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• what is the correct command using gstreamer to convert mp4 to 264 file ?

  25 mars 2020, par hilow

  My english is pool, i am sorry !

  I use ffmpeg and gstreamer convert mp4 file to 264 format, but the output file is different.
  The question is :

  • 1.Why they are different file ?

  • 2.What is the level mean in gst-discoverer-1.0 ?

    Use ffmpeg it is Codec:     video/x-h264, ...... level=(string)1.2.

    Use gstreamer it is Codec:     video/x-h264, ...... level=(string)3.

  • 3.How to use gstreamer to convert the correct 264 file ?

  The original video file is come from https://github.com/notedit/media-server-go-demo/blob/master/video-mixer/public/big_buck_bunny.mp4 .

  command :

  gst-launch-1.0 filesrc location=big_buck_bunny.mp4 ! \
  
      qtdemux name=demux \
  
        demux.video_0 ! queue ! \
  
        decodebin ! \
  
        videoconvert ! \
  
        videoscale ! \
  
        videorate ! \
  
        video/x-raw,width=320,height=240,framerate=15/1,pixel-aspect-ratio=1/1,level=1.2 ! \
  
        x264enc bframes=0 byte-stream=true bitrate=9000 ! \
  
        filesink location=videogst.264
  
  
  
  ffmpeg -i big_buck_bunny.mp4 -f h264 -vcodec libx264 -s 320x240 -bf 0 -r 15 videoffmpeg.264

  output file :

  -rw-r--r-- 1 xxx staff 1.9M 3 25 13:39 videoffmpeg.264
  
  -rw-r--r-- 1 xxx staff 17M 3 25 13:40 videogst.264

  video codec :

  xxx@xxxs-MacBook-Pro resource %  gst-discoverer-1.0 videoffmpeg.264 -v
  
  Analyzing file:///Users/xxx/tool/resource/videoffmpeg.264
  
  Done discovering file:///Users/xxx/tool/resource/videoffmpeg.264
  
  
  
  Topology:
  
    video: video/x-h264, width=(int)320, height=(int)240, framerate=(fraction)15/1, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true, stream-format=(string)avc, alignment=(string)au, profile=(string)high, level=(string)1.2, codec_data=(buffer)0164000cffe100176764000cacb20283f420000003002000000303c1e2854901000668ebc3cb22c0
  
      Tags:
  
        视频编码: H.264 (High Profile)
  
  
  
      Codec:
  
        video/x-h264, width=(int)320, height=(int)240, framerate=(fraction)15/1, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true, stream-format=(string)avc, alignment=(string)au, profile=(string)high, level=(string)1.2, codec_data=(buffer)0164000cffe100176764000cacb20283f420000003002000000303c1e2854901000668ebc3cb22c0
  
      Additional info:
  
        None
  
      Stream ID: 349989c8845fcc23360fb0ab02ea7510051b926669bf8f3862879823fbab6daf
  
      Width: 320
  
      Height: 240
  
      Depth: 24
  
      Frame rate: 15/1
  
      Pixel aspect ratio: 1/1
  
      Interlaced: false
  
      Bitrate: 0
  
      Max bitrate: 0
  
  
  
  Properties:
  
    Duration: 0:01:32.995000000
  
    Seekable: yes
  
    Live: no
  
    Tags:
  
        视频编码: H.264 (High Profile)
  
  
  
  
  
  xxx@xxxs-MacBook-Pro resource % gst-discoverer-1.0 videogst.264 -v
  
  Analyzing file:///Users/xxx/tool/resource/videogst.264
  
  Done discovering file:///Users/xxx/tool/resource/videogst.264
  
  
  
  Topology:
  
    video: video/x-h264, pixel-aspect-ratio=(fraction)1/1, width=(int)320, height=(int)240, framerate=(fraction)15/1, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true, stream-format=(string)avc, alignment=(string)au, profile=(string)high, level=(string)3, codec_data=(buffer)0164001effe1001d6764001eacb20283f602d4180416940000030004000003007a3c58b92001000568ebccb22c
  
