Newest 'x264' Questions - Stack Overflow

http://stackoverflow.com/questions/tagged/x264

Les articles publiés sur le site

  • Upgrading an existing h.264 solution of Level-4.1 to support 4K(Level-5.2)

    11 août 2015, par Codec Guy

    I am currently studying to support 4K(3840x2160) on H.264 Encoder. When I studied the specs of H.264, it says 4K resolution is supported in Level-5.2(XAVC). In order to check the implementation I encoded my full HD(1920x1080)bitstream using x264 in FFMPEG for three different levels(Level-4,4.1 and 5.2).

    Here is what I noticed - All the three Encoded bitstreams, encoded for different levels matched pixel by pixel. - I was wondering if the encoding is done for different levels(Level-4,4.1 and 5.2), how come there is no change in bitstream.

    • I have a solution of high 422 Level-4.1, are there any changes in the core modules like Transformation, Quantazition, CAVLC to support 4K(3840 x 2160)/XAVC.

    • or the processing of all Level-5.2 is same as Level-4.1.

    It would be very helpful, if somebody can refer me to any documents which explains the diffrence in processing of H.264/AVC and XAVC

  • Encoding IPIPIP Frames from x264 baseline 420 profile [duplicate]

    5 août 2015, par Codec Guy

    This question already has an answer here:

    I am new to FFMPEG. I am trying encode a stream in alternate I-Frames and P-Frames for the baseline profile IPIPIPIPIP.

    I searched FFMPEG forums but was not able to get the required output

    My script file:

    export LD_LIBRARY_PATH=:./FFMPEGEncLibs
./ffmpegEnc -f rawvideo -r 25 -s 176x144 -vcodec rawvideo -i ./encIn/akiyo_qcif.yuv -c:v libx264 -x264-params cabac=0:8x8dct=0 -pix_fmt yuv420p -profile:v baseline -level 4.1 -psnr -intra -qp 9 -vframes 10 ./encOut/akiyo_cif.h264

    Can someone suggest me changes to my script file, so that i would be able to encode in stream in IPIPIP format

    Thanks in advance

  • FFMPEG undefined reference to `x264_encoder_open_146'

    27 juillet 2015, par lakshmikandan

    When configuring FFMPEG with below modules show error,

    # ./configure  --enable-shared --enable-shared --enable-nonfree --enable-gpl --enable-pthreads --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfaac --enable-libmp3lame --enable-libtheora --enable-libvorbis --extra-libs=-lx264 --enable-libxvid --extra-cflags=-I/usr/local/cpffmpeg/include/ --extra-ldflags=-L/usr/local/cpffmpeg/lib --enable-version3 --extra-version=syslin --enable-libass --enable-libvpx --enable-zlib --extra-ldflags=-L/usr/local/lib --enable-libx264

    CC ffmpeg_filter.o LD ffmpeg_g libavcodec/libavcodec.so: undefined reference to `x264_encoder_open_146' collect2: ld returned 1 exit status make: **** [ffmpeg_g] Error 1

    I found the lib files,

    #  ls  /usr/local/lib | grep libx264
libx264.a
libx264.so@
libx264.so.144*
libx264.so.146*

    How to fixed it.?

  • Red5 Server Recording issue

    23 juillet 2015, par Parul Sharma

    I am Trying to publishing a rtmp stream encoded with x264 Lib. the stream is recording but I am trying to connect a flash client to play this stream the stream is not working many times but when I am finishing the recording and try to connect this stream the stream is wirking well. Can any body help Me . My media server is Red 5 Server. I am using the Java based Recording Client. And the Player is based on Flash.

  • java processbuilder x264.exe

    23 juillet 2015, par Pa Rö

    i want encoding a video with the x264 out of my own java application.

    the problem is that the x264.exe start to work, and than it stop. the process not terminate, but froze. i try to run the x264 from terminal, that works fine. the problem must be in java.

    here my code:

    String[] command= new String[]{"cmd","/c","x264.exe ....";
ProcessBuilder pb = new ProcessBuilder(temp);
Process p = pb.start();
int ev = 0;
if (p.waitFor() != 0)
{
  ev = p.exitValue();
}

    best regards, paul

Navigation

Sites Web