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• Why are there vaapi filters that exist in libavfilter but do not exist in my compiled version of ffmpeg ?

  13 juin 2020, par John Allard

  I've compiled the most recent snapshot of ffmpeg with vaapi enabled

  



  $ ffmpeg -hwaccesls
ffmpeg version N-98129-g0b182ff Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.12) 20160609
  configuration: --disable-debug --disable-doc --disable-ffplay --enable-shared --enable-avresample --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-gpl --enable-libass --enable-fontconfig --enable-libfreetype --enable-libvidstab --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 --enable-libxvid --enable-libx264 --enable-nonfree --enable-openssl --enable-libfdk_aac --enable-postproc --enable-small --enable-version3 --enable-libzmq --extra-libs=-ldl --prefix=/opt/ffmpeg --enable-libopenjpeg --enable-libkvazaar --enable-libaom --extra-libs=-lpthread --enable-libsrt --enable-vaapi --extra-cflags=-I/opt/ffmpeg/include --extra-ldflags=-L/opt/ffmpeg/lib
  libavutil      56. 54.100 / 56. 54.100
  libavcodec     58. 92.100 / 58. 92.100
  libavformat    58. 46.101 / 58. 46.101
  libavdevice    58. 11.100 / 58. 11.100
  libavfilter     7. 86.100 /  7. 86.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  8.100 /  5.  8.100
  libswresample   3.  8.100 /  3.  8.100
  libpostproc    55.  8.100 / 55.  8.100
Hardware acceleration methods:
vaapi


  



  I know that vaapi is working because I can use it for hardware decoding and encoding of h264 videos. I can see some vaapi filters as well

  



  $ ffmpeg -filters | grep vaapi
 ... deinterlace_vaapi V->V       (null)
 ... denoise_vaapi     V->V       (null)
 ... procamp_vaapi     V->V       (null)
 ... scale_vaapi       V->V       (null)
 ... sharpness_vaapi   V->V       (null)


  



  However, I notice that this list is missing the filter that I'm specifically looking for, namely , transpose_vaapi. If you look in the libavfilter source code you'll see the following

  



  This shows the transpose_vaapi filter defined in the allfilters.c file
https://github.com/FFmpeg/FFmpeg/blob/master/libavfilter/allfilters.c#L414

  



  This shows the transpose_vaapi filter source code
https://github.com/FFmpeg/FFmpeg/blob/master/libavfilter/vf_transpose_vaapi.c

  



  If the filter is defined in source code, it's defined in allfilters.c, and I've compiled ffmpeg from this source with vaapi enabled, why can I not use this filter with ffmpeg ?

  



  $ ffmpeg -y -hide_banner -nostats -loglevel error \
    -hwaccel vaapi -hwaccel_device /dev/dri/renderD128 -hwaccel_output_format vaapi \
    -i ./test_video.mp4 \
    -vf 'format=nv12,transpose_vaapi=2' \
    -c:v h264_vaapi \
    /tmp/rotated_video.mp4
[AVFilterGraph @ 0xf14000] No such filter: 'transpose_vaapi'
Error reinitializing filters!
Failed to inject frame into filter network: Invalid argument


  



  EDIT -

  



  Looking through the source code for vf_transpose_vaapi.c I see the following logic

  



      if (!pipeline_caps.rotation_flags) {
        av_log(avctx, AV_LOG_ERROR, "VAAPI driver doesn't support transpose\n");
        return AVERROR(EINVAL);
    }


  



  that's inside of the transpose_vaapi_build_filter_params function which is part of the filter initialization process. I guess it's possible that, if that call failed, the filter would fail to be built and it would not be registered as a valid filter ? This seems like something that would happen at runtime when I attempt to run the filter rather than something that would happen at compile time when setting which filters are defined.

  


• FFMPEG HTTP to RTP then RTP to HTTP with OPUS

  20 juin 2020, par Brad Hambleton

  I'm taking a HTTP output to FFMPEG and copying the audio (no video) to an RTP :
ffmpeg -i http://192.168.0.40:20110 -c:a copy -f rtp rtp ://192.168.87.40:20210 ?pkt_size=1328 -sdp_file opus.sdp

  


  At the other end receiving the RTP and pushing it back to HTTP :
ffmpeg -re -protocol_whitelist rtp,file,udp -i opus.sdp -c:a copy -listen 1 -method GET -f opus http://192.168.87.40:20220

  


  2 Problems :

  


  

