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<div class="moz-cite-prefix">Den 07.05.2025 01:04, skrev Andrew
Randrianasulu:<br>
</div>
<blockquote type="cite"
cite="mid:CA+rFky5n55COdNMPvyWzyLZUGB=9QdqKf+LxxFMTLPECp7P8ow@mail.gmail.com">
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<div dir="ltr" class="gmail_attr">ср, 7 мая 2025 г., 01:58
Terje J. Hanssen <<a
href="mailto:terjejhanssen@gmail.com"
moz-do-not-send="true" class="moz-txt-link-freetext">terjejhanssen@gmail.com</a>>:<br>
</div>
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div> <br>
<br>
<div>Den 06.05.2025 22:54, skrev Andrew Randrianasulu:<br>
</div>
<blockquote type="cite">
<div dir="auto">
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<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">вт, 6 мая 2025
г., 23:49 Terje J. Hanssen <<a
href="mailto:terjejhanssen@gmail.com"
target="_blank" rel="noreferrer"
moz-do-not-send="true"
class="moz-txt-link-freetext">terjejhanssen@gmail.com</a>>:<br>
</div>
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div> <br>
<br>
<div>Den 05.05.2025 16:05, skrev Andrew
Randrianasulu:<br>
</div>
<blockquote type="cite">
<div dir="auto">
<div><br>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">пн,
5 мая 2025 г., 17:00 Andrew
Randrianasulu <<a
href="mailto:randrianasulu@gmail.com" rel="noreferrer noreferrer"
target="_blank"
moz-do-not-send="true"
class="moz-txt-link-freetext">randrianasulu@gmail.com</a>>:<br>
</div>
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<div><br>
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<div class="gmail_quote">
<div dir="ltr"
class="gmail_attr">пн, 5
мая 2025 г., 16:26 Terje
J. Hanssen via Cin <<a
href="mailto:cin@lists.cinelerra-gg.org"
rel="noreferrer noreferrer noreferrer" target="_blank"
moz-do-not-send="true"
class="moz-txt-link-freetext">cin@lists.cinelerra-gg.org</a>>:<br>
</div>
<blockquote
class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div> I consider to make a
second preservation
backup for archiving my
Analog S-video and HDV
footages on tapes to
lossless compressed
FFV1.MKV files stored on
large USB3 expansion
disks. Also ffv1 HW
(vulkan) decoding (next
and encoding (later?)
are of interest in this
context.<br>
<br>
Related previous threads<br>
<a
href="https://www.mail-archive.com/cin@lists.cinelerra-gg.org/msg05547.html"
rel="noreferrer noreferrer noreferrer noreferrer" target="_blank"
moz-do-not-send="true"
class="moz-txt-link-freetext">https://www.mail-archive.com/cin@lists.cinelerra-gg.org/msg05547.html</a><br>
<a
href="https://www.mail-archive.com/cin@lists.cinelerra-gg.org/msg03791.html"
rel="noreferrer noreferrer noreferrer noreferrer" target="_blank"
moz-do-not-send="true"
class="moz-txt-link-freetext">https://www.mail-archive.com/cin@lists.cinelerra-gg.org/msg03791.html</a><br>
<a
href="https://www.mail-archive.com/cin@lists.cinelerra-gg.org/msg05547.html"
rel="noreferrer noreferrer noreferrer noreferrer" target="_blank"
moz-do-not-send="true"
class="moz-txt-link-freetext">https://www.mail-archive.com/cin@lists.cinelerra-gg.org/msg05547.html</a><br>
<br>
I adapt simply the last
ffmpeg mpeg-2 code line
to a first ffv1, version
3 test, 10 sec file<br>
<br>
ffmpeg -hide_banner -f
v4l2 -input_format
yuyv422 -video_size
720x576 -framerate 50 -i
/dev/video0 -f alsa -ac
2 -i hw:CARD=UHD,DEV=0
-c:v ffv1 -level 3 -c:a
pcm_s16le -t 10
720x576_50fps+alsa_ms2130_ffv1-3+pcm.mkv<br>
<blockquote>Input #0,
video4linux2,v4l2,
from '/dev/video0':<br>
Duration: N/A,
start: 351.803278,
bitrate: 331776 kb/s<br>
Stream #0:0: Video:
rawvideo (YUY2 /
0x32595559), yuyv422,
720x576, 331776 kb/s,
50 fps, 50 tbr, 1000k
tbn<br>
[aist#1:0/pcm_s16le @
0x555a99736cc0]
Guessed Channel
Layout: stereo<br>
Input #1, alsa, from
'hw:CARD=UHD,DEV=0':<br>
Duration: N/A,
start:
1746445045.742179,
bitrate: 1536 kb/s<br>
Stream #1:0: Audio:
pcm_s16le, 48000 Hz,
stereo, s16, 1536 kb/s<br>
Stream mapping:<br>
Stream #0:0 ->
#0:0 (rawvideo
(native) -> ffv1
(native))<br>
Stream #1:0 ->
#0:1 (pcm_s16le
(native) ->
pcm_s16le (native))<br>
Press [q] to stop, [?]
