From: Marton Balint <cus@passwd.hu>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: Re: [FFmpeg-devel] [PATCH v2 9/9] avformat/pcm: decrease target audio frame per sec to 10
Date: Thu, 14 Mar 2024 23:04:00 +0100 (CET)
Message-ID: <80cb4f84-da1a-0c65-5271-f174f28cfd67@passwd.hu> (raw)
In-Reply-To: <ca09d0bc-0b64-4e63-a578-a85d34d37f05@noa-archive.com>
On Thu, 14 Mar 2024, Tobias Rapp wrote:
> On 08/03/2024 01:53, Marton Balint wrote:
>
>> This makes the wav and pcm demuxer demux bigger packets, which is more
>> efficient.
>>
[...]
>> +0, 136000, 136000, 2000, 24000,
>> f952be1e1c7d48acd73d652ef4ea3aad
>> +0, 138000, 138000, 2000, 24000,
>> e42cbabef9d9675429dcb6fa28ce39f4
>> +0, 140000, 140000, 2000, 24000,
>> 9c6613b980bcbe9ebacbb6a492f53b16
>> +0, 142000, 142000, 2000, 24000,
>> 1882d1ae4b08fa7cc848eba60d645463
>> +0, 144000, 144000, 2000, 24000,
>> a361b56ba31c90557689631f0e7afc63
>> +0, 146000, 146000, 2000, 24000,
>> 341fbe24112c4060bb643750895a9041
>> +0, 148000, 148000, 2000, 24000,
>> 38340ef2ef764bb8007efe9cd0af54d7
>> +0, 150000, 150000, 2000, 24000,
>> 9b013a00bbedad211ba33326a3cfaa6e
>> +0, 152000, 152000, 2000, 24000,
>> 9d3469da4442cdfd2b8a5beacb789701
>> +0, 154000, 154000, 2000, 24000,
>> cf8e3880ecb46011328135dba1015044
>> +0, 156000, 156000, 2000, 24000,
>> 3be9fa7d0e0541269339ee032bda4021
>> +0, 158000, 158000, 2000, 24000,
>> ffd2646acf86524651416bc412afd846
>> +0, 160000, 160000, 2000, 24000,
>> 715163d8f82f007b1b6c42b06bd08b5a
>> +0, 162000, 162000, 1840, 22080,
>> c2079a237d021d7aa27e44acf979b1f0
>
> Noob question: Isn't a much larger total number of samples produced here?
The command line which generates the daud file specifies -frames:a 20, and
20 from bigger packets will cause a longer output file.
>
> Also it might be good to mention in the commit that the audio duration is
> less exact when using commands like "ffmpeg -i $INPUT -c:a copy -t 1.0
> $OUTPUT".
Ok, will add this to the commit message.
Regards,
Marton
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next prev parent reply other threads:[~2024-03-14 22:04 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-05 22:51 [FFmpeg-devel] [PATCH 1/9] avcodec/bsf/pcm_rechunk: reorder supported codec list Marton Balint
2024-03-05 22:51 ` [FFmpeg-devel] [PATCH 2/9] avcodec/bsf/pcm_rechunk: add some more supported PCM formats Marton Balint
2024-03-06 14:18 ` Stefano Sabatini
2024-03-05 22:51 ` [FFmpeg-devel] [PATCH 3/9] avformat/daudenc: force 2000 sample packet size with a bsf Marton Balint
2024-03-06 14:24 ` Stefano Sabatini
2024-03-05 22:51 ` [FFmpeg-devel] [PATCH 4/9] fate: make filter-channelsplit test use a fixed frame size Marton Balint
2024-03-05 22:51 ` [FFmpeg-devel] [PATCH 5/9] fate: use a fixed wav demux packet size for amix tests Marton Balint
2024-03-05 22:51 ` [FFmpeg-devel] [PATCH 6/9] fate: use atrim filter instead of -frames:a 20 for fate-filter-tremolo Marton Balint
2024-03-05 22:51 ` [FFmpeg-devel] [PATCH 7/9] avformat/pcm: use a common default packet size function for both wav and pcm Marton Balint
2024-03-06 20:37 ` Michael Niedermayer
2024-03-05 22:51 ` [FFmpeg-devel] [PATCH 8/9] avformat/pcm: remove max samples cap when calculating the default packet size Marton Balint
2024-03-05 22:51 ` [FFmpeg-devel] [PATCH 9/9] avformat/pcm: decrease target audio frame per sec to 10 Marton Balint
2024-03-06 13:47 ` [FFmpeg-devel] [PATCH 1/9] avcodec/bsf/pcm_rechunk: reorder supported codec list Stefano Sabatini
2024-03-08 0:53 ` [FFmpeg-devel] [PATCH v2 " Marton Balint
2024-03-08 0:53 ` [FFmpeg-devel] [PATCH v2 2/9] avcodec/bsf/pcm_rechunk: add some more supported PCM formats Marton Balint
2024-03-09 16:21 ` Stefano Sabatini
2024-03-08 0:53 ` [FFmpeg-devel] [PATCH v2 3/9] avformat/daudenc: force 2000 sample packet size with a bsf Marton Balint
2024-03-09 16:23 ` Stefano Sabatini
2024-03-08 0:53 ` [FFmpeg-devel] [PATCH v2 4/9] fate: make filter-channelsplit test use a fixed frame size Marton Balint
2024-03-08 0:53 ` [FFmpeg-devel] [PATCH v2 5/9] fate: use a fixed wav demux packet size for amix tests Marton Balint
2024-03-08 0:53 ` [FFmpeg-devel] [PATCH v2 6/9] fate: use atrim filter instead of -frames:a 20 for fate-filter-tremolo Marton Balint
2024-03-08 0:53 ` [FFmpeg-devel] [PATCH v2 7/9] avformat/pcm: factorize and improve determining the default packet size Marton Balint
2024-03-12 21:31 ` Marton Balint
2024-03-14 23:18 ` [FFmpeg-devel] [PATCH v3 " Marton Balint
2024-03-16 8:45 ` Marton Balint
2024-03-08 0:53 ` [FFmpeg-devel] [PATCH v2 8/9] avformat/wavdec: use ff_pcm_default_packet_size for " Marton Balint
2024-03-08 0:53 ` [FFmpeg-devel] [PATCH v2 9/9] avformat/pcm: decrease target audio frame per sec to 10 Marton Balint
2024-03-14 8:10 ` Tobias Rapp
2024-03-14 11:12 ` Paul B Mahol
2024-03-14 22:30 ` Marton Balint
2024-03-17 12:44 ` Paul B Mahol
2024-03-14 22:04 ` Marton Balint [this message]
2024-03-15 7:54 ` Tobias Rapp
2024-03-09 16:20 ` [FFmpeg-devel] [PATCH v2 1/9] avcodec/bsf/pcm_rechunk: reorder supported codec list Stefano Sabatini
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