151b4947e5
The padding data is assumed to be 0 in several places, notably in subtitles. This problem was not detected with fate-sub-srt test because the first element of the side data (x1) is 0 in the test, so the trailing side data present in the packet wasn't read by the decoder. The issue can be observed with a large enough x1. It is also noted in FF_INPUT_BUFFER_PADDING_SIZE doxy that MPEG bitstreams require that padding with 0, so it might fix other issues.
FFmpeg README ------------- 1) Documentation ---------------- * Read the documentation in the doc/ directory in git. You can also view it online at http://ffmpeg.org/documentation.html 2) Licensing ------------ * See the LICENSE file. 3) Build and Install -------------------- * See the INSTALL file.