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[209.85.166.45]) by smtp.gmail.com with ESMTPSA id o22sm28102912iow.52.2022.01.03.20.38.48 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 03 Jan 2022 20:38:48 -0800 (PST) Received: by mail-io1-f45.google.com with SMTP id y11so37482341iod.6 for ; Mon, 03 Jan 2022 20:38:48 -0800 (PST) X-Received: by 2002:a05:6638:258a:: with SMTP id s10mr22170639jat.65.1641271127825; Mon, 03 Jan 2022 20:38:47 -0800 (PST) MIME-Version: 1.0 References: <20220101192645.19849-1-cus@passwd.hu> In-Reply-To: From: Pierre-Anthony Lemieux Date: Mon, 3 Jan 2022 20:38:36 -0800 X-Gmail-Original-Message-ID: Message-ID: To: FFmpeg development discussions and patches Subject: Re: [FFmpeg-devel] [PATCH] avformat/mxfdec: support MCA audio information X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: FFmpeg development discussions and patches Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Archived-At: List-Archive: List-Post: On Sun, Jan 2, 2022 at 11:13 PM Andreas Rheinhardt wrote: > > Pierre-Anthony Lemieux: > > On Sat, Jan 1, 2022 at 5:35 PM Andreas Rheinhardt > > wrote: > >> > >> Pierre-Anthony Lemieux: > >>> Minor suggestion below. > >>> > >>> In addition, will sample file(s) be added to FATE? Below are two examples: > >>> > >>> http://ffmpeg-imf-samples-public.s3.us-west-1.amazonaws.com/callout_51_l_r_c_lfe_ls_rs.mxf > >>> http://ffmpeg-imf-samples-public.s3.us-west-1.amazonaws.com/callout_51_l_c_r_ls_rs_lfe.mxf > >>> > >> > >> These files are 1.62MiB each, having 49 packets of lossless audio. Would > >> it decrease coverage if this were reduced? After all, the amount of > >> audio should not matter for channel reorderings. > > > > Each channel contains a synthesized human voice that announces the > > name of the channel, so that a reviewer can, by simple inspection, > > confirm the expected channel order. This will be particularly useful > > when automatic channel reordering is performed. > > > > The contents of each channel could be changed to a single tone with > > each channel assigned a different tone, e.g. 1 to 6 kHz. This might > > make the files shorter. > > > > A human voice sounds like something that is nice to have; but does it > have to be 24bit? As I see it, mxf allows 16bit sound everywhere where > it allows 24bit. I have never seen or created an MXF file that uses MCA and that has 16-bit PCM. I do not recommend treading new ground. > Furthermore, the channels will still be recognizably > different if the audio is cut off at 1s (this will cut off the "effect" > from "low frequency effect" and will also cut off beeps for the others). Ok. See: http://ffmpeg-imf-samples-public.s3-website-us-west-1.amazonaws.com/callout_51_l_c_r_ls_rs_lfe.v2.mxf http://ffmpeg-imf-samples-public.s3-website-us-west-1.amazonaws.com/callout_51_l_r_c_lfe_ls_rs.v2.mxf > > - Andreas > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > To unsubscribe, visit link above, or email > ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe". _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".