (default)

  Also in exiftool output :

   Movie Data Size                 : 180193
  
   Movie Data Offset               : 6388

  I try to merge with another audio and save metadata info like Movie Data Size/Offset and start/duration time.
  I try with ffmpeg/MP4Box commands like :

  MP4Box -new -add file_191282-377206_header.mp4 -add out000.mp4
  
  ffmpeg -i file_191282-377206_header.mp4 -i out000.mp4 -codec copy -shortest output.mp4
  
  ffmpeg -i file_191282-377206_header.mp4 -i out000.mp4 -filter_complex amerge -ac 2 -c:a aac output.mp4

  All the time information erased or changed.

  So question is how to merge 2 audio files inside mp4 and not change Movie Size/Offset and start/duration time ?