<div dir="auto">I was testing our libtheora encoder/muxer after updating to libtheora 1.2.0 and noticed that ffmpeg complains about "(non)keyframe not correctly marked"<div dir="auto"><br></div><div dir="auto">~/cinelerra/cinelerra-5.1 $ ffmpeg -i  ~/svt_t.ogg -f  null /dev/null                              </div><div dir="auto">ffmpeg version 7.1.1 Copyright (c) 2000-2025 the FFmpeg developers                                   </div><div dir="auto">built with Android (12470979, +pgo, +bolt, +lto, +mlgo, based on r522817c) clang version 18.0.3 (<a href="https://android.googlesource.com/toolchain/llvm-project" rel="noreferrer noreferrer" target="_blank">https://android.googlesource.com/toolchain/llvm-project</a> d8003a456d14a3deb8054cdaa529ffbf02d9b262)    configuration: --arch=aarch64 --as=aarch64-linux-android-clang --cc=aarch64-linux-android-clang --cxx=aarch64-linux-android-clang++ --nm=llvm-nm --ar=llvm-ar --ranlib=llvm-ranlib --pkg-config=/home/builder/.termux-build/_cache/android-r27c-api-24-v1/bin/pkg-config --strip=llvm-strip --cross-prefix=aarch64-linux-android- --disable-indevs --disable-outdevs --enable-indev=lavfi --disable-static --disable-symver --enable-cross-compile --enable-gnutls --enable-gpl --enable-version3 --enable-jni --enable-lcms2 --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libharfbuzz --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenmpt --enable-libopus --enable-librav1e --enable-librubberband --enable-libsoxr --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtheora --enable-libv4l2 --enable-libvidstab --enable-libvmaf --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-mediacodec --enable-opencl --enable-shared --prefix=/data/data/com.termux/files/usr --target-os=android --extra-libs=-landroid-glob --disable-vulkan --enable-neon --disable-libfdk-aac                                            libavutil      59. 39.100 / 59. 39.100                                                             </div><div dir="auto">libavcodec     61. 19.101 / 61. 19.101                                                             </div><div dir="auto">libavformat    61.  7.100 / 61.  7.100                                                             </div><div dir="auto">libavdevice    61.  3.100 / 61.  3.100                                                             </div><div dir="auto">libavfilter    10.  4.100 / 10.  4.100                                                             </div><div dir="auto">libswscale      8.  3.100 /  8.  3.100                                                             </div><div dir="auto">libswresample   5.  3.100 /  5.  3.100                                                             </div><div dir="auto">libpostproc    58.  3.100 / 58.  3.100                                                          </div><div dir="auto"> [ogg @ 0xb40000710c40f4d0] Broken file, keyframe not correctly marked.                            </div><div dir="auto"> Input #0, ogg, from '/data/data/com.termux/files/home/svt_t.ogg':                                    </div><div dir="auto">Duration: 00:00:13.44, start: 0.000000, bitrate: 658 kb/s                                          </div><div dir="auto">Stream #0:0: Video: theora, yuv420p(bt470bg/bt470bg/bt709), 1440x1080 [SAR 1333333:1000000 DAR 888894:500003], 25 tbr, 25 tbn                                                                             Metadata:                                                                                            </div><div dir="auto">ENCODER         : Cinelerra Infinity                                                       </div><div dir="auto">Stream mapping:                                                                                      Stream #0:0 -> #0:0 (theora (native) -> wrapped_avframe (native))                                </div><div dir="auto">Press [q] to stop, [?] for help                                                                    </div><div dir="auto">Output #0, null, to '/dev/null':                                                                     </div><div dir="auto">Metadata:                                                                                            encoder         : Lavf61.7.100                                                                   </div><div dir="auto">Stream #0:0: Video: wrapped_avframe, yuv420p(bt470bg/bt470bg/bt709, progressive), 1440x1080 [SAR 1333333:1000000 DAR 888894:500003], q=2-31, 200 kb/s, 25 fps, 25 tbn                                     </div><div dir="auto">Metadata:                                                                                            encoder         : Lavc61.19.101 wrapped_avframe                                            </div><div dir="auto">[ogg @ 0xb40000710c40f4d0] Broken file, keyframe not correctly marked.                             </div><div dir="auto">[ogg @ 0xb40000710c40f4d0] Broken file, keyframe not correctly marked.=8.24x                           </div><div dir="auto">Last message repeated 1 times                                                                  </div><div dir="auto">[ogg @ 0xb40000710c40f4d0] Broken file, non-keyframe not correctly marked.                             </div><div dir="auto">Last message repeated 36 times                                                                 </div><div dir="auto">[ogg @ 0xb40000710c40f4d0] Broken file, non-keyframe not correctly marked.9x                           </div><div dir="auto">Last message repeated 58 times                                                                </div><div dir="auto"> [out#0/null @ 0xb4000070bc40f7f0] video:144KiB audio:0KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: unknown                                                               </div><div dir="auto">frame=  336 fps=264 q=-0.0 Lsize=N/A time=00:00:13.44 bitrate=N/A speed=10.6x                      </div><div dir="auto"><br></div><div dir="auto">I found this recent bug on libtheora gitlab, not sure if last comment is true or misses something when it comes to ffmpeg?</div><div dir="auto"><br></div><div dir="auto"><a href="https://gitlab.xiph.org/xiph/theora/-/issues/2311" rel="noreferrer noreferrer noreferrer" target="_blank">https://gitlab.xiph.org/xiph/theora/-/issues/2311</a></div><div dir="auto"><br></div><div dir="auto">some other search hits:</div><div dir="auto"><br></div><div dir="auto"><a href="https://progress.opensuse.org/issues/42047" target="_blank" rel="noreferrer">https://progress.opensuse.org/issues/42047</a></div><div dir="auto"><br></div><div dir="auto"><a href="https://github.com/Enselic/recordmydesktop/issues/23">https://github.com/Enselic/recordmydesktop/issues/23</a></div><div dir="auto"><br></div><div dir="auto"><br></div></div>