Sur d’autres sites (7110)

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

  11 juillet 2019, 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.

• ffmpeg and libaom compilation failed "unable to open include file `third_party/x86inc/x86inc.asm"

  7 octobre 2023, par sam

  I'm trying to build ffmpeg using this guide :
https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu

  


  the problem is when i try to compile libaom using the following commands :

  


  cd ~/ffmpeg_sources && \
git -C aom pull 2> /dev/null || git clone --depth 1 https://aomedia.googlesource.com/aom && \
mkdir -p aom_build && \
cd aom_build && \
PATH="$HOME/bin:$PATH" cmake -G "Unix Makefiles" -DCMAKE_INSTALL_PREFIX="$HOME/ffmpeg_build" -DENABLE_TESTS=OFF -DENABLE_NASM=on ../aom && \
PATH="$HOME/bin:$PATH" make && \
make install


  


  i get the following error :

  


  /root/ffmpeg_sources/aom/aom_dsp/x86/sad4d_sse2.asm:14: fatal: unable to open include file `third_party/x86inc/x86inc.asm'
CMakeFiles/aom_dsp_encoder_sse2.dir/build.make:62: recipe for target 'CMakeFiles/aom_dsp_encoder_sse2.dir/aom_dsp/x86/sad4d_sse2.asm.o' failed
make[2]: *** [CMakeFiles/aom_dsp_encoder_sse2.dir/aom_dsp/x86/sad4d_sse2.asm.o] Error 1
CMakeFiles/Makefile2:842: recipe for target 'CMakeFiles/aom_dsp_encoder_sse2.dir/all' failed
make[1]: *** [CMakeFiles/aom_dsp_encoder_sse2.dir/all] Error 2
Makefile:129: recipe for target 'all' failed
make: *** [all] Error 2


  


  Is there any fix for this issue ?

  


• transcoding legacy MJPEG camera stream using ffmpeg to rstp stream

  1er décembre 2013, par Arcko

  I am trying out this solution to transcoding legacy MJPEG camera stream using ffmpeg to rstp stream, which originally posted on http://www.wowza.com/forums/showthread.php?11218-Transcoding-Solution-For-Legacy-MJPEG-Cameras

  As the post is a little old, so it seems not working well in ubuntu 12.04 with the latest ffmpeg source code from git ://source.ffmpeg.org/ffmpeg.git

  Here's the steps :

  1. Compile and installed ffmpeg follwing guide https://trac.ffmpeg.org/wiki/UbuntuCompilationGuide

  2. Created ffserver.conf and running ffserver successfully using server.sh

      !/bin/bash

     while [ 1 ]
     do
     ffserver -loglevel verbose
     done

  3. created pull_stream_http.php following the guide

  4. Created stream.sh and running :

      !/bin/bash

     while [ 1 ]
     do

     php -f pull_stream_http.php | ffmpeg -an -f mjpeg -maxrate 500 -b24k -r 6 -i - 6 http://[serverip]:8090/feed1.ffm

     php -f pull_stream_http.php | ffmpeg -an -f mjpeg -r -i -vcodec libx264 -map 0 -vpre fastfirstpass -vpre baseline -b 24k -bt 32k -threads 0 http://[serverip]:8090/feed1.ffm

     done

  Now comes the error with stream.sh : "Invalid input file index : 0".

  Any one who familiar with ffmpeg would give some advice ?

  Thanks,
  Arcko