Den 07.08.2024 21:38, skrev Phyllis Smith via Cin:
g=30
keyint_min=30
Seems to work for av1.webm format -- still testing. I want to test
Andrew's suggestions next.
On Wed, Aug 7, 2024 at 1:18 PM Andrew Randrianasulu
<[email protected]> wrote:
On Wed, Aug 7, 2024 at 9:13 PM Phyllis Smith via Cin
<[email protected]> wrote:
>
> Summary is that the error message is due to lack of keyframes
and the workaround is to use Transcode.
> BUT hopefully a better solution with the Render format
parameters can be found. The render fix for h264/h265 formats is
the addition of the lines below (which obviously is not pertinent
to av1). I will see if I can find an alternative, but might not.
aomenc --help mentions
--kf-min-dist=<arg> Minimum keyframe interval (frames)
--kf-max-dist=<arg> Maximum keyframe interval (frames)
and there seems to be way (aom-params) to pass libaom specific options
via ffmpeg's ...
so ..
aom-params=kf-min-dist=25:kf-max-dist=25 ?
for svt-av1 you hopefully can use just keyint= with svtav1-params
line?
command line svt av1 encoder seems to default for 5 seconds?
Also, may be add keyint_min=25 (for 25 fps vid) as generic libav*
(ffmpeg) option
>>
>> # use framerate for 1 keyframe/sec, needed for seeks
>> keyint_min=25 (or keyint_min=30 for x265)
>> x264-params=keyint=25 (or x265-params-keyint=30 for x265)
>
>
> About the error message:
>>
>> FFStream::seek:
/run/media/terje/Videoklipp/Cineform/av1_yuv422p10le_LP.webm
>> retry limit, pos=207 tstmp=8280, err: Input/output error
>> ** seek fail 207, 8280
>
>
> Seeking Issues
(https://cinelerra-gg.org/download/CinelerraGG_Manual/Seeking_Issues.html)
>>
>> If you have an issue playing a video and not seeing it in the
Compositor (just see a black
>> screen), it is most likely due to the media not being designed
to be editable. It is most likely
>> not damaged. Generally it just does not have keyframes which
are needed for seeking
>> which is what is done when you move around the media and start
playing in the middle.
>> The media plays just fine in the compositor if you always play
from the beginning because
>> then you don’t need keyframes to seek. You can get around this
problem if you proxy the
>> media. A good choice to use for the proxy would be use scalar,
ffmpeg/mp4 and size of 1/2.
>>
>> The proxied media can then seek and you will see it play in the
compositor because keyframes exist.
>
> Or use TRANSCODE which adds keyframes when media is not seekable
(see Manual for details). This is particularly useful for the mkv
container, which often has seek problems.
>
> Just a reminder about the message below.
>>
>> FFMPEG::open_decoder: some stream times estimated:
>
> This is not a problem. Basically, when you open a file if a
stream has a known duration, there is no message. If the duration
is unknown, it is estimated by using the File Size and Bitrate to
estimate the duration.
> ----------------------------------------
@Andrew, @Phyllis
Thank for your comments and suggestions, which I so far only have read
while doing some alternative testing.
First, to ensure this was correct understood:
I didn't notice the same error messages using the same input file and
rendering to h265.mp4 and h264.mp4
Now I have also tried to render the same input file using the (4.3x
faster) av1_svt, but with the available 8-bit color depth in 10-bit mode:
17M av1_svt_yuv420p10le_SR.webm
Below follows output messages with no error messages, so yes, I think
some preset parameters possibly should be added to the av1_aom.webm:
FFMPEG::open_decoder: some stream times estimated:
/Videoklipp/Cineform/cfhd01.mkv
Svt[info]: -------------------------------------------
Svt[info]: SVT [version]: SVT-AV1 Encoder Lib v1.8.0
Svt[info]: SVT [build] : GCC 10.3.1 20210422 (Red Hat
10.3.1-1) 64 bit
Svt[info]: LIB Build date: Jul 31 2024 07:22:12
Svt[info]: -------------------------------------------
Svt[info]: Number of logical cores available: 20
Svt[info]: Number of PPCS 76
Svt[info]: [asm level on system : up to avx2]
Svt[info]: [asm level selected : up to avx2]
Svt[info]: -------------------------------------------
Svt[info]: SVT [config]: main profile tier (auto) level (auto)
Svt[info]: SVT [config]: width / height / fps numerator / fps
denominator : 1920 / 1080 / 25 / 1
Svt[info]: SVT [config]: bit-depth / color format : 10 / YUV420
Svt[info]: SVT [config]: preset / tune / pred struct : 10 /
PSNR / random access
Svt[info]: SVT [config]: gop size / mini-gop size / key-frame type
: 161 / 16 / key frame
Svt[info]: SVT [config]: BRC mode / rate factor : CRF / 35
Svt[info]: -------------------------------------------
FFMPEG::open_decoder: some stream times estimated:
/Videoklipp/Cineform/cfhd01.mkv
Render::render_single: Session finished.
** rendered 1780 frames in 51.541 secs, 34.536 fps
FFMPEG::open_decoder: some stream times estimated:
/Videoklipp/Cineform/av1_svt_yuv420p10le_SR.webm
FFMPEG::open_decoder: some stream times estimated:
/Videoklipp/Cineform/av1_svt_yuv420p10le_SR.webm
FFMPEG::open_decoder: some stream times estimated:
/Videoklipp/Cineform/av1_svt_yuv420p10le_SR.webm
FFMPEG::open_decoder: some stream times estimated:
/Videoklipp/Cineform/cfhd01.mkv
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