[FFmpeg-user] FFv1: newer ffmpeg builds create larger files?

[Roger Pack]

> Absolutely.
> Same resolution, same pix_fmt, same framerate.
>
> Here's a copy of ffprobe's output on both, the original and its
> transcoded version:
>
> //-------------------------[Original]
> Input #0, avi, from 'bsp-00001-100.avi':
>  Metadata:
>    IARL            : bsp-00001
>    date            : 2012-03-11T02:49:06+01:00
>    track           : 101 / 185
>    encoder         : Lavf52.111.0
>  Duration: 00:01:00.00, start: 0.000000, bitrate: 60324 kb/s
>    Stream #0:0: Video: ffv1 (FFV1 / 0x31564646), yuv422p, 720x576, 25
> tbr, 25 tbn, 25 tbc
>    Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, 2
> channels, s16, 1536 kb/s
>
>
> //-------------------------[Transcoded]
> Input #0, avi, from 'bsp-00001-100-ffv1-yuv422p-l3_t8_s30-1_g01_c1_p2.avi':
>  Metadata:
>    IARL            : bsp-00001
>    date            : 2012-03-11T02:49:06+01:00
>    track           : 101 / 185
>    encoder         : Lavf54.6.101
>  Duration: 00:01:00.00, start: 0.000000, bitrate: 62267 kb/s
>    Stream #0:0: Video: ffv1 (FFV1 / 0x31564646), yuv422p, 720x576, SAR
> 16:15 DAR 4:3, 25 tbr, 25 tbn, 25 tbc
>    Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, 2
> channels, s16, 1536 kb/s

So I guess the question is what happened between  Lavf52.111.0 and
Lavf54.6.101 (I assume this is FFV1 lossless)?
Also why would they have differing bitrate's (or is this just an estimate)?
-r