for help<br>
Output #0, matroska,
to
'720x576_50fps+alsa_ms2130_ffv1-3+pcm.mkv':<br>
Metadata:<br>
encoder :
Lavf61.7.100<br>
Stream #0:0: Video:
ffv1 (FFV1 /
0x31564646),
yuv422p(tv,
progressive), 720x576,
q=2-31, 200 kb/s, 50
fps, 1k tbn<br>
Metadata:<br>
encoder :
Lavc61.19.101 ffv1<br>
Stream #0:1: Audio:
pcm_s16le
([1][0][0][0] /
0x0001), 48000 Hz,
stereo, s16, 1536 kb/s<br>
Metadata:<br>
encoder :
Lavc61.19.101
pcm_s16le<br>
[out#0/matroska @
0x555a99736f40]
video:57467KiB
audio:1875KiB
subtitle:0KiB other
streams:0KiB global
headers:0KiB muxing
overhead: 0.069226%<br>
frame= 500 fps= 50
q=-0.0 Lsize=
59383KiB
time=00:00:10.00
bitrate=48646.9kbits/s
speed=0.998x <br>
</blockquote>
<br>
----------<br>
<br>
du -sh *<br>
58M
720x576_50fps+alsa_ms2130_ffv1-3+pcm.mkv<br>
<br>
----------<br>
<br>
ffprobe -hide_banner
720x576_50fps+alsa_ms2130_ffv1-3+pcm.mkv<br>
<blockquote>Input #0,
matroska,webm, from
'720x576_50fps+alsa_ms2130_ffv1-3+pcm.mkv':<br>
Metadata:<br>
ENCODER :
Lavf61.7.100<br>
Duration:
00:00:10.00, start:
0.000000, bitrate:
48646 kb/s<br>
Stream #0:0: Video:
ffv1 (FFV1 /
0x31564646),
yuv422p(tv,
progressive), 720x576,
50 fps, 50 tbr, 1k tbn<br>
Metadata:<br>
ENCODER :
Lavc61.19.101 ffv1<br>
DURATION :
00:00:10.000000000<br>
Stream #0:1: Audio:
pcm_s16le, 48000 Hz, 2
channels, s16, 1536
kb/s<br>
Metadata:<br>
ENCODER :
Lavc61.19.101
pcm_s16le<br>
DURATION :
00:00:10.000000000<br>
</blockquote>
<br>
------------ <br>
<br>
mediainfo
720x576_50fps+alsa_ms2130_ffv1-3+pcm.mkv<br>
<blockquote>General<br>
Unique
ID
:
158479793538002634101121179263279280827
(0x773A19163BEA6038DF448CE1529BB2BB)<br>
Complete
name
:
720x576_50fps+alsa_ms2130_ffv1-3+pcm.mkv<br>
Format : Matroska<br>
Format
version
: Version 4<br>
File
size
: 58.0 MiB<br>
Duration : 10 s 0 ms<br>
Overall bit rate
mode
: Variable<br>
Overall bit
rate
: 48.6 Mb/s<br>
Frame
rate
: 50.000 FPS<br>
Writing
application
: Lavf61.7.100<br>
Writing
library
: Lavf61.7.100<br>
ErrorDetectionType : Per level 1<br>
<br>
Video<br>
ID : 1<br>
Format : FFV1<br>
Format
version
: Version 3.4<br>
Format settings, Slice
count : 4
slices per frame<br>
Codec
ID
: V_MS/VFW/FOURCC /
FFV1<br>
Duration : 10 s 0 ms<br>
Bit rate
mode
: Variable<br>
Bit
rate
: 46.1 Mb/s<br>
Width : 720 pixels<br>
Height : 576 pixels<br>
Display aspect
ratio
: 5:4<br>
Frame rate
mode
: Constant<br>
Frame
rate
: 50.000 FPS<br>
Color
space
: YUV<br>
Chroma
subsampling
: 4:2:2<br>
Bit
depth
: 8 bits<br>
Scan
type
: Progressive<br>
Compression
mode
: Lossless<br>
Bits/(Pixel*Frame) : 2.225<br>
Stream
size
: 55.0 MiB (95%)<br>
Writing
library
: Lavc61.19.101 ffv1<br>
Default : No<br>
Forced : No<br>
Color
range
: Limited<br>
coder_type : Golomb Rice<br>
ErrorDetectionType : Per slice<br>
<br>
Audio<br>
ID : 2<br>
Format : PCM<br>
Format
settings
: Little / Signed<br>
Codec
ID
: A_PCM/INT/LIT<br>
Duration : 10 s 0 ms<br>
Bit rate
mode
: Constant<br>
Bit
rate
: 1 536 kb/s<br>
Channel(s) : 2 channels<br>
Sampling
rate
: 48.0 kHz<br>
Bit
depth
: 16 bits<br>
Stream
size
: 1.83 MiB (3%)<br>
Writing
library
: Lavc61.19.101
pcm_s16le<br>
Default : No<br>
Forced : No<br>
