[FFmpeg-user] Having a hard time getting good results with mpeg2video

[MGislv]

Hi,

I'm trying to make a DVD with a still image (1:1 aspect ratio) and 
audio, the only issue is that the video is a bit blocky even after 
setting the highest bitrate available.


The command used:

`ffmpeg -i image.jpg -i audiofile.wav -f dvd -muxrate 10080k -packetsize 
2048 -pix_fmt yuv420p -r 24000/1001 -codec:v mpeg2video -g 18 -b:v 9800k 
-maxrate:v 9800k -minrate:v 9800k -bufsize:v 1835008 -vf 
"scale=720:576:flags=lanczos:force_original_aspect_ratio=decrease,pad=720:576:(ow-iw)/2:(oh-ih)/2" 
-codec:a pcm_dvd output.mpg`


FFmpeg version (latest from Arch repos):

`ffmpeg version n6.1.1 Copyright (c) 2000-2023 the FFmpeg developers
built with gcc 13.2.1 (GCC) 20230801
configuration: --prefix=/usr --disable-debug --disable-static 
--disable-stripping --enable-amf --enable-avisynth --enable-cuda-llvm 
--enable-lto --enable-fontconfig --enable-frei0r --enable-gmp 
--enable-gnutls --enable-gpl --enable-ladspa --enable-libaom 
--enable-libass --enable-libbluray --enable-libbs2b --enable-libdav1d 
--enable-libdrm --enable-libfreetype --enable-libfribidi --enable-libgsm 
--enable-libharfbuzz --enable-libiec61883 --enable-libjack 
--enable-libjxl --enable-libmodplug --enable-libmp3lame 
--enable-libopencore_amrnb --enable-libopencore_amrwb 
--enable-libopenjpeg --enable-libopenmpt --enable-libopus 
--enable-libplacebo --enable-libpulse --enable-librav1e --enable-librsvg 
--enable-librubberband --enable-libsnappy --enable-libsoxr 
--enable-libspeex --enable-libsrt --enable-libssh --enable-libsvtav1 
--enable-libtheora --enable-libv4l2 --enable-libvidstab --enable-libvmaf 
--enable-libvorbis --enable-libvpl --enable-libvpx --enable-libwebp 
--enable-libx264 --enable-libx265 --enable-libxcb --enable-libxml2 
--enable-libxvid --enable-libzimg --enable-nvdec --enable-nvenc 
--enable-opencl --enable-opengl --enable-shared --enable-version3 
--enable-vulkan
libavutil      58. 29.100 / 58. 29.100
libavcodec     60. 31.102 / 60. 31.102
libavformat    60. 16.100 / 60. 16.100
libavdevice    60.  3.100 / 60.  3.100
libavfilter     9. 12.100 /  9. 12.100
libswscale      7.  5.100 /  7.  5.100
libswresample   4. 12.100 /  4. 12.100
libpostproc    57.  3.100 / 57.  3.100`


I also played around with some hidden options but they didn't seem to 
make much difference:

`-trellis 1 -dia_size 2 -pre_dia_size 2 -precmp rd -cmp rd -subcmp rd 
-mbd rd -last_pred 3 -vqmin 0 -vqmax 0 -qmin 1 -qmax 1 -dc 11 -vstrict 0 
-mpv_flags '+mv0+cbp_rd+qp_rd' -lmin 1`