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Sur d’autres sites (6161)

  • Mixing audio(aac) and video (h.264 in mp4 container) and write to mp4 container using Xuggler

    25 novembre 2015, par Handroid

    Here is the code I am using

        String filenamevideo = videoFilePath;(video.mp4)
    

    
    String filenameaudio = audioAACFilePath; (audio.aac)
    

    

    

    
    IMediaWriter mWriter = ToolFactory.makeWriter(videoWithAudioFilePath); // output
    
    // file
    

    
    IContainer containerVideo = IContainer.make();
    
    IContainer containerAudio = IContainer.make();
    

    
    if (containerVideo.open(filenamevideo, IContainer.Type.READ, null) < 0)
    
        throw new IllegalArgumentException("Cant find " + filenamevideo);
    

    
    if (containerAudio.open(filenameaudio, IContainer.Type.READ, null) < 0)
    
        throw new IllegalArgumentException("Cant find " + filenameaudio);
    

    
    int numStreamVideo = containerVideo.getNumStreams();
    
    int numStreamAudio = containerAudio.getNumStreams();    
    

    
    int videostreamt = -1; // this is the video stream id
    
    int audiostreamt = -1;
    

    
    IStreamCoder videocoder = null;
    

    
    for (int i = 0; i < numStreamVideo; i++) {
    
        IStream stream = containerVideo.getStream(i);
    
        IStreamCoder code = stream.getStreamCoder();
    

    
        if (code.getCodecType() == ICodec.Type.CODEC_TYPE_VIDEO) {
    
            videostreamt = i;
    
            videocoder = code;
    
            break;
    
        }
    

    
    }
    

    
    for (int i = 0; i < numStreamAudio; i++) {
    
        IStream stream = containerAudio.getStream(i);
    
        IStreamCoder code = stream.getStreamCoder();
    

    
        if (code.getCodecType() == ICodec.Type.CODEC_TYPE_AUDIO) {
    
            audiostreamt = i;
    
            break;
    
        }
    

    
    }
    

    
    if (videostreamt == -1)
    
        throw new RuntimeException("No video steam found");
    
    if (audiostreamt == -1)
    
        throw new RuntimeException("No audio steam found");
    

    
    if (videocoder.open() < 0)
    
        throw new RuntimeException("Cant open video coder");
    
    IPacket packetvideo = IPacket.make();
    

    
    IStreamCoder audioCoder = containerAudio.getStream(audiostreamt).getStreamCoder();
    

    
    if (audioCoder.open() < 0)
    
        throw new RuntimeException("Cant open audio coder");
    

    
    mWriter.addAudioStream(0, 0, ICodec.ID.CODEC_ID_AAC, audioCoder.getChannels(),audioCoder.getSampleRate());
    

    
    mWriter.addVideoStream(1, 0, ICodec.ID.CODEC_ID_H264, videocoder.getWidth(), videocoder.getHeight());
    

    

    
    IPacket packetaudio = IPacket.make();
    

    
    while (containerVideo.readNextPacket(packetvideo) >= 0 || containerAudio.readNextPacket(packetaudio) >= 0) {
    

    
        if (packetvideo.getStreamIndex() == videostreamt) {
    

    
            // video packet
    
            IVideoPicture picture = IVideoPicture.make(videocoder.getPixelType(), videocoder.getWidth(),
    
                    videocoder.getHeight());
    
            int offset = 0;
    
            while (offset < packetvideo.getSize()) {
    
                int bytesDecoded = videocoder.decodeVideo(picture, packetvideo, offset);
    
                if (bytesDecoded < 0)
    
                    throw new RuntimeException("bytesDecoded not working");
    
                offset += bytesDecoded;
    
                if (picture.isComplete()) {
    
                    // System.out.println(picture.getPixelType());
    
                    mWriter.encodeVideo(1, picture);
    
