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ffmpeg-devel@ffmpeg.org

February 2021

95 participants
382 discussions

is there a trick to building ffmpeg with sdl2 2.0.14 ? (2.0.12 works)
by hydra3333＠gmail.com 01 Feb '21

01 Feb '21

When cross-compiling ffmpeg and sdl2 under ubuntu/mingw64 - ffmpeg builds with sdl2 2.0.12 ok however it fails to build with sdl2 2.0.14 If someone has done it, any advice on how to build with sdl2 2.0.14 would be appreciated.

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[PATCH v3] flac: add GIF image support
by leo60228 01 Feb '21

01 Feb '21

The FLAC specification requires GIF images to contain their number of colors. While I can't find a specific reference to that effect, I'm assuming that's why GIF images were previously unsupported. This was implemented by just writing AVPALETTE_COUNT for paletted images. --- This version no longer includes a changelog entry or accidentally adds a newline to existing code in flac_write_picture. This is identical to v2 except for fixing a mistake while submitting, sorry about that. libavformat/flacenc.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/libavformat/flacenc.c b/libavformat/flacenc.c index 1c983486aa..c9834b7d93 100644 --- a/libavformat/flacenc.c +++ b/libavformat/flacenc.c @@ -155,7 +155,10 @@ static int flac_write_picture(struct AVFormatContext *s, AVPacket *pkt) avio_wb32(pb, av_get_bits_per_pixel(pixdesc)); else avio_wb32(pb, 0); - avio_wb32(pb, 0); + if (st->codecpar->format == AV_PIX_FMT_PAL8) + avio_wb32(pb, AVPALETTE_COUNT); + else + avio_wb32(pb, 0); avio_wb32(pb, pkt->size); avio_write(pb, pkt->data, pkt->size); @@ -218,9 +221,6 @@ static int flac_init(struct AVFormatContext *s) if (!(st->disposition & AV_DISPOSITION_ATTACHED_PIC)) { av_log(s, AV_LOG_WARNING, "Video stream #%d is not an attached picture. Ignoring\n", i); continue; - } else if (st->codecpar->codec_id == AV_CODEC_ID_GIF) { - av_log(s, AV_LOG_ERROR, "GIF image support is not implemented.\n"); - return AVERROR_PATCHWELCOME; } else if (!c->write_header) { av_log(s, AV_LOG_ERROR, "Can't write attached pictures without a header.\n"); return AVERROR(EINVAL); -- 2.28.0

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