Why the video file can't play on my android phone?

[ghost]

I had created a Mp4 file by using SequenceEncoder.java, but it can't play on my android phone .It just can play on my computer.

[sokishan4u]

i can only see the black screen in the video plz help thankx

[svitvitskiy]

Could you post the device name/sw version?

[coralinejones1985]

I ran into the same problem: I can view video on PC only. Emulator shows only one rotated image of all sequence and closes video.

[svitvitskiy]

Could you please attach a sample code, your input file and the output file? This would help me a lot to reproduce and fix the problem. Thanks in advance.

[coralinejones1985]

SequenceEncoder sequenceEncoder = new SequenceEncoder(SDPathToFile("", "out2.mp4"));
for (int i = 0; i < imagePathList.size(); i++) {
String path = getPath(context, Uri.parse(imagePathList.get(i)));
sequenceEncoder.encodeImage(BitmapFactory.decodeFile(path, null));
}
sequenceEncoder.finish();

I use images from external directory as input files.

[coralinejones1985]

out2.mp4.zip

here's my out put

[coralinejones1985]

I also use this code and it gives the same result:

try {
int timescale = 25;
SeekableByteChannel channel = NIOUtils.writableFileChannel(SDPathToFile("", "out2.mp4"));
MP4Muxer muxer = new MP4Muxer(channel, Brand.MP4);
FramesMP4MuxerTrack outTrack = muxer.addTrack(TrackType.VIDEO, timescale);
H264Encoder encoder = new H264Encoder();
ByteBuffer outBuffer = ByteBuffer.allocate(640 * 480 * 6);

        ArrayList<ByteBuffer> spsList = new ArrayList<>();
        ArrayList<ByteBuffer> ppsList = new ArrayList<>();

        for (int i = 0; i < imagePathList.size(); i++) {
            String path = getPath(context, Uri.parse(imagePathList.get(i)));
            Bitmap bitmap = BitmapFactory.decodeFile(path, null);

            Picture rgbPicture = BitmapUtil.fromBitmap(bitmap);
            Picture yuvPicture = Picture.create(rgbPicture.getWidth(),
                    rgbPicture.getHeight(), encoder.getSupportedColorSpaces()[0]);

            Transform transform = ColorUtil.getTransform(
                    ColorSpace.RGB, encoder.getSupportedColorSpaces()[0]);
            transform.transform(rgbPicture, yuvPicture);

            ByteBuffer result = encoder.encodeFrame(yuvPicture, outBuffer);
            outBuffer.clear();

            spsList.clear();
            ppsList.clear();
            H264Utils.wipePS(result, spsList, ppsList);
            H264Utils.encodeMOVPacket(result);

            outTrack.addFrame(new MP4Packet(result, i * 2, timescale, 1, i, true, null, i * 2, 0));
            Log.d(TAG, "Processed " + (i + 1) + " images");
        }

        outTrack.addSampleEntry(H264Utils.createMOVSampleEntry(spsList, ppsList, 4));
        muxer.writeHeader();
        NIOUtils.closeQuietly(channel);
    } catch (Exception e) {
        e.printStackTrace();
    }

[coralinejones1985]

Can you help me figure out what went wrong?..

[svitvitskiy]

Sure, just couldn't get around to doing it earlier.

Stan

On Tuesday, January 19, 2016, Кристина notifications@github.com wrote:

Can you help me figure out what went wrong?..

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Reply to this email directly or view it on GitHub
#62 (comment).

[svitvitskiy]

I can see VLC is not playing the file even after the remuxing so I suspect
it doesn't understand a particular "flavor" of h.264 that I am using right
now (CAVLC baseline profile).

I'll try to see if CABAC would fix this problem.

On Tue, Jan 19, 2016 at 12:55 PM, Stanislav Vitvitskiy <
stanislav.vitvitskiy@gmail.com> wrote:

Sure, just couldn't get around to doing it earlier.

Stan

On Tuesday, January 19, 2016, Кристина notifications@github.com wrote:

Can you help me figure out what went wrong?..

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#62 (comment).

[coralinejones1985]

This library is great and easy. So I'm looking forward to see solution :)

[coralinejones1985]

@svitvitskiy I'm sorry for bothering you, but I really need to know when you're planning to do this fix?

[svitvitskiy]

Hi,

Thank you so much for your patience.

I will be looking at the problem next week.

I'll let you know.

Stan

On Thu, Feb 25, 2016 at 9:28 PM, Кристина notifications@github.com wrote:

@svitvitskiy https://github.com/svitvitskiy I'm sorry for bothering
you, but I really need to know when you're planning to do this fix?

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#62 (comment).

[svitvitskiy]

Your video has only 3 frames, so at 25fps this really does seem like it shows the first frame and then the player just closes. I conclude that this is the intended behavior.

However I am guessing you might have a slideshow video in mind. In that case you would want your frames to stay on screen longer. If this is what you want, here's how you can make a slideshow video:

AndroidSequenceEncoder8Bit encoder = new AndroidSequenceEncoder8Bit(out, Rational.R(1, 4));
...

Here you are saying the duration of each frame will be 4 seconds or in other words fps would be 1/4 frames per second.

To use this you'd have to use the latest jcodec from HEAD.

[coralinejones1985]

Thank you, I'll try it and give you feedback :) I guess, I should fork your project?

[svitvitskiy]

Well, you just clone it and build locally since the version 0.2.0 has not
been released yet.

On Tue, Mar 8, 2016 at 5:47 AM, Кристина notifications@github.com wrote:

Thank you, I'll try it and give you feedback :) I guess, I should fork
your project?

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#62 (comment).

[coralinejones1985]

The same.. Maybe I do something wrong? I want one image to be shown per half a second, but there's only one image shows up and video closes.
SeekableByteChannel channel = NIOUtils.writableChannel(SDPathToFile("", APP_NAME + "." + FORMAT));
AndroidSequenceEncoder8Bit encoder8Bit = new AndroidSequenceEncoder8Bit(channel, Rational.R(1, 5));
for (int i = 0; i < imageUriList.size(); i++) {
String path = getPath(context, Uri.parse(imageUriList.get(i)));
encoder8Bit.encodeImage(BitmapFactory.decodeFile(path, null));
if (i == imageUriList.size() - 1) {
encoder8Bit.encodeImage(BitmapFactory.decodeFile(path, null));
}
Log.d(TAG, "Processed " + (i + 1) + " images");
}
encoder8Bit.finish();

[coralinejones1985]

I noticed that it works only on Murshmallow..that is wierd. I mean, video makes on every version, plays only on Murshmallow, but not on another versions.

[coralinejones1985]

Also videoPlays on 5.1.1 version, but not below..