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• 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:

  

• x264 : How to Correctly Use quant_offsets ?

  25 août 2022, par Eynnzerr

  Suppose I need to encode different regions with different QPs in one frame, i.e. RoI(regions of interest) encoding. I searched all over the internet and was only told that quant_offsets can meet my demand. However, none of them told me exactly how to use it, and I can't find any official documentation about it. I read the source code of x264 and did experiments, and find it only adds an offset to the qp decision x264 has made, rather than exactly set the qp value I want.

  Is there a possible way that I can have x264 encode these regions using the qp value I've explictly given instead of adding offsets based on what it decided on its own? Many thanks!