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MediaSPIP Simple : futur thème graphique par défaut ?
26 septembre 2013, par
Mis à jour : Octobre 2013
Langue : français
Type : Video
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Mis à jour : Mai 2013
Langue : français
Type : Image
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Mis à jour : Avril 2013
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Sur d’autres sites (16719)
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Camera app fails on android ffmpeg application
22 mars 2021, par connor449I am trying to run a simple video recorder app on android. The code is below :


package com.example.camera

//import android.R
import android.content.DialogInterface
import android.content.pm.PackageManager
import android.os.Build
import android.os.Bundle
import android.widget.Toast
import androidx.appcompat.app.AlertDialog
import androidx.appcompat.app.AppCompatActivity
import androidx.core.app.ActivityCompat
import androidx.core.content.ContextCompat
import com.arthenica.mobileffmpeg.FFmpeg


const val EXTRA_MESSAGE = "com.example.myfirstapp.MESSAGE"

class MainActivity : AppCompatActivity() {
 override fun onCreate(savedInstanceState: Bundle?) {
 super.onCreate(savedInstanceState)
 setContentView(R.layout.activity_main)
 if (checkPermission()) {
 //main logic or main code
 FFmpeg.execute("-f android_camera -i 0:0 -r 30 -pixel_format bgr0 -t 00:00:05 /sdcard/test.mp4")

 // . write your main code to execute, It will execute if the permission is already given.
 } else {
 requestPermission()
 }
 }

 private fun checkPermission(): Boolean {
 return if (ContextCompat.checkSelfPermission(this, android.Manifest.permission.CAMERA)
 != PackageManager.PERMISSION_GRANTED
 ) {
 // Permission is not granted
 false
 } else true
 }

 private fun requestPermission() {
 ActivityCompat.requestPermissions(
 this, arrayOf(android.Manifest.permission.CAMERA),
 PERMISSION_REQUEST_CODE
 )
 }

 override fun onRequestPermissionsResult(
 requestCode: Int,
 permissions: Array<string>,
 grantResults: IntArray
 ) {
 when (requestCode) {
 PERMISSION_REQUEST_CODE -> if (grantResults.size > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED
 ) {
 Toast.makeText(applicationContext, "Permission Granted", Toast.LENGTH_SHORT)
 .show()

 // main logic
 } else {
 Toast.makeText(applicationContext, "Permission Denied", Toast.LENGTH_SHORT)
 .show()
 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
 if (ContextCompat.checkSelfPermission(this, android.Manifest.permission.CAMERA)
 != PackageManager.PERMISSION_GRANTED
 ) {
 showMessageOKCancel("You need to allow access permissions",
 DialogInterface.OnClickListener { dialog, which ->
 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
 requestPermission()
 }
 })
 }
 }
 }
 }
 }

 private fun showMessageOKCancel(
 message: String,
 okListener: DialogInterface.OnClickListener
 ) {
 AlertDialog.Builder(this@MainActivity)
 .setMessage(message)
 .setPositiveButton("OK", okListener)
 .setNegativeButton("Cancel", null)
 .create()
 .show()
 }

 companion object {
 private const val PERMISSION_REQUEST_CODE = 200
 }
}


</string>

The main command to call the video recorder is here :


FFmpeg.execute("-f android_camera -i 0:0 -r 30 -pixel_format bgr0 -t 00:00:05 /sdcard/test.mp4")


The app opens on my android 10 Motorola G Power. I tap 'allow' for allowing permissions. Then the app crashes and I keep getting this error :