      Tags:
  
        视频编码: H.264 (High Profile)
  
  
  
      Codec:
  
        video/x-h264, pixel-aspect-ratio=(fraction)1/1, width=(int)320, height=(int)240, framerate=(fraction)15/1, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true, stream-format=(string)avc, alignment=(string)au, profile=(string)high, level=(string)3, codec_data=(buffer)0164001effe1001d6764001eacb20283f602d4180416940000030004000003007a3c58b92001000568ebccb22c
  
      Additional info:
  
        None
  
      Stream ID: fb99f4104b347e5682d52c0bd65bcee91b765e42f89ce2e3553be5d6d743a666
  
      Width: 320
  
      Height: 240
  
      Depth: 24
  
      Frame rate: 15/1
  
      Pixel aspect ratio: 1/1
  
      Interlaced: false
  
      Bitrate: 0
  
      Max bitrate: 0
  
  
  
  Properties:
  
    Duration: 0:01:45.505000000
  
    Seekable: yes
  
    Live: no
  
    Tags:
  
        视频编码: H.264 (High Profile)

• Revision 29926 : On branche spip_piwik

  17 juillet 2009, par kent1@… — Log

  On branche spip_piwik

• Unable find an ffmpeg binary for your Android system

  22 juillet 2024, par Ayush Thakur

  Working on a project where I need to use FFmpeg library in Kotlin to work on some audio files. However I'm unable to initialize the ffmpeg library itself.

  


  this is the error I'm getting

  


  Could not find an ffmpeg binary for your Android system. Did you forget calling: 'new AndroidFFMPEGLocator(this);' ?
2024-07-22 18:48:33.910 11800-11800 PipeDecoder             com.example.sangeet                  E  Tried to unpack a statically compiled ffmpeg binary for your architecture to: /data/user/0/com.example.sangeet/cache/ffmpeg
2024-07-22 18:48:33.923 11800-11800 AndroidRuntime          com.example.sangeet                  E  FATAL EXCEPTION: main (Ask Gemini)
                                                                                                    Process: com.example.sangeet, PID: 11800
                                                                                                    java.lang.Error: Decoding via a pipe will not work: Could not find an ffmpeg binary for your system


  


  @HiltAndroidApp
class Sangeet: Application(){
    override fun onCreate() {
        super.onCreate()
        provideFirebaseApp(this)
        FFmpegKitConfig.setLogLevel(Level.AV_LOG_INFO)
        FFmpegKitConfig.enableLogCallback { Log.d("ffmpeg",it.message) }
        initializeFFmpegKit()
    }
    private fun initializeFFmpegKit() {
        // This method should be sufficient to ensure FFmpegKit is ready to use
        val ffmpegSession = FFmpegKit.execute("ffmpeg -version")
        if (ReturnCode.isSuccess(ffmpegSession.returnCode)) {
            Log.d("FFmpeg", "FFmpeg is ready to use.")
        } else {
            Log.e("FFmpeg", "Failed to initialize FFmpeg: ${ffmpegSession.failStackTrace}")
            initializeFFmpegBinary()
        }
    }
    private fun initializeFFmpegBinary() {
        val ffmpegBinaryPath = filesDir.absolutePath + "/ffmpeg"
        val binaryFile = File(ffmpegBinaryPath)
        if (!binaryFile.exists()) {
            Log.e("FFmpeg", "FFmpeg binary not found at $ffmpegBinaryPath")
            // Copy or download the FFmpeg binary to this path
        } else {
            Log.d("FFmpeg", "FFmpeg binary found at $ffmpegBinaryPath")
        }
    }
}


  


  Tried using AndroidFFMPEGLocator(this) ; as suggested by the compiler in my code but unknown reference error is coming for the above line of code.

  


  Also tried using FFmpegKit.init(this) function but init is also not being recognised by the compiler