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• Error while trying to create dashcast stream using libx265

  16 décembre 2015, par Rahul

  I’m trying to create a h265 encoded stream from webcam using the follwoing command.

  DashCast -vf video4linux2  -v4l2f mjpeg -v /dev/video0 -conf dashcast.conf -live-media

  The content if dashcast.conf is

  [v1]
  
  type=video
  
  codec=libx265
  
  bitrate=1000000
  
  framerate=25
  
  width=640
  
  height=480

  But I’m getting this error.

  Options:
  
      video source: /dev/video0
  
      video format: video4linux2
  
      v4l2 format: mjpeg
  
      video crop: 0x0
  
      audio source: 
  
  Configurations:
  
      id:v1   res:640x480 vbr:1000000
  
  [mjpeg @ 0xb194e0] Changeing bps to 8
  
  Input #0, video4linux2,v4l2, from '/dev/video0':
  
    Duration: N/A, start: 50349.327770, bitrate: N/A
  
      Stream #0:0: Video: mjpeg, yuvj422p(pc, bt470bg/unknown/unknown), 1280x720, -5 kb/s, 30 fps, 30 tbr, 1000k tbn, 1000k tbc
  
  AVCTX give frame duration of 1/1000000 - keeping requested rate -1, but this may result in unexpected behaviour.
  
  [swscaler @ 0xb91ea0] deprecated pixel format used, make sure you did set range correctly
  
  Press q or Q to exit...
  
  [dashcast] Live system dropped a video frame
  
  [dashcast] Live system dropped a video frame
  
  x265 [info]: HEVC encoder version 1.85dcc9d3a928c400b
  
  x265 [info]: build info [Linux][GCC 4.8.4][64 bit] 8bit
  
  x265 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX AVX2 FMA3 LZCNT BMI2
  
  x265 [info]: Main profile, Level-3 (Main tier)
  
  x265 [info]: Thread pool created using 4 threads
  
  x265 [info]: frame threads / pool features       : 1 / wpp(8 rows)
  
  [dashcast] Live system dropped a video frame
  
  x265 [info]: Coding QT: max CU size, min CU size : 64 / 8
  
  x265 [info]: Residual QT: max TU size, max depth : 32 / 1 inter / 1 intra
  
  x265 [info]: ME / range / subpel / merge         : hex / 57 / 2 / 2
  
  x265 [info]: Keyframe min / max / scenecut       : 25 / 250 / 40
  
  x265 [info]: Lookahead / bframes / badapt        : 20 / 4 / 2
  
  x265 [info]: b-pyramid / weightp / weightb       : 1 / 1 / 0
  
  x265 [info]: References / ref-limit  cu / depth  : 3 / 0 / 0
  
  x265 [info]: AQ: mode / str / qg-size / cu-tree  : 1 / 1.0 / 32 / 1
  
  x265 [info]: Rate Control / qCompress            : ABR-1000 kbps / 0.60
  
  x265 [info]: tools: rd=3 psy-rd=0.30 signhide tmvp strong-intra-smoothing
  
  x265 [info]: tools: deblock sao
  
  Cannot parse HEVC/H265 SPS/PPS
  
  Bad Parameter: dc_gpac_video_write_config
  
  Bad Parameter: gf_isom_start_segment
  
  Cannot open output video file.
  
  Generating MPD at 2015-11-24T19:17:46.040Z
  
  StartTime: 2015-11-24T19:17:46.040Z - startNumber 1 - last number 1
  
  Keyboard thread exit
  
  [dashcast] Live system dropped a video frame
  
  [dashcast] Live system dropped a video frame

  What could be the problem ? Changing codec to libx264 in the conf file works fine.

• Seeking with FFMPEG at the end of an RTSP stream

  30 juillet 2019, par kealist

  I am using ffmpeg to play RTSP streams in an application. I have been running into a problem that once I reach the end of an RTSP stream, I am no longer able to see back to anywhere in the stream.

  The program I am writing is using LGPL shared libraries, but I can see the same behavior using ffplay using GPL version.

  ffplay.exe "rtsp://184.72.239.149/vod/mp4:BigBuckBunny_115k.mov"

  While the video is playing, I can seek forward or backwards using the keyboard shortcuts for ffplay (left / right arrow key). Once the stream reaches the end, it is not possible and the stream is paused or playing, seeking no longer works. I see errors in the shared lib, but in ffplay, I do not see errors unless I use the s key (which may make sense that I cannot seek). In other streams, I have seen an issue where the stream is longer than the reported length, and once the extra video is buffered/downloaded, it is not possible to seek. Any guidance on what is going on here ?

