I debugged libde265.js on my iPhone 4s and was wondering why i can´t see HEVC content, cause it worked fine under iOS with my iPad AIR, both devices were running iOS 7.1.

The safari debugger brings light on this, i added a console.log output to my iOS Safari browser (iPhone 4s):

[Log] 268435456 (libde265.js, line 1085)

RangeError: ArrayBuffer size is not a small enough positive integer. anonyme Funktion) (libde265.js, line 1087)

It seems an error in sizeof the buffer array near (Searched for "Initialize the runtime's memory in libde265.js- cause the debugger doenst show the right line number as my javscript IDE") - i founded it and showed me these lines of code where i add the console.log(TOTAL_MEMORY) to see why we have this size Array error, see:

// Initialize the runtime's memory
// check for full engine support (use string 'subarray' to avoid closure compiler confusion)
assert(typeof Int32Array !== 'undefined' && typeof Float64Array !== 'undefined' && !!(new Int32Array(1)['subarray']) && !!(new Int32Array(1)['set']),
'JS engine does not provide full typed array support');
console.log(TOTAL_MEMORY);
var buffer = new ArrayBuffer(TOTAL_MEMORY);

So TOTAL_MEMORY seems to be 268435456, and that is too high value for the new ArrayBuffer.

I do not know if this is fixable, cause the generated code is done by emscripten i think.

What do you think?

Gary

While trying to decode an heic picture coming from an iPhone X I am getting this error:

hevc-decoder.js:166 coded parameter out of range

In this case, code is 8.

I am using Nokia's decoder which in turn uses libde265.js.

See nokiatech/heif#33

Following errors occurred during compilation of library with emscripten,

emsdk-master/fastcomp/emscripten/system/include/libcxx/memory:2148:9: error:
cannot initialize a member subobject of type 'int *' with an rvalue of
type 'long'
: _value(_VSTD::forward<_Up>(__u))
^ ~~~~~~~~~~~~~~~~~~~~~~~~

emsdk-master/fastcomp/emscripten/system/include/libcxx/memory:2148:9: error:
cannot initialize a member subobject of type 'option_base **' with an
rvalue of type 'long'
: _value(_VSTD::forward<_Up>(__u))
^ ~~~~~~~~~~~~~~~~~~~~~~~~

emsdk-master/fastcomp/emscripten/system/include/libcxx/memory:2148:9: error:
cannot initialize a member subobject of type 'std::__2::basic_string
*' with an rvalue of type 'long'
: _value(_VSTD::forward<_Up>(__u))
^ ~~~~~~~~~~~~~~~~~~~~~~~~

emsdk-master/fastcomp/emscripten/system/include/libcxx/memory:2251:9: error:
no matching constructor for initialization of
'__compressed_pair_elem<std::__2::basic_string *, 0>'
: _Base1(std::forward<_U1>(__t1)), _Base2(std::forward<_U2>(__t2)) {}
^ ~~~~~~~~~~~~~~~~~~~~~~~

emsdk-master/fastcomp/emscripten/system/include/libcxx/memory:2241:9: error:
no matching constructor for initialization of
'__compressed_pair_elem<std::__2::basic_string *, 0>'
: _Base1(std::forward<_Tp>(__t)), _Base2() {}
^ ~~~~~~~~~~~~~~~~~~~~~~

emsdk-master/fastcomp/emscripten/system/include/libcxx/memory:2251:9: error:
no matching constructor for initialization of
'__compressed_pair_elem<option_base **, 0>'
: _Base1(std::forward<_U1>(__t1)), _Base2(std::forward<_U2>(__t2)) {}
^ ~~~~~~~~~~~~~~~~~~~~~~~

attached the complete logs of build.sh
libde265_build_logs.txt

Please check the attached log file for the above mentioned errors.

Thanks in advance

(3660299696781)//,this id card details with id card, issues and expire date show.

Currently we have a huge big source file, it is difficult to read and maintain. Is it possible we split it into different modules (maybe as a npm module)?
I am asking this because I only need the Decoder feature of this library. I am using webpack as build tool

can i play the h265 live stream ?