                }
    
            }
    
        }
    

    
        if (packetaudio.getStreamIndex() == audiostreamt) {
    
            // audio packet
    
            IAudioSamples samples = IAudioSamples.make(512, audioCoder.getChannels(), IAudioSamples.Format.FMT_S32);
    
            int offset = 0;
    
            while (offset < packetaudio.getSize()) {
    
                int bytesDecodedaudio = audioCoder.decodeAudio(samples, packetaudio, offset);
    
                if (bytesDecodedaudio < 0)
    
                    throw new RuntimeException("could not detect audio");
    
                offset += bytesDecodedaudio;
    
                if (samples.isComplete()) {
    
                    mWriter.encodeAudio(0, samples);
    
                }
    
            }
    

    
        }           
    
    }

    The output file (mp4) is generating , but unable to play it using (vlc) and in JavaFX scene media.

    Please help me with the inputs on the above code I’m using it in a correct way (Or) help me with the possible solution for mixing audio(aac) and video(h264) to mp4 container.

    Thank in advance.

  • cv2.VideoCapture on python

    27 décembre 2015, par pandasarebest

    I am running the following code :

    import numpy as np
    
import cv2
    
import os
    

    
count = 0
    

    
cap = cv2.VideoCapture("/home/simon/PROJECT/real_data/00000020.mp4")
    

    
while not cap.isOpened():
    
    cap = cv2.VideoCapture("./00000020.mp4")
    
    cv2.waitKey(1000)
    
    print "Wait for the header"
    

    
pos_frame = cap.get(cv2.cv.CV_CAP_PROP_POS_FRAMES)
    
while True:
    
    flag, frame = cap.read()
    
    if flag:
    
        # The frame is ready and already captured
    
        cv2.imshow('video', frame)
    
        pos_frame = cap.get(cv2.cv.CV_CAP_PROP_POS_FRAMES)
    
        print str(pos_frame)+" frames"
    
    else:
    
        # The next frame is not ready, so we try to read it again
    
        cap.set(cv2.cv.CV_CAP_PROP_POS_FRAMES, pos_frame-1)
    
        print "frame is not ready"
    
        # It is better to wait for a while for the next frame to be ready
    
        cv2.waitKey(1000)
    

    
    if cv2.waitKey(10) & 0xFF == 27:
    
        break
    
    if cap.get(cv2.cv.CV_CAP_PROP_POS_FRAMES) ==       cap.get(cv2.cv.CV_CAP_PROP_FRAME_COUNT):
    
    # If the number of captured frames is equal to the total number of frames,
    
    # we stop
    
    break
    

    

    
if ret == True:
    
    frame = cv2.VideoCapture.grab()
    
    frame = 'frame%d' % count 
    

    
    cv2.imwrite('frame%d.png', frame)
    

    
    count += 1
    
else:
    
    print 'stopped at' + count
    
    break

    And whenever I run it, it loops on the while not loop, printing "wait for header".
    There is never an error code or anything like that either.

    I have tried to run it as a more simple piece of code, where it doesnt have all these checks, and again that doesn’t throw any errors.

    I am attempting to run this code to open a video, and then save the frames as png files throughout the video.

    Does anyone spot any particular problems with the code ?
    Or alternatively does anyone know a piece of code that would do what i want more efficiently, as I have trawled through google searches and stack overflow a lot recently and haven’t found anything

    Thanks in advance
    Panda

  • Merging audio(aac) and video (h.264 in mp4 container) into a mp4 container using Xuggler

    26 août 2016, par Handroid

    Here is the code I am using

        String filenamevideo = videoFilePath;(video.mp4)
    

    
    String filenameaudio = audioAACFilePath; (audio.aac)
    

    

    

    
    IMediaWriter mWriter = ToolFactory.makeWriter(videoWithAudioFilePath); // output
    
    // file
    

    
    IContainer containerVideo = IContainer.make();
    
