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