[Cin] New thread on bdwrite + mpeg2 HDV video

[Andrew Randrianasulu]

пн, 7 нояб. 2022 г., 19:10 Andrew Randrianasulu <randrianasulu at gmail.com>:

> Because old thread  now a bit too big for mobile gmail  client.
>
> Yes, I'll try to see if it fails same way on my end.
>
> code seems to check first 100 frames
>
>
> 2528 static int field_probe(AVFormatContext *fmt_ctx, AVStream *st)
> 2529 {
> 2530   AVDictionary *copts = 0;
> 2531   //av_dict_copy(&copts, opts, 0);
> 2532   AVCodecID codec_id = st->codecpar->codec_id;
> 2533 #if LIBAVCODEC_VERSION_INT <= AV_VERSION_INT(58,134,100)
> 2534   AVCodec *decoder = avcodec_find_decoder(codec_id);
> 2535 #endif
> 2536 #if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(59,16,100)
> 2537   const AVCodec *decoder = avcodec_find_decoder(codec_id);
> 2538 #endif
> 2539   AVCodecContext *ctx = avcodec_alloc_context3(decoder);
> 2540   if( !ctx ) {
> 2541     fprintf(stderr,"codec alloc failed\n");
> 2542     return -1;
> 2543   }
> 2544   avcodec_parameters_to_context(ctx, st->codecpar);
> 2545   if( avcodec_open2(ctx, decoder, &copts) < 0 ) {
> 2546     fprintf(stderr,"codec open failed\n");
> 2547     return -1;
> 2548   }
> 2549   av_dict_free(&copts);
> 2550
> 2551   AVFrame *ipic = av_frame_alloc();
> 2552   AVPacket ipkt;
> 2553   av_init_packet(&ipkt);
> 2554   int ilaced = -1;
> 2555   for( int retrys=100; --retrys>=0 && ilaced<0; ) {
> 2556     av_packet_unref(&ipkt);
> 2557     int ret = av_read_frame(fmt_ctx, &ipkt);
> 2558     if( ret == AVERROR_EOF ) break;
> 2559     if( ret != 0 ) continue;
> 2560     if( ipkt.stream_index != st->index ) continue;
> 2561     if( !ipkt.data || !ipkt.size ) continue;
> 2562     ret = avcodec_send_packet(ctx, &ipkt);
> 2563     if( ret < 0 ) {
> 2564       fprintf(stderr, "avcodec_send_packet failed\n");
> 2565       break;
> 2566     }
> 2567     ret = avcodec_receive_frame(ctx, ipic);
> 2568     if( ret >= 0 ) {
> 2569       ilaced = ipic->interlaced_frame ? 1 : 0;
> 2570       break;
> 2571     }
> 2572     if( ret != AVERROR(EAGAIN) )
> 2573       fprintf(stderr, "avcodec_receive_frame failed %d\n", ret);
> 2574   }
> 2575   av_packet_unref(&ipkt);
> 2576   av_frame_free(&ipic);
> 2577   avcodec_free_context(&ctx);
> 2578   return ilaced;
>
> may be we can add flags to force interlaced vs progressive to bdwrite ...
> and/or debug why it fails.
>
>
sorry, not m2t or m2ts files were found on my main harddrive, so blind shot!

Terje, can you recompile bdwrite with attached patch and see if it improves
situation?



>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.cinelerra-gg.org/pipermail/cin/attachments/20221107/3582c303/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0001-TEST-bdwrite-field_order.patch
Type: text/x-diff
Size: 843 bytes
Desc: not available
URL: <https://lists.cinelerra-gg.org/pipermail/cin/attachments/20221107/3582c303/attachment.bin>