[FFmpeg-devel] [PATCH v2 9/9] avformat/pcm: decrease target audio frame per sec to 10

[Marton Balint]

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