Thank you for the reply . I think you are right about the hardware
encoder . I have encoded the video with libx264 and the output file was
189MB. Do you know what is the difference between nvenc_h264 and
h264_nvenc encoders ?
On 7.09.2017 17:09, Cley Faye wrote:
2017-09-07 15:57 GMT+02:00 Daniel <5960...@gmail.com>:
Hello Everyone,
I have tried to convert some videos to mp4 format what has surprised me
was the size of the videos, After the conversion some videos were 2,3,4
times bigger then the original wmv files. Here is the command i used to
convert : /usr/local/bin/ffmpeg -i video500.wmv -c:a libfdk_aac -c:v
nvenc_h264 video500.mp4 ; After this command the mp4 file is 630MB and
the wmv file is 150MB (you can find attached the ffprobe to bothe files).
If you can suggest any way on how to keep the quality and make the mp4
files smaller please let me know .
ps: On some mp4 videos the bitrate has doubled have no idea why ?
If you don't supply your own settings, ffmpeg (and/or the underlying
codec) will assume some default values, not necessarily in compliance with
the input. In your case, you probably want (at least) to set the bitrate.
Also, I think that hardware encoder tend to produce bigger file for same
quality (and worse quality for same size), but this might not be accurate
anymore.
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