On 08-09-2025 15:26, Carlos E. R. via ffmpeg-user wrote:
On 2025-09-08 07:51, Ferdi Scholten via ffmpeg-user wrote:
On 06-09-2025 23:44, Carlos E. R. via ffmpeg-user wrote:
It also clearly says to use the most recent if you can, 3.x is
positively ancient! try something built in the last six months.
I have whatever the distribution provides. I have just looked and
found ffmpeg-4, will try that one.
Please stop using antique versions....
FFmpeg is currently on version 8.0, use that or at least any of the
7.x series if you want support.
These ancient versions are often feature incomplete or even
incompatible for today's codecs. They don't get updated, only the
occasional bugfix (like correcting typo's in the documentation....)
Also because of the fact that from version 7.0 the api has changed,
breaking compatibility with older versions. Mostly since then, the
speed has greatly increased (because of the new multithreading
abilities) and support for modern codecs got a lot better.
I had no idea there was a version 8, now searching for it I see it.
As you say the api has changed, could you suggest a command line for
doing the conversion? Similar to:
ffmpeg -i movie.mkv \
-vf "scale=-1:802,format=yuv420p" -c:v libx264 -preset fast -crf
22 -tune fastdecode -profile:v main -c:a copy -c:s copy \
output.mkv
but with 2 subtitle streams. I get audio not supported on VLC, and
only one subtittle stream. On version 3 and 4, same line gets working
audio, and one subtittle stream. Attempts to produce the two
subtittles on version 4 killed the audio.
Tried also this concoction suggested by chatgpt, VLC also refuses to
play the audio but generates the two subtittles:
ffmpeg -i movie.mkv -vf "scale=-1:802,format=yuv420p" -map 0 -c:v
libx264 -preset fast -crf 22 -tune fastdecode -profile:v main -c:a aac
-b:a 192k -c:s copy -disposition:a:0 default 8c_movie.mkv
This looks pretty good to me, bt I would personally drop the
"-disposition:a:0 default" from it and use libopus instead of aac
So replace "-c:a aac -b:a 192k" with "-c:a libopus -ac 6"
Your VLC seems to have a problem with eac and aac codecs as both error
out that is why I suggest opus instead (it also is better quality as aac)
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