</blockquote>
---------------------------------<br>
<br>
As seen above the
"default" Chroma
subsampling is yuv422p
or 4:2:2 with Bit depth:
8 bits<br>
<br>
As ffv1 seemingly also
does support yuv422p10le
ffmpeg, I wonder if
yuv422p is limited by
the input from HDMI
capture/AV converter?<br>
Can possibly yuv422p10le
possibly be achieved by
adding -pix_fmt 10 og
similar syntax to the
ffmpeg line?<br>
</div>
</blockquote>
</div>
</div>
<div dir="auto"><br>
</div>
<div dir="auto">you can try
different -input_format, but I
suspect 10bit video over v4l2
at best uncommon ... While
hdmi itself supports 10bit
digital signal, I suspect
non-pro capture devices
usually limited to 8bit?</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
<br>
<blockquote type="cite">
<div dir="auto">
<div dir="auto"><a
href="https://git.ffmpeg.org/gitweb/ffmpeg.git/blob/HEAD:/libavdevice/v4l2-common.c"
rel="noreferrer noreferrer"
target="_blank"
moz-do-not-send="true"
class="moz-txt-link-freetext">https://git.ffmpeg.org/gitweb/ffmpeg.git/blob/HEAD:/libavdevice/v4l2-common.c</a></div>
<div dir="auto"><br>
</div>
<div dir="auto">I can't see 10bit yuy2
format listed here, so probably even
if hw/driver support it ffmpeg will
not ...</div>
</div>
</blockquote>
<br>
Yes, It seems this also is the case. <br>
Even I got a few 10-bits "-input_format"
y210 and p210 accepted by ffmpeg, in both
cases the output format "defaulted" to the
same 'yuv422p'.<br>
What also surprised me, the filesizes at the
same time also was reduced to 77%<br>
<br>
du -sh *<br>
45M
720x576_50fps_p210+alsa_ms2130_ffv1-3+pcm.mkv<br>
45M
720x576_50fps_y210+alsa_ms2130_ffv1-3+pcm.mkv<br>
58M
720x576_50fps_yuyv422+alsa_ms2130_ffv1-3+pcm.mkv<br>
</div>
</blockquote>
</div>
</div>
<div dir="auto"><br>
</div>
<div dir="auto">I guess they 10 bit but 4:2:0
subsampling?</div>
</div>
</blockquote>
<br>
Noop, according to mediainfo all have <br>
<br>
<font face="Courier New, Courier, monospace">Color
space : YUV<br>
Chroma subsampling : 4:2:2<br>
Bit depth : 8 bits<br>
</font></div>
</blockquote>
</div>
</div>
<div dir="auto"><br>
</div>
<div dir="auto">But this is *after* they left ffmpeg ;)</div>
<div dir="auto"><br>
</div>
<div dir="auto">All those auto-inserting filters may cut input
stream according to that user specified, and then expand it
back, but with less info, so lossless file will be smaller
....</div>
<div dir="auto"><br>
</div>
<div dir="auto">just idea, not proven.</div>
</div>
</blockquote>
<br>
=================<br>
<br>
I continue testing now with my Sony HDR-FX7E HDV 1080i50 camcorder,
currently using only the camera Enhanced Image processor (EIP) via
HDMI out.<br>
That is not HDV tape (MPEG-2) playback yet as mentioned above.<br>
<br>
v4l2-ctl -V<br>
Format Video Capture:<br>
Width/Height : 1920/1080<br>
Pixel Format : 'YUYV' (YUYV 4:2:2)<br>
Field : None<br>
Bytes per Line : 3840<br>
Size Image : 4147200<br>
Colorspace : sRGB<br>
Transfer Function : Rec. 709<br>
YCbCr/HSV Encoding: ITU-R 601<br>
Quantization : Default (maps to Limited Range)<br>
Flags : <br>
<br>
NB! v4l2 discovers the camcorder FX7 EIP's (Enhanced Imaging