    IContainer containerAudio = IContainer.make();
    

    
    if (containerVideo.open(filenamevideo, IContainer.Type.READ, null) < 0)
    
        throw new IllegalArgumentException("Cant find " + filenamevideo);
    

    
    if (containerAudio.open(filenameaudio, IContainer.Type.READ, null) < 0)
    
        throw new IllegalArgumentException("Cant find " + filenameaudio);
    

    
    int numStreamVideo = containerVideo.getNumStreams();
    
    int numStreamAudio = containerAudio.getNumStreams();    
    

    
    int videostreamt = -1; // this is the video stream id
    
    int audiostreamt = -1;
    

    
    IStreamCoder videocoder = null;
    

    
    for (int i = 0; i < numStreamVideo; i++) {
    
        IStream stream = containerVideo.getStream(i);
    
        IStreamCoder code = stream.getStreamCoder();
    

    
        if (code.getCodecType() == ICodec.Type.CODEC_TYPE_VIDEO) {
    
            videostreamt = i;
    
            videocoder = code;
    
            break;
    
        }
    

    
    }
    

    
    for (int i = 0; i < numStreamAudio; i++) {
    
        IStream stream = containerAudio.getStream(i);
    
        IStreamCoder code = stream.getStreamCoder();
    

    
        if (code.getCodecType() == ICodec.Type.CODEC_TYPE_AUDIO) {
    
            audiostreamt = i;
    
            break;
    
        }
    

    
    }
    

    
    if (videostreamt == -1)
    
        throw new RuntimeException("No video steam found");
    
    if (audiostreamt == -1)
    
        throw new RuntimeException("No audio steam found");
    

    
    if (videocoder.open() < 0)
    
        throw new RuntimeException("Cant open video coder");
    
    IPacket packetvideo = IPacket.make();
    

    
    IStreamCoder audioCoder = containerAudio.getStream(audiostreamt).getStreamCoder();
    

    
    if (audioCoder.open() < 0)
    
        throw new RuntimeException("Cant open audio coder");
    

    
    mWriter.addAudioStream(0, 0, ICodec.ID.CODEC_ID_AAC, audioCoder.getChannels(),audioCoder.getSampleRate());
    

    
    mWriter.addVideoStream(1, 0, ICodec.ID.CODEC_ID_H264, videocoder.getWidth(), videocoder.getHeight());
    

    

    
    IPacket packetaudio = IPacket.make();
    

    
    while (containerVideo.readNextPacket(packetvideo) >= 0 || containerAudio.readNextPacket(packetaudio) >= 0) {
    

    
        if (packetvideo.getStreamIndex() == videostreamt) {
    

    
            // video packet
    
            IVideoPicture picture = IVideoPicture.make(videocoder.getPixelType(), videocoder.getWidth(),
    
                    videocoder.getHeight());
    
            int offset = 0;
    
            while (offset < packetvideo.getSize()) {
    
                int bytesDecoded = videocoder.decodeVideo(picture, packetvideo, offset);
    
                if (bytesDecoded < 0)
    
                    throw new RuntimeException("bytesDecoded not working");
    
                offset += bytesDecoded;
    
                if (picture.isComplete()) {
    
                    // System.out.println(picture.getPixelType());
    
                    mWriter.encodeVideo(1, picture);
    
                }
    
            }
    
        }
    

    
        if (packetaudio.getStreamIndex() == audiostreamt) {
    
            // audio packet
    
            IAudioSamples samples = IAudioSamples.make(512, audioCoder.getChannels(), IAudioSamples.Format.FMT_S32);
    
            int offset = 0;
    
            while (offset < packetaudio.getSize()) {
    
                int bytesDecodedaudio = audioCoder.decodeAudio(samples, packetaudio, offset);
    
                if (bytesDecodedaudio < 0)
    
                    throw new RuntimeException("could not detect audio");
    
                offset += bytesDecodedaudio;
    
                if (samples.isComplete()) {
    
                    mWriter.encodeAudio(0, samples);
    
                }
    
            }
    

    
        }           
    
    }

    The output file (mp4) is generating , but unable to play it using (vlc) and in JavaFX scene media.

    Please help me with the inputs on the above code I’m using it in a correct way (Or) help me with the possible solution for merging audio(aac) and video(h264) to mp4 container.

    Thank in advance.

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