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• avformat/ffrtmpcrypt : Fix int-conversion warning

  22 décembre 2023, par Frank Plowman

  avformat/ffrtmpcrypt : Fix int-conversion warning
  The gcrypt definition of `bn_new` used to use the return statement
  
  on errors, with an AVERROR return value, regardless of the signature
  
  of the function where the macro is used - it is called in
  
  `dh_generate_key` and `ff_dh_init` which return pointers. As a result,
  
  compiling with gcrypt and the ffrtmpcrypt protocol resulted in an
  
  int-conversion warning. GCC 14 may upgrade these to errors [1].
  This patch fixes the problem by changing the macro to remove `AVERROR`
  
  and instead set `bn` to null if the allocation fails. This is the
  
  behaviour of all the other `bn_new` implementations and so the result is
  
  already checked at all the callsites. AFAICT, this should be the only
  
  change needed to get ffmpeg off Fedora's naughty list of projects with
  
  warnings which may be upgraded to errors in GCC 14 [2].
  [1] : https://gcc.gnu.org/pipermail/gcc/2023-May/241264.html
  
  [2] : https://www.mail-archive.com/devel@lists.fedoraproject.org/msg196024.html
  Signed-off-by : Frank Plowman <post@frankplowman.com>
  
  Signed-off-by : Martin Storsjö <martin@martin.st>
  

  • [DH] libavformat/rtmpdh.c

• ffmpeg - converting one audio track of a multi-track mp4

  30 décembre 2023, par Shaun.M

  I'm having a few mp4 with two audio tracks,
an english one in aac and a french one in dts.

  


  Now I want to convert only the french dts to eac3 with a single ffmpeg command.

  


  I use

  


  ffmpeg -hide_banner -i input.mp4 ^
             -map_metadata -1 ^
             -map 0:0 -c:v copy ^
             -map 0:1 -c:a copy ^
             -map 0:2 -c:a eac3 -b:a 1536k ^
             -metadata:s:a:0 language=eng ^
             -metadata:s:a:0 title="Stereo" ^
             -metadata:s:a:1 language=fra ^
             -metadata:s:a:1 title="Stereo" ^
output.mp4


  


  This works quite nice, but it converts both audio tracks to eac3, instead of leaving the first one untouched ...
What's wrong in the command ?

  


  (ffmpeg version 2023-12-23-git-f5f414d9c4-full_build-www.gyan.dev under Windows 10)

  


• FFmpeg Could not write header for output file #0 (incorrect codec parameters ?) : Invalid data found when processing input [closed]

  29 décembre 2023, par randompersonhehe

  I'm having trouble using FFmpeg to host an RTSP server for continuous video streaming. The command I'm using is :

  


  


  ffmpeg -report -v verbose -re -stream_loop -1 -i store-aisle-detection.mp4 -c copy -f rtsp rtsp ://localhost:8888/mystream

  


  


  Log :

  


  ffmpeg started on 2023-12-29 at 15:35:47
Report written to "ffmpeg-20231229-153547.log"
Log level: 48
ffmpeg version 4.4.2-0ubuntu0.22.04.1 Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 11 (Ubuntu 11.2.0-19ubuntu1)
  configuration: --prefix=/usr --extra-version=0ubuntu0.22.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-pocketsphinx --enable-librsvg --enable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  libavutil      56. 70.100 / 56. 70.100
  libavcodec     58.134.100 / 58.134.100
  libavformat    58. 76.100 / 58. 76.100
  libavdevice    58. 13.100 / 58. 13.100
  libavfilter     7.110.100 /  7.110.100
  libswscale      5.  9.100 /  5.  9.100
  libswresample   3.  9.100 /  3.  9.100
  libpostproc    55.  9.100 / 55.  9.100
[h264 @ 0x560863a19240] Reinit context to 720x416, pix_fmt: yuv420p
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'store-aisle-detection.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: mp42mp41
    creation_time   : 2018-07-18T23:51:37.000000Z
  Duration: 00:01:05.49, start: 0.000000, bitrate: 1125 kb/s
  Stream #0:0(eng): Video: h264 (Main), 1 reference frame (avc1 / 0x31637661), yuv420p(tv, smpte170m, left), 720x404 (720x416), 1089 kb/s, 59.94 fps, 59.94 tbr, 60k tbn, 119.88 tbc (default)
    Metadata:
      creation_time   : 2018-07-18T23:51:37.000000Z
      handler_name    : ?Mainconcept Video Media Handler
      vendor_id       : [0][0][0][0]
      encoder         : AVC Coding
  Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 24000 Hz, mono, fltp, 30 kb/s (default)
    Metadata:
      creation_time   : 2018-07-18T23:51:37.000000Z
      handler_name    : #Mainconcept MP4 Sound Media Handler
      vendor_id       : [0][0][0][0]
[tcp @ 0x560863b71e80] Starting connection attempt to 127.0.0.1 port 8888
[tcp @ 0x560863b71e80] Successfully connected to 127.0.0.1 port 8888
Could not write header for output file #0 (incorrect codec parameters ?): Invalid data found when processing input
Error initializing output stream 0:1 -- 
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (copy)
    Last message repeated 1 times
[AVIOContext @ 0x560863a20300] Statistics: 135494 bytes read, 0 seeks




  


  Can anyone help me identify and fix the problem with this command ? I want to loop the video infinitely on the RTSP server. I've tried variations with different formats (e.g., mp4 and ts), but the issue persists.

  


  Any insights into resolving this error would be greatly appreciated.