Hello Hendrik, Thank you very much for the bugreport, I believe I will able to fix all these issues quick. In general all these issues are known and in my todo list.
Monday, August 3, 2015, 3:18:04 PM, you wrote: HL> Hey, HL> after a discussion on IRC about the declining quality of the QSV HL> decoders, I decided to do actual tests and document the results, so we HL> can get these fixed. HL> A lot of these issues are regressions from recent changes, and work HL> fine in the original qsv decoders merged from libav, so they should be HL> given extra attention. HL> 1) HL> Content with frame size changes is not handled at all. HL> A change to a smaller frame size will result in image corruption, and HL> a change to a bigger frame size will cause decoding to fail entirely. HL> Sample (large to small): HL> http://fate-suite.ffmpeg.org/h264/reinit-large_420_8-to-small_420_8.h264 HL> In this case, as hardware buffers are re-used, the images after the HL> change to a smaller size result in showing parts of the old image and HL> the new smaller image in the top left corner instead. HL> 2) HL> Seeking is broken. For some reason refactoring of the qsv decoders has HL> resulted in their flush functions to become void. Seeking using ffplay HL> and the qsv decoder results in serious playback disruption. HL> 3) HL> AV_PIX_FMT_QSV output is no longer functional. Refactoring has removed HL> the ff_get_format call, which results in API users no longer being HL> able to select the QSV pix fmt. HL> These 3 issues are regression from the original decoder, and should be HL> corrected before further decoders are merged. As additional code using HL> the common qsv may require further changes in the future, its best to HL> fix the common code before adding even more. HL> I'll make sure to review future qsv patches more actively to hopefully HL> avoid big regressions like these in the future as well. I have a HL> system setup now to test qsv, so that should be easier in the future. HL> - Hendrik -- Best regards, Ivan mailto:ivan.us...@nablet.com _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
