I know how to use ffmpeg to covert image sequence to a video.
What I want to do is start converting images to video, before I have all the images ready, i.e. as soon as I start to output images, ffmpeg starts conversion, and stops when the images stop coming. Is there any way to achieve this?
Edit : I'm trying this in Android.
If you want to store video on sdcard, you should start with FFMpegFrameRecorder class from OpenCV for Android. You can google it easily. It will allow you to add single frames and create a video bit-by-bit.
If you need to keep your video in memory, you will have to write your own frame recorder, which is not that trivial, but doable and I can help you a bit.
Related
I am using below demo for creating slow and fast motion video in android application.
https://github.com/google/grafika
I am able to play slow and fast motion video in application but now i want to export this video to SD card.
I use TextureView to show video in app.
I use this java file to control speed of video.
https://github.com/google/grafika/blob/master/src/com/android/grafika/SpeedControlCallback.java
How can i do this?
any help will be appreciated.
Hi you have to use a MediaMuxer, call AddTrack for the video track and write the data to this track to the muxer after encoding each frame. You can see some examples in grafika page, one of them could be this: https://github.com/google/grafika/blob/master/src/com/android/grafika/ContinuousCaptureActivity.java (here you canhow to do both displaying on screen and recording on SD)
and another one: https://github.com/google/grafika/blob/master/src/com/android/grafika/CameraCaptureActivity.java
Also you can find more examples here:
http://www.bigflake.com/mediacodec/
Thanks
I am working on video processing app where i have to draw some shape on video like circle,line etc on video and save as mp4 file so when user play again video shows shapes as part of video, in sort i have to extract frames from video, modify them then replace the frames with edited frames.
Please let know how can i achieve this using without third party library or with it.
Thanks in advance
Is it possible to create video of series of Images present on SdCard using MediaCodec? if yes, can anyone share me the link?
I want to import images from sdCard and create video from those images, any suggestions???
I want to do this programmatically. I've tried using jcodec library but the process is very slow and I want to fasten up a little bit more.
Is there any chances that MediaCodec can do that in my ADT and in much faster way.
Importing images from SdCard --> making a good quality .mp4 video (faster than jcodec way).
You can try INDE Media Pack - https://software.intel.com/en-us/articles/intel-inde-media-pack-for-android-tutorials
It has transcoding\remuxing functionality as MediaComposer class and several sample effects like JpegSubstituteEffect - it shows how substitute video frame by a picture from jpg file. You can take black video as a refefence and put images on it with a possibility to set duration, add audio track with help of audio effect etc.
I am using external camera with my application. The camera takes 9 pictures every second (9fps). The pictures are bitmaps 384x288. I need to create from this pictures a video file.
What I have tried:
Using Jcodec
The problem: jcodec is relatively slow, and for it to work properly i add the bitmaps to ArrayList and when the record stopped i convert the array to video. I takes to much time. For 30 sec video there is about 1 min rendering time.
Using native mediaCodec
The problem: I could only generate AVI files (video/avc) that not readable in the original android player. I can not use what is written here: http://bigflake.com/mediacodec/ because I developing for API 16. I have tried using (video/mp4v-es) but the video is corrupted and not playable in any player.
Using FFmpeg
The problem: Very complicated to implement in android, and I am not sure it will give me the result I needed after spending time to implement this. The result I need is to record video streaming as I get the bitmap without any delay.
What can you suggest me?
How can I put text or transparent image into a video? I can display text overlayed camera output but how can I record it? Using opencv is an alternative but I don't really want to use opencv manager(or 25+ mb binary).
Is there a way to record overlayed video with Android SDK or 3rd party library. What are my options?
Update: I'm not looking for a "record to disc then load recorded video and process every frame" solution. I'm trying to find a way to process every camera frames before recording. Something like opencv.
You can get help from here to get video byes array of each frame from camera and then save them using some third party encoder. Now you can create bitmap from byte array, and using bitmap you can write a overlay text on it. Example code here and here is the link for the third party encoder AndroidFFmpeg