  Using ffplay.exe (also verified with newer build) :

  C:\Users\kealist\Downloads\ffmpeg-20180526-63c4a4b-win64-static\bin>ffplay "rtsp://184.72.239.149/vod/mp4:BigBuckBunny_115k.mov"
  
  ffplay version N-91158-g63c4a4b0d6 Copyright (c) 2003-2018 the FFmpeg developers
  
    built with gcc 7.3.0 (GCC)
  
    configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth
  
    libavutil      56. 18.102 / 56. 18.102
  
    libavcodec     58. 19.104 / 58. 19.104
  
    libavformat    58. 17.100 / 58. 17.100
  
    libavdevice    58.  4.100 / 58.  4.100
  
    libavfilter     7. 24.100 /  7. 24.100
  
    libswscale      5.  2.100 /  5.  2.100
  
    libswresample   3.  2.100 /  3.  2.100
  
    libpostproc    55.  2.100 / 55.  2.100
  
  [udp @ 0000023ce71807c0] 'circular_buffer_size' option was set but it is not supported on this build (pthread support is required)
  
  [udp @ 0000023ce7174ac0] 'circular_buffer_size' option was set but it is not supported on this build (pthread support is required)
  
  [udp @ 0000023ce71a6f40] 'circular_buffer_size' option was set but it is not supported on this build (pthread support is required)
  
  [udp @ 0000023ce7174bc0] 'circular_buffer_size' option was set but it is not supported on this build (pthread support is required)
  
  [rtsp @ 0000023ce717d900] UDP timeout, retrying with TCP 0B f=0/0
  
  Input #0, rtsp, from 'rtsp://184.72.239.149/vod/mp4:BigBuckBunny_115k.mov':
  
    Metadata:
  
      title           : BigBuckBunny_115k.mov
  
    Duration: 00:09:56.48, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Audio: aac (LC), 12000 Hz, stereo, fltp
  
      Stream #0:1: Video: h264 (Constrained Baseline), yuv420p(progressive), 240x160, 24 fps, 24 tbr, 90k tbn, 48 tbc
  
  rtsp://184.72.239.149/vod/mp4:BigBuckBunny_115k.mov: error while seeking
  
  rtsp://184.72.239.149/vod/mp4:BigBuckBunny_115k.mov: error while seeking
  
   596.27 A-V:-32.424 fd=1290 aq=    0KB vq=    0KB sq=    0B f=1/1

  With -v trace I can see that there is a Seek message, but no seeking actually occurs whether it is paused or playing.

  video: delay=0.000 A-V=0.173265
  
  Seek to 37% ( 0:03:38) of total duration ( 0:09:56)       B f=1/1
  
  Seek to 83% ( 0:08:14) of total duration ( 0:09:56)       B f=1/1
  
  Seek to 57% ( 0:05:42) of total duration ( 0:09:56)       B f=1/1
  
  Seek to 78% ( 0:07:41) of total duration ( 0:09:56)       B f=1/1
  
  Seek to 85% ( 0:08:24) of total duration ( 0:09:56)       B f=1/1
  
  Seek to 92% ( 0:09:06) of total duration ( 0:09:56)       B f=1/1
  
      Last message repeated 1 times
  
  Seek to 92% ( 0:09:08) of total duration ( 0:09:56)       B f=1/1
  
      Last message repeated 1 times
  
   597.08 A-V:-34.561 fd= 312 aq=    0KB vq=    0KB sq=    0B f=1/1

  Is there a way to mitigate this without reloading the stream ?

• yt-dlp get audio only link -> ffmpeg piped audio -> ffplay

  5 juin 2022, par james28909

  Ok, i have a perl script that i am trying to figure out why it is throwing an io error. First i use yt-dlg to get the link of only the audio - this works as expected and i can navigate to the link in a browser just fine. then i open a ffmpeg pipe in perl and then try to read the output from ffmpeg and eventually, if i can get this working, i will process the ffmpeg output then send to a named pipe.

  


  the problem comes from the ffmpeg when i am processing the data from the link obtained with yt-dlp, and i think it has to do with my while loop but i am not sure what. i have a named pipe called "input". i summon ffmpeg with the following :

  


  #/usr/bin/perl
use strict;
use warnings;

my $file = /path/to/named/pipe
my $read_len = 1024;

open (my $SOURCE_AUDIO, '-|', "ffmpeg -y -i \'$link\' -map 0 -c copy -ac 2 -f opus -ar 48000 pipe:1");
binmode($SOURCE_AUDIO);

# process the ffmpeg output.i have a function i want to implement here, 
# but i need to be able to parse ffmpeg output in set read lengths

while( read($SOURCE_AUDIO, my $buf, $read_len)){
print $file $buf;
};


  


  but before the end of the playback, somewhere around the end of the audio stream ffmpeg throws errors like this :

  


  [tls @ 0x5d0de00] Error in the pull function..2kbits/s speed=1.21x
[tls @ 0x5d0de00] IO error: Connection reset by peer
[tls @ 0x5d0de00] The specified session has been invalidated for some reason.
    Last message repeated 1 times
https://rr3---sn-(truncated): Input/output error
size=    1021kB time=00:01:18.36 bitrate= 106.7kbits/s speed=1.21x
video:0kB audio:1012kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.808163%


  


  i am not sure what is causing it to end early, or what is causing it to be terminated. i can download the file and re-encode it (if needed) and then play it flawlessly with ffplay, but i cannot, for the life of me, parse ffmpeg output and write it to a named pipe. any help sure would be appreciated. thanks

  


  P.S. i am using latest updated windows 11 and WSL's built in perl :

  


  This is perl 5, version 30, subversion 0 (v5.30.0) built for x86_64-linux-gnu-thread-multi
(with 50 registered patches, see perl -V for more detail)

Copyright 1987-2019, Larry Wall

Perl may be copied only under the terms of either the Artistic License or the
GNU General Public License, which may be found in the Perl 5 source kit.

Complete documentation for Perl, including FAQ lists, should be found on
this system using "man perl" or "perldoc perl".  If you have access to the
Internet, point your browser at http://www.perl.org/, the Perl Home Page.