ffmpeg Warning: data is not aligned! This can lead to a speed loss

Digital ATV - The latest generation, cutting edge ATV - Please discuss it all here.
Forum rules
This forum is run by the BATC (British Amateur Television Club), it is service made freely available to all interested parties, please do not abuse this privilege.

Thank you
Post Reply
PE5PVB
Posts: 155
Joined: Sun Sep 02, 2012 6:51 pm

ffmpeg Warning: data is not aligned! This can lead to a speed loss

Post by PE5PVB » Wed Apr 05, 2023 1:09 pm

Anyone has an idea what causes this waring?

I use this string to start ffmpeg:

Code: Select all

ffmpeg -init_hw_device qsv=hw -filter_hw_device hw -rtbufsize 400M -f dshow -thread_queue_size 512 -i video="OBS-Camera" -f dshow -thread_queue_size 2048 -i audio="OBS-Audio" -c:v h264_qsv -s 1280x720 -r 50 -bf 0 -profile:v main -level 3.1 -pixel_format yuv420p -preset veryfast -aspect 16:9 -b:v 2500k -minrate 2500k -maxrate 2500k -bufsize 2500k -c:a aac -ac 2 -b:a 128k -ar 48000 -flush_packets 0 -f mpegts -mpegts_original_network_id 40000 -mpegts_transport_stream_id 1 -mpegts_service_id 1 -mpegts_pmt_start_pid 100 -streamid 0:101 -streamid 1:102 -metadata service_provider="PI6EHV" -metadata service_name="PI6EHV HD" -pcr_period 20 -max_delay 2500000 -pat_period 0.10 -sdt_period 0.25 -muxrate 4000k -flush_packets 0 -y -mpegts_flags +pat_pmt_at_frames -f mpegts "udp://239.1.2.4:10000?pkt_size=1316&bitrate=4000000&overrun_nonfatal=1"
This is the output:

Code: Select all

ffmpeg version n4.4-ffmpeg-windows-build-helpers Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 10.2.0 (GCC)
  configuration: --pkg-config=pkg-config --pkg-config-flags=--static --extra-version=ffmpeg-windows-build-helpers --enable-version3 --disable-debug --disable-w32threads --arch=x86_64 --target-os=mingw32 --cross-prefix=/home/foxunix/ffmpeg-windows-build-helpers/sandbox/cross_compilers/mingw-w64-x86_64/bin/x86_64-w64-mingw32- --enable-libcaca --enable-gray --enable-libtesseract --enable-fontconfig --enable-gmp --enable-gnutls --enable-libass --enable-libbluray --enable-libbs2b --enable-libflite --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopus --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libvorbis --enable-libwebp --enable-libzimg --enable-libzvbi --enable-libmysofa --enable-libopenjpeg --enable-libopenh264 --enable-liblensfun --enable-libvmaf --enable-libsrt --enable-libxml2 --enable-opengl --enable-libdav1d --enable-cuda-llvm --enable-libsvthevc --enable-libsvtav1 --enable-libaom --enable-libvpx --enable-nvenc --enable-nvdec --extra-libs=-lharfbuzz --extra-libs=-lm --extra-libs=-lpthread --extra-cflags=-DLIBTWOLAME_STATIC --extra-cflags=-DMODPLUG_STATIC --extra-cflags=-DCACA_STATIC --enable-amf --enable-libmfx --enable-gpl --enable-frei0r --enable-librubberband --enable-libvidstab --enable-libx264 --enable-libx265 --enable-avisynth --enable-libaribb24 --enable-libxvid --enable-libdavs2 --enable-libxavs2 --enable-libxavs --extra-cflags='-mtune=generic' --extra-cflags=-O3 --enable-static --disable-shared --prefix=/home/foxunix/ffmpeg-windows-build-helpers/sandbox/cross_compilers/mingw-w64-x86_64/x86_64-w64-mingw32 --enable-nonfree --enable-libfdk-aac --enable-decklink
  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
[swscaler @ 00000248b7eec000] Warning: data is not aligned! This can lead to a speed loss
Input #0, dshow, from 'video=OBS-Camera':
  Duration: N/A, start: 274206.310000, bitrate: N/A
  Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1280x720, 50 fps, 50 tbr, 10000k tbn, 10000k tbc
Guessed Channel Layout for Input Stream #1.0 : stereo
Input #1, dshow, from 'audio=OBS-Audio':
  Duration: N/A, start: 274206.436000, bitrate: 1411 kb/s
  Stream #1:0: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (h264_qsv))
  Stream #1:0 -> #0:1 (pcm_s16le (native) -> aac (native))
Press [q] to stop, [?] for help
Output #0, mpegts, to 'udp://239.1.2.4:10000?pkt_size=1316&bitrate=4000000&overrun_nonfatal=1':
  Metadata:
    service_provider: PI6EHV
    service_name    : PI6EHV HD
    encoder         : Lavf58.76.100
  Stream #0:0: Video: h264, nv12(tv, progressive), 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 2500 kb/s, 50 fps, 90k tbn
    Metadata:
      encoder         : Lavc58.134.100 h264_qsv
    Side data:
      cpb: bitrate max/min/avg: 2500000/2500000/2500000 buffer size: 2500000 vbv_delay: N/A
  Stream #0:1: Audio: aac (LC), 48000 Hz, stereo, fltp, 128 kb/s
    Metadata:
      encoder         : Lavc58.134.100 aac
f
Top
Basil
Posts: 299
Joined: Tue Sep 10, 2013 7:28 pm

Re: ffmpeg Warning: data is not aligned! This can lead to a speed loss

Post by Basil » Wed Apr 05, 2023 2:43 pm

I see that all the time, I don't think it's particularly significant from what someone said. I can't remeber if I asked here or elsewhere.
Top
Post Reply

Return to “DATV - Digital ATV”