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• how to configure ffmpeg to transplant to iphone sdk 5.1 simulator and play h264 ?

  19 décembre 2012, par user1204703

  I use lastest "ffmpeg-1.0.1" and "ffmpeg-iphone-build",to transplant fffmpeg to iphone sdk 5.1 simulator.

  and use the build-i386 script in the "ffmpeg-iphone-build" project . also I add "—enable-decoder=h264" to the "CONFIGURE_OPTIONS".

  just this :

  CONFIGURE_OPTIONS="--enable-gpl --enable-postproc --enable-swscale --enable-avfilter --disable-asm --enable-cross-compile --enable-decoder=h264"

  then execute "./build-i386".
  and I also execute below batch :

  #!/bin/tcsh -f
  
  
  
  mkdir universal
  
  
  
  mkdir lib
  
  
  
  
  
  mkdir i386
  
  
  
  
  
  mv ffmpeg-i386/libavcodec/libavcodec.a i386/
  
  
  
  mv ffmpeg-i386/libavdevice/libavdevice.a i386/
  
  
  
  mv ffmpeg-i386/libavformat/libavformat.a i386/
  
  
  
  mv ffmpeg-i386/libavutil/libavutil.a i386/
  
  
  
  mv ffmpeg-i386/libswscale/libswscale.a i386/
  
  
  
  
  
  
  
  rm universal/*.a
  
  
  
  lipo -create -arch i386 i386/libavcodec.a -output universal/libavcodec.a
  
  
  
  lipo -create -arch i386 i386/libavdevice.a -output universal/libavdevice.a
  
  
  
  lipo -create -arch i386 i386/libavformat.a -output universal/libavformat.a
  
  
  
  lipo -create -arch i386 i386/libavutil.a -output universal/libavutil.a
  
  
  
  lipo -create -arch i386 i386/libswscale.a -output universal/libswscale.a
  
  
  
  rm lib/*.a
  
  
  
  cp universal/*.a lib/

  then I use the "iFreameExtractor" demo, modify the video file to "test.h264".
  code like :

  - (void)applicationDidFinishLaunching:(UIApplication *)application {    
  
      self.video = [[VideoFrameExtractor alloc] initWithVideo:[Utilities bundlePath:@"test.h264"]];
  
  }

  then run with IPhone 5.1 Simulator.
  but, fail with error :

  [h264 @ 0x91f1800] max_analyze_duration 5000000 reached at 5019130
  
  [h264 @ 0x91f1800] Estimating duration from bitrate, this may be inaccurate
  
  [swscaler @ 0x9203600] No accelerated colorspace conversion found from yuv420p to rgb24.
  
  2012-12-19 20:19:54.419 iFrameExtractor[52708:f803] video duration: -9223372036854.775391

  I think that the reason why it can not play h264 file that when I transplant the fffmpeg to the iphone simulator, and maybe do something wrong with the configure options.
  but I do not know how to fix it.

  Can you show the correct configure or other advices ?

  Thanks for your reply ??
  I am going to crash.

• iPhone recorded videos getting rotated on Windows systems [migrated]

  11 mars 2013, par Saurabh

  I am recording videos on iPhone and uploading them to my Linux server. Users can see these videos on website. If users are seeing videos on mac or iDevices the video is looking fine but when users are seeing that video on windows systems these videos are getting rotated.

  I am assuming this is because of some apple's flag in the recorded video which Windows systems are not able to read. Can I record videos in some way so they don't get rotated on Windows systems ? Or is there any way I can re-encode videos with proper interface orientation using FFmpeg ?

  I am open to both FFmpeg or iOS way.

• Video created via ffmpeg will not play on iPhone 10 or Huawei Android using Chrome

  17 février 2020, par MHatton

  I have created a video from a image and adding an MP3 file. It plays fine on my Moto G Android phone and on my desktop, but a collegue has said it will not play on his iPhone 10 or Huawei Android phone running Chrome.

  Does the following ffmpeg need an extra command adding to make the created MP4 more compatible across devices ?

  ffmpeg -loop 1 -i 6f4aa5dfefc4dd32186f41315ad9d1e2-0.png -i "download.mp3" -c:v libx264 -tune stillimage -c:a aac -b:a 192k -pix_fmt yuv420p -shortest aw-slide0.mp4