[FFmpeg-user] ISSUE ABOUT libmp3lame AUDIO CODEC

Hervé ANSELME hervea95 at hotmail.com
Thu Feb 29 19:10:06 EET 2024

Here are the technical infos about the source movie (the file that will be processed), infos provided by VLC MEDIA PLAYER :

video stream :

      Codec: H264 - MPEG-4 AVC (part 10) (avc1)
      Resolution: 1920x834
      Display resolution: 1920x820
      Frame rate: 23.976215
      Decoded format: Planar 4:2:0 YUV

audio stream :

      Codec: A52 Audio (aka AC3) (a52 )
      Language: French
      Description: AC3-5.1-VFQ
      Sample rate: 48000 Hz

and here is the command line I use :

      ffmpeg.exe -loglevel error -sn -i "D:\temp\source movie.mkv" -map 0:v:0 -map 0:a:0 -acodec libmp3lame -ar 48k -b:a 128k -q:a 3 -vcodec libx265 -vf "scale=iw*2/5:ih*2/5" -sws_flags lanczos+accurate_rnd -b:v 1200k -minrate 1200k -maxrate 1200k -r 23976215/1000000 -qscale:v 2 -x265-params "nal-hrd=cbr:force-cfr=1:vbv-maxrate=1200:vbv-bufsize=2400"  -log_level -1 "C:\temp\re-encoded movie.mkv" -bufsize 2457600

I hope those infos will help.

From: ffmpeg-user <ffmpeg-user-bounces at ffmpeg.org> on behalf of Carl Zwanzig <cpz at tuunq.com>
Sent: Thursday, February 29, 2024 17:48
To: ffmpeg-user at ffmpeg.org <ffmpeg-user at ffmpeg.org>
Subject: Re: [FFmpeg-user] ISSUE ABOUT libmp3lame AUDIO CODEC

On 2/29/2024 8:09 AM, Hervé ANSELME wrote:
> Is this because my command line is missing some parameters, and if so, which ones ?

Hard to tell because you haven't included the _complete_ command line.

> Don't hesitate to let me know if you need any further technical
> information ; thank you in advance for your advice and help.
As before, always post the complete and uncut command and output (as _text_
in the email, not an attached image).

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