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commit c4b7a51d3543bfb07a0f23dcc7bd870fabe7d497 Author: Link Mauve <[email protected]> AuthorDate: Tue Apr 28 17:49:25 2026 +0200 Commit: Link Mauve <[email protected]> CommitDate: Fri May 15 19:30:52 2026 +0000 avformat/mods: Parse the index entries This lets us seek in the video properly, based on the table at the end of the files, and has been tested with Suikoden Tierkreis videos. While at it I’ve also set the duration of the stream, this makes the progress bar work correctly in mpv. --- libavformat/mods.c | 29 ++++++++++++++++++++++++++--- 1 file changed, 26 insertions(+), 3 deletions(-) diff --git a/libavformat/mods.c b/libavformat/mods.c index 7f76124821..e18d89f220 100644 --- a/libavformat/mods.c +++ b/libavformat/mods.c @@ -3,6 +3,7 @@ * Copyright (c) 2015-2016 Florian Nouwt * Copyright (c) 2017 Adib Surani * Copyright (c) 2020 Paul B Mahol + * Copyright (c) 2026 Link Mauve * * This file is part of FFmpeg. * @@ -45,6 +46,9 @@ static int mods_read_header(AVFormatContext *s) AVIOContext *pb = s->pb; AVRational fps; int64_t pos; + int64_t timestamp; + int num_keyframes; + const AVIndexEntry *e; AVStream *st = avformat_new_stream(s, NULL); if (!st) @@ -53,6 +57,7 @@ static int mods_read_header(AVFormatContext *s) avio_skip(pb, 8); st->nb_frames = avio_rl32(pb); + st->duration = st->nb_frames; st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; st->codecpar->codec_id = AV_CODEC_ID_MOBICLIP; st->codecpar->width = avio_rl32(pb); @@ -64,11 +69,25 @@ static int mods_read_header(AVFormatContext *s) avio_skip(pb, 16); - pos = avio_rl32(pb) + 4; - avio_seek(pb, pos, SEEK_SET); pos = avio_rl32(pb); + num_keyframes = avio_rl32(pb); avio_seek(pb, pos, SEEK_SET); + for (int i = 0; i < num_keyframes; ++i) { + timestamp = avio_rl32(pb); + pos = avio_rl32(pb); + if (avio_feof(pb)) + return AVERROR_INVALIDDATA; + + av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME); + } + + e = avformat_index_get_entry(st, 0); + if (!e) + return AVERROR_INVALIDDATA; + + avio_seek(pb, e->pos, SEEK_SET); + return 0; } @@ -78,6 +97,7 @@ static int mods_read_packet(AVFormatContext *s, AVPacket *pkt) unsigned size; int64_t pos; int ret; + const AVIndexEntry *e; if (avio_feof(pb)) return AVERROR_EOF; @@ -87,7 +107,10 @@ static int mods_read_packet(AVFormatContext *s, AVPacket *pkt) ret = av_get_packet(pb, pkt, size); pkt->pos = pos; pkt->stream_index = 0; - pkt->flags |= AV_PKT_FLAG_KEY; + + e = avformat_index_get_entry_from_timestamp(s->streams[0], pos, 0); + if (e) + pkt->flags |= AV_PKT_FLAG_KEY; return ret; } _______________________________________________ ffmpeg-cvslog mailing list -- [email protected] To unsubscribe send an email to [email protected]