Processor) FHD capability<br>
<br>
------------<br>
<br>
ffmpeg -hide_banner -f v4l2 -list_formats all -i /dev/video0<br>
<br>
[video4linux2,v4l2 @ 0x561a655c36c0] Raw : yuyv422
: YUYV 4:2:2 : 1920x1080 1600x1200 1360x768 1280x1024
1280x960 1280x720 1024x768 800x600 720x576 720x480 640x480<br>
[in#0 @ 0x561a655c3400] Error opening input: Immediate exit
requested<br>
Error opening input file /dev/video0.<br>
<br>
1) First encoding test:<br>
-----------------------------------<br>
ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size
1920x1080 -framerate 50 -i /dev/video0 -f alsa -ac 2 -i
hw:CARD=UHD,DEV=0 -c:v ffv1 -level 3 -c:a pcm_s16le -t 10
1920x1080_50fps_yuvy422+alsa_pcm_ffv1-3.mkv<br>
<br>
resulted i output file with 8-bit yuv422p as previously<br>
<br>
<br>
2) Second encoding test:<br>
----------------------------------------<br>
I specified 'y210' as both input format and as output pixel format.<br>
ffprobe below show this interestingly created a 10-bit "yuv422p10le"
output file as I wanted, and with a bit larger file size than first
test without output pixel_format filter!<br>
<br>
I wonder if this is better or a "fake" 10-bit color format?<br>
and wants comments to what really happends here:<br>
<br>
Is input via v4l2 a "raw camcorder video stream" that will be
(re-)encoded to a ffv1.mkv video file format?<br>
And does specifying -vf format=pix_fmts='y210' cause some extra
re-encoding than without specifying this output filter in this case?<br>
<br>
<br>
ffmpeg -hide_banner -f v4l2 -input_format y210 -video_size 1920x1080
-framerate 50 -i /dev/video0 -f alsa -ac 2 -i hw:CARD=UHD,DEV=0 -c:v
ffv1 -level 3 -vf format=pix_fmts='y210' -c:a pcm_s16le -t 10
1920x1080_50fps_y210+alsa_pcm_ffv1-3.mkv<br>
<blockquote>Input #0, video4linux2,v4l2, from '/dev/video0':<br>
Duration: N/A, start: 337.518694, bitrate: 1658880 kb/s<br>
Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422,
1920x1080, 1658880 kb/s, 50 fps, 50 tbr, 1000k tbn<br>
[aist#1:0/pcm_s16le @ 0x559f06e972c0] Guessed Channel Layout:
stereo<br>
Input #1, alsa, from 'hw:CARD=UHD,DEV=0':<br>
Duration: N/A, start: 1746635575.463474, bitrate: 1536 kb/s<br>
Stream #1:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s<br>
Stream mapping:<br>
Stream #0:0 -> #0:0 (rawvideo (native) -> ffv1 (native))<br>
Stream #1:0 -> #0:1 (pcm_s16le (native) -> pcm_s16le
(native))<br>
Press [q] to stop, [?] for help<br>
[ffv1 @ 0x559f06e7e280] bits_per_raw_sample > 8, forcing range
coder<br>
Output #0, matroska, to
'1920x1080_50fps_y210+alsa_pcm_ffv1-3.mkv':<br>
Metadata:<br>
encoder : Lavf61.7.100<br>
Stream #0:0: Video: ffv1 (FFV1 / 0x31564646), yuv422p10le(tv,
progressive), 1920x1080, q=2-31, 200 kb/s, 50 fps, 1k tbn<br>
Metadata:<br>
encoder : Lavc61.19.101 ffv1<br>
Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz,
stereo, s16, 1536 kb/s<br>
Metadata:<br>
encoder : Lavc61.19.101 pcm_s16le<br>
[out#0/matroska @ 0x559f06e97500] video:383046KiB audio:1875KiB
subtitle:0KiB other streams:0KiB global headers:0KiB muxing
overhead: 0.010893%<br>
frame= 500 fps= 50 q=-0.0 Lsize= 384963KiB time=00:00:10.00
bitrate=315361.7kbits/s speed=0.999x <br>