How to perform playing, pausing and seeking of video in libde265.RawPlayer?

hello, it can't play H265 mp4 file. Any update to work with that type?

Hi ,

I have download your demo, and run it on local server, it works well.
Great job, Thank you.

But I think this lib is very big, the min file almost 800k, And the js file is creating by Emscripten, it added some additional codes to lib. Do you have other version lib for javascript?

And I want change the video file in demo, it throws an error like issue#2: #2

Thanks for your working.
David

Hi,

Is it possible to play live streams using this library?

Thanks,
Yaron T.

What should be the ffmpeg encoding parameters for a video to make it compatible with libde264.js?

Hi, this is a nice library to decode H265, however it was built many years ago, so it is not suit for present times, it lacks of some features like rendering into WebGL, decoding with WebAssembly, please update the new version. Thanks.

can't find seek function

end line 22 this.Ea=new Worker(ab);
SCRIPT5022: SecurityError

URL-address of at least one BLOB-object revoked by closing BLOB-object for which it was created. Such URL-addresses will not be resolved, as data associated with them have been released.

I tried to set
video.crossOrigin = 'anonymous'
but it didn’t help.
CORS error?

So, video does not play.

Libde265 could not support seek

Hello,

How did you encode the sample hevc file? I generated a couple of files using f265. If I bundle these in a matroska file they play happily in your chrome app, however the raw hevc does not play in libde265.js. Instead I get a hissy screen reminiscent of old analogue TVs when they were out of tune.

I was concerned that perhaps my emscripten build was borked so I downloaded libde265.js and your sample video from your demo site. I can play your video that way but not my own.

Best wishes, Max

In the source code I see you push 4096 bytes to decoder each time. I'm now using libde265.js to do streaming and instead of 4096bytes I use the data that the server side send me every time to feed the decoder. The length of the data I received is the size of a frame, thus it may be variant, sometimes large while sometimes very small. I think most of the time the data size is smaller than 4096 bytes. Then I call decoder.push_data() and decoder.decode() per frame, which is very frequent.

Is this why it causes some latency and I feel lag when I do other things in javascript such as tracking my mouse position? I don't know if I need to wait the received data size to be larger than 4096 bytes and then do decode() once, since it could also causes some 'waiting time' to reach the chunk size.

I use websocket to send and receive H265 frames. Monitor the onmessage event, when frame comes, function decode will be called. But in this way, the video has a long latency, and data sending also be blocked.
How to fix it? Do I need to use webworker to get smooth video?

Hi @strukturag-service first of all thanks for this repo it is great.

Here, I need to trim a video using start and end point. Is it possible in this js ?

i need to find a way to control the speed of the video. not just as fast as possible.

hi, is there a way to support decoding of a stream?
i want to encode a video stream using avconv. i transport the output to the browser using stdout and socket.io.

a demo what i am doing can be watched here:
https://www.youtube.com/watch?v=nDuHEMA5uSw

is it possible to use the libde265 for this purpouse?
thx

i study a lot your libde.265.js and really like the idea a lot. I generated one I-Frame only hevc file that i tried to decode and display in the video canvas.

I saw that the libde gets enough data to decode this one intra-frame, no error callback was called. the generated image never displays, and image

ing = get_next_picutre....always show a false boolean value in the function before the display image is called.

When i generated a second of 24 hevc frames (one I,P,B) , then the decoder is able to display these frames as one shot.

I packed the one intra hevc only file in a zip file and upload it for your download.

Is it possible to decode only one intra frame with libde265.js?
http://rebotnix.com/temp/one_intra.hevc.zip

I know you haven't implemented 10 bit yuv420 to rgb yet so I tried implementing it myself. I noticed the Y U and V arrays are from 0 to 255 but thats not 10 bit. I figured it out, it was cake xD

HVC1 belongs to HEVC, right?
（Thank you）

Has anyone used this with HLS streams?