[gyan]

Changelog:

- DXV DXT1 encoder

- LEAD MCMP decoder

- EVC decoding using external library libxevd

- EVC encoding using external library libxeve

- QOA decoder and demuxer

- aap filter

- demuxing, decoding, filtering, encoding, and muxing in the

- ffmpeg CLI now all run in parallel

- enable gdigrab device to grab a window using the hwnd=HANDLER syntax

- IAMF raw demuxer and muxer

- D3D12VA hardware accelerated H264, HEVC, VP9, AV1, MPEG-2 and VC1 decoding

- tiltandshift filter

- qrencode filter and qrencodesrc source

- quirc filter

- lavu/eval: introduce randomi() function in expressions

- VVC decoder (experimental)

- fsync filter

- Raw Captions with Time (RCWT) closed caption muxer

- ffmpeg CLI -bsf option may now be used for input as well as output

- ffmpeg CLI options may now be used as -/opt <path>, which is equivalent

- to -opt <contents of file <path>>

- showinfo bitstream filter

- a C11-compliant compiler is now required; note that this requirement

- will be bumped to C17 in the near future, so consider updating your

- build environment if it lacks C17 support

- Change the default bitrate control method from VBR to CQP for QSV encoders.

- removed deprecated ffmpeg CLI options -psnr and -map_channel

- DVD-Video demuxer, powered by libdvdnav and libdvdread

- ffprobe -show_stream_groups option

- ffprobe (with -export_side_data film_grain) now prints film grain metadata

- AEA muxer

- ffmpeg CLI loopback decoders

- Support PacketTypeMetadata of PacketType in enhanced flv format

- ffplay with hwaccel decoding support (depends on vulkan renderer via libplacebo)

- dnn filter libtorch backend

- Android content URIs protocol

- AOMedia Film Grain Synthesis 1 (AFGS1)

- RISC-V optimizations for AAC, FLAC, JPEG-2000, LPC, RV4.0, SVQ, VC1, VP8, and more

- Loongarch optimizations for HEVC decoding

- Important AArch64 optimizations for HEVC

- IAMF support inside MP4/ISOBMFF

- Support for HEIF/AVIF still images and tiled still images

- Dolby Vision profile 10 support in AV1

- Support for Ambient Viewing Environment metadata in MP4/ISOBMFF

- HDR10 metadata passthrough when encoding with libx264, libx265, and libsvtav1

[sorenjan]

First of, ffmpeg is amazing, I'm very thankful to everyone involved in it.

> dnn filter libtorch backend

What's ffmpeg's plan regarding ML based filters? When looking through the filter documentation it seems like filters use three different backends: tensorflow, torch, and openvino. Doesn't seem optimal, is there any discussion about consolidating on one backend?

ML filters need model files, and the filters take a path to a model file as one of their arguments. This makes them really difficult to use, if you're lucky you can find a suitable model and download somewhere, otherwise you need to find a separate model training project and dataset and run that first. Are there any plans on streamlining ML filters and model handling for ffmpeg? Maybe a model file repository with an option of installing these in an official models path on the system?

Most image and video research use ML now, but I don't get the impression that ffmpeg tries to integrate the modern technologies well yet. Being able to do for instance spatial and temporal super resolution using standard ffmpeg filters would be a big improvement, and I think things like automatic subtitles using whisper would be a good fit too. But it should start with a coherent ML strategy regarding inference backend and model management.

[deskamess]

> - ffmpeg CLI now all run in parallel

I think I read about this a few months ago but don't remember the details. What exactly does this do? Does it result in faster encoding/decoding if you have multiple filter graphs (for example a single cmd line that transcodes to new audio, extracts image, creates a low res)

> - ffmpeg CLI loopback decoders

No idea what this is...

Edit: threading => https://ffmpeg.org//index.html#cli_threading, loopback => https://ffmpeg.org/ffmpeg.html#Loopback-decoders

Loopback decoders are a nice concept. So could I use this to create a single ffmpeg command to extract images periodically (say 1/s) and then merge them into a horizontal strip (using the loopback decoder for this part)?

[gyan]

You don't need a loopback decoder for that. The periodic extraction will depend on a filter, and you can just clone and send the output of that filter to the tiling filter.

[Avamander]

> - D3D12VA hardware accelerated H264, HEVC, VP9, AV1, MPEG-2 and VC1 decoding

I wonder if this also means that Chrome and Edge will be able to use this acceleration for their ffmpeg backend (instead of relying on MediaFoundation)?

[ttyprintk]

And also, thank you for packaging.