</blockquote>
<br>
---------------<br>
<br>
du -sh *.mkv<br>
<blockquote>376M 1920x1080_50fps_y210+alsa_pcm_ffv1-3.mkv<br>
374M 1920x1080_50fps_yuvy422+alsa_pcm_ffv1-3.mkv<br>
-----<br>
45M 720x576_50fps_p210+alsa_ms2130_ffv1-3+pcm.mkv<br>
45M 720x576_50fps_y210+alsa_ms2130_ffv1-3+pcm.mkv<br>
58M 720x576_50fps_yuyv422+alsa_ms2130_ffv1-3+pcm.mkv<br>
</blockquote>
<br>
--------------------<br>
<br>
ffprobe -hide_banner 1920x1080_50fps_y210+alsa_pcm_ffv1-3.mkv<br>
<br>
Input #0, matroska,webm, from
'1920x1080_50fps_y210+alsa_pcm_ffv1-3.mkv':<br>
Metadata:<br>
ENCODER : Lavf61.7.100<br>
Duration: 00:00:10.00, start: 0.000000, bitrate: 315361 kb/s<br>
Stream #0:0: Video: ffv1 (FFV1 / 0x31564646), yuv422p10le(tv,
progressive), 1920x1080, 50 fps, 50 tbr, 1k tbn<br>
Metadata:<br>
ENCODER : Lavc61.19.101 ffv1<br>
DURATION : 00:00:10.000000000<br>
Stream #0:1: Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536
kb/s<br>
Metadata:<br>
ENCODER : Lavc61.19.101 pcm_s16le<br>
DURATION : 00:00:10.000000000<br>
<br>
<br>
============================<br>
<br>
<br>
<br>
<blockquote type="cite"
cite="mid:CA+rFky5n55COdNMPvyWzyLZUGB=9QdqKf+LxxFMTLPECp7P8ow@mail.gmail.com">
<div dir="auto">
<div dir="auto">
<div class="gmail_quote gmail_quote_container">
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div><font face="Courier New, Courier, monospace"> <br>
</font>By the way, I acknowledge this limit at the hand.<br>
10-Bit Video is recommended for Analog Tape Transfer due
to color shades and branding<br>
<a
href="https://www.archivalworks.com/blog/10-bit-video-transfer"
target="_blank" rel="noreferrer"
moz-do-not-send="true" class="moz-txt-link-freetext">https://www.archivalworks.com/blog/10-bit-video-transfer</a><br>
<br>
But I expect also 8-bit 422 transfer to FFV1 opt for
some better quality than the current 8-bit 420 DV25
files (converted from PAL S-video) and the HDV.m2t
backup files. <br>
IMO direct playback of S-vdeo tapes has visual better
brightness than the converted DV files. <br>
It remains also to verify if playing 1080i50 HDV tapes
via HDMI will be up-scaled to 422 and 720p, according to
Steve Mullen' FX7 handbook. <br>
<br>
To continue I copy with from my old, initial post at<br>
<a
href="https://www.mail-archive.com/cin@lists.cinelerra-gg.org/msg05547.html"
target="_blank" rel="noreferrer"
moz-do-not-send="true" class="moz-txt-link-freetext">https://www.mail-archive.com/cin@lists.cinelerra-gg.org/msg05547.html</a><br>
<br>
<br>
Does all FFV1 level 3 versions work with lossless
compression for 422 video?<br>
<br>
I have not yet found a definitiv ffmpeg FFV1 v 3 syntax
guide for SD and HDV capturing and hope for suggestions
and comments regarding the examples below:<br>
<pre style="margin:0em"><font
face="Courier New, Courier, monospace">3.1 FFmpeg recipe (PAL)
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
3.2 Reference Example
<a href="https://trac.ffmpeg.org/wiki/Encode/FFV1#Examples"
target="_blank" rel="noreferrer" moz-do-not-send="true"
class="moz-txt-link-freetext">https://trac.ffmpeg.org/wiki/Encode/FFV1#Examples</a>
Copy audio "as-is" and use FFV1.3 as video codec.
