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• avcodec/bsf : Don't set defaults for AVClass without options

  17 mars 2020, par Andreas Rheinhardt

  avcodec/bsf : Don't set defaults for AVClass without options
  This happened for AVBSFContext.
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
  
  Reviewed-by : Anton Khirnov <anton@khirnov.net>
  
  Signed-off-by : James Almer <jamrial@gmail.com>
  

  • [DH] libavcodec/bsf.c

• Deal with resolution changed while decoding ?

  30 juillet 2024, par TTGroup

  I'm using FFMPEG with C++ to read frames and decode them from RTSP Stream on IP Camera.

  


  Anything is ok, but while decoding, I try to change stream resolution config on IP Camera (ex : change from 1280x720 to 1920x1080).

  


  The result is av_read_frame() in while loop still read successful next frames (with new resolution) without error. So I can not detect that change to reinit buffer or reconnect stream to update other stream's information.

  


  av_read_frame() will read an AVPacket, If I can read resolution info in the AVPacket, then I can detect that change and reinit buffer. But I can't see any resolution info in AVPacket struct.

  


  How do I detect a resolution change while reading and decoding the stream ?

  


  ---

  


  I'm using many codecs as H264 and H265/H265+. This case happened with all 3 codecs above.

  


  In many cases, I also store the AVPacket for later playback, so there's no need for decode. I need to detect the resolution change immediately to be able to properly build header information to store on the HDD.

  


• FFMPEG "Could not allocate memory" Errors through php

  10 décembre 2019, par Applepiee

  I’ve tried to find a solution online for days now but cannot find any solution.

  I just switched server (Intel Xeon to AMD) and since the switch I’ve not been able to get ffmpeg conversions working through the php script. ffmpeg was the exact same version and all php settings are set.

  All commands that the script executes (copied from log files) were tried in shell and executed with no problems.

  The errors look like this :

  [124] =>       handler_name    : Video Media Handler
  
      [125] =>     Stream #8:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 160 kb/s (default)
  
      [126] =>     Metadata:
  
      [127] =>       handler_name    : Sound Media Handler
  
      [128] => Stream mapping:
  
      [129] =>   Stream #0:0 (h264) -> concat:in0:v0
  
      [130] =>   Stream #1:0 (h264) -> concat:in1:v0
  
      [131] =>   Stream #2:0 (h264) -> concat:in2:v0
  
      [132] =>   Stream #3:0 (h264) -> concat:in3:v0
  
      [133] =>   Stream #4:0 (h264) -> concat:in4:v0
  
      [134] =>   Stream #5:0 (h264) -> concat:in5:v0
  
      [135] =>   Stream #6:0 (h264) -> concat:in6:v0
  
      [136] =>   Stream #7:0 (h264) -> concat:in7:v0
  
      [137] =>   scale -> Stream #0:0 (libvpx)
  
      [138] => Press [q] to stop, [?] for help
  
      [139] => [h264 @ 0x34f1dc0] get_buffer() failed
  
      [140] => [h264 @ 0x34f1dc0] thread_get_buffer() failed
  
      [141] => [h264 @ 0x34f1dc0] decode_slice_header error
  
      [142] => [h264 @ 0x34f1dc0] no frame!
  
      [143] => [h264 @ 0x350e680] Error splitting the input into NAL units.
  
      [144] => [h264 @ 0x352af40] Cannot allocate memory.
  
      [145] => [h264 @ 0x352af40] Could not allocate memory
  
      [146] => [h264 @ 0x352af40] h264_slice_header_init() failedError while decoding stream #0:0: Cannot allocate memory
  
      [147] => [h264 @ 0x352af40] Cannot allocate memory.
  
      [148] => [h264 @ 0x352af40] Could not allocate memory
  
      [149] => [h264 @ 0x352af40] h264_slice_header_init() failedError while decoding stream #0:0: Cannot allocate memory
  
      [150] => [h264 @ 0x352af40] Cannot allocate memory.
  
      [151] => [h264 @ 0x352af40] Could not allocate memory
  
      [152] => [h264 @ 0x352af40] h264_slice_header_init() failedError while decoding stream #0:0: Cannot allocate memory
  
      [153] => [h264 @ 0x352af40] Cannot allocate memory.
  
      [154] => [h264 @ 0x352af40] Could not allocate memory
  
      [155] => [h264 @ 0x352af40] h264_slice_header_init() failedError while decoding stream #0:0: Cannot allocate memory
  
      [156] => [h264 @ 0x352af40] Cannot allocate memory.
  
      [157] => [h264 @ 0x352af40] Could not allocate memory
  
  ...
  
  ..
  
    [211519] => [h264 @ 0x886a3c0] h264_slice_header_init() failedToo many errors when draining, this is a bug. Stop draining and force EOF.
  
      [211520] => Error while decoding stream #7:0: Internal bug, should not have happened
  
      [211521] => Cannot allocate memory.
  
      [211522] => sws: initFilter failed
  
      [211523] => [Parsed_scale_1 @ 0x8e0be40] Failed to configure output pad on Parsed_scale_1
  
      [211524] => Error reinitializing filters!
  
