Den 26.12.2021 21:13, skrev Andrew Randrianasulu via Cin:
On Sunday, December 26, 2021, Phyllis Smith via Cin
<[email protected]> wrote:
for now it seems only ffv1.avi defaults to v.0 and mkv
defaults to 3.4
For now, how about if I just add a comment to ffv1.mkv about level
numbers? That way the user will see this if they look and can
decide for themselves. Otherwise if we make every possible
setting available we will end up with millions of choices and then
if we have new ones labeled _3, when level 4 comes along we would
need even more as _4.
ok, add comment please}
Ok, maybe I'm thinking aload quite "outside the box" here with my
questions * below:
I seems for me Cin-GG supports ffv1.mkv in two instances (did't find
other mentioned in the manual either):
1) File > Save as: ffv1.mkv (that is save current edited video from
Cin-GG)
and
2) File > Record
using Video compression according to
Settings > Preferences > Record
File format: FFMPEG mkv
Video wrench: Compression: ffv1.mkv or user_ffv1.mkv
* Could i.e the empty <Format box> here be used to input levels
and/or other user options?
Further down on this window
Video IN
Record driver: i.e Video4Linux
* Or possibly get BM Intensity/declink SDK card working/integrated
with ffmpeg/Cin-GG?
* Get the option to preserve/archive transcoded ffv1.mkv directly
to a storage device?
* And/or get the option to load /pipe (uncompressed) video files
recorded on one storage (SSD) device,
compress it with the right preset ffv1.mkv and save it to another
storage device.
On Sat, Dec 25, 2021 at 9:29 PM Andrew Randrianasulu via Cin
<[email protected]> wrote:
On Sunday, December 26, 2021, Terje J. Hanssen via Cin
<[email protected]> wrote:
Den 25.12.2021 17:35, skrev Andrew Randrianasulu via Cin:
seems to miss level=3 setting
$ cat bin/ffmpeg/video/ffv1.avi
avi ffv1
$ cat bin/ffmpeg/video/ffv1.mkv
matroska ffv1
threads=8
context=1
slices=30
$ cat bin/ffmpeg/video/ffv1.mov
mov ffv1
#coder=0
context=1
g=1
level=3
threads=16
slices=16
slicecrc=1
#pass=2
$
not sure if we should modify our avi/mkv profikes or
add new (may be with _v3 name) ones?
Without own experience yet, I would ask if there any
reason to not use the latest and more feature rich FFV1
level=version 3? Backward compitibility, typical can v. 3
uncompress v. 1 compressed archives?
good question... I have older avplay (~2012) here and will test.
for now it seems only ffv1.avi defaults to v.0 and mkv
defaults to 3.4 due to crc protection per slice, i think
(looked into ffmpeg encoder source)
{filenames were just that I had in inputbox, not indicative of
content}
$ mediainfo ~/h265-p2.avi
General
Complete name : /data/data/com.termux/files/home/h265-p2.avi
Format : AVI
Format/Info : Audio Video Interleave
File size : 8.82 MiB
Duration : 3 s 720 ms
Overall bit rate mode : Variable
Overall bit rate : 19.9 Mb/s
Writing application : Lavf58.76.100
Video
ID : 0
Format : FFV1
Format version : Version 0
Codec ID : FFV1
Duration : 3 s 720 ms
Bit rate mode : Variable
Bit rate : 19.9 Mb/s
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 5:4
Frame rate : 25.000 FPS
Standard : PAL
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Compression mode : Lossless
Bits/(Pixel*Frame) : 1.916
Stream size : 8.81 MiB (100%)
coder_type : Golomb Rice
$ mediainfo ~/h265-p2.mkv
General
Unique ID : 3614689160526176147752985704114819283
(0x2B829EF6988D4EEDCB446A8612210D3)
Complete name : /data/data/com.termux/files/home/h265-p2.mkv
Format : Matroska
Format version : Version 4
File size : 7.48 MiB
Duration : 3 s 80 ms
Overall bit rate mode : Variable
Overall bit rate : 20.4 Mb/s
Writing application : Lavf58.76.100
Writing library : Lavf58.76.100
ErrorDetectionType : Per level 1
Video
ID : 1
Format : FFV1
Format version : Version 3.4
Codec ID : V_MS/VFW/FOURCC / FFV1
Duration : 3 s 80 ms
Bit rate mode : Variable
Bit rate : 20.0 Mb/s
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 5:4
Frame rate mode : Constant
Frame rate : 25.000 FPS
Standard : PAL
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Compression mode : Lossless
Bits/(Pixel*Frame) : 1.927
Stream size : 7.34 MiB (98%)
Default : Yes
Forced : No
Color range : Full
Matrix coefficients : BT.470 System B/G
coder_type : Golomb Rice
MaxSlicesCount : 30
ErrorDetectionType : Per slice
I conclude that a couple of referense papers on the web
say and use level 3 in their profile/presets:
1) Video into Matroska/FFV1
https://avpres.net/FFmpeg/im_FFV1.html
<https://avpres.net/FFmpeg/im_FFV1.html>
We advise to use only the version 3 of FFV1 in production,
because the version 1 is deprecated, the version 2 has
never really existed, and the version 4 is currently under
development.
Transcode a video file using the FFV1 codec into the
Matroska container for preservation purposes.
Solution
ffmpeg \
-i input_file \
-c:v ffv1 \
-level 3 \
-coder 1 \
-context 1 \
-g 1 \
-slices 24 \
-slicecrc 1 \
-c:a copy \
output_file.mkv
2) Presets for FFV1 and MKV: Choosing the right parameters
for the job (ffv1_params.pdf)
https://docs.google.com/viewer?url=https%3A%2F%2Fmediaarea.net%2FEvents%2F2019-12-05_NoTimeToWait4%2F03.%2520Peter%2520B.%2520-%2520Presets%2520for%2520FFV1%2520and%2520MKV%2C%2520Choosing%2520the%2520right%2520parameters%2520for%2520the%2520job%2Fffv1_params.pdf&pdf=true
<https://docs.google.com/viewer?url=https%3A%2F%2Fmediaarea.net%2FEvents%2F2019-12-05_NoTimeToWait4%2F03.%2520Peter%2520B.%2520-%2520Presets%2520for%2520FFV1%2520and%2520MKV%2C%2520Choosing%2520the%2520right%2520parameters%2520for%2520the%2520job%2Fffv1_params.pdf&pdf=true>
Level = FFV1 version
page 9 (of 30)
0
1 (Default)
3 (Recommended)
FFmpeg recipe (PAL)
page 27 (of 30)
ffmpeg -i VIDEO_IN \
-c:v ffv1 -level 3 -coder 1 -context 0 -slices 24
-slicecrc 1 \
-color_primaries bt470bg \
-color_trc bt709 \
-colorspace bt470bg \
-color_range mpeg \
-map 0 \
-top 1 \
-c:a copy \
-g 1 -pix_fmt + \
VIDEO_OUT.mkv
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