ffmpeg_mux: failed to stage audio; producing silent video\n

Error message

ffmpeg_mux: failed to stage audio; producing silent video\n

What it means

Staging the audio track for muxing failed, so a silent video is produced. Guard: log the underlying cause and surface a warning to the caller so silent output is not mistaken for success.

Source

Thrown at backend/go/stablediffusion-ggml/cpp/gosd.cpp:1232

    int height = (int)frames[0].height;
    int channels = (int)frames[0].channel;
    const char* pix_fmt_in = (channels == 4) ? "rgba" : "rgb24";

    char size_str[32];
    char fps_str[32];
    snprintf(size_str, sizeof(size_str), "%dx%d", width, height);
    snprintf(fps_str, sizeof(fps_str), "%d", fps);

    // Optional audio: write a temp WAV file if the model produced audio.
    char wav_path[64] = {0};
    bool have_audio = false;
    if (audio && audio->data && audio->sample_count > 0 && audio->channels > 0 && audio->sample_rate > 0) {
        if (write_planar_float_wav(audio, wav_path, sizeof(wav_path)) == 0) {
            have_audio = true;
            fprintf(stderr, "ffmpeg_mux: audio %u Hz × %u ch × %" PRIu64 " frames → %s\n",
                    audio->sample_rate, audio->channels, audio->sample_count, wav_path);
        } else {
            fprintf(stderr, "ffmpeg_mux: failed to stage audio; producing silent video\n");
        }
    }

    int pipefd[2];
    if (pipe(pipefd) != 0) {
        perror("pipe");
        if (have_audio) unlink(wav_path);
        return 1;
    }

    pid_t pid = fork();
    if (pid < 0) {
        perror("fork");
        close(pipefd[0]); close(pipefd[1]);
        if (have_audio) unlink(wav_path);
        return 1;
    }

View on GitHub (pinned to 44413a9d06)

Solutions

Verify the audio file exists, is readable, and in a supported format.
Check disk space and permissions in the staging directory.
If audio is optional, proceed with the silent video or fix the audio input.

When it happens

Trigger: Thrown at backend/go/stablediffusion-ggml/cpp/gosd.cpp:1232 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of mudler/LocalAI@44413a9d06 (2026-08-15). Data as JSON: /api/errors/a23ceff28ea0534e. Report an issue: GitHub.