вт, 6 мая 2025 г., 23:15 Andrew Randrianasulu <randrianasulu@gmail.com>:

вт, 6 мая 2025 г., 23:10 Phyllis Smith via Cin <cin@lists.cinelerra-gg.org>:

Although the attached render file AVC_Intra_100.mp4 was checked in awhile ago, I have NOT been able to get AVC_Intra_100.mov to work on Fedora 32.  Error I get is:

[libx264 @ 0x7f9b9c0b1040]  8-bit AVC-Intra is not widely compatible
[libx264 @ 0x7f9b9c0b1040] 10-bit x264 is required to encode AVC-Intra
FFMPEG::open_encoder  err: Generic error in an external library
int FFMPEG::open_encoder(const char*, const char*):
open failed libx264:/tmp/hdrnmm.mov

If I delete the input line of "avcintra-class=100" which is perfectly legal per "view" it works, but then there is no point!

I think our ffmpeg accidently get headers from system's x264, probably compiled without 10bit support?  (this is strange, but Fedora! they cut codec support due to *patent* reasons because they operate in USA)

try to remove x264-devel from system and recompile cingg?

Or just check that Pixels set to yuv422p10le .... (may he i missed _that_ back in time )....

oh, I tried it on Termux and it was failing to set Pixels, so I discovered it had Windows line ends (^M in midnight commander's mcedit).

I deleted those and now profile works!

Attaching anew ..

On Fri, Mar 20, 2020 at 3:11 PM Andrew Randrianasulu <randrianasulu@gmail.com> wrote:

But not sure if I did this correctly.

https://en.wikipedia.org/wiki/AVC-Intra
says for AVC-Intra 100:

AVC-Intra 100:
nominally 100 Mbit/s, size of each frame is fixed
CAVLC entropy coding only.
All formats are High 4:2:2 Intra Profile, Level 4.1
4:2:2 chrominance sampling
frames are not scaled

and yeah, this French-language pdf actually says the same:
https://web.archive.org/web/20110720215759/http://www.ficam.fr/upload/documents/AVCIntra.pdf

                        50M                           100M
Standard                     MPEG-4 part10 AVC/H.264
Profile             High 10 Intra                 High 4:2:2 Intra
Level               Level 3.2/4.0                    Level 4.1
Resolution       1440x1080 / 960x720           1920x1080 / 1280x720
Sampling                4:2:0                          4:2:2
Bit rate               54Mbps                        111Mbps
Block size                         Y: 8x8, C: 4x4
Intra Prediction                Y: 9mode, C: 4mode
MBAFF                                   Yes
De-block filter                         No
Slice/frame                             10
Entropy coding        CABAC                          CAVLC

so, I looked up ffmpeg cmd line
https://trac.ffmpeg.org/ticket/3597

ffmpeg -v info -i /mnt-data/backup4/vol0/export/CUHK\ 2014-1/V017b.mov
-vcodec libx264 -intra -pix_fmt yuv422p10le -vb 100M -x264opts avcintra-class=100
-x264opts colorprim=bt709 -x264opts transfer=bt709 -x264opts colormatrix=bt709
-threads 4 -acodec copy V017b-ffmpeg-git-avcintra100.mov

Huh, said I and entered those params in opts file, actually in two files (mp4 and mov containers)

mov libx264
cin_pix_fmt=yuv422p10le
flags -global_header
keyint_min=0
x264-params=keyint=0:colorprim=bt709:transfer=bt709:colormatrix=bt709
avcintra-class=100
bufsize=100000000
level=4.1

mp4 libx264
cin_pix_fmt=yuv422p10le
flags -global_header
keyint_min=0
x264-params=keyint=0:colorprim=bt709:transfer=bt709:colormatrix=bt709
avcintra-class=100
bufsize=100000000
level=4.1

both for progressive content, for interlace you must add some more flags:
https://lists.ffmpeg.org/pipermail/ffmpeg-user/2017-January/035049.html

-flags +ildct+ilme
-x264opts interlaced=1

Also, there is still lack of (GUI) user notification if file writing failed due to
NO SPACE on device :}

FFStream::write_packet: write packet failed.
file:/dev/shm/avci_new.mp4
  err: На устройстве не осталось свободного места
FFStream::encode_frame: encode failed.
file: /dev/shm/avci_new.mp4
  err: На устройстве не осталось свободного места
FFStream::flush failed
:file:/dev/shm/avci_new.mp4
  err: Операция не позволена
Render::render_single: Session finished.
** rendered 273 frames in 85.585 secs, 3.190 fps
Render::render_single: Session finished.
** rendered 273 frames in 85.485 secs, 3.194 fps
Render::render_single: Session finished.
** rendered 273 frames in 82.176 secs, 3.322 fps

Profile sort of assumes you set project to some supported resolution, framerate, etc,
otherwise libx264 will fail with console error message.....

I found some talk about AVC-Ultra, there even was patch for x264, but it was not merged:
https://mailman.videolan.org/pipermail/x264-devel/2015-September/011412.html


Also, I think sound must be uncompressed, but I'm not sure.
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