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• doc : apply various grammar fixes

  10 août 2013, par Bryce W. Harrington

  doc : apply various grammar fixes
  The first sentence of each of the modified man pages are worded a bit
  
  awkwardly. These minor copy-edits should make them clearer.
  Signed-off-by : Bryce Harrington <b.harrington@samsung.com>
  
  Signed-off-by : Stefano Sabatini <stefasab@gmail.com>
  

  • [DH] doc/demuxers.texi
  • [DH] doc/ffmpeg.texi
  • [DH] doc/outdevs.texi
  • [DH] doc/protocols.texi

• FFmpeg android video processing does not return error message

  25 août 2018, par Дмитрий Мельчин

  friends. I am creating a program that puts the sound and picture to video. I’m using the ffmpeg library https://github.com/bravobit/FFmpeg-Android.
  The command looks like this :

  String command = "-i /data/user/0/com.radpony.vhs.camcorder/files/RADVHS/camcorder_video.mp4 -i /data/user/0/com.radpony.vhs.camcorder/files/RADVHS/watermark_png.png -i /data/user/0/com.radpony.vhs.camcorder/files/RADVHS/playarrow.png -filter_complex [0]crop=720:720[croped];[1]scale=w=143:h=50[tmp];[croped][tmp]overlay=x=577:y=10[overlayed];[overlayed][2]overlay=x=150:y=10[overlayed2];[overlayed2]drawtext=fontfile=/data/user/0/com.radpony.vhs.camcorder/cache/VCR_OSD_MONO_1_001.ttf:text='PM 11\:06Aug..25 2018':fontcolor=white:fontsize=48:x=50:y=600[withdate];[withdate]drawtext=fontfile=/data/user/0/com.radpony.vhs.camcorder/cache/VCR_OSD_MONO_1_001.ttf:text='Play':fontcolor=white:fontsize=48:x=50:y=30 -codec:a copy -c:v libx264 -preset ultrafast /data/user/0/com.radpony.vhs.camcorder/files/RADVHS/rendered_video.mp4";

  It works great for Android 6, but on the Samsung devices with Android 7 while processing of video ffmpeg just stops without displaying an error message.
  If someone knows the solution to this problem, help, please

• 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.