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  • x264 lib fails to build on Android, other plugins not included

    24 novembre 2022, par SOSparachuter1

    On my x86 windows machine, I'm compiling an Android app that links gstreamer using CMake: https://github.com/henkeldi/gstreamer-android/blob/master/app/src/main/cpp/CMakeLists.txt

    I'm using the latest Android binaries provided by gstreamer, so far everything worked and I've successfully linked gstreamer's app plugin. Next I tried to link x264:

    SET(GST_PLUGINS_CORE_LIBS gstx264 gstapp)

SET(GST_PLUGINS_BASE ... x264)

    However, doing so results in dozens of these text relocation errors:

    ld:error: relocation R_AARCH64_ADD_ABS_L012_NC cannot be used against symbol x264_cabac_range_lps; recompile with -fPIC

    Even after I add the flag -fPIC these do not go away. Doing a bit of digging I see that Android does not allow text relocation since Api23, but that was several years ago. Is there still no fix on Android?

    I also noticed that the videoparsersbad and hls plugins are not in the latest Android gstreamer binaries (version 1.21.2). Are these also not supported on Android?

  • ffmpeg conversion x264 [error] : malloc of size 769152 failed

    4 octobre 2022, par prashanthp

    I am trying to convert video recorded from Android smart watch (.mp4 format) to a format (.mp4) which playable on all browsers. The video recorded from smart watch is not playing in the browsers. so, i've used ffmpeg to convert in into a playable mp4 format.

    But sometimes it is showing error as x264 [error]: malloc of size 503008 failed

    What is the reason for this. Sometimes it's getting converted and sometimes it is showing error .

    Here is the console output.

     /usr/local/ffmpeg_build/ffmpeg/bin/ffmpeg  -i /home/xestatt1/public_html/app/webroot/mobile/uploads/in/Dec152014161945.mp4 -vcodec libx264   -r 24 -s 352*288 -acodec aac  -ab 12k -strict -2  /home/xestatt1/public_html/app/webroot/mobile/uploads/out/ot12.mp4

ffmpeg version 2.5.git Copyright (c) 2000-2014 the FFmpeg developers
  built on Dec 13 2014 05:42:08 with gcc 4.1.2 (GCC) 20080704 (Red Hat 4.1.2-55)
  configuration: --prefix=/usr/local/ffmpeg_build/ffmpeg --enable-libx264 --enable-gpl --extra-cflags=-I/usr/local/ffmpeg_build/x264/include --extra-ldflags=-L/usr/local/ffmpeg_build/x264/lib
  libavutil      54. 15.100 / 54. 15.100
  libavcodec     56. 14.100 / 56. 14.100
  libavformat    56. 15.103 / 56. 15.103
  libavdevice    56.  3.100 / 56.  3.100
  libavfilter     5.  2.103 /  5.  2.103
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  1.100 /  1.  1.100
  libpostproc    53.  3.100 / 53.  3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/xestatt1/public_html/app/webroot/mobile/uploads/in/Dec152014161945.mp4':
  Metadata:
    major_brand     : 3gp4
    minor_version   : 0
    compatible_brands: isom3gp4
    creation_time   : 2014-12-15 10:50:02
  Duration: 00:00:10.12, start: 0.000000, bitrate: 151 kb/s
    Stream #0:0(eng): Video: mpeg4 (Simple Profile) (mp4v / 0x7634706D), yuv420p, 320x240 [SAR 1:1 DAR 4:3], 135 kb/s, 13.14 fps, 50 tbr, 90k tbn, 200 tbc (default)
    Metadata:
      creation_time   : 2014-12-15 10:50:02
      handler_name    : VideoHandle
      encoder         :
    Stream #0:1(eng): Audio: amr_nb (samr / 0x726D6173), 8000 Hz, mono, flt, 12 kb/s (default)
    Metadata:
      creation_time   : 2014-12-15 10:50:02
      handler_name    : SoundHandle
File '/home/xestatt1/public_html/app/webroot/mobile/uploads/out/ot12.mp4' already exists. Overwrite ? [y/N] y
[libx264 @ 0x13b69120] using SAR=12/11
[libx264 @ 0x13b69120] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.1 Cache64
[libx264 @ 0x13b69120] profile High, level 1.3
[libx264 @ 0x13b69120] 264 - core 142 - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=24 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to '/home/xestatt1/public_html/app/webroot/mobile/uploads/out/ot12.mp4':
  Metadata:
    major_brand     : 3gp4
    minor_version   : 0
    compatible_brands: isom3gp4
    encoder         : Lavf56.15.103
    Stream #0:0(eng): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 352x288 [SAR 12:11 DAR 4:3], q=-1--1, 24 fps, 12288 tbn, 24 tbc (default)
    Metadata:
      creation_time   : 2014-12-15 10:50:02
      handler_name    : VideoHandle
      encoder         : Lavc56.14.100 libx264
    Stream #0:1(eng): Audio: aac ([64][0][0][0] / 0x0040), 8000 Hz, mono, fltp, 12 kb/s (default)
    Metadata:
      creation_time   : 2014-12-15 10:50:02
      handler_name    : SoundHandle
      encoder         : Lavc56.14.100 aac
Stream mapping:
  Stream #0:0 -> #0:0 (mpeg4 (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (amr_nb (amrnb) -> aac (native))
Press [q] to stop, [?] for help
Past duration 1.000000 too large
Multiple frames in a packet from stream 1
Past duration 1.000000 too large
av_interleaved_write_frame(): Cannot allocate memory
x264 [error]: malloc of size 769152 failed
Video encoding failed
[libx264 @ 0x13b69120] frame I:1     Avg QP:22.20  size:  3166
[libx264 @ 0x13b69120] mb I  I16..4: 28.3% 70.5%  1.3%
[libx264 @ 0x13b69120] 8x8 transform intra:70.5%
[libx264 @ 0x13b69120] coded y,uvDC,uvAC intra: 47.5% 55.3% 12.4%
[libx264 @ 0x13b69120] i16 v,h,dc,p: 16% 26%  6% 52%
[libx264 @ 0x13b69120] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 24% 19% 15% 12%  3%  3%  3%  5% 16%
[libx264 @ 0x13b69120] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 16%  2% 20% 10% 16% 14%  4% 11%  6%
[libx264 @ 0x13b69120] i8c dc,h,v,p: 61% 17% 19%  4%
[libx264 @ 0x13b69120] kb/s:607.87
[aac @ 0x13b6a4c0] 2 frames left in the queue on closing
Conversion failed!

