I am looking for an example of using libvpx-vp9 encoding from the FFmpeg
C libav* API. I have compiled libvpx and linked it in into ffmpeg (and
I can surely read vp9/webm files and can encode them with the ffmpeg
command-line utility)
I've tried:
https://ffmpeg.org/doxygen/6.0/encode_video_8c-example.html
with:
$ encode_video output.mp4 libvpx-vp9
$ encode_video output.webm libvpx-vp9
which wrote an .mp4 and a .webm file, but it is not readable by ffplay
or ffprobe.
$ ffprobe output.mp4
ffprobe version 6.0 Copyright (c) 2003-2023 the FFmpeg developers
built with gcc 11 (Ubuntu 11.4.0-1ubuntu1~22.04)
configuration:
--prefix=/home/gga/code/applications/mrv2/BUILD-Linux-amd64/Release/install
--enable-pic
--extra-cflags=-I/home/gga/code/applications/mrv2/BUILD-Linux-amd64/Release/install/include
--extra-cxxflags=-I/home/gga/code/applications/mrv2/BUILD-Linux-amd64/Release/install/include
--extra-objcflags=-I/home/gga/code/applications/mrv2/BUILD-Linux-amd64/Release/install/include
--extra-ldflags='"-L/home/gga/code/applications/mrv2/BUILD-Linux-amd64/Release/install/lib/"'
--extra-ldflags='"/home/gga/code/applications/mrv2/BUILD-Linux-amd64/Release/install/lib/libvpx.a"'
--extra-ldflags=-L/home/gga/code/applications/mrv2/BUILD-Linux-amd64/Release/install/lib
--extra-ldflags=-L/home/gga/code/applications/mrv2/BUILD-Linux-amd64/Release/install/lib64
--x86asmexe=/home/gga/code/applications/mrv2/BUILD-Linux-amd64/Release/install/bin/nasm
--enable-libvpx --enable-static --enable-shared
libavutil 58. 2.100 / 58. 2.100
libavcodec 60. 3.100 / 60. 3.100
libavformat 60. 3.100 / 60. 3.100
libavdevice 60. 1.100 / 60. 1.100
libavfilter 9. 3.100 / 9. 3.100
libswscale 7. 1.100 / 7. 1.100
libswresample 4. 10.100 / 4. 10.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f7900000c80] Format
mov,mp4,m4a,3gp,3g2,mj2 detected only with low score of 1, misdetection
possible!
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f7900000c80] moov atom not found
output.mp4: Invalid data found when processing input
$ ffprobe output.webm
ffprobe version 6.0 Copyright (c) 2007-2023 the FFmpeg developers
built with gcc 11 (Ubuntu 11.4.0-1ubuntu1~22.04)
configuration:
--prefix=/home/gga/code/applications/mrv2/BUILD-Linux-amd64/Release/install
--enable-pic
--extra-cflags=-I/home/gga/code/applications/mrv2/BUILD-Linux-amd64/Release/install/include
--extra-cxxflags=-I/home/gga/code/applications/mrv2/BUILD-Linux-amd64/Release/install/include
--extra-objcflags=-I/home/gga/code/applications/mrv2/BUILD-Linux-amd64/Release/install/include
--extra-ldflags='"-L/home/gga/code/applications/mrv2/BUILD-Linux-amd64/Release/install/lib/"'
--extra-ldflags='"/home/gga/code/applications/mrv2/BUILD-Linux-amd64/Release/install/lib/libvpx.a"'
--extra-ldflags=-L/home/gga/code/applications/mrv2/BUILD-Linux-amd64/Release/install/lib
--extra-ldflags=-L/home/gga/code/applications/mrv2/BUILD-Linux-amd64/Release/install/lib64
--x86asmexe=/home/gga/code/applications/mrv2/BUILD-Linux-amd64/Release/install/bin/nasm
--enable-libvpx --enable-static --enable-shared
libavutil 58. 2.100 / 58. 2.100
libavcodec 60. 3.100 / 60. 3.100
libavformat 60. 3.100 / 60. 3.100
libavdevice 60. 1.100 / 60. 1.100
libavfilter 9. 3.100 / 9. 3.100
libswscale 7. 1.100 / 7. 1.100
libswresample 4. 10.100 / 4. 10.100
[matroska,webm @ 0x55f3a6368d40] Format matroska,webm detected only with
low score of 1, misdetection possible!
[matroska,webm @ 0x55f3a6368d40] EBML header parsing failed
output.webm: Invalid data found when processing input
--
Gonzalo Garramuño
ggarr...@gmail.com
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