2021-03-22 13:42:51.534 31138-31138/com.example.camera E/AndroidRuntime: FATAL EXCEPTION: main
 Process: com.example.camera, PID: 31138
 java.lang.IllegalStateException: Could not find method sendMessage(View) in a parent or ancestor Context for android:onClick attribute defined on view class com.google.android.material.button.MaterialButton with id 'button2'
 at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.resolveMethod(AppCompatViewInflater.java:436)
 at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:393)
 at android.view.View.performClick(View.java:7161)
 at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:967)
 at android.view.View.performClickInternal(View.java:7133)
 at android.view.View.access$3500(View.java:804)
 at android.view.View$PerformClick.run(View.java:27416)
 at android.os.Handler.handleCallback(Handler.java:883)
 at android.os.Handler.dispatchMessage(Handler.java:100)
 at android.os.Looper.loop(Looper.java:241)
 at android.app.ActivityThread.main(ActivityThread.java:7617)
 at java.lang.reflect.Method.invoke(Native Method)
 at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:941)
2021-03-22 13:42:51.546 31138-31138/com.example.camera I/Process: Sending signal. PID: 31138 SIG: 9


What am I doing wrong ? Please advise.


edit


layout xml


<?xml version="1.0" encoding="utf-8"?>


 

 



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ffmpeg status & quality / cuda (CPU/GPU)
18 avril 2015, par coccoffmpeg am i doing it right ?
So much time has passed since i use ffmpeg to convert clips on my home web server, now that mp4 (h264 & aac) is the current overall standard (works on every console, smartphone, smartTV, pc) i decided to convert my old clips from various digital cameras to to this new container/codecs.
- less space & the same quality.
- compatibility
- support for tags (subler for mac)
after some research i opted for ffmpeg because of various reasons
- commandline (i made my simple web interface with default settings wich i execute with php’s exec)
- the quality/size amount
I read that many expensive video conversion softwares are not able to handle low bitrate videos properly. I also tested some of them and personally i could not find the proper export settings or i was not impressed by the results... some had fixed default export setings, most had a lower video quality at the same filesize. ffmpeg allows me to set the -crf (18-24 usually) and -preset (veryslow, fast..) witch allows me to reduce the filesize drastically mantaining the same
visible quality.Said that i’m using the preset at veryslow.(there is also placebo but the final video file is only 1% smaller in size).
And here is the command i use
ffmpeg
-y //overwrite the file if it exists
-i INPUTFILE // replace with the input file
-metadata title=THETITLE // set a nice title, visible on modern devices
-metadata date=THEDATE // set a nice title, visible on modern devices
-c:v libx264 // use the h264 codec
-crf 21 // try different numbers between 18-26
-preset veryslow // placebo,slow,fast,ultrafast==big file
-tune film // tune it a little
-pix_fmt yuv420p // preferred on most modern devices
-profile:v main // preferred on most modern devices
-level 3.1 // preferred on most modern devices
-refs 4 // preferred on most modern devices
-c:a libfdk_aac // use aac
-metadata:s:a language=eng // set a language, visible on modern devices
-b:a 128k // audio bitrate 128k is like mp3 192k
-ar 48000 // 44100 ... whatever
-ac 2 // audiochannels
-movflags +faststart //move the metadata in the front of the video so it loads faster
OUTPUTFILEsome camcorder clips with m2ts already have the avc/h264 compatible codec so i just copy the stream.
some have the ac3/dolby sorround audio. I convert the audio but keep the ac3 as second audio track mapping the ffmpeg streams.this allows me to watch the mp4 on browsers and mobile devices but i’m able to keep the surround sound to playback on some tv’s, advanced media players or devices like apple tv.not that i’m not happy with the speed (using quad core’s) but i recently read again about cuda opencl and there is also the simple fact that i’m not using other converters than ffmpeg since alot of time.
Is ffmpeg (with the setting i use) a good converter to keep the same video quality than the source reducing the space occupied by and average of 30-40% ?
Is GPU conversion really that bad (cuda .. testing a gtx970) ?
it would be nice to add some more speed to the conversions by using both the gpu and the cpu..but for my understanding they cannot work together ??? and using only gpu is a drastical quality loss...cpu si more precise, gpu is faster in calculation are too imprecise from what i read.. so expensive softwares use cuda only for preview purpose... right ?Is ffmpeg or another software compatible with CPU+GPU encoding ?
i really don’t remember where, but i read that the ffmpeg is not a good videoconverter.i’m really happy with the size/quality, i gained an average of 30% in space with no visible quality loss. With some extra parameters i can adjust some really old analog videos that are deinterlaced in a really bad way.
maybe i could gain more size/quality with another software ???
note : i like ffmpeg.it’s free and it has commandline so i can create my own interface with php html & js and use it on various machines without the need to install it in every device i use. i uplad the idevice clips directly to the ffmpeg server.
btw. : explain the downvotes...
EDIT :
@talonmies ...cuda tag removed :
http://www.nvidia.com/object/cuda_home_new.html
CUDA® is a parallel computing platform and programming model invented
by NVIDIA. It enables dramatic increases in computing performance by
harnessing the power of the graphics processing unit (GPU). With
millions of CUDA-enabled GPUs sold to date, software developers,
scientists and researchers are finding broad-ranging uses for GPU
computing with CUDA. Here are a few examples : - See more at :
http://www.nvidia.com/object/cuda_home_new.html#sthash.dEYaqae7.dpufisn’t cuda the programming model that a theoretical ffmpeg library should support to handle GPU encoding on nvidia cards like the gtx 970 ?? like the badaboom software http://www.geforce.com/games-applications/pc-applications/badaboom-media-converter.
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Playing 120fps in browser between original and re-made video, original is normal speed, new video is slo-mo
1er mars 2023, par Patrick VelliaI used my GoPro Hero10 to record at 4k 120fps on a green screen. This original video plays slo-mo in QuickTime but "normal" speed in the browser. I want it playing normal speed, and if end user wants to slow it down they have the extra frames for that to maintain clarity, which is why I record at 120.