</font></pre>
Parameters are 8 threads, coder=1, context=1,
GOP-size=1, 24 slices and slice-CRC on:<font
face="Courier New, Courier, monospace"><tt><br>
<br>
</tt></font>
<pre style="margin:0em"><font
face="Courier New, Courier, monospace"> ffmpeg -i <input_video> \
-acodec copy \
-vcodec ffv1 -level 3 \
-threads 8 \
-coder 1 \
-context 1 \
-g 1 \
-slices 24 \
-slicecrc 1 \
<output_video>
3.3 Various Encoding examples for Video capture from USB camera /dev/video0:
</font></pre>
<font face="Courier New, Courier, monospace">ffmpeg -f
v4l2 -framerate 25 -video_size 720x576 -i /dev/video0
output_data.mkv ffmpeg -f v4l2 -framerate 25
-video_size 720x576 -i /dev/video0 -codec:v ffv1
-codec:a pcm_s16le \ <br>
-f matroska output_video.mkv </font><br>
<font face="Courier New, Courier, monospace"> <br>
<br>
Check that video is captured properly using ffplay: <br>
<br>
ffmpeg -ar 44100 -thread_queue_size 1024 -f alsa -i
$AUDIO \ -r 25 -thread_queue_size 1024 -i $VIDEO \
-codec copy -f matroska - | ffplay <br>
<br>
</font><br>
- Check the overall flow using ffplay before capturing:
<br>
<font face="Courier New, Courier, monospace"><br>
ffmpeg -ar 44100 -thread_queue_size 1024 -f alsa -i
$AUDIO \ -itsoffset -0.5 -r 25 -thread_queue_size
1024 -i $VIDEO \ <br>
-filter_complex 'channelmap=FL-0' -filter_complex
'crop=w=700:h=556:x=8:y=0' \ <br>
-map 1:v -map 0:a -codec:v ffv1 -codec:a
pcm_s16le \ -f matroska - | ffplay -</font><br>
<br>
<font face="Courier New, Courier, monospace"><br>
<br>
</font><br>
<blockquote type="cite">
<div dir="auto">
<div dir="auto">why we can't have both ;) I mean, it
all depend on hw, and now board wired ... If there
was relatively popular capture board I am sure
someone tried to push core linux kernel bits
upstream ...</div>
<div dir="auto"><br>
</div>
<div dir="auto"><br>
</div>
<div dir="auto">but hw design is harder than it
looks.</div>
<div dir="auto"><br>
</div>
<div dir="auto"><br>
</div>
<div dir="auto">
<div class="gmail_quote">
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div> <br>
<br>
<blockquote type="cite">
<div dir="auto">
<div dir="auto"><br>
</div>
<div dir="auto">
<div class="gmail_quote">
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="auto">
<div dir="auto"><br>
</div>
<div dir="auto">But of course
you better to doublecheck what
v4l2 tools says ...</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
<br>
So far no other pixel formats found:<br>
<br>
v4l2-ctl -V <br>
Format Video Capture:<br>
Width/Height : 720/576<br>
Pixel Format : 'YUYV' (YUYV 4:2:2)<br>
Field : None<br>
Bytes per Line : 1440<br>
Size Image : 829440<br>
Colorspace : sRGB<br>
Transfer Function : Rec. 709<br>
YCbCr/HSV Encoding: ITU-R 601<br>
Quantization : Default (maps to
Limited Range)<br>
Flags : <br>
<br>
<br>
<br>
<blockquote type="cite">
<div dir="auto">
<div dir="auto">
<div class="gmail_quote">
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="auto">
<div dir="auto"><br>
</div>
<div dir="auto">Sorry for "too
generic" answer, few years ago
I/we looked into "direct RF
capture" and there getting
10bit signal was possible,
with custom hardware, slow
offline processing and
invasive hoockup to VCR's
internals.</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
<br>
Similar I bought and captured a few
ProRes422 HQ few files in 2016 with
Blackmagic Design's HyperDeck Shuttle+AD
miniconverter+SSD recorder.<br>
But some years later, BMD's fw support
became EOL, and the devices became
non-working :(<br>
<br>
<blockquote type="cite">
<div dir="auto">
<div dir="auto">
<div class="gmail_quote">
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="auto">
<div dir="auto"><br>
</div>
<div dir="auto">
<div class="gmail_quote">
<blockquote
class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div> <br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
</div>
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</blockquote>
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</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
<br>
</div>
</blockquote>
</div>
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</blockquote>
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