      [211525] => Error while filtering: Operation not permitted
  
      [211526] => Finishing stream 0:0 without any data written to it.
  
      [211527] => [libvpx @ 0x6f4c600] v1.8.1-301-g89375f031
  
      [211528] => Output #0, webm, to '/home/website/public_html/media/videos/tmb/2420/video_copy.webm':
  
      [211529] =>   Metadata:
  
      [211530] =>     major_brand     : isom
  
      [211531] =>     minor_version   : 512
  
      [211532] =>     compatible_brands: isomiso2avc1mp41
  
      [211533] =>     title           : Aibeya The Animation
  
      [211534] =>     encoder         : Lavf58.35.100
  
      [211535] =>     Chapter #0:0: start 0.000000, end 102.102000
  
      [211536] =>     Metadata:
  
      [211537] =>       title           : Intro
  
      [211538] =>     Chapter #0:1: start 102.102000, end 110.369000
  
      [211539] =>     Metadata:
  
      [211540] =>       title           : Title
  
      [211541] =>     Chapter #0:2: start 110.369000, end 312.179000
  
      [211542] =>     Metadata:
  
      [211543] =>       title           : Part 1
  
      [211544] =>     Chapter #0:3: start 312.179000, end 548.415000
  
      [211545] =>     Metadata:
  
      [211546] =>       title           : Part 2
  
      [211547] =>     Chapter #0:4: start 548.415000, end 706.831000
  
      [211548] =>     Metadata:
  
      [211549] =>       title           : Part 3
  
      [211550] =>     Chapter #0:5: start 706.831000, end 1011.052000
  
      [211551] =>     Metadata:
  
      [211552] =>       title           : Part 4
  
      [211553] =>     Chapter #0:6: start 1011.052000, end 1198.823000
  
      [211554] =>     Metadata:
  
      [211555] =>       title           : Part 5
  
      [211556] =>     Chapter #0:7: start 1198.823000, end 1501.408000
  
      [211557] =>     Metadata:
  
      [211558] =>       title           : Part 6
  
      [211559] =>     Chapter #0:8: start 1501.408000, end 1579.945000
  
      [211560] =>     Metadata:
  
      [211561] =>       title           : Part 7
  
      [211562] =>     Chapter #0:9: start 1579.945000, end 1654.293000
  
      [211563] =>     Metadata:
  
      [211564] =>       title           : Ending
  
      [211565] =>     Stream #0:0: Video: vp8 (libvpx), yuv420p, 400x240 [SAR 837:785 DAR 279:157], q=10-42, 250 kb/s, 23.98 fps, 1k tbn, 23.98 tbc (default)
  
      [211566] =>     Metadata:
  
      [211567] =>       encoder         : Lavc58.64.101 libvpx
  
      [211568] =>     Side data:
  
      [211569] =>       cpb: bitrate max/min/avg: 0/0/0 buffer size: 600000 vbv_delay: N/A
  
      [211570] => frame=    0 fps=0.0 q=0.0 Lsize=       1kB time=00:00:00.00 bitrate=N/A speed=   0x
  
      [211571] => video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
  
      [211572] => Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)
  
      [211573] => Conversion failed!
  
  )

  Command example used :

  ffmpeg_command is /usr/local/bin/ffmpeg -ss 100 -t 1 -i /home/website/public_html/media/videos/iphone/2407.mp4 -ss 197 -t 2 -i /home/website/public_html/media/videos/iphone/2407.mp4 -ss 294 -t 3 -i /home/website/public_html/media/videos/iphone/2407.mp4 -ss 391 -t 3 -i /home/website/public_html/media/videos/iphone/2407.mp4 -ss 488 -t 3 -i /home/website/public_html/media/videos/iphone/2407.mp4 -ss 585 -t 3 -i /home/website/public_html/media/videos/iphone/2407.mp4 -ss 682 -t 3 -i /home/website/public_html/media/videos/iphone/2407.mp4 -ss 779 -t 3 -i /home/website/public_html/media/videos/iphone/2407.mp4 -ss 876 -t 3 -i /home/website/public_html/media/videos/iphone/2407.mp4 -filter_complex "[0][1][2][3][4][5][6][7]concat=n=8:v=1:a=0",scale=400:240 -codec:v libx264 -unsharp -b:v 250k -maxrate 250k -bufsize 600k -qmin 10 -qmax 42 -threads 4 -an -y /home/website/public_html/media/videos/tmb/2407/video_copy.mp4

  PHP Info :
  PHP 5.6
  memory_limit 2001M
  max_execution_time 7200
  upload_max_filesize 2000M
  post_max_size 2000M
  max_input_time 7200
  exec is not disabled

  Server info
  CentOS Linux 7 (Core)
  ADVANCE-4 - AMD Epyc 7351P - 128GB DDR4 ECC 2400MHz - 2x HDD SATA 4TB Datacenter Class + 2x SSD NVMe 500GB Enterprise Class Soft RAID

  All help is really appreciated ! Thanks in advance