I then used FFMPEG to create an image sequence of the video.


Then I ran Image Magic to create the transparent frames.


Then I put it back together with the following command for a HEVC mov file :


ffmpeg -r 120 -f image2 -i transparent/image_transparent_%08d.png -vcodec hevc_videotoolbox -crf 28 -alpha_quality 1 -tag:v hvc1 output.mov


I am still on an Intel MacBook Pro running FFMPEG 4.6 (as I've found 5+ was buggy with one of my commands a few months ago but can't remember which one, I think it was the videotoolbox).


The GoPro video has the following stream data as input to the FFMPEG :


Duration: 00:00:08.15, start: 0.000000, bitrate: 60160 kb/s
 Stream #0:0(eng): Video: hevc (Main) (hvc1 / 0x31637668), yuvj420p(pc, bt709), 3840x2160 [SAR 1:1 DAR 16:9], 59891 kb/s, 119.88 fps, 119.88 tbr, 120k tbn, 119.88 tbc (default)
 Metadata:
 creation_time : 2023-02-28T19:06:41.000000Z
 handler_name : GoPro H.265
 vendor_id : [0][0][0][0]
 encoder : GoPro H.265 encoder
 timecode : 19:05:32:105
 Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 189 kb/s (default)
 Metadata:
 creation_time : 2023-02-28T19:06:41.000000Z
 handler_name : GoPro AAC 
 vendor_id : [0][0][0][0]
 timecode : 19:05:32:105
 Stream #0:2(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
 Metadata:
 creation_time : 2023-02-28T19:06:41.000000Z
 handler_name : GoPro TCD 
 timecode : 19:05:32:105
 Stream #0:3(eng): Data: bin_data (gpmd / 0x646D7067), 76 kb/s (default)
 Metadata:
 creation_time : 2023-02-28T19:06:41.000000Z
 handler_name : GoPro MET 


Whereas the re-constructed video has the following data :


Duration: 00:00:08.13, start: 0.000000, bitrate: 763650 kb/s
 Stream #0:0: Video: hevc (Main) (hvc1 / 0x31637668), yuv420p(tv, progressive), 3840x2160 [SAR 1:1 DAR 16:9], 763696 kb/s, 120 fps, 120 tbr, 15360 tbn, 15360 tbc (default)
 Metadata:
 handler_name : VideoHandler
 vendor_id : FFMP
 encoder : Lavc58.134.100 hevc_videotoolbo


When this re-constructed video plays in the browser, it is in slow-mo and I need to set the playbackRate to 4.0 for it to play "normally".


Is there something I need to add to the video for the browser to play it at "normal" speed ?


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