    UPDATED

    When i execute this from shell it is working fine. But when i create a script file and trying to execute that script file from php , it is showing error's. I increased the memory limit in php, still it is showing error. Also , we are using ZEND framework. Is there any problems with ZEND??

  • How is the FFMPEG x264 result bitrate calculated ?

    12 septembre 2022, par secondplace

    When encoding in x264 (libx264) there is a listing at the end showing different encoding stats. I noticed that the Bitrate is too high. I was wondering how this can be.

    Here is an example:

    frame=177719 fps= 24 q=-1.0 Lsize= 4768888kB time=02:03:35.74 bitrate=5268.1kbits/s dup=0 drop=43 speed=1.01x
video:4186558kB audio:579355kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.062419%

    From the first two result lines I can grab the stream size and stream duration. From that i can calculate the overall bitrate

    (4186558 * 8) / 7415.744 = 4516.39970311812

    However the last FFMPEG output shows an additional 108.4kb/s:

    [libx264 @ 0000026e1011f440] kb/s:4624.79

    When I use MediaInfo to get the stream size and stream duration it's also a little different.

    (4192906.438 * 8) / 7415.742 = 4523.24952836817

    The manual calculations from FFMPEG and MediaInfo are close enough and not significantly different however where are the 100kb/s+ from FFMPEG results coming from?

    Edit:

    I just found out that using --parsespeed=1 in MediaInfo CLI will give more accurate results for Variable Bitrates. Default is 0.5.

  • I B P frames order and relative time - ffmpeg recorded video not smooth (stuttering)

    8 septembre 2022, par Francesco

    I'm trying to understand why my recorded video is not smooth. I'm using a USB capture device and OBS/ffmpeg software. OBS Stats doesn't show any skipped/missed frames during recording.

    Using this command on the resulting file (H264, mkv)

    ffprobe -v quiet -pretty -print_format csv -show_entries "frame=coded_picture_number,pkt_pts,pkt_duration,pict_type," -select_streams v:0 test.mkv > output.csv

    I see an output like this one:

    frame,33,33,I,0
frame,67,33,P,1
frame,100,33,I,2
frame,133,33,I,3
frame,167,33,P,4
frame,200,33,I,5
frame,233,33,P,6
frame,267,33,I,7
frame,300,33,B,9
frame,333,33,P,8
frame,367,33,I,10
frame,400,33,P,11
frame,433,33,I,12
frame,467,33,B,14
frame,500,33,P,13
frame,533,33,I,15
frame,567,33,P,16
frame,600,33,I,17
frame,633,33,B,19
frame,667,33,P,18
frame,700,33,I,20
frame,733,33,B,22
frame,767,33,P,21
frame,800,33,I,23
frame,833,33,B,25
frame,867,33,P,24
frame,900,33,I,26
frame,933,33,B,28
frame,967,33,P,27
frame,1000,33,I,29
...

    If I understood correclty the last number refers to presentation order and the second number is the video relative time. Frame number 9 (type B) is shown at 300 ms while frame number 8 (type P) is shown at 333 ms.

    Is it correct? If not, is this the stuttering source and is there a way for fixing the order?

  • How can i encode a video using a QP map in x264 ? [closed]

    5 septembre 2022, par JustABeginner

    I have a qp table contains x and y coordinates, poc and QP value of each block.

    How can I change x264 source code so that I could encode a video with this table?

    I tried using qpfile but its for each frame, not each blocks.

    Hope someone could help me.

    Here's the table I mentioned:

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