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Sur d’autres sites (10211)
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javacv FFMPEG decode memory leak ?
25 mars 2015, par Liquan NieI’m new to JAVACV and I am using FFMPEG to play some video file as follows
My enviroument is windows 8 with jdk7 and javacv0.10.String file_path ="D:\\1.mp4";
// regist all format and codec
avformat.av_register_all();
avcodec.avcodec_register_all();
// open file
avformat.AVFormatContext avFormatCtx = avformat.avformat_alloc_context();
if (avformat.avformat_open_input(avFormatCtx, file_path, null, null) != 0)
{
System.out.println("cann't open file\r\n");
return;
}
// find stream info
if (avformat.avformat_find_stream_info(avFormatCtx, (AVDictionary)null) < 0)
{
System.out.println("can't find stream info\r\n");
return;
}
int videoIndex = -1;
for(int i=0; i< avFormatCtx.nb_streams();i++)
{
if(avFormatCtx.streams(i).codec().codec_type() == avutil.AVMEDIA_TYPE_VIDEO)
{
videoIndex = i;
}
}
// determ codec
avcodec.AVCodecContext avCodecCtx = avFormatCtx.streams(videoIndex).codec();
avcodec.AVCodec codec = avcodec.avcodec_find_decoder(avCodecCtx.codec_id());
if (codec == null)
{
System.out.println("codec not found");
return;
}
if(avcodec.avcodec_open2(avCodecCtx, codec, (AVDictionary)null) < 0)
{
System.out.println("cann't open avcodec\r\n");
}
avutil.AVFrame frame = avcodec.avcodec_alloc_frame();
avutil.AVFrame frameRGB = avcodec.avcodec_alloc_frame();
int numByte = avcodec.avpicture_get_size(avutil.AV_PIX_FMT_RGB24, avCodecCtx.width(), avCodecCtx.height());
Pointer outBuffer = avutil.av_malloc(numByte);
avcodec.avpicture_fill(new AVPicture(frameRGB), outBuffer.asByteBuffer(), avutil.AV_PIX_FMT_RGB24, avCodecCtx.width(), avCodecCtx.height());
avformat.av_dump_format(avFormatCtx, 0, file_path, 0);
System.out.println(avFormatCtx.duration());
SwsContext img_convert_ctx = swscale.sws_getContext(avCodecCtx.width(), avCodecCtx.height(), avCodecCtx.pix_fmt(), avCodecCtx.width(), avCodecCtx.height(), avutil.AV_PIX_FMT_RGB24, swscale.SWS_BICUBIC, null, null, (double[])null);
AVPacket pkt = new AVPacket();
int y_size = avCodecCtx.width()*avCodecCtx.height();
avcodec.av_new_packet(pkt, y_size);
opencv_highgui.cvNamedWindow(WINDOW_NAME);
IplImage showImage = opencv_core.cvCreateImage(opencv_core.cvSize(avCodecCtx.width(), avCodecCtx.height()), opencv_core.IPL_DEPTH_8U, 3);
// read frames loop
int frameNumbers = avformat.av_read_frame(avFormatCtx, pkt);
System.out.println("frame number is "+frameNumbers);
while (avformat.av_read_frame(avFormatCtx, pkt) >= 0)
{
//System.out.println(pkt.asByteBuffer());
if (pkt.stream_index() == videoIndex)
{
IntPointer ip = new IntPointer();
int ret = avcodec.avcodec_decode_video2(avCodecCtx, frame, ip, pkt);
if (ret < 0)
{
System.out.println("codec error\r\n");
return;
}
if (ip.get()!= 0)
{
swscale.sws_scale(img_convert_ctx, frame.data(), frame.linesize(), 0, avCodecCtx.height(), frameRGB.data(), frameRGB.linesize());
showImage.imageData(frameRGB.data(0));
showImage.widthStep(frameRGB.linesize().get(0));
opencv_highgui.cvShowImage(WINDOW_NAME, showImage);
opencv_highgui.cvWaitKey(25);
}
}
}
showImage.release();
opencv_highgui.cvDestroyWindow(WINDOW_NAME);
avutil.av_free(frameRGB);
avcodec.avcodec_close(avCodecCtx);
avformat.avformat_close_input(avFormatCtx);but i run into get this error
# A fatal error has been detected by the Java Runtime Environment:
#
# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x00000000767c35ed, pid=11884, tid=3960
#
# JRE version: 7.0_13-b20
# Java VM: Java HotSpot(TM) 64-Bit Server VM (23.7-b01 mixed mode windows-amd64 compressed oops)
# Problematic frame:
# C [avcodec-56.dll+0x4835ed] avcodec_decode_video2+0xbd
#
# Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
#
# An error report file with more information is saved as:
# E:\code\android\TestJAVACV\hs_err_pid11884.log
#
# If you would like to submit a bug report, please visit:
# http://bugreport.sun.com/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'D:\1.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
creation_time : 1970-01-01 00:00:00
encoder : Lavf53.29.100
Duration: 00:08:30.27, start: 0.000000, bitrate: 160 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 960x540 [SAR 1:1 DAR 16:9], 28 kb/s, 15 fps, 15 tbr, 15 tbn, 30 tbc (default)
Metadata:
creation_time : 1970-01-01 00:00:00
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 127 kb/s (default)
Metadata:
creation_time : 1970-01-01 00:00:00
handler_name : SoundHandlerand in the log file i found that the enden space heap in jvm has been used 98%. but I don’t know where is the issue, since the document of ffmpeg is not that enough, I feel difficult to know more about how to use it well ,any suggestions ??
Heap
PSYoungGen total 23872K, used 20250K [0x00000000e5600000, 0x00000000e70a0000, 0x0000000100000000)
eden space 20480K, 98% used [0x00000000e5600000,0x00000000e69c69f8,0x00000000e6a00000) -
QSV on Debian 11 can`t compile for right work [closed]
8 avril 2022, par woodsleafHave I tried to solve this problem, but all that happened was to output a line in ffmpeg about the presence of QSV(qsync), but not to make it work in "encode" mode.
Environment:Debian 11(bullseye), Cpu i5-3570k (Intel® HD Graphics 4000). Hardware codec support Decode/Encode : H264, AVC.


Hardware Video Acceleration, ffmpeg src, HandBrake.


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ffmpeg : handle errors in print_sdp()
4 décembre 2021, par Anton Khirnov