  1. Currently the encoding process doesn't optimize packets.
92 1.004672 192.168.0.40 192.168.0.40 UDP 392 52954 → 20210 Len=332
93 1.004727 192.168.0.40 192.168.0.40 UDP 392 52954 → 20210 Len=332
94 1.004789 192.168.0.40 192.168.0.40 UDP 392 52954 → 20210 Len=332
95 1.004855 192.168.0.40 192.168.0.40 UDP 392 52954 → 20210 Len=332
96 1.004908 192.168.0.40 192.168.0.40 UDP 392 52954 → 20210 Len=332

  


  


  Each packet length is 332, which leaves a lot of wasted space. I'd like to get close to 1500 (Stack 4 together I get 1328 which is close enough)
Is there a command in the FFMPEG/RTP that will optimize packets ?
I added ?pkt_size=1328 to the RTP however that only sets max, not preferred.

  


  

  2. I get the following error when I try to HTTP to RTP via copy :
C :\Decode>ffmpeg -re -protocol_whitelist rtp,file,udp -i opus.sdp -c:a copy -listen 1 -method GET -f opus http://192.168.0.40:20220
ffmpeg version git-2020-05-23-26b4509 Copyright (c) 2000-2020 the FFmpeg developers
built with gcc 9.3.1 (GCC) 20200523
configuration : —enable-gpl —enable-version3 —enable-sdl2 —enable-fontconfig —enable-gnutls —enable-iconv —enable-libass —enable-libdav1d —enable-libbluray —enable-libfreetype —enable-libmp3lame —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libopenjpeg —enable-libopus —enable-libshine —enable-libsnappy —enable-libsoxr —enable-libsrt —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-libvmaf —enable-libvorbis —enable-libvo-amrwbenc —enable-libmysofa —enable-libspeex —enable-libxvid —enable-libaom —disable-w32threads —enable-libmfx —enable-ffnvcodec —enable-cuda-llvm —enable-cuvid —enable-d3d11va —enable-nvenc —enable-nvdec —enable-dxva2 —enable-avisynth —enable-libopenmpt —enable-amf
libavutil 56. 48.100 / 56. 48.100
libavcodec 58. 87.101 / 58. 87.101
libavformat 58. 43.100 / 58. 43.100
libavdevice 58. 9.103 / 58. 9.103
libavfilter 7. 83.100 / 7. 83.100
libswscale 5. 6.101 / 5. 6.101
libswresample 3. 6.100 / 3. 6.100
libpostproc 55. 6.100 / 55. 6.100
Input #0, sdp, from 'opus.sdp' :
Metadata :
title : No Name
Duration : N/A, start : 0.000000, bitrate : N/A
Stream #0:0 : Audio : opus, 48000 Hz, stereo, fltp
[opus @ 00000221a9a4d280] No extradata present
Could not write header for output file #0 (incorrect codec parameters ?) : Invalid data found when processing input
Stream mapping :
Stream #0:0 -> #0:0 (copy)
Last message repeated 1 times

  


  


  Tried a variety of additions to the RTP to HTTP CLI to get it to work, but still nothing.

  


  -flags -global_header -reconnect_streamed 1 -headers "X-Forwarded-For : 13.14.15.66"

  


  Is there a specific OPUS or HTTP header that can be added to get it to work. Decoding and Encoding does work for RTP to HTTP, the idea isn't to decode/encode at either point, just to copy the audio, change the container..

  


  Cheers

  


• ffmpeg conversion from MOV to mp4 - how to conserve creation date

  13 juin 2020, par jacobacci

  Windows 10 1909, latest updates.

  



  I am helping a friend move his photos and videos from one Apple ID to another.
I have downloaded all items to my PC using iCloud for PC. I then proceeded to re-upload all the photos to the new Apple ID.
2'000 of the videos are MOV, which I cannot upload to iCloud. I seem to need to convert them to mp4 in order to upload them.

  



  I have converted all of the MOVs to mp4 using the following batch

  



  FOR /F "tokens=*" %%G IN ('dir /b *.MOV') DO ffmpeg -i "%%G" -f mp4 -vcodec copy -acodec mp3 "%%~nG.mp4"


  



  This worked fine and I managed to upload the (now) mp4's to iCloud. Unfortunately all the mp4's now carry yesterday's date as creation date. In iCloud (and on the iPad) all the videos are now displayed with a creation date of 12.6.2020 and it is impossible to find a particular video. Also the context to the photos is lost.

  



  Question :

  



  

  • Is there any way to (batch) convert 2'000 MOV to mp4 while preserving the creation date ?

  


  • alternatively : is there any way to upload the original MOV files to iCloud ?